紫外光照下C_(60)与聚苯乙烯直接反应合成C_(60)-聚苯乙烯衍生物及电子自旋共振(ESR)研究  

Synthesis and ESR Spectrum Study of C_(60)-Polystyrene by Direct Reaction of Polystyrene and C_(60) under UV Photoinitiator

作　　者：沈建中[1] 陈士明[2] 郭崇东[1] 蔡瑞芳[1] 

机构地区：[1]复旦大学化学系,上海200433 [2]复旦大学分析测试中心,上海200433

出　　处：《化学学报》2003年第6期954-958,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.2 9890 2 1 6 ;2 0 2 71 0 1 3)资助项目

摘　　要：在室温 ,紫外光照下溶液相中C60 与聚苯乙烯的直接反应合成得聚苯乙烯的C60 加合物 .衍生物中C60 的含量可由C60的投料比来控制 .得到的产物经UV Vis ,FTIR ,GPC ,TGA及DSC等波谱表征 ,测得产物的分子量比母体聚苯乙烯的分子量稍高 .对溶液相的反应进行了现场的ESR研究 ,得到强的PSC-·60 的自由基信号 ,g值为 2 .0 0 2 4.同时对C60 和聚苯乙烯混合物固相体系的光照反应进行了ESR测试 .结果表明在反应过程中及最终产物中均存在稳定的C60 高分子链烃基自由基阴离子RC-·60 .The C-60 chemically modified polystyrene derivatives were synthesized by direct reaction of a benzene solution of poly styrene and C-60 using UV irradiation at room temperature. The extent of fullerenation can be controlled by varying the C-60 feed mass ratio. The products were characterized by UV-Vis, FTIR, GPC, TGA and DSC techniques. The molecular weights of the C-60-polystyrene derivatives were higher than those of the parent polystyrene. The reaction of C-60 with polystyrene in benzene solution was monitored by electron spin resonance (ESR) spectrum. An intense signal of stable free radical PSC60-. was observed with a g-value of 2.0024. The ESR measurement also was performed in quartz ESR tubes containing a polystyrene/C-60 solid mixture under UV irradiation. All of the samples gave an ESR signal of fullerene polystyrene radical PSC60-., and some ESR signals remained in final solid C-60-PS product after precipitation and drying in air. These results indicated the radical mechanism of the reaction.

关 键 词：紫外光 C60 聚苯乙烯 直接反应 合成 C60-聚苯乙烯衍生物 电子自旋共振 富勒烯 自由基反应 

分 类 号：O657.2[理学—分析化学]