Symmetrical and unsymmetrical donor–acceptor–donor organic dyes: Design, synthesis and characterization. Engineering panchromic absorbance
作者:Akhil Gupta、Abdelselam Ali、Ante Bilic、Th Birendra Singh、Richard A. Evans
DOI:10.1016/j.dyepig.2014.04.008
日期:2014.9
central acceptor were made. The central acceptors were dicyanovinylidene and 1,3-diethylthiobarbituric acid derivatives of 2-indanone in the set of symmetrical dyes and dicyanovinylidene in unsymmetrical dyes. The different acceptors allowed the tuning of optoelectronic properties. All the new materials were soluble in variety of organic solvents, such as chloroform, toluene and chlorobenzene. With
已经设计,合成和表征了一系列基于施主-受主-施主(D–A–D)图案的四种新型有机半导体材料,以了解对称/不对称和受体强度的影响。在这种策略中,两种对称染料在中心受体的两端带有2-(1,3,3-三甲基吲哚-2-亚乙基)乙醛衍生的供体,而两种基于2-(1,3,3-三甲基吲哚-在中心受体的一端制备了2-亚丙基)乙醛衍生的供体,在另一端制备了一个低聚噻吩的供体。中心接受体是对称染料组中的2-茚满酮的二氰基亚乙烯基和1,3-二乙基硫代巴比妥酸衍生物,而在不对称染料中是二氰基亚乙烯基。不同的受体允许调节光电特性。所有新材料都可溶于多种有机溶剂,例如氯仿,甲苯和氯苯。随着受体强度的增加,最长波长吸收最大值的波长以及各自的消光系数增加,这导致带隙减小。对称分子给出相对窄的强初级吸收率,而非对称分子给出较弱但跨越整个可见光区域的双峰或非常宽的吸收峰,以提供全色吸收。