- Photocatalytic Selective Bromination of Electron-Rich Aromatic Compounds Using Microporous Organic Polymers with Visible Light
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Pure organic, heterogeneous, metal-free, and visible light-active photocatalysts offer a more sustainable and environmentally friendly alternative to traditional metal-based catalysts. Here we report a series of microporous organic polymers containing photoactive conjugated organic semiconductor units as heterogeneous photocatalysts for a visible-light-promoted, highly selective bromination reaction of electron-rich aromatic compounds using HBr as a bromine source and molecular oxygen as a clean oxidant. Via a simple Friedel-Crafts alkylation reaction, the microporous organic polymers were obtained by cross-linking of organic semiconductor compounds with defined valence and conduction band positions. The utilization of the simply prepared porous polymer-based photocatalytic systems opens new opportunities toward a sustainable and efficient material design for catalysis.
- Li, Run,Wang, Zi Jun,Wang, Lei,Ma, Beatriz Chiyin,Ghasimi, Saman,Lu, Hao,Landfester, Katharina,Zhang, Kai. A. I.
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p. 1113 - 1121
(2016/02/18)
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- Regioselective copper-catalyzed chlorination and bromination of arenes with O2 as the oxidant
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Electron-rich aromatic C-H bonds undergo regioselective chlorination and bromination in the presence of CuX2, LiX (X = Cl, Br) and molecular oxygen. Preliminary mechanistic insights suggest that the bromination and chlorination reactions proceed by different pathways.
- Yang, Lujuan,Lu, Zhan,Stahl, Shannon S.
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supporting information; experimental part
p. 6460 - 6462
(2010/03/04)
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- Synthesis of soluble phenyl-substituted poly(p-phenylenevinylenes) with a low content of structural defects
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The synthesis and characterization of two new soluble poly(p-phenylenevinylenes) (PPVs) are reported. The polymers are poly(2-(2′,5′-bis(octyloxy)benzene)-1,4-phenylenevinylene) (BOP-PPV) and poly(2-(2′,5′-bis(octyloxy)benzene)-5-methoxy-1,4-phenyleneviny
- Johansson, D. Mikael,Wang, Xiangjun,Johansson, Tomas,Inganaes, Olle,Yu, Gang,Srdanov, Gordana,Andersson, Mats R.
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p. 4997 - 5003
(2007/10/03)
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- Synthesis and luminescence properties of poly(p-phenylenevinylene) derivatives carrying directly attached carbazole pendants
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New organic soluble poly(p-phenylenevinylene) (PPV) derivatives (polymers 1 and 2) that carry hole-transporting carbazole pendants were synthesized and their photo- and electro-luminescence properties were studied. The first one is poly[2-(carbazol-9-yl)-
- Kim,Hong,Lee,Jin,Park,Sohn,Kim,Park
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p. 3023 - 3030
(2007/10/03)
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- Halogenation using Quaternary Ammonium Polyhalides. Part 22. Selective Bromination of Aromatic Ethers with Benzyltrimethylammonium Tribromide
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The reaction of aromatic ethers with a stoicheiometric amount of benzyltrimethylammonium tribromide in dichloromethane-methanol or acetic acid-ZnCl2 under mild conditions gave, selectively, mono-, di-, or tri-bromo-substituted aromatic ethers in quantitative yields.
- Kajigaeshi, Shoji,Moriwaki, Masayuki,Tanaka, Toshio,Fujisaki, Shizuo,Kakinami, Takaaki,Okamoto, Tsuyoshi
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p. 897 - 899
(2007/10/02)
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