罗丹明B修饰树枝状聚(胺-酯)及其荧光性能研究

摘要

Poly (amine-ester)- Rhodamine B dendrimer (PAE-RHDB) was synthesized from ethylenediamine, tri⁃methylolpropane triacrylate and Rhodamine B. Effects of reaction temperature, reaction time and ratio of reac⁃tants on the yield of products were discussed by orthogonal experiment. The structure of products was identified by FTIR、UV and 1HNMR. Fluorescence properties of PAE-RHDB were studied. It was found that when reaction temperature was 60 ℃ , reaction time was 3 h, n(-NH2): n (-COOH) = 2:1, CH3Cl as solvent, the yield was 34.86%. When the concentration of PAE-RHDB is 0.15 mg/mL, methanol as solvent, the fluorescence intensity of the solution is the strongest. The ratio of raw materials and products has nothing to do with fluorescence per⁃formance.%　　以乙二胺、三羟甲基丙烷三丙烯酸酯和罗丹明 B 为原料,合成了聚(胺-酯)-罗丹明 B (RHDB)树枝状大分子(PAE-RHDB).通过正交实验讨论了反应温度、反应时间及原料配比对产物产率的影响,并用 IR、1HNMR 和 UV 表征了它的结构.研究了 PAE-RHDB 的荧光性能.实验结果表明,当反应温度为60℃,反应时间为3 h,原料配比 n(-NH2)：n(-COOH)=2：1时,以氯仿为溶剂,产物产率为34.86%；当 PAE-RHDB 浓度为0.15 mg/mL,甲醇为溶剂,溶液荧光性能最强,原料配比对产物荧光性能无影响.