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溶剂的极性对芘基烷基酮的单体荧光和激基缔合物荧光有很大影响,在非极性溶剂中单体荧光很弱,随着溶剂极性增大,单体荧光增强,单体荧光和激基缔合物荧光明显红移。利用芘基烷基酮荧光的这些性质研究了长链分子在二甲基亚砜-水(DMSO-H_2O)中的簇集现象。在浓度非常低的情况下,长链芘基烷基酮发射激基缔合物荧光,单体荧光也明显蓝移,表明芘基烷基酮形成了簇集体。长链饱和烷烃和芘基烷基酮发生共簇集,簇集体内的极性比环己烷的极性稍大。
The polarity of the solvent has a great influence on the monomer fluorescence of the pyrene alkyl ketone and the fluorescence of the excimer, the monomer fluorescence is very weak in the non-polar solvent, and as the solvent polarity increases, the monomer fluorescence is enhanced , The monomer fluorescence and excimer fluorescence significantly redshift. These properties of pyrene alkyl ketones were used to study the clustering of long chain molecules in DMSO-H 2 O. At very low concentrations, the long-chain pyrenyl alkyl ketones emit excimer fluorescence and the monomeric fluorescence is also clearly blue-shifted, indicating that pyrenyl alkyl ketones form clusters. Long-chain saturated alkanes and pyrenyl alkyl ketones co-clustered cluster polarity slightly larger than cyclohexane.