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1. Bis(stibahousene)

Author:
Lee, Vladimir Ya.; Ota, Kei; Ito, Yuki; Gapurenko, Olga A.; Sekiguchi, Akira; Minyaev, Ruslan M.; Minkin, Vladimir I.; Gornitzka, Heinz
Source:
Journal of the American Chemical Society 2017 v.139 no.39 pp. 13897-13902
ISSN:
1520-5126
Subject:
hydrocarbons
Abstract:
... Strained hydrocarbons constitute one of the most prominent classes of organic compounds. Among them, bicyclo[2.1.0]pentene (“housene”) derivatives represent a highly challenging and very attractive class. Although organic housenes have been known for more than five decades, there are still very few of them containing heavier main group elements. In this paper, we report on the two housene-type str ...
DOI:
10.1021/jacs.7b07712

2. Fractal morphology features and carbon component analysis of diesel particulates

Author:
Mei, Deqing; Zhu, Zongning; Mei, Congwei; Chen, Zong; Yuan, Yinnan
Source:
Environmental science and pollution research international 2019 v.26 no.14 pp. 14014-14023
ISSN:
0944-1344
Subject:
hydrocarbons,   etc   ; carbon; fractal dimensions; particulates; vehicles (equipment);     Show all 5 Subjects
Abstract:
... External morphology and internal carbonaceous compositions are important characteristics for the source recognition of atmospheric particulate matter (PM). The fractal dimension of morphology and carbon components of diesel PM with different sizes both at high and low load were studied through fractal theory and thermal optical reflection method. It is revealed that small-size PM absorbs more solu ...
DOI:
10.1007/s11356-019-04783-1

3. Pd(ii)-Catalyzed decarboxylative meta-C–H difluoromethylation

Author:
ZhaoThese authors contributed equally to this work., Huaxin; Ma, Guobin; Xie, Xiaojuan; Wang, Yong; Hao, Jian; Wan, Wen
Source:
Chemical communications 2019 v.55 no.27 pp. 3927-3930
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; acids; chemical reactions; palladium;     Show all 4 Subjects
Abstract:
... A palladium(ii)-catalyzed decarboxylative meta-selective C–H difluoromethylation of arenes has been developed from easily accessible difluoroacetic acids. Initial mechanistic studies disclosed that a reasonable migratory insertion is involved in this meta-C–H functionalization. ...
DOI:
10.1039/c9cc00984a

4. Dehydrogenative β-Arylation of Saturated Aldehydes Using Transient Directing Groups

Author:
Zhang, Xing-Long; Pan, Gao-Fei; Zhu, Xue-Qing; Guo, Rui-Li; Gao, Ya-Ru; Wang, Yong-Qiang
Source:
Organic letters 2019 v.21 no.8 pp. 2731-2735
ISSN:
1523-7052
Subject:
aromatic hydrocarbons,   etc   ; chemical bonding; chemical structure; dehydrogenation;     Show all 4 Subjects
Abstract:
... An unprecedented cross-dehydrogenative-coupling (CDC) reaction of saturated aldehyde β-C–H with arenes to form cinnamaldehydes via the cleavages of four C–H bonds has been developed. The reaction possesses complete E-stereoselectivity for the C═C double bond. The protocol is featured by atom and step economy, mild reaction conditions, and convenient operation. ...
DOI:
10.1021/acs.orglett.9b00695

5. A general approach to non-fullerene electron acceptors based on the corannulene motif

Author:
Barát, Viktor; Budanović, Maja; Halilovic, Dzeneta; Huh, June; Webster, Richard D.; Mahadevegowda, Surendra H.; Stuparu, Mihaiela C.
Source:
Chemical communications 2019 v.55 no.21 pp. 3113-3116
ISSN:
1364-548X
Subject:
polycyclic aromatic hydrocarbons,   etc   ; fullerene; oxidation; sulfur;     Show all 4 Subjects
Abstract:
... Here, we show that oxidation of exo-cyclic sulfur atoms enhances the molecular reduction potential of non-planar polycyclic aromatic hydrocarbons and allows for a systematic bridging of the electron affinity gap between corannulene, a fragment of fullerene C₆₀, and the prevalent fullerene-based electron acceptor phenyl-C₆₁-butyric acid methyl ester (PCBM). ...
DOI:
10.1039/c9cc00327d

6. Dynamic hydrogels mediated by macrocyclic host–guest interactions

Author:
Xiao, Tangxin; Xu, Lixiang; Zhou, Ling; Sun, Xiao-Qiang; Lin, Chen; Wang, Leyong
Source:
Journal of materials chemistry B 2019 v.7 no.10 pp. 1526-1540
ISSN:
2050-7518
Subject:
aromatic hydrocarbons,   etc   ; biocompatibility; biocompatible materials; cyclodextrins; hydrogels;     Show all 5 Subjects
Abstract:
... Hydrogels have attracted increasing research interest in recent years due to their dynamic properties and potential applications in biomaterials. Concurrently, macrocycle-based host–guest interactions have played an important role in the development of supramolecular chemistry. Recently, research towards dynamic hydrogels mediated by various macrocyclic host–guest interactions has been gradually d ...
DOI:
10.1039/c8tb02339e

7. Analytical progress and challenges for the detection of oxygenated polycyclic aromatic hydrocarbon transformation products in aqueous and soil environmental matrices: A review

Author:
Pulleyblank, Coren; Cipullo, Sabrina; Campo, Pablo; Kelleher, Brian; Coulon, Frederic
Source:
Critical reviews in environmental science and technology 2019 v.49 no.5 pp. 357-409
ISSN:
1547-6537
Subject:
polycyclic aromatic hydrocarbons,   etc   ; analytical methods; soil; toxicity;     Show all 4 Subjects
Abstract:
... Over the past 20 years, a growing body of research has raised concerns about the toxicity, fate, and transport of oxygenated transformation products of polycyclic aromatic hydrocarbons. Research targeting these diverse compounds in soil and water systems has been challenged by a lack of standard analytical techniques and suitable reference materials. However, recent efforts towards the consolidati ...
DOI:
10.1080/10643389.2018.1547622

8. Atomic-force microscopy study of self-assembled atmospheric contamination on graphene and graphite surfaces

Author:
Temiryazev, Alexei; Frolov, Alexey; Temiryazeva, Marina
Source:
Carbon 2019 v.143 pp. 30-37
ISSN:
0008-6223
Subject:
hydrocarbons,   etc   ; atomic force microscopy; graphene; laboratory experimentation;     Show all 4 Subjects
Abstract:
... By means of high resolution atomic-force microscopy (AFM) we investigated the surface of graphene and graphite. Our study shows that if the samples were stored in ambient laboratory conditions, an adsorbate of airborne contaminants, presumably hydrocarbons, forms well-ordered layer over the whole area of graphene flakes. In general case, this layer has a stripe structure of 4–5 nm pitch with domai ...
DOI:
10.1016/j.carbon.2018.10.094

9. Self-constructing giant vesicles for mimicking biomembrane fusion and acting as enzymatic catalysis microreactors

Author:
Liu, Shengda; An, Guo; Xu, Jiayun; Li, Xiumei; Wang, Tingting; Fan, Xiaotong; Hou, Chunxi; Luo, Quan; Liu, Junqiu; Han, Yanqiu
Source:
Journal of materials chemistry B 2019 v.7 no.8 pp. 1226-1229
ISSN:
2050-7518
Subject:
aromatic hydrocarbons,   etc   ; biocatalysis; cell membranes; chemical bonding;     Show all 4 Subjects
Abstract:
... Self-constructing giant fused vesicles based on hydrazone-pillar[5]arene (HP5) were formed catalytically in weak acid via the formation of dynamic covalent bonds in water. The HP5 vesicles mimicked the process of biomembrane fusion and acted as biocatalysis microreactors induced by fusion. ...
DOI:
10.1039/c8tb02875c

10. Critical Role of Achiral Guest Molecules in Planar Chirality Inversion of Alanine-Appended Pillar[5]arenes

Author:
Park, Jaehyeon; Choi, Yeonweon; Lee, Shim Sung; Jung, Jong Hwa
Source:
Organic letters 2019 v.21 no.4 pp. 1232-1236
ISSN:
1523-7052
Subject:
aromatic hydrocarbons,   etc   ; alanine; imidazoles; moieties; optical isomerism;     Show all 5 Subjects
Abstract:
... Planar chirality inversion of pillar[5]arenes bearing d- or l-alanine substituents on both rims was investigated upon addition of guest molecules having pyridinium or imidazole moieties and long alkyl chains. The d- and l-alanine-substituted pillar[5]arenes exhibited pS and pR planar chirality, respectively. However, this planar chirality was inverted upon inclusion of certain achiral molecules, c ...
DOI:
10.1021/acs.orglett.9b00277

11. Tuning of the aggregation number of Platonic micelles with a binary mixture of calix[4]arene surfactants

Author:
Lee, Ji Ha; Fujii, Shota; Takahashi, Rintaro; Sakurai, Kazuo
Source:
Chemical communications 2019 v.55 no.9 pp. 1303-1305
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; chemical reactions; micelles; surfactants;     Show all 4 Subjects
Abstract:
... The mixture ratios were used as a factor for aggregation number (Nₐgg) determination in binary mixtures of calix[4]arene surfactants. Platonic micelles having different Nₐgg were prepared by adjusting the ratio of oppositely charged compounds. ...
DOI:
10.1039/c8cc09621j

12. Hydrogenation of CO₂ into aromatics over a ZnCrOₓ–zeolite composite catalyst

Author:
Zhang, Junfeng; Zhang, Meng; Chen, Shuyao; Wang, Xiaoxing; Zhou, Zeling; Wu, Yingquan; Zhang, Tao; Yang, Guohui; Han, Yizhuo; Tan, Yisheng
Source:
Chemical communications 2019 v.55 no.7 pp. 973-976
ISSN:
1364-548X
Subject:
hydrocarbons,   etc   ; aromatic compounds; carbon dioxide; catalysts; hydrogenation;     Show all 5 Subjects
Abstract:
... A ZnCrOₓ-ZnZSM-5 composite catalyst was used for CO₂ hydrogenation into hydrocarbons especially aromatics (Aro). 81.1% Aro selectivity in C₅₊ hydrocarbons (mainly C₅–₁₁) was obtained at 320 °C, corresponding to 19.9% CO₂ conversion, 29.8% total hydrocarbons (HCₜ) selectivity and 69.7% C₅₊ selectivity in HCₜ. Our optimized STY of Aro is the highest ever reported. ...
DOI:
10.1039/c8cc09019j

13. The chiral interfaces fabricated by d/l-alanine-pillar[5]arenes for selectively adsorbing ctDNA

Author:
ZhangEqual contribution to this work., Jin; Wang, Zhenjun; Lv, Shuxin; Zeng, Xiangfei; Sun, Yao; Li, Haibing; Zhang, Ruiping
Source:
Chemical communications 2019 v.55 no.6 pp. 778-781
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; adsorption; chemical reactions; gold;     Show all 4 Subjects
Abstract:
... In this paper, the d/l-AP5-interfaces are firstly fabricated by attaching d-alanine-pillar[5]arene and l-alanine-pillar[5]arene (d/l-AP5) onto the gold surface, and they exhibit a significantly different chiral influence on the morphology and the adsorption quantity of the adsorbed ctDNA molecules. The research provides an ideal chiral platform for investigating chiral phenomena in biological syst ...
DOI:
10.1039/c8cc09696a

14. Three-dimensional supramolecular polymerization based on pillar[n]arenes (n = 5, 6) and halogen bonding interactions

Author:
Han, Chengyou; Zhao, Dezhi; Dong, Shengyi
Source:
Chemical communications 2018 v.54 no.93 pp. 13099-13102
ISSN:
1364-548X
Subject:
aromatic hydrocarbons,   etc   ; halogens; polymerization;     Show all 3 Subjects
Abstract:
... Herein we demonstrate that three dimensional supramolecular polymerization networks were constructed both in solution and in the solid state by the combination of pillar[5,6]arene-based host–guest complexes and 1,4-diiodotetrafluorobenzene involving halogen bonding systems. ...
DOI:
10.1039/c8cc07993e

15. Supramolecular Polymer-Based Fluorescent Microfibers for Switchable Optical Waveguides

Author:
Sun, Cai-Li; Gao, Zhenhua; Teng, Kun-Xu; Niu, Li-Ya; Chen, Yu-Zhe; Zhao, Yong Sheng; Yang, Qing-Zheng
Source:
ACS applied materials & interfaces 2018 v.10 no.31 pp. 26526-26532
ISSN:
1944-8252
Subject:
aromatic hydrocarbons,   etc   ; fluorescence; polymers;     Show all 3 Subjects
Abstract:
... We report the switchable optical waveguide microfibers based on fluorescent supramolecular polymer for the first time. The pillar[5]arene-based supramolecular polymeric microfibers were prepared easily from the viscous solution of bispillar[5]arene host (bisP5A) and diphenylanthracene-derived guest (GD). The resulting microfibers act as an active optical waveguide material with long propagation di ...
DOI:
10.1021/acsami.8b08490

16. Ir-Catalyzed Intramolecular Transannulation/C(sp2)–H Amination of 1,2,3,4-Tetrazoles by Electrocyclization

Author:
Das, Sandip Kumar; Roy, Satyajit; Khatua, Hillol; Chattopadhyay, Buddhadeb
Source:
Journal of the American Chemical Society 2018 v.140 no.27 pp. 8429-8433
ISSN:
1520-5126
Subject:
aromatic hydrocarbons,   etc   ; alkenes; amination;     Show all 3 Subjects
Abstract:
... An efficient strategy for the intramolecular denitrogenative transannulation/C(sp²)–H amination of 1,2,3,4-tetrazoles bearing C8-substituted arenes, heteroarenes, and alkenes is described. The process involves the generation of the metal–nitrene intermediate from tetrazole by the combination of [Cp*IrCl₂]₂ and AgSbF₆. It has been shown that the reaction proceeds via an unprecedented electrocycliza ...
DOI:
10.1021/jacs.8b05343

17. Coupling of glycerol-APR and in situ hydrodeoxygenation of fatty acid to produce hydrocarbons

Author:
Domínguez-Barroso, Vanesa; Herrera, Concepción; Larrubia, María Ángeles; Alemany, Luis J.
Source:
Fuel processing technology 2019 v.190 pp. 21-28
ISSN:
0378-3820
Subject:
hydrocarbons,   etc   ; catalysts; glycerol; hydrogen; hydrogenation; models; oleic acid;     Show all 7 Subjects
Abstract:
... Glycerol valorization by coupling APR to yield hydrogen with hydrogenation of a model compound as tandem reactions is approached using Pt-Ni/Al2O3 as efficient catalyst. Oleic acid is used as a C18 fatty acid model compound for in situ hydrogenation reaction. The combination of the two catalytic transformations to a single tandem process appears particularly interesting since this protocol reduces ...
DOI:
10.1016/j.fuproc.2019.03.011

18. Molecular insights into the initial formation of pyrolytic carbon upon carbon fiber surface

Author:
Chen, MingWei; Zhu, YinBo; Xia, Jun; Wu, HengAn
Source:
Carbon 2019 v.148 pp. 307-316
ISSN:
0008-6223
Subject:
polycyclic aromatic hydrocarbons,   etc   ; carbon; carbon fibers; microstructure; temperature;     Show all 5 Subjects
Abstract:
... Understanding the deposition process of pyrolytic carbon is essential in controlling its microstructure and consequent macroscale performance. Herein, using molecule dynamics (MD) simulations with the ReaxFF potential, we revealed the initial formation process of pyrolytic carbon near the simplified surface of carbon fiber. Three stages were identified in the deposition process, where polycyclic a ...
DOI:
10.1016/j.carbon.2019.04.003

19. The presence of nitroarenes formed by secondary atmospheric processes in the Japanese freshwater environment

Author:
Nagato, Edward G.; Hayakawa, Kazuichi
Source:
Environmental pollution 2019 v.250 pp. 554-558
ISSN:
0269-7491
Subject:
polycyclic aromatic hydrocarbons,   etc   ; automobiles; combustion; ecotoxicology; freshwater; isomers;     Show all 6 Subjects
Abstract:
... In this study, the concentrations and distributions of nitrated polycyclic aromatic hydrocarbons (NPAHs) were characterized in the freshwater environment of a Japanese city. While the NPAHs were few in number, they were found in pg/L concentrations and the specific isomers suggested the deposition of NPAHs formed via the atmospheric transformation of PAHs. The absence of NPAHs formed via primary c ...
DOI:
10.1016/j.envpol.2019.04.049

20. Multi-particle frits for packed capillary columns in electrochromatographic use

Author:
Sun, Jiannan; Yang, Shiwei; Cheng, Heyong; Wang, Yuanchao; Liu, Jinhua
Source:
Journal of chromatography 2019 v.1595 pp. 221-229
ISSN:
0021-9673
Subject:
polycyclic aromatic hydrocarbons,   etc   ; electrochromatography; mechanical properties; packaging materials; permeability; slurries;     Show all 6 Subjects
Abstract:
... Further development of capillary electrochromatography (CEC) is to some extent restricted by column technology. Packed capillary columns are most commonly used in CEC because of higher sample capacity and higher sensitivity than open tubular columns, and better reproducibility and uniformity than monolithic columns. Fritting is the core component for the fabrication of packed capillary columns. Th ...
DOI:
10.1016/j.chroma.2019.02.046