Six azo dyes derived from the common 2-amino-4-chloro-5-formylthiophene-3-carbonitrile unit and different aniline based couplers were synthesized by the traditional diazotization-coupling strategy. Solvatochromism has been studied for this family of donor−π−acceptor heterocyclic azo dyes. Furthermore, UV–Vis spectral comparisons (maximum absorption wavelength, molar extinction coefficient and full width at half maximum) have been made between the six new azo dyes reported in this work and four previously reported 4-nitro-4′-amino-azobenzene disperse dyes. In addition, X-ray single-crystal structure of one representative azo dye has been included, which constitutes the first structural report on azo dyes containing the 2-amino-4-chloro-5-formylthiophene-3-carbonitrile diazo component.

通过传统的重氮化偶联策略，合成了六种分别来自2-氨基-4-氯-5-甲酰基噻吩-3-甲腈单元和不同苯胺基成色剂的偶氮染料。溶剂化已经研究了这个家庭的供体π端受体杂环偶氮染料。此外，在这项工作中报道的六种新偶氮染料与先前报道的四种4-硝基-4'-氨基-偶氮苯分散体之间进行了UV-Vis光谱比较（最大吸收波长，摩尔消光系数和半峰全宽）。染料。另外，已经包括一种代表性的偶氮染料的X射线单晶结构，其构成了关于含有2-氨基-4-氯-5-甲酰基噻吩-3-甲腈重氮组分的偶氮染料的第一结构报告。