Extending the π-system of inverted solvatochromic phenolate-based dyes shifts their inversion point due to an increment in their sensitivity to solvent polarizability
作者:Ignacio Aburto、Marcel Muñoz、Matías Vidal、Carolina Aliaga、Moisés Domínguez
DOI:10.1016/j.molliq.2022.120784
日期:2022.12
Two pairs of phenolate-based dyes with a π-connecting system of different lengths were synthesized, and their spectral variations were investigated in pure solvents of variable polarity and methanol-dichloromethane solvent mixtures. All the dyes studied exhibited inverted solvatochromism, and multiparametric analysis of their solvatochromic absorption bands of these dyes revealed that the solvent acidity
合成了两对具有不同长度的 π 连接系统的酚盐染料,并研究了它们在可变极性的纯溶剂和甲醇-二氯甲烷溶剂混合物中的光谱变化。所有研究的染料都表现出反向溶剂化显色现象,对这些染料的溶剂化显色吸收带的多参数分析表明,溶剂酸度和极化率是造成这种行为的主要原因。π-连接系统的扩展带来了染料表现出的光谱行为向更短波长的转变,同时由于溶剂能力的增加,它们的溶剂化变色反转发生的位置向更高的溶剂极性移动。扩展染料以感知溶剂极化率,