Negative solovatochromism of azo dyes derived from (dialkylamino)thiazole dimers
Abstract
The first examples of negative solvatochromism in neutral azo dyes containing both strongly electron-donating bis(dialkylamino)thiazolyl and electron-withdrawing 4-(trifluoromethylsulfonyl)phenyl or 2-thiazolyl moieties are reported.