Synthesis and characterizations of conjugated copolymers containing benzo[f]isoindole-1,3-dione and diketopyrrolopyrrole units
摘要:
A weak electron acceptor, 4,9-bis(5-bromothiophen-2-y1)-2-(2-ethylhexyl)-benzonsoindole-1,3-dione (BIDO) was designed and synthesized. Polymer P1 derived from BIDO and 9,9-dioctylfluorene-2,7diboronic acid bis(1,3-propanediol) ester by Suzuki cross-coupling reaction has a band gap of 2.41 eV. To expand the absorption range, a different amount of BIDO was copolymerized with a diketopyrrolopyrrole monomer to produce a series of copolymers Pa-c. The optical properties, electrochemical behavior, and energy levels of these four copolymers were investigated. The photovoltaic properties copolymers Pa-c were studied. A photovoltaic device containing P-c and [70]PCBM with a ratio of 1:2 had a power conversion efficiency of 1.17%. (C) 2013 Elsevier Ltd. All rights reserved.
A simple, practical, and efficient method for one-pot synthesis of symmetric and unsymmetrical 1,3-diarylisobenzofurans has been developed by sequential reactions of methyl 2-formylbenzoate with two identical or different aryl metal species.
Manganese dioxide mediated oxidativecleavage of 1,3-disubstituted benzo[c]furans in dichloromethane at room temperature gave good yields of 1,2-di(het)aroylbenzenes.
Synthesis and characterization of 1,3-diarylbenzo[c]selenophenes
作者:P. Amaladass、Natarajan Senthil Kumar、Arasambattu K. Mohanakrishnan
DOI:10.1016/j.tet.2008.06.002
日期:2008.8
A series of 1,3-diarylbenzo[c]selenophenes (symmetrical/unsymmetrical) have been synthesized involving a selenium transfer reaction of keto-alcohol/benzo[c]furan using Woollins reagent. The optical and electrochemical studies of these diarylbenzo[c]selenophenes are correlated with their structures.
一系列1,3- diarylbenzo的[ C ^ ]硒吩(对称/不对称)已合成涉及酮-醇/苯并[硒转移反应Ç使用Woollins试剂]呋喃。这些二芳基苯并[ c ]硒代苯的光学和电化学研究与其结构相关。
A Single-Step Synthesis of Symmetrical 1,3-Diarylisobenzofurans
A convenient single-step synthesis of various symmetrically substituted 1,3-diarylisobenzofurans from readily available 3-methoxy-3H-isobenzofuran-1-one (1a) and two equivalents of aryl Grignard reagents is described. The title compounds are obtained in medium to high isolated yields. Crude isobenzofuran has also been trapped by maleimide, furnishing pure Diels-Alder adduct almost quantitatively.
Oxidative Ring Opening of 1,3-Diarylbenzo[c]heterocycles Using m-CPBA: Preparation of 1,2-Diaroylbenzenes
作者:Meganathan Nandakumar、Ramakrishnan Sivasakthikumaran、Arasambattu K. Mohanakrishnan
DOI:10.1002/ejoc.201200311
日期:2012.7
An unprecedented oxidative cleavage of benzo[c]heterocyclesusingm-CPBA is reported. The reaction of 1,3-diaryl benzo[c]heterocycles with m-CPBA (meta-chloroperoxybenzoic acid) at room temperature for 5 min led to the formation of 1,2-diaroylbenzenes in good to excellent yields.