含8-羟基喹啉侧基聚酯的合成、结构表征及荧光性能

The synthesis,characterization and fluorescence property of polyesters with 8-hydroxyquinoline side groups

以5-硝基间苯二甲酸、5-氯甲基-8-羟基喹啉盐酸盐等为主要原料,经多步反应合成了2种新型含8-羟基喹啉侧基聚酯P5和P6.利用IR、UV-Vis、1 H NMR、GPC和荧光光谱对相关化合物结构和性能进行表征.P5的重均分子量Mw、数均分子量Mn和相对分子质量分布指数PDI为4 416、3 025g/mol和1.46.P6的重均分子量Mw、数均分子量Mn和相对分子质量分布指数PDI为7 661、5 040g/mol和1.52.P5和P6的紫外光谱表明,二者的吸收峰位于266、328nm处,分别归属于苯环的π-π*跃迁吸收峰和喹啉环的π-π*跃迁吸收峰.溶解性测试表明,P5和P6易溶于DMAc、DMF、DMSO和NMP,部分溶于THF和CHCl3.P5和P6的DMF溶液(5×10-5 mol/L)以362nm波长光激发,分别在432、433nm处出现最大发射峰,发射紫色荧光.

Two novel polyesters with 8‐hydroxyquinoline side group （P5 ,P6）was synthesized by multi‐step reaction with 5‐nitro isophthalic acid ,5‐chloromethyl‐8‐hydroxyquinoline hydrochloride as raw material .The structure and properties of related compounds were characterized by IR ,UV‐Vis ,1 H NMR ,GPC and fluorescence spectra .The Mw ,Mn and PDI of P5 were 4416 ,3052 g/mol and 1 .46 . The Mw ,Mn and PDI of P6 were 7661 ,5040 g/mol and 1 .52 .The absorption peaks of P5 ,P6 ap‐peared at 266 and 328 nm ,attributed to π‐π＊ transition absorption peak of the benzene ring and quin‐oline ring ,respectively .Solubility test showed that the P5 and P6 can be dissolved in DMAc ,NMP , DMF and DMSO ,partly be dissolved in THF and CHCl3 .Fluorescence emission peaks of P5 and P6 in DMF solution （5 × 10-5 mol/L） appeared at 432 and 433 nm ,they emit purple light .