一种新型偶氮聚电解质的光致取向行为研究  

LAYER-BY-LAYER SELF-ASSEMBLY AND PHOTO-INDUCED DICHROISM OF A NOVEL SIDE-CHAIN AZO POLYELECTROLYTE

作　　者：邓永红[1] 和亚宁[1] 焉学佳[1] 漆海波[1] 王晓工[1] 

机构地区：[1]清华大学材料科学与工程研究院化工系高分子研究所,北京100084

出　　处：《高分子学报》2004年第2期299-303,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目 (基金号 5 992 5 3 0 9)

摘　　要：A novel polyelectrolyte PNANT functionalized with electron donor-acceptor type azobenzene chromophores has been synthesized through post-polymerization azo coupling reaction and characterized by 1H-NMR,FTIR and UV-Vis spectroscopy.The degree of functionalization (DF) of PNANT was 20% measured by elemental analysis.The degree of polymerization and its distribution were determined by GPC to be X n=251 with a polydispersion index 1.53.A glass transition temperature of 119℃ was observed from DSC thermogram. H-aggregation of azo chromophores of PNANT in spin-coated film and self-assembled film were detected from UV-Vis spectra,and the degree of H-aggregation of PNANT in the self-assembled film was found to be higher than that in the spin-coated film.Dichroism was optically induced in the spin-coated film and self-assembled film upon the irradiation of a polarized Ar + laser beam at 488 nm.The orientational order parameter obtained was 0.15 for spin-coated film and 0.07 for the self-assembled film.The resulting dichroism detected by UV-Vis spectra exhibited long-term stability.A novel polyelectrolyte PNANT functionalized with electron donor-acceptor type azobenzene chromophores has been synthesized through post-polymerization azo coupling reaction and characterized by H-1-NMR, FTIR and UV-Vis spectroscopy. The degree of functionalization (DF) of PNANT was 20% measured by elemental analysis. The degree of polymerization and its distribution were determined by GPC to be X-n = 251 with a polydispersion index 1.53. A glass transition temperature of 119degreesC was observed from DSC thermogram. H-aggregation of azo chromophores of PNANT in spin-coated film and self-assembled film were detected from UV-Vis spectra, and the degree of H-aggregation of PNANT in the self-assembled film was found to be higher than that in the spin-coated film. Dichroism was optically induced in the spin-coated film and self-assembled film upon the irradiation of a polarized Ar+ laser beam at 488 nm. The orientational order parameter obtained was 0.15 for spin-coated film and 0.07 for the self-assembled film. The resulting dichroism detected by UV-Vis spectra exhibited long-term stability.

关 键 词：偶氮聚电解质 光致取向行为 静电逐层自组装技术 H-聚集 聚合物薄膜 

分 类 号：O631[理学—高分子化学]