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1. With metal or not? a computationally predicted rule for a dirhodium catalyst in [3+3] cycloadditions of triazole with thiirane

Author:
Wei, Donghui,   et al.   ; Li, Shi-Jun; Li, Xue; Mo, Huilin; Qu, Ling-Bo; Lan, Yu;     Show all 6 Authors
Source:
Chemical communications 2020 v.56 no.34 pp. 4732-4735
ISSN:
1364-548X
Subject:
catalysts; catalytic activity; chemical bonding; cycloaddition reactions; density functional theory; triazoles
Abstract:
... A mixture of pathways including the use of catalyst was proposed for a dirhodium-mediated triazole activation–cycloaddition. This proposal was supported by the results of density functional theory (DFT) calculations, and was indicated to involve a non-catalyzed cleavage of the triazole N–N bond followed by a dirhodium-assisted denitrogenation. Electron-deficient carboxylates were found to be favou ...
DOI:
10.1039/d0cc01293a

2. Charge distribution and conformational stability effects of organic structure-directing agents on zeolite synthesis

Author:
Jo, Donghui,   et al.   ; Hong, Suk Bong;     Show all 2 Author
Source:
Chemical communications 2018 v.54 no.5 pp. 487-490
ISSN:
1364-548X
Subject:
aromatic compounds; chemical reactions; crystallization; geometry; heterocyclic compounds; nitrogen; zeolites
Abstract:
... While the use of the so-called organic structure-directing agents (OSDAs) is no stranger to zeolite synthesis at all, the effects of their charge distribution and conformational stability on the phase selectivity of the crystallization remain elusive. To systematically investigate these effects, we have prepared a series of imidazolium and pyrazolium derivatives with the same geometric shape but d ...
DOI:
10.1039/c7cc08818c

3. Correction: Unravelling a general mechanism of converting ionic B/N complexes into neutral B/N analogues of alkanes: Hᵟ⁺⋯Hᵟ⁻ dihydrogen bonding assisted dehydrogenation

Author:
Wei, Donghui,   et al.   ; Chen, Xi-Meng; Liu, Si-Cong; Xu, Cong-Qiao; Jing, Yi; Li, Jun; Chen, Xuenian;     Show all 7 Authors
Source:
Chemical communications 2019 v.55 no.86 pp. 13015
ISSN:
1364-548X
Subject:
alkanes; dehydrogenation
Abstract:
... Correction for ‘Unravelling a general mechanism of converting ionic B/N complexes into neutral B/N analogues of alkanes: Hᵟ⁺⋯Hᵟ⁻ dihydrogen bonding assisted dehydrogenation’ by Xi-Meng Chen et al., Chem. Commun., 2019, 55, 12239–12242. ...
DOI:
10.1039/c9cc90448d

4. Unravelling a general mechanism of converting ionic B/N complexes into neutral B/N analogues of alkanes: Hᵟ⁺⋯Hᵟ– dihydrogen bonding assisted dehydrogenation

Author:
Wei, Donghui,   et al.   ; Chen, Xi-Meng; Liu, Si-Cong; Xu, Cong-Qiao; Jing, Yi; Li, Jun; Chen, Xuenian;     Show all 7 Authors
Source:
Chemical communications 2019 v.55 no.81 pp. 12239-12242
ISSN:
1364-548X
Subject:
ammonium; butanes; dehydrogenation; moieties
Abstract:
... Long-sought mechanisms for the conversion of diammoniate of diborane ([NH₃BH₂NH₃]⁺[BH₄]⁻) into NH₃BH₃ and [NH₂BH₂]ₙ as well as ammonium aminodiborane ([NH₄]⁺[BH₃NH₂BH₃]⁻) into a butane analogue, NH₃BH₂NH₂BH₃, have been elucidated on the basis of extensive experimental and theoretical studies. The [NH₄]⁺ ammonium cation and the (η²-H₂)BH₂R moiety are found to be critical in B/N chain expansion. ...
DOI:
10.1039/c9cc07133d

5. Unique structural micro-adjustments in a new benzothiadiazole-derived Zn(ii) metal organic framework via simple photochemical decarboxylation

Author:
Wei, Donghui,   et al.   ; Han, Xiao; Cheng, Qing; Meng, Xiangru; Shao, Zhichao; Ma, Ke; Ding, Jie; Hou, Hongwei;     Show all 8 Authors
Source:
Chemical communications 2017 v.53 no.74 pp. 10314-10317
ISSN:
1364-548X
Subject:
adsorption; ammonia; carboxylic acids; coordination polymers; decarboxylation; ligands; nitrogen; photochemistry; zinc
Abstract:
... The first example of micro-adjustments of a metal organic framework (MOF) structure was observed in a new Zn(ii) MOF (Zn-BTDC-M1) derived from a benzothiadiazole-4,7-dicarboxylic acid (H₂BTDC) ligand using a light-driven decarboxylation process. Interestingly, such decarboxylation occurs at the non-chelated wing of the ligand, which induced a change in the capability of the MOF for physical N₂ ads ...
DOI:
10.1039/c7cc06125k

6. Direct regioselective phosphonation of heteroaryl N-oxides with H-phosphonates under metal and external oxidant free conditions

Author:
Wei, Donghui,   et al.   ; Wang, Hui; Cui, Xiuling; Pei, Yu; Zhang, Qianqian; Bai, Jie; Wu, Yangjie;     Show all 7 Authors
Source:
Chemical communications 2014 v.50 no.92 pp. 14409-14411
ISSN:
1364-548X
Subject:
chemical reactions; heterocyclic compounds; nitrogen oxides; oxidants; phosphonates; regioselectivity
Abstract:
... A direct C–H/P–H functionalization of heteroaryl N-oxides with H-phosphonates is described. A wide variety of heteroaryl phosphonates were obtained in up to 92% yield in a chemo- and regioselective manner, under oxidant and metal free conditions. This procedure features practicality, high efficiency, environmental friendliness and atom economy. ...
DOI:
10.1039/c4cc07060g

7. Facile preparation and ultra-microporous structure of melamine–resorcinol–formaldehyde polymeric microspheres

Author:
Long, Donghui,   et al.   ; Zhou, Huanhuan; Xu, Sheng; Su, Haiping; Wang, Mei; Qiao, Wenming; Ling, Licheng;     Show all 7 Authors
Source:
Chemical communications 2013 v.49 no.36 pp. 3763-3765
ISSN:
1364-548X
Subject:
adsorption; carbon dioxide; chemical communication; chemical composition; chemical reactions; hot water treatment; microparticles; polymers; porous media; surface area
Abstract:
... A facile hydrothermal method was developed to synthesize nitrogen-rich phenolic microspheres with a tunable ultra-microporous structure for CO₂ adsorption. The results highlighted that chemical composition and ultramicroporous size, much more than surface area, dictated the CO₂ uptake in a microporous organic polymer. ...
DOI:
10.1039/c3cc41109e

8. Insulated donor–π–acceptor systems based on fluorene-phosphine oxide hybrids for non-doped deep-blue electroluminescent devices

Author:
Yu, Donghui,   et al.   ; Zhao, Fangchao; Zhang, Zhen; Han, Chunmiao; Xu, Hui; Li, Jing; Ma, Dongge; Yan, Pengfei;     Show all 8 Authors
Source:
Chemical communications 2012 v.48 no.49 pp. 6157-6159
ISSN:
1364-548X
Subject:
chemical communication; chemical reactions; oxides
Abstract:
... An ambipolar ternary deep-blue emitter with CIE coordinates of (0.15, 0.07) and high electroluminescent performance was constructed on the basis of an insulated donor–π–acceptor system through an indirect linkage. ...
DOI:
10.1039/c2cc31066j

9. Partially unzipped carbon nanotubes as a superior catalyst support for PEM fuel cells

Author:
Long, Donghui,   et al.   ; Li, Wei; Qiao, Wenming; Miyawaki, Jin; Yoon, Seong-Ho; Mochida, Isao; Ling, Licheng;     Show all 7 Authors
Source:
Chemical communications 2011 v.47 no.33 pp. 9429-9431
ISSN:
1364-548X
Subject:
carbon nanotubes; catalysts; catalytic activity; chemical communication; chemical compounds; electrochemistry; fuel cells; graphene; oxidation; thermal expansion
Abstract:
... Partially unzipped carbon nanotubes prepared by strong oxidation and thermal expansion of carbon nanotubes were explored as an advanced catalyst support for PEM fuel cells. The unique hybrid structure of 1D nanotube and 2D double-side graphene resulted in an outstanding electrocatalytic performance. ...
DOI:
10.1039/c1cc13488d

10. Highly enantioselective yttrium(iii)-catalyzed Friedel–Crafts alkylation of β-trichloro(trifluoro)methyl aryl enones with indoles

Author:
Chen, Donghui,   et al.   ; Wang, Wentao; Lian, Xiangjin; Liu, Xiaohua; Lin, Lili; Feng, Xiaoming;     Show all 6 Authors
Source:
Chemical communications 2011 v.47 no.27 pp. 7821-7823
ISSN:
1364-548X
Subject:
alkylation; aromatic compounds; carbon; catalytic activity; chemical communication; enantioselectivity; indoles; moieties; yttrium
Abstract:
... An efficient yttrium(iii)-catalyzed highly enantioselective Friedel–Crafts alkylation of β-trichloro(trifluoro)methyl aryl enones is described. The reaction delivered a series of functionalized indoles with a chiral tertiary carbon center bearing a trichloro(trifluoro)methyl group in excellent results (up to 96% ee and 99% yield) under mild conditions. ...
DOI:
10.1039/c1cc12306h

11. Preparation and characterization of an ultrathin carbon shell coating a silver core for shell-isolated nanoparticle-enhanced Raman spectroscopy

Author:
Yang, Donghui,   et al.   ; Xia, Lixin; Zhao, Hongping; Hu, Xinhu; Liu, Yuan; Li, Jushi; Wan, Xiaofang;     Show all 7 Authors
Source:
Chemical communications 2011 v.47 no.20 pp. 5873-5875
ISSN:
1364-548X
Subject:
Raman spectroscopy; adsorption; aluminum oxide; biocompatibility; carbon; carbonization; coatings; nanosilver; silica; silver
Abstract:
... A well-designed type of ultrathin carbon shell coating a silver core was prepared for the first time through an alternate adsorption and carbonization method. The obtained ultrathin carbon shell shows prominent advantages, including sufficient uniformity, better chemical stability than silica or alumina, biocompatibility, being free of pin-holes and low cost. ...
DOI:
10.1039/c0cc05749e

12. Three-dimensional mesoporous carbon aerogels: ideal catalyst supports for enhanced H₂S oxidation

Author:
Long, Donghui,   et al.   ; Chen, Qingjun; Qiao, Wenming; Zhan, Liang; Liang, Xiaoyi; Ling, Licheng;     Show all 6 Authors
Source:
Chemical communications 2009 no.26 pp. 3898-3900
ISSN:
1364-548X
Subject:
aerogels; carbon; catalysts; chemical communication; hydrogen sulfide; oxidation; porous media; sulfur
Abstract:
... Impregnated mesoporous carbon aerogels serve as novel catalysts for the first time with respect to low-temperature oxidation of H₂S to elemental sulfur, and exhibit particularly high activity (up to 3 g sulfur per gram of catalyst) and high selectivity. ...
DOI:
10.1039/b900808j

13. Suspension assisted synthesis of triblock copolymer-templated ordered mesoporous carbon spheres with controlled particle size

Author:
Long, Donghui,   et al.   ; Lu, Feng; Zhang, Rui; Qiao, Wenming; Zhan, Liang; Liang, Xiaoyi; Ling, Licheng;     Show all 7 Authors
Source:
Chemical communications 2008 no.23 pp. 2647-2649
ISSN:
1364-548X
Subject:
carbon; chemical compounds; chemical reactions; emulsions; evaporation; particle size; porous media
Abstract:
... A general strategy in terms of large-scale and shape-controlled synthesis was used to design highly ordered mesoporous carbon spheres with controlled size from 50 to 500 μm by an evaporation induced organic–organic self-assembly inside ethanol-in-oil emulsions. ...
DOI:
10.1039/b804957b