含杂原子A-D-A型共轭分子的合成及性质研究
Synthesis and Properties of Moleculer hetero atom A-D-A Conjugate
摘 要
众多文献报道证明，苯并噻二唑（BT）是属于n-型含氮杂环缺电子结构，易制备，较稳定，因此常被用作电荷传输材料。含氮的杂芳环由于其缺电子性质，常常与富电子基团结合形成经典的D-A型推拉电子结构的聚合物或者小分子，增加pi;电子离域，使得光谱吸收向近红外偏移，减小该材料的带隙。基于苯并噻二唑与硅杂环戊并二噻吩的聚合物与共轭小分子都表现出良好的光电性能。鉴于如此的丰富成果，本章设计并利用Stille偶联合成了一系列基于苯并噻二唑与硅杂环戊并二噻吩的A-D-A型的有机共轭小分子S1、S2和S3，如图2.1，通过研究苯并噻二唑的5、6位的氟取代对有机共轭小分子性能的影响。
图2.1 目标分子S1、S2和S3的结构示意图
Abstract
Numerous literature proved benzothiadiazole (BT) is part of n- type electron-deficient nitrogen-containing heterocyclic structure, easy production, and more stable, so it is often used as the charge transport material. A nitrogen-containing heteroaromatic ring due to its lack of electronic properties, often with electron-rich groups combine to form a polymer or a small molecule classic D-A push-pull electronic structure, increasing the pi; electron delocalization, so that the near-infrared absorption spectrum shifted Save the small bandgap of the material. Based benzothiadiazole amyl and two silicon-heterocyclic thiophene polymer conjugated small molecules exhibit good optical and electrical properties. Given such a fruitful chapter design and use Stille coupling joint has become a series based on benzothiadiazole silicon heterocyclic amyl and two thiophene A-D-A type organic small molecule conjugate S1, S2 and S3, as shown in Figure 2.1, substitution on conjugated organic small molecules by studying properties of 5,6-benzothiadiazole bit of fluorine.
关键词：苯并噻二唑； 硅杂环； stille偶联；有机共轭小分子
Keyword: Benzothiadiazole； Silole； Stille；Organic conjugate small molecule
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