4′-aminoacetophenone and p-anisidine and coupling with varies N-alkylated aromatic amines. Characterization of the dyes was carried out by using UV–vis, FTIR and 1H NMR spectroscopic techniques. The electronic absorption spectra of dyes are determined at room temperature in fifteen solvents with different polarities. The solvent dependent maximum absorption band shifts, were investigated using dielectric constant
通过将4'-
氨基
苯乙酮和对-茴香胺重氮化并与各种N-烷基化的芳族胺偶联来制备五种偶氮
分散染料。使用UV-vis,FTIR和1 H NMR光谱技术对
染料进行表征。在室温下,在十五种极性不同的溶剂中测定
染料的电子吸收光谱。使用介电常数(ɛ),折射率(n)和Kamlet-Taft极性参数(氢键给体能力(α),氢键接受能力(β)和双极性/极化性极性标度)研究了溶剂依赖性的最大吸收带位移(π*))。在
染料的最大吸收带与溶剂极性参数之间发现可接受的一致性,尤其是对于π *。研究了
成色剂和/或重氮组分的取代基对
染料颜色的影响。还报道了酸和碱对
染料的可见光吸收最大值的影响。