Photoisomerization and [2 + 2] photocycloaddition in bichromophoric styrylbenzoquinoline dyads with o-xylylene bridge group


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Photochemical properties of bis(styrylbenzoquinoline) dyads in which two styrylbenzoquinoline (SBQ) moieties are bridged by an o-xylylene group linked to their styryl groups via oxy- and carboxy-functional groups have been studied. Two competitive reactions, photoisomerization of the SBQ moieties and stereoselective [2 + 2] photocycloaddition (PCA) to give tetrasubstituted cyclobutane, occur under irradiation. It is assumed that PCA occurs with participation of an intramolecular excimer, in which the photochemical process of dimerization to cyclobutane dominates over the photophysical process of fluorescence, because the emission band of the excimer is not observed in an explicit form in the fluorescence spectra of dyads.

作者简介

M. Budyka

Institute of Problems of Chemical Physics

编辑信件的主要联系方式.
Email: budyka@icp.ac.ru
俄罗斯联邦, Chernogolovka, Moscow oblast, 142432

N. Potasheva

Institute of Problems of Chemical Physics

Email: budyka@icp.ac.ru
俄罗斯联邦, Chernogolovka, Moscow oblast, 142432

T. Gavrishova

Institute of Problems of Chemical Physics

Email: budyka@icp.ac.ru
俄罗斯联邦, Chernogolovka, Moscow oblast, 142432

V. Li

Institute of Problems of Chemical Physics

Email: budyka@icp.ac.ru
俄罗斯联邦, Chernogolovka, Moscow oblast, 142432

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