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1. Brønsted base-catalyzed imino-ene-type allylation reactions of simple alkenes as unactivated allyl compounds

Author:
Yasuhiro Yamashita; Io Sato; Ryota Fukuyama; Shū Kobayashi
Source:
Chemical communications 2022 v.58 no.17 pp. 2866-2869
ISSN:
1364-548X
Subject:
propylene,   etc   ; allylation; temperature;     Show all 3 Subjects
Abstract:
... Catalytic imino-ene-type allylation reactions of unactivated allyl compounds were achieved. In the presence of a catalytic amount of a strongly basic KOᵗBu-LiTMP or NaOᵗBu-LiTMP mixed system, the desired reactions proceeded smoothly at low temperature. Notably, a gaseous alkene, propylene, could also be used in this reaction system. ...
DOI:
10.1039/d1cc06983g

2. Enhancing the propylene/propane separation performances of ZIF-8 membranes by post-synthetic surface polymerization

Author:
Sunghwan Park; Kie Yong Cho; Hae-Kwon Jeong
Source:
Journal of materials chemistry A 2022 v.10 no.4 pp. 1940-1947
ISSN:
2050-7496
Subject:
propylene,   etc   ; ligands; polymerization; propane;     Show all 4 Subjects
Abstract:
... Zeolitic-imidazole framework-8 (ZIF-8) membranes have shown exceptional propylene/propane separation performances. Their commercial applications have, however, been impeded by several challenges. One such challenge is the difficulty of managing microstructural defects (i.e., grain boundary defects) in a consistent manner, leading to poor membrane performances and ultimately to a reproducibility is ...
DOI:
10.1039/d1ta08705c

3. Plasticization-enhanced trimethylbenzene functionalized polyethersulfone hollow fiber membranes for propylene and propane separation

Author:
Can Zeng Liang; Wai Fen Yong; Ji Wu; Martin Weber; Christian Maletzko; Juin-Yih Lai; Tai-Shung Chung
Source:
Journal of membrane science 2022 v.647 pp. 120293
ISSN:
0376-7388
Subject:
propylene,   etc   ; permeability; polymers; propane;     Show all 4 Subjects
Abstract:
... Polymeric membranes for gas separations often suffer from plasticization, which leads to the swelling of polymer matrices and thus the loss of the separation selectivity and performance. Such intrinsic and detrimental issues remain challenging and unsolved. Here, we report a newly designed polymer, poly trimethyl phenylene ethersulfone (PTPES) that is a trimethylbenzene-functionalized polyethersul ...
DOI:
10.1016/j.memsci.2022.120293

4. A sacrificial ZIF-L seed layer for sub-100 nm thin propylene-selective ZIF-8 membranes

Author:
Chanjong Yu; Yeong jae Kim; Jongbum Kim; Mikio Hayashi; Dae Woo Kim; Hyuk Taek Kwon; Kiwon Eum
Source:
Journal of materials chemistry A 2022 v.10 no.29 pp. 15390-15394
ISSN:
2050-7496
Subject:
propylene,   etc   ; crystallization; markets; polymers; propane;     Show all 5 Subjects
Abstract:
... Extensive research has been conducted to synthesize polycrystalline zeolitic imidazolate framework-8 (ZIF-8) membranes with exceptional capability for diffusion-based propylene/propane separation. For practical applications of the membranes, membrane productivity must be enhanced to counterbalance the relatively high membrane production cost in comparison with those of polymeric membranes, which a ...
DOI:
10.1039/d2ta02691k

5. Surface modification of bilayer structure on metal-organic frameworks towards mixed matrix membranes for efficient propylene/propane separation

Author:
Yuxiu Sun; Lei Tian; Zhihua Qiao; Chenxu Geng; Xiangyu Guo; Chongli Zhong
Source:
Journal of membrane science 2022 v.648 pp. 120350
ISSN:
0376-7388
Subject:
propylene,   etc   ; crosslinking; olefin; permeability; propane;     Show all 5 Subjects
Abstract:
... Rational matching of filler-matrix in mixed matrix membranes (MMMs) is crucial but challenging for highly efficient gas separation. Herein, we propose a bilayer structure modification strategy on metal-organic frameworks (MOFs) to design various MOF-based MMMs for efficient propylene/propane separation. The octadecylphosphonic acid-lecithin-cholesterol bilayer structure grafted onto the surface of ...
DOI:
10.1016/j.memsci.2022.120350

6. Direct Propylene Epoxidation with Molecular Oxygen over Cobalt-Containing Zeolites

Author:
Weijie Li; Guangjun Wu; Wende Hu; Jian Dang; Chuanming Wang; Xuefei Weng; Ivan da Silva; Pascal Manuel; Sihai Yang; Naijia Guan; Landong Li
Source:
Journal of the American Chemical Society 2022 v.144 no.9 pp. 4260-4268
ISSN:
1520-5126
Subject:
propylene; propylene oxide,   etc   ; acrolein; byproducts; catalytic activity; cobalt; density functional theory; epoxidation reactions; isomerization; oxygen; spectroscopy; zeolites;     Show all 12 Subjects
Abstract:
... Direct propylene epoxidation with molecular oxygen is a dream reaction with 100% atom economy, but aerobic epoxidation is challenging because of the undesired over-oxidation and isomerization of epoxide products. Herein, we report the construction of uniform cobalt ions confined in faujasite zeolite, namely, Co@Y, which exhibits unprecedented catalytic performance in the aerobic epoxidation of pro ...
DOI:
10.1021/jacs.2c00792

7. Insights into the Mechanism of Carbon Dioxide and Propylene Oxide Ring-Opening Copolymerization Using a Co(III)/K(I) Heterodinuclear Catalyst

Author:
Arron C. Deacy; Andreas Phanopoulos; Wouter Lindeboom; Antoine Buchard; Charlotte K. Williams
Source:
Journal of the American Chemical Society 2022 v.144 no.39 pp. 17929-17938
ISSN:
1520-5126
Subject:
propylene; propylene oxide,   etc   ; Lewis bases; byproducts; carbon dioxide; carbonates; catalysts; cobalt; copolymerization; density functional theory; energy; potassium; temperature;     Show all 13 Subjects
Abstract:
... A combined computational and experimental investigation into the catalytic cycle of carbon dioxide and propylene oxide ring-opening copolymerization is presented using a Co(III)K(I) heterodinuclear complex (Deacy, A. C.Co(III)/Alkali-Metal(I) Heterodinuclear Catalysts for the Ring-Opening Copolymerization of CO₂ and Propylene Oxide. J. Am. Chem. Soc.2020, 142(45), 19150−19160). The complex is a ra ...
DOI:
10.1021/jacs.2c06921

8. The stability, optical behavior optimization of Ag@SiO2 nanofluids and their application in spectral splitting photovoltaic/thermal receivers

Author:
Ju Huang; Xinyue Han; Xiaobo Zhao; Azhar Abbas Khosa; Chunfeng Meng
Source:
Renewable energy 2022 v.190 pp. 865-878
ISSN:
0960-1481
Subject:
propylene glycol,   etc   ; heat; nanofluids; solar radiation; temperature;     Show all 5 Subjects
Abstract:
... Few studies focus on the stability and the optical characteristics optimization of the nanofluid filters for photovoltaic/thermal (PV/T) systems. In this work, a propylene glycol (PG) based nanofluid filter consisting of Ag@SiO₂ nanoparticles was fabricated for both Si and GaAs solar cells and the stability was assessed. Results show that PG based Ag@SiO₂ nanofluids retain their optical properties ...
DOI:
10.1016/j.renene.2022.03.146

9. Effective Regulation of the Au Spatial Position in a Hierarchically Structured Au/HTS-1 Catalyst: To Boost the Catalytic Performance of Propene Epoxidation with H₂ and O₂

Author:
Nan Sheng; Zhaoning Song; Juncong Yuan; Wei Liang; Jinchong Zhao; Jing Zhang; Wei Xu; Bing Sun; Xiang Feng; Zhe Yang; Chaohe Yang
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.29 pp. 9515-9524
ISSN:
2168-0485
Subject:
propylene; propylene oxide,   etc   ; X-ray photoelectron spectroscopy; catalysts; catalytic activity; epoxidation reactions; green chemistry; hydrophilicity; nanogold; transmission electron microscopy; zeolites;     Show all 11 Subjects
Abstract:
... The traditional deposition–precipitation (DP) method is common but not universal in manipulating Au nanoparticles’ spatial locations in propene epoxidation catalysts, especially for hierarchical hydrophilic TS-1 supports. Directional loading of Au nanoparticles to hierarchical hydrophilic TS-1 pores is challenging because the strong hydrophilicity of the hierarchical TS-1 zeolite would make Au nan ...
DOI:
10.1021/acssuschemeng.2c02139

10. Development of advanced electrolytes in Na-ion batteries: application of the Red Moon method for molecular structure design of the SEI layer

Author:
Amine Bouibes; Norio Takenaka; Kei Kubota; Shinichi Komaba; Masataka Nagaoka
Source:
RSC advances 2022 v.12 no.2 pp. 971-984
ISSN:
2046-2069
Subject:
propylene,   etc   ; batteries; carbonates; chemical structure; electrodes; electrolytes;     Show all 6 Subjects
Abstract:
... This review aims to overview state-of-the-art progress in the collaborative work between theoretical and experimental scientists to develop advanced electrolytes for Na-ion batteries (NIBs). Recent investigations were summarized on NaPF₆ salt and fluoroethylene carbonate (FEC) additives in propylene carbonate (PC)-based electrolyte solution, as one of the best electrolytes to effectively passivate ...
DOI:
10.1039/d1ra07333h

11. Synthesis of ZIF-8 Membranes on γ-Alumina Supports for Separation of Propylene/Propane Gas Mixture

Author:
Fateme Banihashemi; Jerry Y. S. Lin
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.11 pp. 4125-4133
ISSN:
1520-5045
Subject:
propylene,   etc   ; aluminum oxide; chemistry; process design; propane;     Show all 5 Subjects
Abstract:
... Zeolitic imidazolate framework-8 (ZIF-8) membranes have shown promising potential for the separation of industrially important propylene/propane mixtures. For industrial applications, it is necessary to synthesize a thin and defect-free ZIF-8 membrane with good integrity on scalable supports. In this work, we report the synthesis of ZIF-8 membranes on the sol–gel derived mesoporous γ-alumina layer ...
DOI:
10.1021/acs.iecr.1c04986

12. Tungstacyclopentane Ring Contraction Yields Olefin Metathesis Catalysts

Author:
Maxime Boudjelel; René Riedel; Richard R. Schrock; Matthew P. Conley; Adam J. Berges; Veronica Carta
Source:
Journal of the American Chemical Society 2022 v.144 no.24 pp. 10929-10942
ISSN:
1520-5126
Subject:
propylene,   etc   ; carbon; ethylene; fluorescence; hydrogen; isomers; olefin;     Show all 7 Subjects
Abstract:
... Exposure of a solution of the square pyramidal tungstacyclopentane complex W(NAr)(OSiPh₃)₂(C₄H₈) (Ar = 2,6-i-Pr₂C₆H₃) to ethylene at 22 °C in ambient (fluorescent) light slowly leads to the formation of propylene and the square pyramidal tungstacyclobutane complex W(NAr)(OSiPh₃)₂(C₃H₆). No reaction takes place in the dark, but the reaction is >90% complete in ∼15 min under blue LED light (∼450 nm ...
DOI:
10.1021/jacs.2c03732

13. Hemicubane topological analogs of the oxygen-evolving complex of photosystem II mediating water-assisted propylene carbonate oxidation

Author:
Connor A. Koellner; Michael R. Gau; Aleksander Polyak; Manish Bayana; Michael J. Zdilla
Source:
Chemical communications 2022 v.58 no.15 pp. 2532-2535
ISSN:
1364-548X
Subject:
propylene,   etc   ; carbonates; ligands; oxidation; oxygen evolving complex; topology;     Show all 6 Subjects
Abstract:
... A series of Ca–Mn clusters with the ligand 2-pyridinemethoxide (Py-CH₂O) have been prepared with varying degrees of topological similarity to the biological oxygen-evolving complex. These clusters activate water as a substrate in the oxidative degradation of propylene carbonate, with activity correlated with topological similarity to the OEC, lowering the onset potential of the oxidation by as muc ...
DOI:
10.1039/d1cc05825h

14. High-Entropy Intermetallics Serve Ultrastable Single-Atom Pt for Propane Dehydrogenation

Author:
Yuki Nakaya; Eigo Hayashida; Hiroyuki Asakura; Satoru Takakusagi; Shunsaku Yasumura; Ken-ichi Shimizu; Shinya Furukawa
Source:
Journal of the American Chemical Society 2022 v.144 no.35 pp. 15944-15953
ISSN:
1520-5126
Subject:
propylene,   etc   ; catalysts; dehydrogenation; desorption; entropy; propane; thermal stability;     Show all 7 Subjects
Abstract:
... Propane dehydrogenation has been a promising propylene production process that can compensate for the increasing global demand for propylene. However, Pt-based catalysts with high stability at ≥600 °C have barely been reported because the catalysts typically result in short catalyst life owing to side reactions and coke formation. Herein, we report a new class of heterogeneous catalysts using high ...
DOI:
10.1021/jacs.2c01200

15. Efficient ethylene/ethane separation through ionic liquid-confined covalent organic framework membranes

Author:
Xu Liang; Hong Wu; Hongliang Huang; Xiaoyao Wang; Meidi Wang; Haozhen Dou; Guangwei He; Yanxiong Ren; Yutao Liu; Yingzhen Wu; Shaoyu Wang; Huilin Ge; Chongli Zhong; Yu Chen; Zhongyi Jiang
Source:
Journal of materials chemistry A 2022 v.10 no.10 pp. 5420-5429
ISSN:
2050-7496
Subject:
propylene,   etc   ; chemistry; ethane; ethylene; ionic liquids; propane; silver;     Show all 7 Subjects
Abstract:
... Organic framework materials, owing to the long-range ordered channels, uniform channel sizes and readily tailored functionalities, are expected to become next generation membrane materials for molecular separations. In this study, for the first time, we demonstrate the utilization of covalent organic framework (COF) membranes for efficient ethylene/ethane separation. The COF membranes are loaded a ...
DOI:
10.1039/d1ta10516g

16. Molecular Sieving of Propylene from Propane in Metal–Organic Framework-Derived Ultramicroporous Carbon Adsorbents

Author:
Fuqiang Chen; Xinglei Huang; Kaiqing Guo; Liu Yang; Haoran Sun; Wei Xia; Zhiguo Zhang; Qiwei Yang; Yiwen Yang; Dan Zhao; Qilong Ren; Zongbi Bao
Source:
ACS applied materials & interfaces 2022 v.14 no.26 pp. 30443-30453
ISSN:
1944-8252
Subject:
propylene,   etc   ; adsorbents; adsorption; carbon; distillation; polysaccharides; porosity; propane;     Show all 8 Subjects
Abstract:
... The development of adsorption-based separation processes alternative to the energy-intensive cryogenic distillation for a mixture of propylene and propane remains essential but challenging in gas industries. Molecular sieving separation of C₃H₆/C₃H₈ on stable carbon adsorbents appeals to be promising, while it is quite challenging to realize due to the random distributions and arrangements of the ...
DOI:
10.1021/acsami.2c09189

17. 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:
propylene; propylene oxide,   etc   ; activation energy; active sites; biogas; carbon; carbon dioxide; carbonates; catalysts; catalytic activity; climate change; epoxides; flue gas; topography; value added;     Show all 15 Subjects
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

18. Determining the inherent selectivity for carbon radical hydroxylation versus halogenation with high-spin oxoiron(iv)–halide complexes: a concerted rebound step

Author:
Yaping Tao; Zixian Li; Yiman Zhang; kexi Sun; Zhaojun Liu
Source:
RSC advances 2022 v.12 no.16 pp. 9891-9897
ISSN:
2046-2069
Subject:
propylene,   etc   ; carbon; density functional theory; hydrogen; hydroxylation; ligands; models;     Show all 7 Subjects
Abstract:
... A synthetic iron model can process both halogenation and hydroxylation with vague selectivity, which is different from halogenase even though these structures are used for the simulation of halogenase. The key factor of the synthetic oxo-iron model mediated hydroxylation or the halogenation is still under debate. Herein density functional theory calculation is used to investigate the hydroxylation ...
DOI:
10.1039/d2ra01384c

19. Electrochemical behavior of through-hole electrodeposition inhibitor EO-PO under periodic pulse reverse

Author:
Yuanhang Zhang; Maozhong An; Peixia Yang; Jinqiu Zhang
Source:
Colloids and surfaces 2022 v.655 pp. 130238
ISSN:
0927-7757
Subject:
propylene oxide,   etc   ; cathodes; composite polymers; electrochemistry; electroplating; ethylene oxide;     Show all 6 Subjects
Abstract:
... Uniform electrodeposition of through-hole (TH) with a high aspect ratio is the key to the reliability of printed circuit board (PCB) interconnection. Inhibitors produce stronger inhibition at high potentials during TH electrodeposition and thus reduce the difference in electrodeposition rates between inside and outside the TH. In this paper, the electrochemical behavior of an ethylene oxide propyl ...
DOI:
10.1016/j.colsurfa.2022.130238

20. Colloidal Platinum–Copper Nanocrystal Alloy Catalysts Surpass Platinum in Low-Temperature Propene Combustion

Author:
Nadia Tahsini; An-Chih Yang; Verena Streibel; Baraa Werghi; Emmett D. Goodman; Aisulu Aitbekova; Simon R. Bare; Yuejin Li; Frank Abild-Pedersen; Matteo Cargnello
Source:
Journal of the American Chemical Society 2022 v.144 no.4 pp. 1612-1621
ISSN:
1520-5126
Subject:
propylene,   etc   ; alloys; catalytic activity; combustion; nanocrystals; palladium; platinum; steam;     Show all 8 Subjects
Abstract:
... Low-temperature removal of noxious environmental emissions plays a critical role in minimizing the harmful effects of hydrocarbon fuels. Emission-control catalysts typically consist of large quantities of rare, noble metals (e.g., platinum and palladium), which are expensive and environmentally damaging metals to extract. Alloying with cheaper base metals offers the potential to boost catalytic ac ...
DOI:
10.1021/jacs.1c10248