Bathochromic or hypsochromic effects via the extension of conjugation: a study of stilbenoid squaraines
作者:Herbert Meier、Ralf Petermann、Jürgen Gerold
DOI:10.1039/a900888h
日期:——
In contrast to normal conjugated oligomers, the stilbenoid squaraines 3a–d do not show a convergence of VIS/NIR absorption due to the extension of conjugation; the observed bathochromic effect in the beginning of the series is followed by a hypsochromic effect; this result seems to be characteristic for stilbenoid compounds with donor–acceptor substitution.
与普通共轭低聚物不同的是,链烯类方烷 3a-d 并没有因为共轭作用的扩展而显示出 VIS/NIR 吸收的趋同性;在该系列开始时观察到的浴色效应之后出现了降色效应;这一结果似乎是供体-受体取代的链烯类化合物的特征。