离子聚合物对罗丹明B荧光发光行为的影响

Effect of Ionic Polymers on Fluorescence Behavior of Rhodamine B

传统荧光分子由于具有聚集诱导猝灭效应,其在高浓度或固态状态下荧光消失,限制了其实际应用。为克服这一缺陷,研究合成基于丙烯酸树脂的离子聚合物并将罗丹明B荧光分子原位掺杂于聚合物体系中。利用聚合物链段上的离子与荧光分子之间的电荷作用抑制荧光分子在体系中的聚集,设计合成了不同罗丹明B掺杂量和不同玻璃化温度下的荧光树脂,探讨了罗丹明B掺杂量、玻璃化温度、聚合物质量百分浓度、不同溶剂以及环境温度对荧光树脂性能的影响。结果表明,通过电荷的吸引作用,利用聚合物链段的吸附和阻隔,可促进荧光分子的有效分散,从而实现固化涂膜的有效发光。

Due to the aggregation induced quenching effect, the fluorescence of traditional organic fluorescent molecules often quenches at high concentration or solid state, which limits their practical applications. In order to conquer the deficiency, a number of acrylic resinbased ionic polymers were synthesized with in-situ incorporation of Rhodamine B in polymer system. Owing to the charge attraction between the ions in polymer chains and Rhodamine B , the aggregation trend of fluorescent molecules were inhibited effectively. Different fluorescent polymer resins with varying amount of Rhodamine B and glass transitions were synthesized. The effects of different factors, such as the amount of Rhodamine B, the glass transition temperature, the concentration of ionic polymer solution, the different solvents, and the surrounding temperature, on the fluorescent behavior of the prepared products were discussed. The results showed that due to the charge attraction and the isolation and absorption of polymer chains, the fluorescent molecules could disperse in the system homogeneously and emit strong fluorescence effectively.