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1. Catalyst geometry dependent single-walled carbon nanotube formation from polyaromatic hydrocarbon molecule: Pt(111) surface versus Pt nanoparticle

Author:
Ziwei Xu; Feng Ding
Source:
Carbon 2023 v.201 pp. 483-490
ISSN:
0008-6223
Subject:
polycyclic aromatic hydrocarbons,   etc   ; carbon; carbon nanotubes; catalysts; dehydrogenation; energy; geometry; nanoparticles; optical isomerism;     Show all 9 Subjects
Abstract:
... The chirality controllable synthesis of single-walled carbon nanotubes (SWCNTs) by the catalytic transformation of designed large polyaromatic hydrocarbon molecules has made significant progress in recent years, but the underlying mechanism, such as the role of the catalyst, has never been revealed at the atomic level. In this study, the energy profiles of the dehydrogenation processes from the C₆ ...
DOI:
10.1016/j.carbon.2022.09.053

2. Miniaturized kapok fiber-supported liquid extraction for convenient extraction of pesticide residues in vegetable oils: Determination of organochlorine pesticides as a proof-of-concept study

Author:
Manyu Zhang; Xinmiao Bu; Xinli Xu; Bin Wang; Sen Yang; Yanbo Luo; Xia Xu; Di Chen
Source:
Talanta 2023 v.253 pp. 123982
ISSN:
0039-9140
Subject:
chlorinated hydrocarbons,   etc   ; acetonitrile; gas chromatography; hydrophobicity; kapok; lipophilicity; liquids; pesticides; standard deviation; triazoles; vegetable oil; vegetables;     Show all 12 Subjects
Abstract:
... In this paper, a miniaturized kapok fiber-supported liquid extraction (mini-KF-SLE) method was proposed for selective extraction of pesticide residues in vegetable oils. The natural kapok fiber was used as an inert oil support material based on its hydrophobic and lipophilic properties, and the extraction device was conveniently constructed by loading 15 mg of kapok fiber at the lower middle part ...
DOI:
10.1016/j.talanta.2022.123982

3. A fully water-soluble Calix[4]arene probe for fluorometric and colorimetric detection of toxic hydrosulfide and cyanide ions: Practicability in living cells and food samples

Author:
Alev Oguz; Mehmet Oguz; Ahmed Nuri Kursunlu; Mustafa Yilmaz
Source:
Food chemistry 2023 v.401 pp. 134132
ISSN:
0308-8146
Subject:
aromatic hydrocarbons,   etc   ; colorimetry; cyanides; fluorescence; fluorometry; food chemistry; food safety; human health; hydrogen sulfide; toxicity; water solubility;     Show all 11 Subjects
Abstract:
... Although hydrosulfide and cyanide anions play important roles in daily life that they are available in a lot of foods. However, their excess amounts contaminate water, land, and food and cause serious problems to human health. Herein, we introduce a water-soluble macrocyclic sensor based-on Calix[4]arene (MPI-Calix[4]) with dual response sites for fluorescence recognizing cyanide (CN–) and hydroge ...
DOI:
10.1016/j.foodchem.2022.134132

4. Vinegars inhibiting of the generation of BaP in barbecued pork sausages by decreasing the pH and free radical scavenging

Author:
Xiao-min Zhang; Chao-yang Xu; Teng Hui; Ke-zhou Cai; Hui Zhou; Cong-gui Chen; Bao-cai Xu
Source:
Food control 2023 v.145 pp. 109404
ISSN:
0956-7135
Subject:
polycyclic aromatic hydrocarbons,   etc   ; Maillard reaction; carcinogenicity; fermentation; flavonoids; flavor; food safety; free radicals; hydroxymethylfurfural; juiciness; pH; pork; sensory evaluation; vinegars;     Show all 14 Subjects
Abstract:
... Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon (PAH) that has been found in barbecued meat products and has shown carcinogenic properties in humans. The purpose of this study was to investigate the effect of vinegar (fermented vinegars and distilled vinegar) on the generation of BaP in barbecued pork sausages. The results showed that fermented vinegars and distilled vinegar could signif ...
DOI:
10.1016/j.foodcont.2022.109404

5. Simultaneous harmless ionization of CFC and resource utilization of waste solar panel through one-pot hydrothermal treatment

Author:
Yongliang Zhang; Lu Zhan; Xuehong Yuan; Zhenming Xu
Source:
Journal of hazardous materials 2023 v.441 pp. 129918
ISSN:
0304-3894
Subject:
chlorinated hydrocarbons,   etc   ; arsenic; chlorofluorocarbons; energy; environmental assessment; gallium; hazardous waste; hot water treatment; ionization; mineralization; ozonosphere; solar collectors; waste treatment;     Show all 13 Subjects
Abstract:
... Chlorofluorocarbons (CFCs), which possess the characteristics of high volatility and destroy ozone layer, are hardly disposed of through traditional methods. With a tightly closed reaction environment and high-temperature water medium, CFCs can react and generate inorganic Cl⁻ and F⁻ under subcritical water conditions, which is very useful to enhance leaching and enrich rare metals. Therefore, in ...
DOI:
10.1016/j.jhazmat.2022.129918

6. Assessment of risks, implications, and opportunities of waterborne neurotoxic pesticides

Author:
Delaram Dara; Andrei P. Drabovich
Source:
Journal of environmental sciences (China) 2023 v.125 pp. 735-741
ISSN:
1001-0742
Subject:
chlorinated hydrocarbons,   etc   ; bioaccumulation; biochemical compounds; biodegradation; bioremediation; genetic engineering; humans; mice; nervous system; neurotoxicity; organophosphorus compounds; pyrethrins; synergism; therapeutics; viability; China;     Show all 16 Subjects
Abstract:
... Pesticides are a well-known family of chemicals that have contaminated water systems globally. Four common subfamilies of pesticides include organochlorines, organophosphates, pyrethroids, and carbamate insecticides which have been shown to adversely affect the human nervous system. Studies have shown a link between pesticide exposure and decreased viability, proliferation, migration, and differen ...
DOI:
10.1016/j.jes.2022.03.033

7. Increased Antiaromaticity through Pentalene Connection in [n]Cyclo-1,5-dibenzopentalenes

Author:
Jan S. Wössner; Julia Kohn; Daniel Wassy; Mathias Hermann; Stefan Grimme; Birgit Esser
Source:
Organic letters 2022 v.24 no.4 pp. 983-988
ISSN:
1523-7052
Subject:
hydrocarbons,   etc   ; cycloparaphenylenes; energy; exhibitions;     Show all 4 Subjects
Abstract:
... Conjugated nanohoops incorporating nonalternant hydrocarbons have altered optoelectronic properties compared to [n]cycloparaphenylenes or other purely aromatic hoops. We synthesized [n]cyclo-1,5-dibenzopentalenes (n = 4, 5), in which nonalternant dibenzo[a,e]pentalenes are connected through their pentalene units. This leads to an increase in antiaromatic character and low-lying LUMO energies. Calc ...
DOI:
10.1021/acs.orglett.1c03900

8. Pillararene-containing polymers with tunable fluorescence properties based on host–guest interactions

Author:
Yue Wu; Hongyu Qin; Jun Shen; Hequn Li; Xiaotao Shan; Meiran Xie; Xiaojuan Liao
Source:
Chemical communications 2022 v.58 no.4 pp. 581-584
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; fluorescence; polymerization;     Show all 3 Subjects
Abstract:
... Linear polymers containing pillar[5]arenes as the pendant groups were designed and synthesized via a ring-opening metathesis polymerization. Such polymers could form supramolecular brush polymers and exhibited tunable fluorescence properties based on the host–guest interactions. ...
DOI:
10.1039/d1cc05962a

9. Transtion-metal-free access to 2-arylphenethylamines through aryldiazonium ion catalyzed ring-opening of aziridines with arenes

Author:
Yunqiu Feng; Menglin Huai; Tian Huang; Minghui Gao; Chuanzhou Tao
Source:
Tetrahedron letters 2022 v.102 pp. 153920
ISSN:
0040-4039
Subject:
aromatic hydrocarbons,   etc   ; aziridines; regioselectivity;     Show all 3 Subjects
Abstract:
... Aryldiazonium ions have been proven to catalyze effective cleavage of aziridines for the installation of varied aryl groups, providing access to a variety of 2-arylphenethylamines. This highly regioselective process, which can be performed at gram-scale, enjoys operational simplicity, as well as mild and metal-free conditions. ...
DOI:
10.1016/j.tetlet.2022.153920

10. Cobalt-catalyzed O-arylation of N-protected amino alcohols with arenes via cross-dehydrogenative C-O coupling strategy: Direct access to aryloxyamines

Author:
Chaoyu Wang; Wenfeng Bei; Wanting Li; Dongwei Wang; Yuqin Liu; Zile Gong; Kailin Zeng; Ruokun Feng; Xianqiang Huang; Chenze Qi
Source:
Tetrahedron letters 2022 v.106 pp. 154062
ISSN:
0040-4039
Subject:
aromatic hydrocarbons,   etc   ; amides; arylation;     Show all 3 Subjects
Abstract:
... An efficient Co(II)-catalyzed cross-dehydrogenative C-O coupling strategy for the arylation of N-protected amino alcohols, including 1,2-, 1,3- and 1,4-amino alcohols, branched amino alcohols and cyclic amino alcohols with different amides derivatives has been developed, affording a wide range of corresponding aryloxyamines compounds with excellent convertibility in moderate to good yields, which ...
DOI:
10.1016/j.tetlet.2022.154062

11. ortho-Functionalization of Pillar[5]arene: An Approach to Mono-ortho-Alkyl/Aryl-Substituted A1/A2-Dihydroxypillar[5]arene

Author:
Zhuo Wang; Yahu A. Liu; Hui Yang; Wei-Bo Hu; Ke Wen
Source:
Organic letters 2022 v.24 no.9 pp. 1822-1826
ISSN:
1523-7052
Subject:
aromatic hydrocarbons,   etc   ; methodology; quinones;     Show all 3 Subjects
Abstract:
... Despite the fact that the rim and lateral functionalizations of pillar[n]arenes have been well explored, ortho-functionalization has rarely been realized. In this work, we report a facile method of introducing a single functionality ortho to the hydroxyl group in A1/A2-dihydroxypillar[5]arene via a Grignard addition to pillar[4]arene[1]quinone followed by a dienone–phenol rearrangement. The descri ...
DOI:
10.1021/acs.orglett.2c00272

12. Highly selective recognition of the Al(ClO₄)₃ molecule by a mono-pyrene substituted thiacalix[4]arene chemosensor

Author:
Jiang-Lin Zhao; Shuguang Xuan; Kai Chen; Carl Redshaw; Yan Chen; Zongwen Jin
Source:
Chemical communications 2022 v.58 no.41 pp. 6112-6115
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; cations; fluorescence;     Show all 3 Subjects
Abstract:
... A mono-pyrene substituted thiacalix[4]arene chemosensor (TCA-Py) was successfully synthesized in satisfactory yield. Fluorescence analysis revealed that TCA-Py exhibited a high recognition selectivity toward the Al(ClO₄)₃ molecule due to the synergy between the Al³⁺ cation and ClO₄⁻ anion. This unique ability to recognise an entire inorganic molecule broadens the field of molecular recognition. ...
DOI:
10.1039/d2cc01609e

13. Noncovalently bound and mechanically interlocked systems using pillar[n]arenes

Author:
Kenichi Kato; Shixin Fa; Shunsuke Ohtani; Tan-hao Shi; Albert M. Brouwer; Tomoki Ogoshi
Source:
Chemical Society reviews 2022 v.51 no.9 pp. 3648-3687
ISSN:
1460-4744
Subject:
aromatic hydrocarbons,   etc   ; polymers; solubility;     Show all 3 Subjects
Abstract:
... Pillar[n]arenes are pillar-shaped macrocyclic compounds owing to the methylene bridges linking the para-positions of the units. Owing to their unique pillar-shaped structures, these compounds exhibit various excellent properties compared with other cyclic host molecules, such as versatile functionality using various organic synthesis techniques, substituent-dependent solubility, cavity-size-depend ...
DOI:
10.1039/d2cs00169a

14. Calix[4]arene Bridge Mononitration with tert-Butyl Nitrite: Synthesis of Bridging Chiral p-tert-Butylcalix[4]arene with a Mononitro Bridge Substituent

Author:
Ying-Hong Ma; Yu Yu; Shuai Fan; Xiao-Pu Jia; Sheng-An Tang; Shu-Qing Wang; Wei-Li Dong; Shao-Yong Li
Source:
Journal of organic chemistry 2022 v.87 no.12 pp. 7665-7672
ISSN:
1520-6904
Subject:
aromatic hydrocarbons,   etc   ; nitrites; organic chemistry;     Show all 3 Subjects
Abstract:
... To explore the reaction universality of bridge nitration, the mononitration of different p-tert-butylcalix[4]arene derivatives was executed with tert-butyl nitrite as a nitration reagent. The effects of calix[4]arene conformations, substituents on the lower rim, and reaction conditions on bridge mononitration are systematically studied. The bridge nitration of p-tert-butylcalix[4]arene derivatives ...
DOI:
10.1021/acs.joc.2c00253

15. Chromium-Catalyzed Selective Borylation of Vinyl Triflates and Unactivated Aryl Carboxylic Esters with Pinacolborane

Author:
Li Gong; Chao Li; Fangyan Yuan; Senlin Liu; Xiaoming Zeng
Source:
Organic letters 2022 v.24 no.17 pp. 3227-3231
ISSN:
1523-7052
Subject:
aromatic hydrocarbons,   etc   ; catalytic activity; chromium;     Show all 3 Subjects
Abstract:
... The use of pinacolborane to borylate abundant vinyl triflates and unactivated aryl carboxylic esters was enabled by chromium catalysis via the selective formation of vinyl and aryl boronate esters. The competing hydrided reduction or allylic borylation proceeds sluggishly or does not occur, therefore providing a selective strategy for the incorporation of boronate into olefins and arenes. Mechanis ...
DOI:
10.1021/acs.orglett.2c01015

16. Copper-Catalyzed Oxidative C–C Bond Cleavage of Alkyl-(Hetero)arenes Enabling Direct Access to Nitriles

Author:
Gaijun Xue; Fukai Xie; Hongliang Liang; Guoliang Chen; Wen Dai
Source:
Organic letters 2022 v.24 no.30 pp. 5590-5595
ISSN:
1523-7052
Subject:
aromatic hydrocarbons,   etc   ; cleavage (chemistry); nitriles;     Show all 3 Subjects
Abstract:
... The cleavage and functionalization of C–C bonds has emerged as a powerful tool for discovery of new transformations. Herein, we report a protocol that enables direct synthesis of nitriles via copper-catalyzed oxidative cleavage and cyanation of C–C bonds in a wide variety of multicarbon alkyl-substituted (hetero)arenes. Detailed mechanistic studies reveal that a tandem oxidative process is involve ...
DOI:
10.1021/acs.orglett.2c02238

17. Dynamic combinatorial libraries of a dimercapto-pillar[5]arene

Author:
Jinwen Luo; Yunlong Guo; Ping Li; Andrew C.-H. Sue; Chuyang Cheng
Source:
Chemical communications 2022 v.58 no.62 pp. 8646-8649
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; macrocyclic compounds; thiols;     Show all 3 Subjects
Abstract:
... We report the synthesis and dynamic covalent chemistry (DCvC) of an A1/A2-dimercapto-functionalized pillar[5]arene (Di-SH-P5). The introduction of thiol moieties into this macrocyclic host makes it an effective building block for making a dynamic combinatorial library (DCL), giving rise to a set of cyclic trimers with intriguing host–guest properties as the dominant constituents. ...
DOI:
10.1039/d2cc02752f

18. Gold(I)-Catalyzed Cycloisomerization–Indole Addition Cascade: Synthesis of 3(2H)-Furanone-Incorporated Unsymmetrical 3,3′- Bis(indolyl)methanes

Author:
Debojyoti Bag; Sanghapal D. Sawant
Source:
Organic letters 2022 v.24 no.27 pp. 4930-4934
ISSN:
1523-7052
Subject:
aromatic hydrocarbons,   etc   ; Lewis bases; indoles;     Show all 3 Subjects
Abstract:
... An unprecedented Au(I)-catalyzed domino intramolecular carbonyl-alkyne cyclization/indole addition strategy has been disclosed here. This generalized strategy enables the synthesis of 3(2H)-furanone-incorporated unsymmetrical bis(indolyl)methanes with generation of a stereocenter at the furanone junction from easily accessible indole-tethered ynediones. In addition, this present protocol could als ...
DOI:
10.1021/acs.orglett.2c01845

19. Pillar[5]arene-derived covalent organic materials with pre-encoded molecular recognition for targeted and synergistic cancer photo- and chemotherapy

Author:
Yang Wang; Di Wang; Jian Wang; Chenwei Wang; Jin Wang; Yue Ding; Yong Yao
Source:
Chemical communications 2022 v.58 no.11 pp. 1689-1692
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; drug therapy; porphyrins;     Show all 3 Subjects
Abstract:
... An efficient targeted and synergistic cancer photo- and chemotherapy platform was constructed from aldehyde-modified pillar[5]arene and tetra-(4-aminophenyl)porphyrin successfully. ...
DOI:
10.1039/d1cc07072j

20. Vinylogous Nitro-Haloform Reaction Enables Aromatic Amination

Author:
Claudio Monasterolo; Mauro F. A. Adamo
Source:
Organic letters 2022 v.24 no.26 pp. 4729-4733
ISSN:
1523-7052
Subject:
aromatic hydrocarbons,   etc   ; amination; catalytic activity;     Show all 3 Subjects
Abstract:
... The first example of an aromatic haloform reaction is reported, defining a conceptually new haloform-type approach to the metal-free functionalization of arenes. We demonstrated that heteroarenes bearing a vinylogous nitromethane system, via the stage of a trichloromethane derivative, could undergo aromatic amination to produce N-functionalized arenes in quantitative yields and without the need fo ...
DOI:
10.1021/acs.orglett.2c01494