Photochromism of Diarylethenes Linked by Hydrogen Bonds in the Single-Crystalline Phase
作者:Satoshi Yamamoto、Kenji Matsuda、Masahiro Irie
DOI:10.1002/chem.200304947
日期:2003.10.17
Photochromic diarylethenes, which bear carboxyl groups at the ortho, meta, or para positions of both terminal phenyl groups, have been synthesized. The diarylethenes adopt linear chain structures as a result of hydrogen bonding in the crystalline phase, and the crystals exhibit photochromic properties. The absorption maximum of the photogenerated closed-ring isomer of the para-substituted derivative
已经合成了在两个末端苯基的邻位,间位或对位带有羧基的光致变色二硫杂环丁烷。由于在结晶相中氢键的结合,二芳硫醚采用线性链结构,并且晶体表现出光致变色特性。与邻位取代的衍生物相比,对位取代的衍生物的光生闭环异构体的最大吸收显示出80nm的红移。间位取代的衍生物的最大闭环异构体位于对位取代基和邻位取代的衍生物之间。这种变化可归因于衍生物之间构象的差异,这是由氢键链施加的限制引起的。