Specific solvatochromism of D–π-A type pyridinium dyes bearing various counter anions in halogenated solvents
作者:Yousuke Ooyama、Yuichiro Oda、Tomonobu Mizumo、Joji Ohshita
DOI:10.1016/j.tet.2012.12.033
日期:2013.2
OD1–OD4 bearing various counter anions (X−=Cl−, Br−, I−, or BPh4−) have been designed and developed to gain greater insight into the influences of the electronic structures of D–π-A type pyridinium dye on the specific solvatochromism in halogenated solvents: the intramolecular charge transfer absorption bands of the dyes OD1–OD4 in halogenated solvents show a large bathochromic shift compared with those
施主的π受体型吡啶染料OD1 - OD4各种轴承的抗衡阴离子(X - =氯- ,溴- ,我- ,或苯酚4-)已经被设计和开发更深入地了解具体的溶剂化d-π-A型吡啶鎓染料的电子结构的影响在卤化溶剂:的分子内电荷转移吸收带的染料OD1 - OD4在卤化的溶剂表示与非卤代溶剂相比,有较大的红移。这项研究表明,卤化溶剂可以显着增强D–π-A型吡啶鎓染料与软抗衡阴离子的分子内电荷转移特性,从而导致卤化溶剂中吸收带的大红移,这与增加卤-卤阴离子相互作用的能量取决于卤化溶剂中卤素原子的类型。