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采用荧光分光光度法,实验测定了聚苯乙烯磺酸钠在无盐和有盐的水溶液中,单体和激态缔合体的荧光发射光谱.结果表明:激态缔合体单体发射强度比I_E/I_M随外加盐种类、浓度和价态而变化.在相同盐浓度下,各体系的I_E/I_M次序为:KCl>NaCl>LiCl和CaCl_2>MgCl_2。 也研究了NaCl水溶液中聚电解质分子的荧光猝灭.结果表明:随外加盐浓度逐渐增大,聚电解质分子由类棒状向无规线团状转化,该状态有利于激态缔合体的形成.
Fluorescence spectrophotometry was used to determine the fluorescence emission spectra of PSS in the salt-free and salt-free aqueous solution. The results showed that the emission intensity ratio of monomer / excimer was higher than that of I_E / I_M varied with the type, concentration and valence of the added salt.Under the same salt concentration, the order of I_E / I_M was KCl> NaCl> LiCl and CaCl_2> MgCl_2. The fluorescence quenching of polyelectrolyte molecules in aqueous solution of NaCl was also studied. The results show that the polyelectrolyte molecules are converted into random coillike clusters with increasing concentration of salt, which is favorable for the formation of excited states.