Hetarylazoindoles 2. Spectroscopic and structural investigation of new benzothiazolylazo indole dyes
作者:Zeynel Seferoğlu、Filiz Betül Kaynak、Nermin Ertan、Süheyla Özbey
DOI:10.1016/j.molstruc.2013.04.020
日期:2013.9
Abstract Synthesis of new benzothiazolylazo indole dyes were carried out by diazotization of 2-aminobenzothiazole, 6- and 5,6-disubstituted 2-aminobenzothiazoles using with nitrosyl sulfuric acid and coupling with various 2- and 1,2-disubstituted indole derivatives. The structures of the dyes were characterized by UV–vis, FT-IR, 1 H NMR, mass spectroscopic techniques and elemental analysis. Their solvatochromic
摘要 采用亚硝酰硫酸对2-氨基苯并噻唑、6-和5,6-二取代2-氨基苯并噻唑进行重氮化,并与各种2-和1,2-二取代吲哚衍生物偶联,合成了新型苯并噻唑并吲哚染料。染料的结构通过UV-vis、FT-IR、1 H NMR、质谱技术和元素分析表征。研究了它们在不同溶剂中的溶剂化变色性质,发现它们的吸收光谱与溶剂有关。偶氮腙互变异构现象与溶剂和取代基效应有关。此外,还评估了酸碱对这种平衡的影响。为了确定所制备的染料在固态下的互变异构形式,在不同溶剂中记录了 2-甲基-3-(6-甲氧基苯并噻唑-2-基二氮烯基)-1H-吲哚的X-射线数据。X-射线结果表明染料在固态时作为偶氮互变异构体是稳定的。