Band Gap Control in Conjugated Oligomers via Lewis Acids

被引：140

作者：

Welch, Gregory C.

Coffin, Robert

Peet, Jeff

Bazan, Guillermo C. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 31期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

POLYMER SOLAR-CELLS; PROTONATION; ABSORPTION; REACTIVITY; COMPLEXES; DYES;

D O I：

10.1021/ja902789w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A simple and effective strategy for optical band gap control is demonstrated through the use of a novel small acceptor/donor/acceptor molecule, 1, and group-13 Lewis acids. Chromophore 1 contains a dithienolesilole donor unit end-capped with benzo-2,1,3-thiadiazole (BT) acceptor units. Addition to 1 of stoichiometeric quantities of Lewis acids of varying strength resulted in the formation of Lewis adducts with progressively red-shifted primary charge-transfer absorption bands. These complexes have absorption spectra that approach those of known conjugated copolymers containing related units. NMR spectroscopy and X-ray diffraction studies revealed that 1 binds 2 equiv of Lewis acid via the nitrogen at the 3-position of BT.

引用

页码：10802 / +

页数：3

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