含1,3,4-噻二唑和偶氮苯聚酰胺的合成及其光学性能  

Synthesis and Optical Properties of Polyamide Containing 1,3,4-Thiadiazole and Azobenzene

作　　者：齐程远[1] 于世钧[1] 王红[1] 王赫麟[1] 靳奇峰[1] 

机构地区：[1]辽宁师范大学化学化工学院,大连116029

出　　处：《应用化学》2012年第11期1240-1245,共6页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20973088);辽宁省教育厅科学研究基金(2009A392)资助项目

摘　　要：合成了同时含有偶氮苯和1,3,4-噻二唑的新型聚酰胺(P1,P2),采用FT-IR、1H NMR、GPC和TGA技术对其结构进行了表征和热性能测试。P1和P2的特性粘数分别为0.14和0.12 dL/g,质均相对分子质量Mw和相对分子质量分布指数PDI分别为28.8、24.8 kg/mol和1.71、1.74,质量损失5%的温度分别为320和322℃。长烷氧基侧链的引入改善了聚合物在氯仿和四氢呋喃等有机溶剂中的溶解性。采用紫外-可见吸收光谱、荧光光谱对聚合物的光学性能进行了研究。结果表明,在365 nm紫外光照射下,聚合物中偶氮苯发生反-顺异构化,P1和P2光稳态时顺式异构体比例分别为86.8%和77.4%,反-顺异构化效率分别为82.7%和73.7%。在366和363 nm光激发下,P1和P2的固体分别在418和425 nm处紫光波长范围内发射荧光。Two polyamides（P1,P2） containing both azobenzene and 1,3,4-thiadiazole were synthesized.Their structures and properties are characterized by FT-IR,1H NMR,GPC and TGA.The intrinsic viscosity of P1 and P2 are 0.14 dL/g and 0.12 dL/g,the Mw and polydispersity index（PDI） of P1 and P2 are 28.8,24.8 kg/mol and 1.71,1.74,respectively.Temperatures at mass loss of 5% for P1 and P2 are 320 ℃ and 322 ℃,respectively.The introduction of long side chain of alkoxy significantly improved the solubility of the two polymers in common organic solvents such as chloroform,tetrahydrofuran and so on.Their optical properties were investigated by UV-Vis absorption spectroscopy and fluorescence emission spectroscopy.The results indicated that the azobenzene in the polymers involved a trans-cis photoisomerization under the radiation of 365 nm UV light;the contents of cis-isomer-photostationary in P1 and P2 are 86.8% and 77.4% with corresponding efficiency of 82.7% and 73.7% for the anti-cis isomerization.Fluorescence emission peaks of P1 and P2 appeared at 418 nm and 428 nm under excitation at 366 nm and 363 nm.

关 键 词：偶氮苯 噻二唑 聚酰胺 合成 光学性能 

分 类 号：O631[理学—高分子化学]