In this paper, the effect of imidazole on the singlet oxygen quantum yield (Φ_Δ) of sinoporphyrin sodium (DVDMS) was studied. A relative method was used to measure Φ_Δ with Rose Bengal (RB) as the reference and 1,3-diphenylisobenzofuran (DPBF) as the singlet oxygen trapping reagent. It can be found that Φ_Δ of DVDMS decreased with the increment of imidazole concentration, and kept 0.33 after the imidazole concentration was above 0.26 M. The process of ¹O₂ generation and optical properties of DVDMS in different imidazole concentrations were studied to analyze the reason for the above behavior. The invariability of UV–vis absorption and photoluminescence spectra suggested that the reduction of Φ_Δ was attributed to the decrease of interaction between DVDMS and O₂, which was caused by the surrounding of imidazole on DVDMS. For efficient implementation of PDT, it is necessary to identify the factors that may reduce the effect of PDT.

在本文中，咪唑的对单线态氧量子产率（Φ的效果_Δ sinoporphyrin钠）（DVDMS）进行了研究。采用的相对方法来测量Φ _Δ与玫瑰红（RB）为作为单重态氧捕集试剂中的参考和1,3- diphenylisobenzofuran（DPBF）。可以发现，Φ _Δ DVDMS的与咪唑浓度的增加降低，并保持0.33咪唑浓度高于0.26 M的处理之后^1种Ò ₂中不同浓度的咪唑的DVDMS产生和光学特性进行了研究，分析出现上述行为的原因。紫外-可见吸收和光致发光光谱的不变性表明Φ的减小_Δ这归因于DVDMS和O ₂之间的相互作用减少，这是由于DVD​​MS上咪唑的周围环境所致。为了有效实施PDT，有必要确定可能会降低PDT影响的因素。