前文报道了长链β-萘甲酸烷基酯在不良溶剂中形成激基缔合物,为长链分子在不良溶剂中发生簇集提供了新的证据.本文报道证明长链分子在不良溶剂中发生簇集的另一个实验事实.长链水杨酸烷基酯在二甲基亚砜-水(DMSO-H_2O)和乙二醇-水(EG-H_2O)混合溶剂中的荧光光谱分布以及荧光量子产率与短链水杨酸烷基酯的显著不同,这些差别可以用长链分子发生簇集来加以解释. We have previously reported that long-chain β-naphthoic acid alkyl esters form excimer in poor solvents, providing new evidence for the long-chain molecules clustering in poor solvents.This paper reports that long-chain molecules in poor solvents Another experimental fact of clustering occurs: The fluorescence spectra of long chain alkyl salicylates in dimethyl sulfoxide - water (DMSO-H 2 O) and ethylene glycol-water (EG-H 2 O) The quantum yield is significantly different from that of short chain alkyl salicylates, and these differences can be explained by the clustering of long chain molecules.