整个结构中带有偶氮苯基团的聚（苄酯）树枝状大分子的设计、合成及光化学行为

Design, synthesis, and photochemical behavior of poly(benzyl ester) dendrimers with azobenzene groups throughout their architecture.

作者信息

Wang Shuangxi, Wang Ximeng, Li Lijuan, Advincula Rigoberto C

机构信息

Department of Chemistry, University of Alabama at Birmingham, Alabama 35294, USA.

出版信息

J Org Chem. 2004 Dec 24;69(26):9073-84. doi: 10.1021/jo0499773.

DOI:10.1021/jo0499773

PMID:15609940

Abstract

A new class of dendrons and dendrimers containing azobenzene units (bearing up to 29 azobenzene groups for four generations) were designed and synthesized with the convergent method, which uses azobenzene derivatives as monomers and benzyl ester groups as linkages leading to photoresponsive dendrons and dendrimers with azobenzene units throughout their architecture. Photochemical isomerization experiments revealed that all of the dendrons and dendrimers undergo trans-cis isomerization by irradiation and cis-trans isomerization by either irradiation or heating.

摘要

设计并采用收敛法合成了一类新型的含偶氮苯单元的树枝状分子和树枝状聚合物（四代分子最多含29个偶氮苯基团），该方法以偶氮苯衍生物为单体，苄酯基团为连接基，从而得到在整个结构中都含有偶氮苯单元的光响应性树枝状分子和树枝状聚合物。光化学异构化实验表明，所有的树枝状分子和树枝状聚合物在光照下都会发生反式-顺式异构化，在光照或加热条件下会发生顺式-反式异构化。