摘要
测定了磺化聚苯乙烯 (SPS)在二氯乙烷及混合溶剂中的荧光光谱 .在甲苯/甲醇混合溶剂中 ,SPS的荧光光谱随甲醇含量变化显示共溶性行为 .在稀溶液中 ,分别在 2 85 nm和 3 3 5 nm附近出现两个发射带 ,它们分别对应于单体和激基缔合物谱带 .随浓度增高 ,激基缔合物发射峰出现红移现象 ,除了单体和激基缔合物发射峰外 ,在 3 80 nm处出现一个“类激基缔合物”发射峰 .SPS溶液中的“类激基缔合物”
Fluorescence of sulfonated polystyrene(SPS) in dichloroethane(DCE) and mixed solvents was measured as a function of polymer concentration. Fluorescence of SPS in the mixture of toluene and methanol showed cosolvent behavior, as a function of methanol composition. It was found that two emission bands in dilute solution appeared at around 285nm and 335nm, corresponding to the monomer and excimer bands, respectively.The excimer emission peaks take a red shift with the increase of concentration. The emission band, except monomer and excimer emission, centered at around 380nm, was assigned to 'excimer-like' emission. The 'excimer-like' emission of SPS solution was interpreted as a consequence of excitation of dimer formed in the ground states in concentrated solution and migration of excitation energy to the excited dimer sites from the excited chromophore and excimer.
出处
《西北轻工业学院学报》
2000年第2期23-27,共5页
Journal of Northwest University of Light Industry
关键词
磺化聚苯乙烯
激基缔合物
共溶性
荧光光谱
sulfonated polystyrene(SPS)
fluorescence
excimer
excimer-like
cosolvency
