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通过钯催化的Sonagashira偶合反应合成出了3种带有不同链长烷氧基侧链,主链中含有2,1,3-苯并硒二唑组分的聚苯乙炔类共轭聚合物并对其化学结构进行了表征确认。此类聚合物在常用的有机溶剂中具有较好的溶解性和成膜性。通过紫外可见光谱、荧光光谱、循环伏安等对所得聚合物的基本性能进行了探讨。聚合物P7、P9和P12在溶液状态下的紫外吸收分别为421、450和450nm,相对应最大发射分别位于475、482和481nm;固态下聚合物的吸收分别为433、486和486nm,相对应最大发射为575、583和590nm。聚合物的循环伏安测试表明聚合物P7、P9、P12的起始电位为1.19、1.19、1.18V。聚合物非线性光学性能研究表明取代基为十二碳烷氧基的聚合物显示出了良好的三阶非线性光学性能,其三阶非线性光学系数为3.54×10-12esu。
Three kinds of polyacetylene-based conjugated polymers with 2,1,3-benzoselenazoles and 2,1,3-benzoselenazoles in the main chain were synthesized by palladium-catalyzed Sonagashira coupling reaction Its chemical structure was characterized and confirmed. Such polymers have good solubility and film-forming properties in common organic solvents. The properties of the obtained polymer were investigated by UV-Vis, fluorescence spectroscopy and cyclic voltammetry. The UV absorptions of polymers P7, P9 and P12 in solution state were 421, 450 and 450 nm, respectively, corresponding to the maximum emission at 475, 482 and 481 nm, respectively. The absorption of polymer in solid state was 433, 486 and 486 nm, respectively The maximum emission is 575, 583 and 590 nm. Cyclic voltammetry measurements of the polymers showed that the starting potentials of the polymers P7, P9, P12 were 1.19, 1.19, 1.18V. Studies on the nonlinear optical properties of polymers show that the polymers with substituents of dodecyloxy have good third-order nonlinear optical properties and the third-order nonlinear optical constants are 3.54 × 10-12esu.