EFFECT OF THE NATURE OF THE AROMATIC-GROUPS ON THE LOWEST EXCITED-STATES OF TRANS-1,2-DIARYLETHENES

被引:49
作者
BARTOCCI, G
MAZZUCATO, U
SPALLETTI, A
ORLANDI, G
POGGI, G
机构
[1] UNIV PERUGIA,DIPARTIMENTO CHIM,I-06100 PERUGIA,ITALY
[2] UNIV BOLOGNA,DIPARTIMENTO CHIM G CIAMICIAN,I-40126 BOLOGNA,ITALY
来源
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1992年 / 88卷 / 21期
关键词
D O I
10.1039/ft9928803139
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The photophysical and photochemical behaviour of a series of diarylethenes has been investigated experimentally. For the same compounds the potential-energy curves of trans --> cis photoisomerisations and the ethenic bond orders in the S1 and T1 states have been calculated. The purpose of the study is to assess which properties of the aryls govern the photophysical behaviour of the diarylethenes. It is found that the relative energies of the L(a) and L(b) states of the larger aryl with respect to the ethene B(u) state determine to a large extent the photophysical and photochemical properties of the diarylethenes.
引用
收藏
页码:3139 / 3144
页数:6
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