Synthesis and properties of acceptor-donor-acceptor molecules based on oligothiophenes with tunable and low band gap
Synthesis and properties of acceptor-donor-acceptor molecules based on oligothiophenes with tunable and low band gap
复制标题
基于低带隙可调低聚噻吩的受体-供体-受体分子的合成与性能
DOI：
10.1016/j.tet.2009.04.089
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发表时间：
2009-07-04
期刊：
影响因子：
2.1
通讯作者：
Chen, Yongsheng
中科院分区：
文献类型：
--
作者：
Liu, Yongsheng;Zhou, Jiaoyan;Chen, Yongsheng
合成了一系列低带隙噻吩低聚物受体-供体-受体分子（DCN 3 T、DCN 5 T和DCN 7 T）。溶液的紫外-可见吸收光谱表明，电子接受基团的引入导致吸收起始向更长的波长移动。此外，它们的薄膜的光谱表现出大的红移和加宽的光谱相对于溶液中的光谱。这些A-D-A分子薄膜的光学带隙分别为1.90、1.74和1.68 eV。循环伏安法表明，所有这些化合物都呈现出可逆的第一氧化过程，其电位随着寡聚噻吩核的延长而降低。电化学带隙分别为2.14、1.88和1.71 eV。(C)2009爱思唯尔有限公司保留所有权利。
A series of acceptor-donor-acceptor molecules (DCN3T, DCN5T and DCN7T) based on oligothiophenes with low band gap are synthesized. The UV-vis absorption spectra of solution show that the introduction of electron-accepting groups results in a shift of the absorption onset towards longer wavelengths. Moreover, the optical spectra of their films show a large bathochromic shift and broadening of the bands with respect to the spectra in solution. The optical band gaps of film of these A-D-A molecules are 1.90, 1.74 and 1.68 eV, respectively. Cyclic voltammetry shows that all these compounds present a reversible first oxidation process whose potential decreases with the lengthening of oligothiophene cores. Electrochemical band gaps are 2.14, 1.88 and 1.71 eV, respectively. (C) 2009 Elsevier Ltd. All rights reserved.