低T_g双功能型光折变聚合物的合成及其光致发光特性

Synthsis and Photoluminescence Properties of Low-T_g Photorefractive Polymers of Double Founction

以不同比例的重氮盐分别与聚双(N-羟基己氧基咔唑)磷腈(P-1)进行偶合反应,得到了一组以咔唑和对硝基偶氮咔唑为官能团的双功能型光折变聚合物P-2,P-3和P-4,用31 P NMR,1 H NMR,IR,TG,DSC和UV-Vis光谱对该组聚合物进行表征和分析,以325nm的激发波长对P-1,P-2,P-3和P-4进行固体荧光稳态发射光谱的测试。结果表明,该组聚合物具有良好的热稳定性(Td≈300℃)和较低的玻璃化温度(Tg≈30～40℃),P-1具有良好的荧光活性,硝基的引入,导致P-2,P-3和P-4的荧光发生不同程度的猝灭,咔唑与对硝基偶氮咔唑的数量及其空间分布排列的都会对其荧光性能产生影响。

A group of low-Tg photorefractive polymers of double function with carbazole and p-nitrodiazencarbazole called P-2, P-3 and P-4 were synthesized by means of different proportional diazonium salts being diazcrcoupled with the poly [-bis（6-carba-zolhexyloxy）-] phosphazene（P-1）. P-2, P-3 and P-4 were characterized by ^31NMR, ^1H NMR, IR, UV-Vis, GPC, TG and DSC. The result showed that P-2, P-3 and P-4 have good heat stability （Td≈300 ℃） and a lower glass transition temperature （Tg≈30～40℃）. Their fluorescence properties were studied by photoluminescence and the result showed that P-1 has a stron-ger fluorescence properties and fluorescence intensity. P-2, P-3 and P-4 have varying degrees of quenching after nitro joining. The fluorescence properties were related with numbers of carbazole and nitro and their molecular space structure.