The linearity between the value of I3/I1 of pyrene and the dielectric constant indicates that pyrene can he used to probe the polarity changes of microenvironment.

• 结果表明，在所考察的有机溶剂体系里，芘的I3/I1，与介电常数呈线性相关，可用于探测微环境的极性性质变化规律；