烷基取代聚对亚苯基亚乙烯基衍生物的合成和性质研究  

SYNTHESIS AND PROPERTIES OF ALKYL SUBSTITUTED POLY(1,4-PHENYLENEVINYLENE) DERIVATIVES

作　　者：郑俊荣[1] 何谷峰[1] 杨春和[1] 王荣秋[1] 黄兰[2] 李永舫[1] 

机构地区：[1]中国科学院化学研究所分子科学中心,北京100080 [2]北京大学化学学院,北京100871

出　　处：《高分子学报》2000年第5期644-648,共5页Acta Polymerica Sinica

基　　金：国家自然科学基金资助项目!(基金号 29673051;299925304)

摘　　要：设计了一种合成烷基取代聚对苯撑乙烯 (PPV)衍生物的新方法 ,合成了一种新的烷基取代PPV 聚(2 甲基 5 十二烷基对苯撑乙烯 ) ,并用NMR、IR、GPC、元素分析等方法对化合物进行了表征与鉴定 .同时 ,测试了化合物的热学性质、紫外可见吸收和光致荧光性质 .发现化合物的玻璃化温度和第一分解温度随着共轭程度的增加而升高 ;A new synthetic route was designed for synthesizing the luminescent polymers of alkyl substituted poly(1,4 phenylenevinylene) derivatives (alkyl\|PPV).The monomer of the polymers was synthesized by two steps:first,using Li\-2CuCl\-4 to catalyze cross\|coupling of aryl grignard reagent with alkyl halides to introduce alkyl long\|chained substituents to benzene ring,second,using SnCl\-4 to catalyze chloromethylation of the alkyl long\|chained substituted benzene.The yield of the monomer synthesized by this method was much higher than that by any other methods that were ever reported.The polymerization of the monormer was carried out by using t \|BuOK to remove HCl. Poly(2 \|dodecyl\|5\|methyl\|1,4\|phenylenevinylene) was synthesized with that synthetic route.The structure and properties of the polymers were identified and characterized by IR,UV\|Vis,luminescent spectra,GPC,thermal(DSC and TGA) and elemental analysis.It was found that the glass transition temperature increases and the photoluminescent relative quantum yield decreases with the increase of the conjugation extent of the polymers,and the photoluminescent relative quantum yield of the polymers can be as high as 78%.

关 键 词：烷基取代聚对苯撑乙烯 合成 光致荧光性能 

分 类 号：O632[理学—高分子化学]