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You searched for: Subject term catalytic activity Remove constraint Subject term: catalytic activity Subject term epoxides Remove constraint Subject term: epoxides
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1. Agile Construction of Porous Organic Frameworks Pending Carboxylic Acids and Imidazolium-Based Ionic Liquids for the Efficient Fixation of CO₂ to Cyclic Carbonates

Author:
Yunlong Yang; Yuanlong Guo; Jili Yuan; Haibo Xie; Chengtao Gao; Tianxiang Zhao; Qiang Zheng
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.24 pp. 7990-8001
ISSN:
2168-0485
Subject:
acylation; adsorption; carbon dioxide; carboxylic acids; catalytic activity; composite polymers; density functional theory; energy; epoxides; green chemistry; maleic anhydrides; moieties; porous media; styrene; surface area
Abstract:
... The design and facile preparation of ionic liquids (ILs)-functionalized polymer materials is a hot research topic due to their potential wide applications. Herein, taking the reaction advantage of a cyclic anhydride with an alcoholic compound to atom-economically generate a carboxyl ester pending a carboxylic acid moiety, porous organic framework (POF) materials pending carboxylic acids and imidaz ...
DOI:
10.1021/acssuschemeng.2c01660

2. Biodegradable Copolymers from CO₂, Epoxides, and Anhydrides Catalyzed by Organoborane/Tertiary Amine Pairs: High Selectivity and Productivity

Author:
Jiaxin Liang; Shuxian Ye; Siyuan Wang; Shuanjin Wang; Dongmei Han; Sheng Huang; Zhiheng Huang; Wei Liu; Min Xiao; Luyi Sun; Yuezhong Meng
Source:
Macromolecules 2022 v.55 no.14 pp. 6120-6130
ISSN:
1520-5835
Subject:
biodegradability; carbon dioxide; carbonates; catalysts; catalytic activity; composite polymers; copolymerization; cyclohexenes; epoxides; glass transition; molecular weight; phthalic anhydride; propylene oxide; triethylamine
Abstract:
... Copolymerization of epoxides and carbon dioxide (CO₂) with cyclic anhydrides has been developed to be a facile route to obtain biodegradable poly(ester-co-carbonate)s with diversified structures. Metal-free Lewis acid–base pairs emerging in recent years have offered great opportunities for preparing polymers without metal residuals. Herein, the scope of Lewis bases is extended to the tertiary amin ...
DOI:
10.1021/acs.macromol.2c01118

3. Catalytic Ring-Opening Copolymerization of Fatty Acid Epoxides: Access to Functional Biopolyesters

Author:
Arianna Brandolese; Francesco Della Monica; Miquel À. Pericàs; Arjan W. Kleij
Source:
Macromolecules 2022 v.55 no.7 pp. 2566-2573
ISSN:
1520-5835
Subject:
anhydrides; biopolyesters; catalytic activity; copolymerization; crosslinking; epoxides; fatty acids
Abstract:
... Fatty acid epoxies serve as valuable starting materials for the development of bio-based polyesters. Here we present a new and efficient catalytic process that allows for the copolymerization of fatty acid-based epoxides and various cyclic anhydrides under attractive process conditions affording functional polyesters. The degree of functionalization and the nature of the polymer backbone can be mo ...
DOI:
10.1021/acs.macromol.2c00321

4. Continuous organocatalytic flow synthesis of 2-substituted oxazolidinones using carbon dioxide

Author:
Nicola Zanda; Leijie Zhou; Esther Alza; Arjan W. Kleij; Miquel À. Pericàs
Source:
Green chemistry 2022 v.24 no.11 pp. 4628-4633
ISSN:
1463-9270
Subject:
carbon dioxide; catalysts; catalytic activity; epoxides; green chemistry; oxazolidinones
Abstract:
... A polystyrene-supported 1,5,7-triazabicyclodec-5-ene (TBD) was used as a highly recyclable and stable catalyst for the conversion of epoxy amines into various 2-oxazolidone scaffolds. This approach combines the use of CO₂ as an attractive, cheap and abundant C₁ source with a halide-free, organocatalytic continuous flow approach to promote the efficient synthesis of a small library of pharmaceutica ...
DOI:
10.1039/d2gc00503d

5. Enantioselective desymmetrization reactions in asymmetric catalysis

Author:
Carmen Nájera; Francisco Foubelo; José M. Sansano; Miguel Yus
Source:
Tetrahedron 2022 v.106-107 pp. 132629
ISSN:
0040-4020
Subject:
acylation; alkylation; amides; anhydrides; aziridines; catalytic activity; cyclohexanes; cyclohexenes; dicarboxylic acids; enantioselectivity; epoxides; hydrolysis; lactones; nitrogen; oxidation; oxygen; polyols; silanes
Abstract:
... This review covers the recent developments (since 2015) of enantioselective desymmetrization reactions using metal-catalyzed, organocatalyzed and enzymatic processes of prochiral and meso-compounds. This asymmetric strategy has been applied to a great number of organic compounds such as diarylalkanes, silanes, alcohols, amines and dibenzylmethylamines, as well as unsaturated compounds comprising d ...
DOI:
10.1016/j.tet.2022.132629

6. Enhancing the Catalytic Performance of Group I, II Metal Halides in the Cycloaddition of CO₂ to Epoxides under Atmospheric Conditions by Cooperation with Homogeneous and Heterogeneous Highly Nucleophilic Aminopyridines: Experimental and Theoretical Study

Author:
Wuttichai Natongchai; Sergio Posada-Pérez; Chalida Phungpanya; Jesús Antonio Luque-Urrutia; Miquel Solà; Valerio D’Elia; Albert Poater
Source:
Journal of organic chemistry 2022 v.87 no.5 pp. 2873-2886
ISSN:
1520-6904
Subject:
Lewis bases; atmospheric pressure; carbon dioxide; catalytic activity; cycloaddition reactions; density functional theory; energy; epoxides; molecular weight; organic chemistry; potassium; pyridines; reaction mechanisms; sodium
Abstract:
... Compared to metal–organic complexes and transition-metal halides, group I metal halides are attractive catalysts for the crucial cycloaddition reaction of CO₂ to epoxides as they are ubiquitously available and inexpensive, have a low molecular weight, and are not based on (potentially) endangered metals, especially for the case of sodium and potassium. Nevertheless, given their low intrinsic catal ...
DOI:
10.1021/acs.joc.1c02770

7. Experimental and theoretical investigation for the cycloaddition of carbon dioxide to epoxides catalyzed by potassium and boron co-doped carbon nitride

Author:
Xin Wang; Li Yang; Gang Fu; Yanglin Chen; Chaokun Yang; Jianmin Sun
Source:
Journal of colloid and interface science 2022 v.609 pp. 523-534
ISSN:
0021-9797
Subject:
X-ray photoelectron spectroscopy; adsorption; boron; carbon dioxide; carbon nitride; catalysts; catalytic activity; cycloaddition reactions; density functional theory; epoxides; melamine; potassium; propylene oxide; reaction mechanisms; tetrabutylammonium compounds
Abstract:
... Much endeavor has been devoted to efficient heterogeneous catalysts for carbon dioxide (CO₂) conversion to high-value chemicals. Meanwhile, the cycloaddition of CO₂ to epoxides is considered as a green and atom-economy reaction to produce cyclic carbonates. Herein, a series of K, B co-doped CN with various doping contents (K, B-CN-X) were developed by simple one-step calcination of melamine and KB ...
DOI:
10.1016/j.jcis.2021.11.053

8. Fabricating defect-rich metal–organic frameworks via mixed linker-induced crystal transformation

Author:
Yue Xiao; Lu Han; Jihai Tang; Lifang Tian; Zhuxiu Zhang; Lixiong Zhang; Dong Yang; Xu Qiao
Source:
Chemical communications 2022 v.58 no.52 pp. 7265-7268
ISSN:
1364-548X
Subject:
catalytic activity; epoxides; porosity
Abstract:
... Defect-rich hcp UiO-66-NO₂ was synthesized via mixed linker-induced crystal transformation from fcu UiO-66-NO₂/NH₂. The defect concentration and porosity of hcp UiO-66-NO₂ can be fine-tuned by varying the BDC-NH₂/BDC-NO₂ ratio, which in turn endowed hcp UiO-66-NO₂ with superior catalytic performance in the ring-opening reaction of epoxides with alcohols. ...
DOI:
10.1039/d2cc00923d

9. Flame-retardant activity of ternary integrated modified boron nitride nanosheets to epoxy resin

Author:
Lian Yin; Kaili Gong; Keqing Zhou; Xiaodong Qian; Congling Shi; Zhou Gui; Lijun Qian
Source:
Journal of colloid and interface science 2022 v.608 pp. 853-863
ISSN:
0021-9797
Subject:
boron nitride; carbon; catalytic activity; epoxides; fire safety; flame retardants; heat; nanohybrids; nanosheets; phytic acid; smoke; thermal stability
Abstract:
... In order to improve the fire safety of epoxy resin, ZIF-8 nanoparticle in-situ decorated boron nitride nanosheet (BN-OH/ZIF-8) is fabricated via self-assembly method and then ternary integrated BN-OH/ZIF-8/PA hybrids are prepared through the chemical etching effect of phytic acid. FTIR, XRD, XPS, TEM and TGA measurements are used to characterize the structure and morphology of the nanohybrids. The ...
DOI:
10.1016/j.jcis.2021.10.056

10. Greenery-inspired nanoengineering of bamboo-like hierarchical porous nanotubes with spatially organized bifunctionalities for synergistic photothermal catalytic CO₂ fixation

Author:
Yingchun Guo; Weijia Chen; Lei Feng; Yanchen Fan; Jinsheng Liang; Xiaomei Wang; Xu Zhang
Source:
Journal of materials chemistry A 2022 v.10 no.23 pp. 12418-12428
ISSN:
2050-7496
Subject:
Lewis acids; Lewis bases; carbon dioxide; carbon nanotubes; catalysts; catalytic activity; cycloaddition reactions; epoxides; ionic liquids; irradiation; light intensity; porous media; reaction kinetics; semiconductors; temperature
Abstract:
... The fixation of CO₂ and epoxides into cyclic carbonates is a promising strategy for the resourceful use of CO₂. However, halogen-based homogeneous co-catalysts are usually required for synergistic catalysis in most heterogeneous catalytic systems, which complicates the process of product separation and purification. Furthermore, CO₂ cycloaddition usually requires heating to drive the reaction, mak ...
DOI:
10.1039/d2ta02885a

11. In-situ coprecipitation formed Fe/Zn-layered double hydroxide/ammonium polyphosphate hybrid material for flame retardant epoxy resin via synergistic catalytic charring

Author:
Zhu-Bao Shao; Jing Cui; Xue-Bao Lin; Xiao-Lu Li; Rong-Kun Jian; De-Yi Wang
Source:
Composites 2022 v.155 pp. 106841
ISSN:
1359-835X
Subject:
ammonium polyphosphates; catalytic activity; chemical composition; coprecipitation; epoxides; fire safety; flame retardants; heat; industry; microstructure; smoke
Abstract:
... Inspired by the in-situ coprecipitation technology, Fe/Zn-layered double hydroxides (Fe/Zn-LDH) doped ammonium polyphosphate (APP) was prepared for high fire-safety epoxy resins (EP). The investigation on the chemical composition and micromorphology of Fe/Zn-LDH@APP confirmed the uniform deposition of Fe/Zn-LDH on the surface of APP. The results showed that EP containing 4 wt% Fe/Zn-LDH@APP exhibi ...
DOI:
10.1016/j.compositesa.2022.106841

12. Insights into Thiourea-Based Bifunctional Catalysts for Efficient Conversion of CO₂ to Cyclic Carbonates

Author:
Zhuo-Qun Li; Yao-Yao Zhang; Yu-Jia Zheng; Bo Li; Guang-Peng Wu
Source:
Journal of organic chemistry 2022 v.87 no.5 pp. 3145-3155
ISSN:
1520-6904
Subject:
Lewis acids; Lewis bases; X-ray diffraction; benzene; carbon dioxide; catalysts; catalytic activity; crystal structure; epoxides; hydrogen; organic chemistry; sulfur; thiourea
Abstract:
... The bifunctional thiourea catalyst system with both electrophilic and nucleophilic centers has been certified to be effective for fixing CO₂ under mild reaction conditions; however, many questions remain, especially concerning the relationship between structure and performance. Herein, we systematically studied a series of such bifunctional catalysts with different chain lengths, nucleophilic anio ...
DOI:
10.1021/acs.joc.1c02888

13. Lanthanide metal–organic frameworks for the fixation of CO₂ under aqueous-rich and mixed-gas conditions

Author:
David H. Le; Ryan P. Loughan; Andrzej Gładysiak; Nakul Rampal; Isabelle A. Brooks; Ah-Hyung Alissa Park; David Fairen-Jimenez; Kyriakos C. Stylianou
Source:
Journal of materials chemistry A 2022 v.10 no.3 pp. 1442-1450
ISSN:
2050-7496
Subject:
activation energy; active sites; biogas; carbon; carbon dioxide; carbonates; catalysts; catalytic activity; climate change; epoxides; flue gas; propylene; propylene oxide; topography; value added
Abstract:
... The development of effective catalysts is one of the big challenges associated with a new circular carbon economy addressing climate change. The targeted synthesis of robust and recyclable catalysts can be made possible through elucidation of the molecular interactions between the active sites in metal–organic frameworks (MOFs) with potentially reactive molecules. Herein, we present the use of lan ...
DOI:
10.1039/d1ta09463g

14. Mechanistic insights into catalysis of in-situ iron on pyrolysis of waste printed circuit boards: Comparative study of kinetics, products, and reaction mechanism

Author:
Jingxin Liu; Hanlin Wang; Wenjuan Zhang; Teng Wang; Meng Mei; Si Chen; Jinping Li
Source:
Journal of hazardous materials 2022 v.431 pp. 128612
ISSN:
0304-3894
Subject:
activation energy; bromination; catalysts; catalytic activity; comparative study; energy; environmental protection; epoxides; iron; pyrolysis; pyrolysis oils; reaction mechanisms; thermogravimetry; toxicity
Abstract:
... Pyrolysis is a potential recovery method for waste printed circuit boards (WPCBs), but the organic brominated products are toxic and hazardous. Iron has been used as a catalyst for debromination from pyrolysis oil, but the effects of in-situ iron on WPCBs pyrolysis is still not well understood. Herein, the pyrolysis mechanism for laminates of PCBs in the absence and presence of iron was studied vi ...
DOI:
10.1016/j.jhazmat.2022.128612

15. Modification mechanism of plantation wood via grafting epoxy monomers onto cell walls

Author:
Dengkang Guo; Sheng Yang; Feng Fu; Nai Guo; Gaiyun Li; Fuxiang Chu
Source:
Wood science and technology 2022 v.56 no.3 pp. 813-831
ISSN:
0043-7719
Subject:
Gloeophyllum trabeum; alcohols; biodegradation; catalytic activity; cell walls; compression strength; decay resistance; dimensional stability; epoxides; fungi; hydrophilicity; molecular weight; phthalic anhydride; reaction mechanisms; strength (mechanics); technology; weight loss; wood
Abstract:
... The range of application for fast-growing plantation wood is limited by its dimensional instability, susceptibility to biodegradation and low mechanical strength. In this study, a novel method based on in situ reaction of a hydrophilic epoxy monomer (1,4-butanediol diglycidyl ether) in the wood cell walls was proposed to improve the performance of plantation wood. The effects of curing agent on th ...
DOI:
10.1007/s00226-022-01384-z

16. Multiscale porous single-atom Co catalysts for epoxidation with O₂

Author:
Xiao Chen; Yong Zou; Mingkai Zhang; Wangyan Gou; Sai Zhang; Yongquan Qu
Source:
Journal of materials chemistry A 2022 v.10 no.11 pp. 6016-6022
ISSN:
2050-7496
Subject:
alkenes; carbon; carbonation; catalytic activity; coordination polymers; epoxidation reactions; epoxides
Abstract:
... Epoxides are versatile intermediates in the production of a diverse set of chemical products. The direct epoxidation of alkenes using O₂ represents an environmentally friendly and economical process to replace the use of expensive H₂O₂ or organic peroxides for the synthesis of epoxides. Herein, single-atom Co anchored on N-doped carbon supports with a multiscale porous structure (Co₁/NC-h) has bee ...
DOI:
10.1039/d1ta09227h

17. Nanoporous {Y₂}-Organic Frameworks for Excellent Catalytic Performance on the Cycloaddition Reaction of Epoxides with CO₂ and Deacetalization–Knoevenagel Condensation

Author:
Hongtai Chen; Shurong Liu; Hongxiao Lv; Qi-Pin Qin; Xiutang Zhang
Source:
ACS applied materials & interfaces 2022 v.14 no.16 pp. 18589-18599
ISSN:
1944-8252
Subject:
benzaldehyde; carbon dioxide; catalysts; catalytic activity; cycloaddition reactions; epoxides; nanopores; pyridines; rare earth elements; styrene
Abstract:
... Stable metal–organic frameworks containing periodically arranged nanosized pores and active Lewis acid–base active sites are considered as ideal candidates for efficient heterogeneous catalysis. Herein, the exquisite combination of [Y₂(CO₂)₇(H₂O)₂] cluster (abbreviated as {Y₂}) and multifunctional linker of 2,4,6-tri(2,4-dicarboxyphenyl)pyridine (H₆TDP) led to a nanoporous framework of {[Y₂(TDP)(H ...
DOI:
10.1021/acsami.2c02929

18. Polymeric ionic liquid with carboxyl anchored on mesoporous silica for efficient fixation of carbon dioxide

Author:
Chaokun Yang; Yanglin Chen; Xin Wang; Jianmin Sun
Source:
Journal of colloid and interface science 2022 v.618 pp. 44-55
ISSN:
0021-9797
Subject:
carbon dioxide; carbonates; catalysts; catalytic activity; copolymerization; cycloaddition reactions; epoxides; imidazole; ionic liquids; polymers; porous media; propylene; silica; surface area
Abstract:
... The utilization of carbon dioxide (CO₂) has drawn much attention because of the increasing serious environmental problems. In order to promote the cycloaddition reaction of CO₂ to epoxides, a new synthesis strategy for friendly nonmetal catalyst to combine polymeric ionic liquid (PIL) with mesoporous silica (mSiO₂) was proposed. By thorough characterizations, those catalysts (mSiO₂-PIL-n, n = 1, 2 ...
DOI:
10.1016/j.jcis.2022.03.066

19. Preparation of biopolyols by pyrrolidone ionic liquid-catalyzed ring-opening of epoxidized soybean oils

Author:
Jun Li; Yongyan Kuang; Yanlan Bi; Shangde Sun; Dan Peng
Source:
Industrial crops and products 2022 v.185 pp. 115112
ISSN:
0926-6690
Subject:
Fourier transform infrared spectroscopy; catalytic activity; epoxides; hydrogen; molecular weight; pyrrolidones; soybeans; sulfates; temperature; thermal stability; viscosity
Abstract:
... The effects of N-methyl pyrrolidone hydrogen sulfate ([Hnmp]HSO₄), α-pyrrolidone hydrogen sulfate ([Hnhp]HSO₄), and dinucleated pyrrolidone hydrogen sulfate ([[Hnhp]HSO₄]₂) on ring-opening of epoxidized soybean oils (ESO) was comparatively investigated. Results showed that [Hnhp]HSO₄ had stronger catalytic activity than the other two. Under the optimal conditions ([Hnhp]HSO₄ loading of 6%, water-e ...
DOI:
10.1016/j.indcrop.2022.115112

20. Progress in the catalytic reactions of CO₂ and epoxides to selectively provide cyclic or polymeric carbonates

Author:
Gulzar A. Bhat; Donald J. Darensbourg
Source:
Green chemistry 2022 v.24 no.13 pp. 5007-5034
ISSN:
1463-9270
Subject:
biomedical research; carbon; carbon dioxide; catalytic activity; climate; energy; epoxides; epoxy compounds; green chemistry; organocatalysts; polymers
Abstract:
... Sustainability requires that we reuse spent carbon sources from CO₂ emissions to generate new products and materials. In this regard, carbon capture is a necessary requirement for avoiding disastrous climate changes. Hence, accompanying carbon capture technology is the need for developing low-energy processes for carbon dioxide utilization. The coupling of three-membered cycle ethers, aka oxiranes ...
DOI:
10.1039/d2gc01422j

21. Rationalising the multivariate modulation of MUV-10 for the defect-introduction of multiple functionalised modulators

Author:
Isabel Abánades Lázaro
Source:
Journal of materials chemistry A 2022 v.10 no.19 pp. 10466-10473
ISSN:
2050-7496
Subject:
catalytic activity; epoxides; ligands; porosity; regioselectivity; synthesis
Abstract:
... Among multivariate metal–organic frameworks, multivariate modulated (MTVM) MOFs offer the possibility of introducing multiple functionalised units into the MOFs as defect-compensating ligands promoting porosity among other defect-related properties. However, there are no studies that rationalise the incorporation of multiple functionalised modulators and their resultant properties, hindering their ...
DOI:
10.1039/d2ta00603k

22. Simple carbonaceous-material-loaded mesoporous SiO2 composite catalyst for epoxide-CO2 cycloaddition reaction

Author:
Yifei Ye; Lin Liang; Xiao Zhang; Jianmin Sun
Source:
Journal of colloid and interface science 2022 v.610 pp. 818-829
ISSN:
0021-9797
Subject:
arginine; carbon; carbon dioxide; carbonates; catalysts; catalytic activity; cycloaddition reactions; epoxides; glucose; hydrogen bonding; porous media; propylene; propylene oxide; temperature
Abstract:
... In this paper, a novel arginine-glucose derived carbonaceous-material-loaded SiO₂ composite catalyst (Ar-G-CM/SiO₂) was synthesized from non-toxic and harmless reagents (arginine, glucose and tetraethylorthosilicate) by simple hydrothermal process. Mesoporous SiO₂ with high specific area served as support for carbonaceous material and provided extra hydrogen bond donor (HBD) groups. Ar-G-CM/SiO₂ w ...
DOI:
10.1016/j.jcis.2021.11.134

23. Solvent-free rapid degradation of epoxy composites and recycling application of high performance carbon fibers through the synergic catalysis effect of molten salts and titanium dioxide

Author:
Tianyu Wu; Wenwei Zhan; Xiaolong Jia; Hua Li; Gang Sui; Xiaoping Yang
Source:
Polymer degradation and stability 2022 v.196 pp. 109849
ISSN:
0141-3910
Subject:
aircraft; carbon; carbon fibers; catalytic activity; chemical structure; cleavage (chemistry); crystallization; environmental protection; epoxides; industry; polypropylenes; pyrolysis; sustainable development; tensile strength; thermal stability; titanium dioxide
Abstract:
... Along with the massive application of the carbon fiber reinforced polymer (CFRP), the quantity of CFRP wastes are rapidly increasing, becoming an urgent issue to be resolved. Here, an effective solvent-free treatment method was proposed to recycle carbon fiber/epoxy composite wastes and reclaim the carbon fibers with high performance. The resin matrix composed of tetra-functional epoxy/aromatic am ...
DOI:
10.1016/j.polymdegradstab.2022.109849

24. Strategic Design of Mg-Centered Porphyrin Metal–Organic Framework for Efficient Visible Light-Promoted Fixation of CO₂ under Ambient Conditions: Combined Experimental and Theoretical Investigation

Author:
Rajesh Das; Surya Sekhar Manna; Biswarup Pathak; C. M. Nagaraja
Source:
ACS applied materials & interfaces 2022 v.14 no.29 pp. 33285-33296
ISSN:
1944-8252
Subject:
adsorption; carbon dioxide; catalysts; catalytic activity; chlorophyll; coordination polymers; cycloaddition reactions; energy; epoxides; greenhouse gases; heat; irradiation; light; remediation; value added
Abstract:
... The sunlight-driven fixation of CO₂ into valuable chemicals constitutes a promising approach toward environmental remediation and energy sustainability over traditional thermal-driven fixation. Consequently, in this article, we report a strategic design and utilization of Mg-centered porphyrin-based metal–organic framework (MOFs) having relevance to chlorophyll in green plants as a visible light-p ...
DOI:
10.1021/acsami.2c07969

25. Sustainable Synthesis of Epoxides from Halohydrin Cyclization by Composite Solid-Based Catalysts

Author:
Ching-Yuan Chang; Yu-Fan Chen; Yi-Ta Tsai; Chien-Fu Huang; Yung-Tin Pan; De-Hao Tsai
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.28 pp. 9970-9980
ISSN:
1520-5045
Subject:
X-ray diffraction; adsorption; byproducts; catalysts; catalytic activity; epoxides; glycidol; process design; spectrometers
Abstract:
... A facile synthesis of CaO- and MgO-based composite solid-based catalysts is demonstrated for a sustainable synthesis of epoxides from halohydrin cyclization (i.e., via heterogeneous catalysis). The cyclodehydrohalogenation of 3-chloro-1,2-propanediol (3-MCH) to glycidol (GLD) was chosen as the representative of the study. The activity, selectivity, and operation stability of the developed composit ...
DOI:
10.1021/acs.iecr.2c01064

26. Synergistic effect of GO/SrFe₁₂O₁₉ as magnetic hybrid nanocatalyst for regioselective ring-opening of epoxides with amines under eco-friendly conditions

Author:
Mouhsine Laayati; Ayoub Abdelkader Mekkaoui; Lahcen Fkhar; Mustapha Ait Ali; Hafid Anane; Lahoucine Bahsis; Larbi El Firdoussi; Soufiane El Houssame
Source:
RSC advances 2022 v.12 no.18 pp. 11139-11154
ISSN:
2046-2069
Subject:
catalytic activity; coprecipitation; density functional theory; epoxides; graphene; graphene oxide; magnetism; nanocatalysts; nanocomposites; oxidation; regioselectivity; strontium; surface area; synergism
Abstract:
... Herein, a highly efficient magnetically separable hybrid GO/SrFe₁₂O₁₉ nanocomposite was synthesized via dispersing M-type strontium hexaferrite (SrFe₁₂O₁₉) on graphene oxide (GO) sheets. First, SrFe₁₂O₁₉ nanoparticles (NPs) and GO sheets were prepared via chemical coprecipitation and chemical oxidation of graphite powder, respectively. Chemically reduced GO (rGO) and rGO/SrFe₁₂O₁₉ were also prepar ...
DOI:
10.1039/d2ra00984f

27. Synthesis of Unsaturated (Co)polyesters from Ring-Opening Copolymerization by Aluminum Bipyridine Bisphenolate Complexes with Improved Protonic Impurities Tolerance

Author:
Xiao-Lu Chen; Bin Wang; Li Pan; Yue-Sheng Li
Source:
Macromolecules 2022 v.55 no.9 pp. 3502-3512
ISSN:
1520-5835
Subject:
Lewis acids; Lewis bases; aluminum; catalysts; catalytic activity; composite polymers; copolymerization; epoxides; ligands; maleic acid; maleic anhydrides; polyols
Abstract:
... Synthesis of unsaturated polyesters (UPES) via ring-opening copolymerization (ROCOP) of maleic anhydride (MAH) and epoxides still remains a great challenge, because the reported catalytic systems generally showed low catalytic activity or complete deactivation at low catalyst concentration and exhibit poor tolerance to protonic impurities. In this work, we synthesized a series of bipyridine bisphe ...
DOI:
10.1021/acs.macromol.2c00034

28. Synthesis of nucleoside-substituted carbonate and diol derivatives through the carbon dioxide reaction using polyionic liquid catalysts

Author:
Gui-Qing Xu; Xue-Ning Ma; Xian-Bin Jia; Ya-Hao Dong; Yu-Qin Jiang; Xin-Juan Li
Source:
Green chemistry 2022 v.24 no.11 pp. 4573-4580
ISSN:
1463-9270
Subject:
alkalinity; carbon dioxide; carbonates; catalysts; catalytic activity; cycloaddition reactions; epoxides; green chemistry; hydrolysis; ionic liquids; nucleosides
Abstract:
... It is of great significance to efficiently synthesize compounds with pharmacological activities through CO₂ conversion. Herein, polyionic liquids (PILs) with adjustable structures and multiple active sites were synthesized. With epoxy nucleoside as a solid substrate, cycloaddition and carbonate hydrolysis were carried out under the catalysis of polyionic liquid and the participation of CO₂ and wat ...
DOI:
10.1039/d2gc00566b

29. Synthesis of porous poly(ionic liquid)s for chemical CO₂ fixation with epoxides

Author:
Guoqing Li; Shu Dong; Ping Fu; Qihong Yue; Yu Zhou; Jun Wang
Source:
Green chemistry 2022 v.24 no.9 pp. 3433-3460
ISSN:
1463-9270
Subject:
alkylation; ambient temperature; carbon dioxide; catalysts; catalytic activity; condensation reactions; copolymerization; cycloaddition reactions; energy; epoxides; free radicals; green chemistry; greenhouse gas emissions; ionic liquids; polymers; schiff bases; synthesis
Abstract:
... Chemical carbon dioxide (CO₂) fixation via cycloaddition with high energy three-membered ring compounds such as epoxides is among the most promising pathways to reduce the greenhouse gas emission and achieve the utilization of CO₂ as an abundant C1 resource, favoring the alleviation of the global energy and environmental issues. A great number of catalysts have been developed, while heterogeneous ...
DOI:
10.1039/d2gc00324d

30. Towards highly efficient continuous-flow catalytic carbon dioxide cycloadditions with additively manufactured reactors

Author:
David Valverde; Raúl Porcar; Marcileia Zanatta; Sergio Alcalde; Belen Altava; Victor Sans; Eduardo García-Verdugo
Source:
Green chemistry 2022 v.24 no.8 pp. 3300-3308
ISSN:
1463-9270
Subject:
carbon dioxide; catalysts; catalytic activity; chemical industry; cycloaddition reactions; epoxides; green chemistry; hydrogen; surface area
Abstract:
... Developing efficient and sustainable methodologies to transform CO₂ into added-value chemicals is an important strategy for decarbonization in the chemical industry. Here, a new multi-scale approach for the cycloaddition of CO₂ to epoxides is reported, designed by combining the hydrogen bonding ability, metal-free catalysts and supported ionic liquids on polymers. The use of additive manufacturing ...
DOI:
10.1039/d1gc04593h

31. Zinc(II)porphyrin-Based Porous Ionic Polymers (PIPs) as Multifunctional Heterogeneous Catalysts for the Conversion of CO₂ to Cyclic Carbonates

Author:
Xiaolong Bai; Zhenping Su; Jiaojiao Wei; Linjing Ma; Sujiao Duan; Ning Wang; Xiongfu Zhang; Jun Li
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.15 pp. 5093-5102
ISSN:
1520-5045
Subject:
Lewis bases; carbon dioxide; catalysts; catalytic activity; copolymerization; epoxides; imidazoles; metalloporphyrins; polymers; process design; solvents; surface area; synergism; thermal stability; zinc
Abstract:
... The heterogeneous and multifunctional charged polymers have broad application prospects in modern catalysis. One of the valid methods of synthesizing multifunctional charged polymers is incorporating metalloporphyrins with halide anions. Herein, a series of zinc(II)porphyrin-based porous ionic polymers [PIP-ZnTIPP/DVB (1:m) (m = 20, 40, 60, 80)] were synthesized by combining imidazolium-functional ...
DOI:
10.1021/acs.iecr.2c00161

32. Zn and N co-doped porous carbon nanosheets for photothermally-driven CO2 cycloaddition

Author:
Yi Liu; Ying Chen; Yunli Liu; Zewen Chen; Huan Yang; Zhongxiao Yue; Qing Fang; Yunfei Zhi; Shaoyun Shan
Source:
Journal of catalysis 2022 v.407 pp. 65-76
ISSN:
0021-9517
Subject:
Lewis acids; Lewis bases; absorption; adsorption; carbon; carbon dioxide; carbonates; catalytic activity; cycloaddition reactions; energy; epoxides; irradiation; nanosheets; pyrolysis; solar energy
Abstract:
... Solar energy is considered as the cleanest, cheapest, and most sustainable energy source, and CO₂ cycloaddition that is drove by solar energy has unique advantages in the aspect of energy and environmental. Therefore, Zn and N co-doped porous carbon nanosheets (ZNCs), which were synthesized by a simple one-step pyrolysis method, as catalysts and photothermal material to photothermally drive cycloa ...
DOI:
10.1016/j.jcat.2022.01.016

33. Zr(IV) Catalyst for the Ring-Opening Copolymerization of Anhydrides (A) with Epoxides (B), Oxetane (B), and Tetrahydrofurans (C) to Make ABB- and/or ABC-Poly(ester-alt-ethers)

Author:
Ryan W. F. Kerr; Charlotte K. Williams
Source:
Journal of the American Chemical Society 2022 v.144 no.15 pp. 6882-6893
ISSN:
1520-5126
Subject:
catalysts; catalytic activity; copolymerization; epoxides; glass transition; hydrolysis; kinetics; phthalic anhydride; tetrahydrofuran
Abstract:
... Poly(ester-alt-ethers) can combine beneficial ether linkage flexibility and polarity with ester linkage hydrolysability, furnishing fully degradable polymers. Despite their promising properties, this class of polymers remains underexplored, in part due to difficulties in polymer synthesis. Here, a catalyzed copolymerization using commercially available monomers, butylene oxide (BO)/oxetane (OX), t ...
DOI:
10.1021/jacs.2c01225

34. Alkali Metal Carboxylates: Simple and Versatile Initiators for Ring-Opening Alternating Copolymerization of Cyclic Anhydrides/Epoxides

Author:
Chong-Min Chen; Xiaowei Xu; He-Yuan Ji; Bin Wang; Li Pan; Yi Luo; Yue-Sheng Li
Source:
Macromolecules 2021 v.54 no.2 pp. 713-724
ISSN:
1520-5835
Subject:
Fourier transform infrared spectroscopy; Lewis acids; Lewis bases; anhydrides; catalytic activity; copolymerization; cyclohexenes; density functional theory; epoxides; metal ions; molecular weight; phthalates; potassium acetate; propylene oxide; temperature
Abstract:
... In this contribution, we thoroughly investigated the ring-opening alternating copolymerization (ROAC) of cyclic anhydride and epoxide by using commercially available alkali metal carboxylates (AMCs) as the simple and green initiators. The idea of our work is based on the coordination effects of epoxide on an AMC and the formation of AMC–epoxide adducts, which will weaken the interaction between me ...
DOI:
10.1021/acs.macromol.0c02389

35. Anthracene-triazole-dicarboxylate-Based Zn(II) 2D Metal Organic Frameworks for Efficient Catalytic Carbon Dioxide Fixation into Cyclic Carbonates under Solvent-Free Condition and Theoretical Study for the Reaction Mechanism

Author:
Aloke Kumar Ghosh; Urmila Saha; Surajit Biswas; Zeid A. ALOthman; Md Ataul Islam; Malay Dolai
Source:
Industrial & engineering chemistry process design and development 2021 v.61 no.1 pp. 175-186
ISSN:
1520-5045
Subject:
carbon dioxide; carbon dioxide fixation; carbonates; catalytic activity; density functional theory; energy; epoxides; ethane; process design; reaction mechanisms; temperature
Abstract:
... Two Znᴵᴵ-based metal organic frameworks (MOFs) [Zn₂(L)₂(1,2-bis(4-pyridyl)ethane)₄]ₙ [(ZnMOF1)] and [Zn₂(L)₂(1,2-bis(4-pyridyl)ethene)₄]ₙ [(ZnMOF2)] have been synthesized and crystallographically characterized. Due to the presence of Lewis acidic center Zn and basic functional groups (−N═N) in both complex [(ZnMOF1)] and [(ZnMOF2)], it is possible to efficiently fix carbon dioxide into epoxides to ...
DOI:
10.1021/acs.iecr.1c03291

36. Asymmetric epoxidation of α,β-unsaturated ketones via an amine-thiourea dual activation catalysis

Author:
Lu-Wen Zhang; Li Wang; Nan Ji; Si-Yang Dai; Wei He
Source:
Tetrahedron letters 2021 v.68 pp. 152941
ISSN:
0040-4039
Subject:
catalysts; catalytic activity; deprotonation; epoxidation reactions; epoxides; oxidants; stereoselectivity
Abstract:
... A simple asymmetric epoxidation method is developed to effectively synthesize chiral α-carbonyl epoxides through an amine-thiourea dual activation catalysis. In this method, TBHP, as an oxidant, determined the reaction rate, and the chiral amine-thiourea catalyst effectively controlled the stereoselectivity of the reaction, and KOH promoted deprotonation. 22 examples of α,β-unsaturated ketones wit ...
DOI:
10.1016/j.tetlet.2021.152941

37. Chemoenzymatic Epoxidation of Highly Unsaturated Fatty Acid Methyl Ester and Its Application as Poly(lactic acid) Plasticizer

Author:
Alejandro Sustaita-Rodríguez; Alejandro Vega-Rios; Alejandro Bugarin; Víctor H. Ramos-Sánchez; Alejandro A. Camacho-Dávila; Beatriz Rocha-Gutiérrez; David Chávez-Flores
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.50 pp. 17016-17024
ISSN:
2168-0485
Subject:
Pseudozyma antarctica; biocatalysts; biodiesel; carboxylic ester hydrolases; catalytic activity; epoxidation reactions; epoxides; fatty acid methyl esters; grape seeds; grapeseed oil; green chemistry; plasticizers; potassium; transesterification
Abstract:
... It is well known that petroleum-derived plasticizers are causing continuous environmental and health issues. Recently, fatty acid methyl esters (FAMEs), also known as biodiesels, have emerged as sustainable alternatives to produce epoxides that can be used as greener plasticizers. In this regard, enzymatic catalysis has emerged as an ideal alternative for the epoxidation of biodiesels due to the o ...
DOI:
10.1021/acssuschemeng.1c05934

38. Chiral titanium(IV) and vanadium(V) salen complexes as catalysts for carbon dioxide and epoxide coupling reactions

Author:
Svetlana A. Kuznetsova; Ilia V. Gorodishch; Alexander S. Gak; Valeria V. Zherebtsova; Igor S. Gerasimov; Michael G. Medvedev; Dinara Kh. Kitaeva; Ekaterina A. Khakina; Michael North; Yuri N. Belokon
Source:
Tetrahedron 2021 v.82 pp. 131929
ISSN:
0040-4020
Subject:
Lewis acids; Lewis bases; ambient temperature; atmospheric pressure; carbon dioxide; catalysts; catalytic activity; epoxides; tetrabutylammonium compounds; titanium; vanadium
Abstract:
... Chiral titanium(IV) and vanadium(V) salen complexes were found to catalyse the synthesis of cyclic carbonates from carbon dioxide and epoxides. Reactions could be conducted at room temperature and 50 bar pressure of carbon dioxide or at 100 °C and atmospheric pressure with catalyst concentrations as low as 0.1 mol% and co-catalyst (tetrabutylammonium bromide) concentrations as low as 0.5 mol%. The ...
DOI:
10.1016/j.tet.2021.131929

39. Co(III)-Salen immobilized cellulose nanocrystals for efficient catalytic CO2 fixation into cyclic carbonates under mild conditions

Author:
Lingling Hu; Qiujian Xie; Juntao Tang; Chunyue Pan; Guipeng Yu; Kam Chiu Tam
Source:
Carbohydrate polymers 2021 v.256 pp. 117558
ISSN:
0144-8617
Subject:
carbon dioxide; carbon dioxide fixation; catalysts; catalytic activity; cellulose; cycloaddition reactions; epoxides; green chemistry; greenhouses; nanocrystals; sulfates
Abstract:
... Searching for green, recyclable and highly efficient catalyst for the synthesis of cyclic carbonates from CO₂ is of great importance because it is profitable for reducing the greenhouse effects and meets the principles of green chemistry. Herein, a series of cellulose nanocrystals, either the pristine or modified ones (TEMPO oxidized and Co(III)salen immobilized), were explored as catalysts for cy ...
DOI:
10.1016/j.carbpol.2020.117558

40. Co-based metal-organic framework with phosphonate and triazole structures for enhancing fire retardancy of epoxy resin

Author:
Xingwen Yang; Liang Zhao; Fei Peng; Yun Zhu; Guiyou Wang
Source:
Polymer degradation and stability 2021 v.193 pp. 109721
ISSN:
0141-3910
Subject:
carbonation; carboxylic acids; catalytic activity; cobalt; coordination polymers; degradation; epoxides; flame retardants; glass transition temperature; heat; ligands; nitrogen; oxidation; oxygen; phosphonates; phosphorus; smoke; toxicity; triazoles
Abstract:
... A phosphonate and triazole containing binary carboxylic acid ligand was synthesized via azide-alkyne “click” reaction, which was further coordinated with cobalt nodes to form metal-organic framework (MOF) containing two important fire retardant elements, phosphorus and nitrogen (PN-MOF). With the loading of 6 wt% PN-MOF in epoxy resin (EP), the peak heat release rate, average heat release rate, to ...
DOI:
10.1016/j.polymdegradstab.2021.109721

41. Cobalt Porphyrin-Cross-Linked Poly(Ionic Liquid)s as Efficient Heterogeneous Catalysts for Carbon Dioxide Conversion under Mild Conditions

Author:
Yuxia Liu; Shiting Wang; Zhifeng Dai; Yubing Xiong
Source:
Industrial & engineering chemistry process design and development 2021 v.60 no.50 pp. 18218-18229
ISSN:
1520-5045
Subject:
Lewis acids; Lewis bases; anion exchange; carbon dioxide; catalytic activity; chlorides; climate change; cobalt; crosslinking; cycloaddition reactions; epoxides; halogens; ionic liquids; polymers; porphyrins; process design
Abstract:
... The cycloaddition reaction of CO₂ and epoxides to form cyclic carbonates is a promising strategy to alleviate the climate change caused by CO₂ in view of its high atomic economic efficiency and solvent-free and mild conditions. Inspired by the mechanism of cycloaddition reactions catalyzed by Lewis acid/Lewis base binary systems, we explored a series of heterogeneous catalysts functionalized by co ...
DOI:
10.1021/acs.iecr.1c03340

42. Cobalt phthalocyanine-based nanodots as efficient catalysts for chemical conversion of CO2 under ambient conditions

Author:
Ding Guo; Juan Zhang; Genyan Liu; Xiaogang Luo; Fengshou Wu
Source:
Journal of materials science 2021 v.56 no.18 pp. 10990-10999
ISSN:
0022-2461
Subject:
X-radiation; X-ray diffraction; carbon dioxide; carbonization; catalytic activity; chemical composition; citric acid; cobalt; energy; epoxides; green chemistry; organometallic compounds; spectral analysis; styrene; sustainable development; temperature; thermal stability; transmission electron microscopy
Abstract:
... The chemical fixation of CO₂ into epoxides to afford cyclic carbonates has received considerable attention due to the 100% atom economy, which is in accordance with the concept of green chemistry and sustainable development. Here, we develop a facile and high-output strategy to fabricate cobalt phthalocyanine-based nanodots (CoPc-NDs) by the carbonization of citric acid and cobalt phthalocyanine c ...
DOI:
10.1007/s10853-021-05964-5

43. Comparative Study of Direct and Graphite-Mediated Oxidation of Large PAHs

Author:
Jürgen Weippert; Philipp Huber; Jakob Hauns; Akimitsu Narita; Klaus Müllen; Konstantin Y. Amsharov; Artur Böttcher; Manfred M. Kappes
Source:
Journal of physical chemistry 2021 v.125 no.15 pp. 8163-8176
ISSN:
1932-7455
Subject:
catalytic activity; chemical structure; comparative study; desorption; epoxides; fullerene; graphene; lactones; oxidation; oxygen; oxygen isotopes; quinones
Abstract:
... We have used a surface-science-based, ion-beam-soft-landing approach to study the heterogeneous oxidation of a series of large polycyclic aromatic hydrocarbons (PAHs) deposited onto highly oriented pyrolytic graphite (HOPG). The reactivities of well-defined thin films of hexabenzocoronene (C₄₂H₁₈), pentacene (C₂₂H₁₄), fullerene precursor (C₆₀H₃₀), and rubrene (C₄₂H₂₈) with effusive beams of oxygen ...
DOI:
10.1021/acs.jpcc.0c11271

44. Constructing ABA- and ABCBA-Type Multiblock Copolyesters with Structural Diversity by Organocatalytic Self-Switchable Copolymerization

Author:
Chen Li; Yan-Feng Dang; Bin Wang; Li Pan; Yue-Sheng Li
Source:
Macromolecules 2021 v.54 no.13 pp. 6171-6181
ISSN:
1520-5835
Subject:
anhydrides; catalytic activity; chemoselectivity; composite polymers; copolymerization; density functional theory; epoxides; organocatalysts; polyesters
Abstract:
... Self-switchable ring-opening copolymerization of epoxides, cyclic anhydrides, and cyclic esters catalyzed by an organocatalyst has been proved to be a promising approach to sequence-controlled (multi)block copolymers. However, the scope of the cyclic esters is only limited to lactide, and selection of some anhydrides usually produced random copolymers with an ill-defined sequence. To overcome thes ...
DOI:
10.1021/acs.macromol.1c00767

45. Construction of a PPIL@COF core–shell composite with enhanced catalytic activity for CO₂ conversion

Author:
Yi-Ran Du; Guang-Rong Ding; Yao-Feng Wang; Bao-Hua Xu; Suo-Jiang Zhang
Source:
Green chemistry 2021 v.23 no.6 pp. 2411-2419
ISSN:
1463-9270
Subject:
adsorption; carbon dioxide; catalytic activity; epoxides; green chemistry; hydrogen bonding; ionic liquids; porous media; reaction kinetics; value added
Abstract:
... Converting CO₂ into high value-added chemicals is a promising approach for CO₂ utilization. It is imperative to develop novel catalysts for both selective and high adsorption of CO₂ and thereafter efficient chemical transformation. Herein, bromide-based porous poly(ionic liquid)s (PPILs) were covalently integrated with mesoporous covalent organic frameworks (COFs) to provide a kind of core–shell h ...
DOI:
10.1039/d1gc00267h

46. Cycloaddition of Biogas-Contained CO₂ into Epoxides via Ionic Polymer Catalysis: An Experimental and Process Simulation Study

Author:
Xutao Hu; Felix D. Bobbink; Antoine van Muyden; Masoud Talebi Amiri; Alexy Bonnin; François Maréchal; Mohammad K. Nazeeruddin; Zhiwen Qi; Paul J. Dyson
Source:
Industrial & engineering chemistry process design and development 2021 v.60 no.49 pp. 17942-17948
ISSN:
1520-5045
Subject:
biogas; carbon dioxide; carbonates; catalysts; catalytic activity; cycloaddition reactions; epoxides; polymers; process design; propylene; propylene oxide; streams; value added
Abstract:
... Biogas upgrading technologies are crucial for the production of high-purity biomethane. Efficient CO₂ removal methods that are currently commercialized rely on “catch-and-release” mechanisms, and the CO₂ stream is usually discharged into the atmosphere without further utilization. From the standpoint of process sustainability, it would be advantageous to transform the CO₂ in biogas streams into va ...
DOI:
10.1021/acs.iecr.1c03895

47. Deep Eutectic Solvents as Efficient Catalysts for Fixation of CO₂ to Cyclic Carbonates at Ambient Temperature and Pressure through Synergetic Catalysis

Author:
Xiaoqing Yang; Qizhuang Zou; Tianxiang Zhao; Peng Chen; Zimin Liu; Fei Liu; Qian Lin
Source:
ACS sustainable chemistry & engineering 2021 v.9 no.31 pp. 10437-10443
ISSN:
2168-0485
Subject:
ambient temperature; carbon dioxide; catalytic activity; epoxides; green chemistry
Abstract:
... A series of deep eutectic solvents (DESs), consisting of protic ionic liquids (PILs) and amines, feature effective catalytic activity for the fixation of CO₂ to cyclic carbonates at ambient temperature and pressure without any solvents and additives. Good yields of cyclic carbonates are achieved (up to 99%), and no obvious deactivation in catalytic activity is found after five cycles. Mechanistic ...
DOI:
10.1021/acssuschemeng.1c03187

48. Development of a Nitrazine Yellow-glycidyl methacrylate coating onto cotton fabric through thermal-induced radical polymerization reactions: a simple approach towards wearable pH sensors applications

Author:
Valentina Trovato; Alessandra Vitale; Roberta Bongiovanni; Ada Ferri; Giuseppe Rosace; Maria Rosaria Plutino
Source:
Cellulose 2021 v.28 no.6 pp. 3847-3868
ISSN:
0969-0239
Subject:
catalytic activity; cellulose; chemical bonding; color; cotton; cotton fabric; epoxides; infrared spectroscopy; nuclear magnetic resonance spectroscopy; pH; polymerization; potassium persulfate; reflectance; sulfonates; ultraviolet-visible spectroscopy
Abstract:
... In this paper, the bifunctional monomer glycidyl methacrylate (GMA) was employed in a simple two-step synthetic strategy with the aim of developing a Nitrazine Yellow-based pH-meter wearable sensor. The catalyzed epoxy ring-opening of GMA allowed the formation of a covalent bond with the sulfonate groups of the halochromic dyestuff, while potassium persulfate thermally initiated the radical grafti ...
DOI:
10.1007/s10570-021-03733-w

49. Different functional groups modified porous organic polymers used for low concentration CO₂ fixation

Author:
Zhifeng Dai; Yuanfei Bao; Jindong Yuan; Jinzhong Yao; Yubing Xiong
Source:
Chemical communications 2021 v.57 no.76 pp. 9732-9735
ISSN:
1364-548X
Subject:
carbon dioxide; catalytic activity; cycloaddition reactions; epoxides; ionic liquids
Abstract:
... Through a facile post-synthetic method, different kinds of polar group-functionalized ionic liquid porous organic polymers (POP-PA-COOH, POP-PA-OH, and POP-PA-NH₂) were obtained. The materials can be used as efficient heterogeneous catalysts in the cycloaddition reaction of CO₂ with epoxides under mild and co-catalyst-free conditions. It is demonstrated that POP-PA-NH₂ possesses much higher cataly ...
DOI:
10.1039/d1cc03178c

50. Direct oxidative carboxylation of terminal olefins to cyclic carbonates by tungstate assisted-tandem catalysis

Author:
Roberto Calmanti; Maurizio Selva; Alvise Perosa
Source:
Green chemistry 2021 v.23 no.19 pp. 7609-7619
ISSN:
1463-9270
Subject:
ammonium; carbon dioxide; carbonates; carboxylation; catalysts; catalytic activity; cyclohexenes; epoxidation reactions; epoxides; green chemistry; iodides; ionic liquids; olefin; oxidants; phosphoric acid; styrene; tetrabutylammonium compounds
Abstract:
... Tungstate catalysts are well established for olefin epoxidation reactions, while their catalytic activity for CO₂ insertion in epoxides is a more recent discovery. This dual reactivity of tungstate prompted the present development of a catalytic tandem process for the direct conversion of olefins into the corresponding cyclic organic carbonates (COCs). Each of the two steps was studied in the pres ...
DOI:
10.1039/d1gc02603h