phenylazo indole dyes was synthesized and the structures of the dyes were confirmed by UV–vis, FT-IR, HRMS and 1H/13C NMR spectroscopic techniques. Five of these dyes (I, I′, II′, III and III′) were also characterized in solid state by using single crystal X-ray diffraction studies besides other spectroscopic techniques. The geometries of the azo and hydrazone tautomeric forms of the dyes were optimized
摘要 合成了两个新系列的苯基偶氮吲哚染料,并通过紫外-可见光、红外光谱、高光谱和1H/13C NMR光谱技术确认了染料的结构。除了其他光谱技术外,还通过使用单晶 X 射线衍射研究在固态下表征了其中的五种染料(I、I'、II'、III 和 III')。染料的偶氮和腙互变异构形式的几何形状通过使用密度泛函理论 (DFT) 进行优化。此外,还通过实验和理论评估了供体和受体基团对染料偶氮和腙形式的影响。结果表明,以2-苯基吲哚为偶联组分的苯基偶氮吲哚染料在溶液、气相和固态中均以偶氮形式存在。