铟酞菁/氧化石墨烯高分子材料的制备及非线性光限幅性能研究

Study on preparation and performance of nonlinear optical limiting of polymers material containing indium phthalocyanine and graphene oxide

通过共价键合将二氨基二枯丁苯氧基氯代铟酞菁(Pc)与羧基化氧化石墨烯(GO-COOH)键合在一起,得到二氨基二枯丁苯氧基氯代铟酞菁-氧化石墨烯键合产物(Pc-GO-COOH),并以键合产物为原料反应得到引发剂。以甲基丙烯酸甲酯(MMA)为聚合反应单体,通过原子转移自由基聚合(ATRP)反应得到四种不同分子量的聚合物样品。采用凝胶渗透色谱(GPC)对聚合物分子量分布测试,结果表明,所制备的聚合物的分子量分布范围较窄,聚合反应具有良好的可控性。采用Z-扫描方法对聚合物样品溶液进行的三阶非线性测试结果表明,所制备的聚合物具有优良的三阶非线性光学性质,且当聚合物的分子量分别为9063和12196时,三阶非线性极化率值分别为8.1×10^-11、2.1×10^-11esu。同时对聚合物样品的光限幅性能测试结果表明,两种样品的有效激发态与基态吸收截面比分别为2.69和2.20,具有较好的光限幅能力,具有较大的应用前景。

The diaminodikhunophenoxy chloride indium phthalocyanine(Pc)was covalently bonded with carboxylated GO(GO-COOH)to obtain the diaminodikhunophenoxy chloride indium phthalocyanine-graphene oxide(Pc-GO-COOH),and the bonding products as raw material of the reaction initiator.Four kinds of polymer samples with different molecular weight were obtained by atom transfer radical polymerization(ATRP)with methyl methacrylate(MMA)as polymerization monomer.The molecular weight and molecular weight distribution of the prepared polymers were tested by gel permeation chromatography(GPC).The test results show that the preparation of polymers has narrow molecular weight distribution,the polymer reaction presents good controllability.The results of third-order nonlinear optical properties test on polymer sample solution by Z-scan show that the preparation of polymer has excellent third-order nonlinear optical properties,and when the molecular weight of polymer,respectively 9063 and 12196,the third order nonlinear polarizability values are 8.1×10^-11 esu and 2.1×10^-11 esu.At the same time,the optical limiting performance test show the effective excitation and ground state absorption cross section ratios of the two samples are 2.69 and 2.20,respectively.It has a good limiting ability and a great application prospect.