SYNTHESIS AND PROPERTIES OF A NEW AZOBENZENE SIDE-CHAIN POLYMER CONTAINING A TEMPO RADICAL

• Published in: Chinese journal of polymer science Vol. 20; no. 4; pp. 285 - 290
• Main Author: Yong Zhang Ze-da Xu Xing-he Fan Xiao-fang Chen Xin-hua Wan Qi-feng Zhou
• Format: Journal Article
• Language: English
• Published: Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China 01.07.2002
• Subjects: Azobenzene; conjugatedresponses; magnetic; materials; nitroxide; Optical; organic; phase; Photo-active; polymer; radical; Photo-active organic magnetic materials; Azobenzene nitroxide radical polymer; Optical phase conjugatedresponses
• ISSN: 0256-7679; 1439-6203
• DOI: 10.3321/j.issn:0256-7679.2002.04.001

To allow anisotropies of optical properties in a magnetic field, nitroxide radical is introduced into the ortho-position of the phenylene ring in the side chain. A new azobenzene side-chain polymer (TEMPO-PAZ) containing TEMPOradical was synthesized. The polymer has a good solubility in organic solvents. The ESR spectrum of the polymer indicatedthree absorption lines characteristic of TEMPO radical. The optical phase conjugated responses (I4) of the polymer filmswere investigated by degenerate four-wave mixing (DFWM). The experimental results showed that optical phase conjugatedresponse of the TEMPO-PAZ could be easily controlled by choosing the appropriate direction of magnetic field presumablydue to the nitroxide radical in the TEMPO-PAZ molecular structure. For the polymer investigated here, the nitroxide radicalwas introduced to increase optical phase conjugated response intensity in a magnetic field, aiming originally at searching fora new photo-active organic magnetic multifunctional materials.