Expanded dipyrrins with electron-withdrawing substituents: broad range of absorption in the visible region |
| |
Authors: | Xu Liang Soji Shimizu Nagao Kobayashi |
| |
Affiliation: | Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan |
| |
Abstract: | Reaction of meso-aryl-substituted dipyrromethanes with tetracyanoethylene led to generation of a mono-tricyanovinyl-substituted species as well as an expanded dipyrrin analogue bearing both a dicyanomethylene and a tricyanovinyl substituent at the α-positions. These novel compounds exhibit absorption spectral features perturbed by the electron-withdrawing substituents. Unique protonation-induced spectral changes were also disclosed. |
| |
Keywords: | Dipyrrin Push&ndash pull effect Electronic absorption Functional dyes |
本文献已被 ScienceDirect 等数据库收录! |