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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。研究发现 :在极稀溶液 ( ρ<0 0 5g/L)中 ,只在 2 85nm处观察到单链发射峰 ;随浓度增高 ,在 0 0 5～0 3 5g/L时 ,分别在 2 85nm和 3 3 5nm附近观察到 2个发射带 ,它们分别对应于单链和激基缔合物谱带 ;在 0 3 5～ 0 6g/L时 ,除了单链和激基缔合物发射峰外 ,还在 3 80nm处 ,观察到了一个“类激基缔合物”发射峰 ,并且观察到激基缔合物发射峰出现红移现象 ;在0 6～ 2 0 g/L时 ,则观察到 2 85nm和 3 80nm处的单链和“类激基缔合物”谱带 ;ρ >2 0g/L时 ,只观察到 3 80nm处的“类激基缔合物”谱带。SPS溶液中的“类激基缔合物”荧光发射峰源于在浓溶液中生色团形成的二缔合物的激发以及激发能从激发的生色团和激基缔合物迁移到激发的生色团二缔合物上的结果。
The fluorescence spectra of sulfonated polystyrene (SPS) in dichloroethane and mixed solvents were determined. The results showed that the single-stranded emission peak was observed only at 2 85 nm in a very dilute solution (ρ <0 05 g / L); at a concentration of 0 5 to 0 35 g / L, And 3 3 5nm around the observed two emission bands, which correspond to the single chain and excimer band respectively; at 0 3 5 ~ 0 6g / L, in addition to single-band and excimer emission peak , But also observed at 380nm, an “excimer-like” emission peak, and the excimer emission peak was observed red shift; at 0 6 ~ 20 g / L was observed 2 85nm and 3 80nm at the single-strand and “excimer-like complex” band; p> 20g / L, only observed at 380nm “class excimer” band. The “quasi-associate” fluorescence emission peak in the SPS solution originates from the excitation of the bi-complex formed by the chromophore in the concentrated solution and the migration of the excitation energy from the excited chromophore and exciplex to the excitation Of the chromophore complex on the results.