Systematic Variation of Cyanobuta-1,3-dienes and Expanded Tetracyanoquinodimethane Analogues as Electron Acceptors in Photoactive, Rigid Porphyrin Conjugates
作者:Lorenz M. Urner、Michael Sekita、Nils Trapp、W. Bernd Schweizer、Michael Wörle、Jean-Paul Gisselbrecht、Corinne Boudon、Dirk M. Guldi、François Diederich
DOI:10.1002/ejoc.201403252
日期:2015.1
We report on a homologous series of nine electron donor–acceptor systems featuring push–pull chromophores as electronacceptors, which are accessible by a cycloaddition-retroelectrocyclization (CA-RE) reaction. The conjugates comprise a ZnII porphyrin as electron donor, which is connected through either a rigid phenylene-ethynylene-phenylene (PEP)-bicyclo[2.2.2]octane or a PEP-trans-decahydroquinoline
Sizeable red-shift of absorption and fluorescence of subporphyrazine induced by peripheral push and pull substitution
作者:Xu Liang、Soji Shimizu、Nagao Kobayashi
DOI:10.1039/c4cc05943c
日期:——
Peripheral substitution with electron-donating (push) and electron-withdrawing (pull) substituents caused a sizeable red-shift of the Q band absorption and fluorescence of subporphyrazine, and the red-shift was controlled by the push substituents. Control of the chromophoresymmetry and inherent molecular chirality arising from the pattern of substitution were also investigated.