Photoisomerization mechanisms and photoselectivity of the stereoisomers of 1-(pyrid-n-yl),4-phenylbuta-1,3-diene
作者:G. Bartocci、G. Galiazzo、L. Latterini、E. Marri、U. Mazzucato、A. Spalletti
DOI:10.1039/b200353h
日期:2002.6.17
The positional isomers of 1-(pyrid-n-yl),4-phenylbuta-1,3-diene (n = 2, 3 and 4) have been synthesized and characterized by spectrometric techniques.All the four expected stereoisomers (EE, EZ, ZE and ZZ) were prepared for n = 2 while only three and two geometrical isomers were obtained for the positional isomers with n = 3 and 4, respectively. Their excited state properties were investigated by stationary
已经合成了 1-(pyrid-n-yl),4-phenylbuta-1,3-diene (n = 2, 3 and 4) 的位置异构体并通过光谱技术进行了表征。所有四种预期的立体异构体 (EE, EZ , ZE 和 ZZ) 是为 n = 2 制备的,而对于 n = 3 和 4 的位置异构体分别只获得了三个和两个几何异构体。通过固定和脉冲荧光技术以及激光闪光光解研究了它们的激发态特性。本文描述了直接和三重态敏化激发下的光化学行为。报道了光产物的选择性形成和绝热/绝热机制的作用,并与前一篇论文 (G. Bartocci, G. Galiazzo, U. Mazzucato 和 A. Spalletti,物理学。化学。化学。物理学, 2001, 3, 379–386)。