Airinei Anton, Fifere Nicusor, Homocianu Mihaela, Gaina Constantin, Gaina Viorica, Simionescu Bogdan C
"Petru Poni" Institute of Macromolecular Chemistry, 41A Aleea Grigore Ghica Voda, 700487 Iasi, Romania; E-Mails:
Int J Mol Sci. 2011;12(9):6176-93. doi: 10.3390/ijms12096176. Epub 2011 Sep 21.
Novel polythioetherimides bearing azobenzene moieties were synthesized from azobismaleimides and bis-2-mercaptoethylether. Kinetics of trans-cis photoisomerization and of thermal conversion of cis to trans isomeric forms were investigated in both polymer solution and poly(methyl methacrylate) doped films using electronic absorption spectroscopy. Thermal recovery kinetics is well described by a two-exponential relation both in solution and polymer matrix, while that of low molecular weight azobismaleimide fit a first-order equation. The photoinduced cis-trans isomerization by visible light of azobenzene chromophores was examined in solution and in polymer films. The rate of photoinduced recovery was very high for azobismaleimides.
由偶氮双马来酰亚胺和双 - 2 - 巯基乙醚合成了带有偶氮苯基团的新型聚硫醚酰亚胺。使用电子吸收光谱法研究了聚合物溶液和聚甲基丙烯酸甲酯掺杂薄膜中反式 - 顺式光异构化动力学以及顺式到反式异构体形式的热转化动力学。热恢复动力学在溶液和聚合物基质中均能很好地用双指数关系描述，而低分子量偶氮双马来酰亚胺的热恢复动力学符合一级方程。研究了溶液和聚合物薄膜中偶氮苯发色团在可见光下的光致顺 - 反异构化。偶氮双马来酰亚胺的光致恢复速率非常高。
