本文对丹参酮 ( Tan )分子的紫外吸收、荧光光谱 ,液氮低温下的荧光、磷光光谱等光谱行为进行了详细的对比研究 ,考察了酸度对各种光谱的发光强度及波长位置影响的规律 ,计算了磷光寿命、荧光量子产率、偏振等重要参数。p H对 Tan 的荧光光谱特性有影响。在强酸或强碱介质中 Tan 的荧光被显著猝灭 ,发射光谱蓝移 ,并有分子结构的变化 ,在强碱性介质中 Tan 发生了不可逆的开环反应 In this paper, the spectral behaviors of Tan molecules such as UV absorption, fluorescence spectra, fluorescence at low temperature and phosphorescence spectra were studied in detail. The effects of acidity on the luminescence intensity and wavelength position of various spectra were investigated. Calculated phosphorescence lifetime, fluorescence quantum yield, polarization and other important parameters. p H has an influence on the fluorescence spectrum of Tan. In strong acid or alkali medium, the fluorescence of Tan was significantly quenched, the emission spectra were blue-shifted and the molecular structure was changed. The irreversible ring-opening reaction occurred in Tan in strong alkaline medium