Synthesis and Properties of Unsymmetrical Indamine Dyes Derived from 2,2′-Bis(dialkylamino)-4,5′-bithiazoles
作者:Jae Joon Kim、Kazumasa Funabiki、Hiroshige Muramatsu、Hisayoshi Shiozaki、Masaki Matsui
DOI:10.1246/bcsj.75.575
日期:2002.3
Unsymmetrical indamine dyes have been synthesized by the reaction of 2,2′-bis(dialkylamino)-4,5′-bithiazoles with 4-nitrosoanilines followed by heating with metal salts. The first UV/vis absorption bands of indamine dyes were observed at λ = 648–725 (e = 3900–55000) nm in dichloromethane, being more bathochromic than those of the corresponding cyanine derivatives. The chromophoric system for these
通过 2,2'-双(二烷基氨基)-4,5'-联噻唑与 4-亚硝基苯胺反应,然后与金属盐一起加热,合成了不对称茚满染料。在二氯甲烷中的 λ = 648-725 (e = 3900-55000) nm 处观察到茚茚染料的第一个 UV/vis 吸收带,比相应的花青衍生物更红。这些茚满染料的发色系统被描述为来自联噻唑基部分内部交替发色团的 π-π* 跃迁和从苯胺基残基到联噻唑基部分的分子内电荷转移跃迁的混合物。对于这些茚满染料,已观察到负溶剂化和卤化变色。