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 ;化合物的THF稀溶液的光致荧光相对量子产率随共轭程度的降低而增加 A new method of synthesizing alkyl-substituted poly (p-phenylenevinylene) (PPV) derivatives was designed and a new alkyl-substituted PPV poly (2-methyl 5dodecylphenylene vinylene) was synthesized and characterized by NMR , IR, GPC and elemental analysis were used to characterize and identify the compounds.Meanwhile, the thermal properties, UV-Vis absorption and photoluminescence of the compounds were also tested.The glass transition temperature and the first decomposition temperature of the compounds were found to vary with the degree of conjugation ; The relative quantum yield of photoluminescence of the dilute THF solution increased with the decrease of conjugation degree