Photophysical characteristics of polyaniline with photochromic azobenzene side groups

• 来源期刊: 中国物理（英文版）
• 关键词: polyaniline derivatives photochromic azobenzene trans-cis isomerization conductingpolymer
• 年，卷（期）: 2005,（2）
• 页码范围: 306-310
• 页数: 5页
• 语种: 英文

摘要

Photochromic characteristics and optical molecular reorientation in conducting polymer such as polyaniline derivatives containing photochromic azobenzene moieties (PAPNPAPOA) in side chain are studied. Changes in the UV-vis absorption, refractive index, thickness, contact angle and morphology of these films after irradiation of a linearly polarized light with a wavelength of 365nm are measured. The trans-cis isomerization of PAPNPAPOA is proved irreversible even after withdrawing the UV light for a long time. That the structure of main-chain attends by the trans-cis isomerization of side-chain is confirmed by the absorption and the solution colour during the UV irradiation. These effects are discussed by taking the trans-cis isomerization of azobenzene into consideration.