Optical Properties of Some New Azo Photoisomerizable Bismaleimide Derivatives

International Journal of Molecular Sciences

Anton Airinei¹  Nicusor Fifere¹  Mihaela Homocianu¹  Constantin Gaina¹  Viorica Gaina¹ 

[1] “Petru Poni” Institute of Macromolecular Chemistry, 41A Aleea Grigore Ghica Voda, 700487 Iasi, Romania; E-Mails:

关键词: electronic absorption spectra;    azo chromophore;    bismaleimide;    photoisomerization;    thermal cis-trans relaxation;   

DOI  :  10.3390/ijms12096176

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.