冠醚分析方法的研究Ⅳ.DB 30 C 10和B 15 C5的紫外分光光度测定法

Study on the analytical method of crown ethers Ⅳ.Determination of dibenzo-30-crown-10 and benzo-15-crown-5 by ultraviolet spectrophotometry

对二苯并-30-冠-10(DB 30 C 10)和苯并-15-冠-5(B 15 C 5)的紫外分光光度测定法进行了研究。结果表明,DB 30 C 10在2.0×10^(-5)～2.4×10^(-4)mol/L 和 B 15 C 5在3.40×10^(-9)～4.1×10^(-4)mol/L 范围内遵守比耳定律。给出了两种试剂在不同溶液中的λ_(max)和ε值。

The electronic spectral properties of DB30C10 and B15C5 were investigated in severalsolvents.Ultraviolet absorption maxima andmolar absorptivities were reported(DB30C10:λ_(max)^(1.4=dioxane) 278nm,ε=5100,B15C5:λ_(max)^((?)th(?)nol)277 nm,ε=2530).The proposed method may be appliedto the analysis of reagents DB30C10 and B15C5.