作者:Caroline Hadad、Sylvain Achelle、Joaquín C. García-Martinez、Julián Rodríguez-López
DOI:10.1021/jo200204u
日期:2011.5.20
solvatochromic behavior depends not only on the solvent polarity but also on the hydrogen bonding parameters of the solvent. The effect of protonation was also studied, and the abilities of some of these molecules to function as colorimetric and luminescent pH sensors were demonstrated with dramatic color changes and luminescence switching upon the introduction of acid.
通过2,4-二氯-6-甲基嘧啶与2-(三丁基锡烷基)吡啶之间的双交叉偶联反应,已经有效地制备了一系列4-芳基乙烯基-2,6-二(吡啶-2-基)嘧啶,然后通过醛醇缩合与适当的芳族醛缩合,该芳族醛被给电子,吸电子,树枝状或水溶性基团取代。研究了不同质子和非质子溶剂对这些系统的光吸收和发射性质的影响。具有给电子基团的化合物显示出很强的发射溶剂致变色现象,表明形成了分子内电荷分离的发射态。溶剂变色行为不仅取决于溶剂的极性,还取决于溶剂的氢键参数。还研究了质子化的影响,