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研究了三种苯并－１５－冠－５与Ｅｕ（Ⅲ）配合物在乙腈中的荧光性质．发现对Ｅｕ（Ⅲ）荧光的猝灭能力是苯并－１５－冠－５（Ｉ_ａ）＞４＇－硝基苯并－１５－冠－５（Ｉ_ｅ）＞４＇－甲酰基苯并－１５－冠－５（Ｉ_ｂ）。且Ｉｂ与Ｅｕ（Ⅲ）之间存在能量传送作用．首次提出利用￣５Ｄｏ－￣７Ｆ_２／￣５Ｄｏ－￣７Ｆ_１（ＥＴＦＰ／ＭＴＦＰ）之比可以反映出苯环上４＇－取代基的不同对Ｅｕ（Ⅲ）对称性的影响，且这个比值与能量传递无关．
The fluorescence properties of three benzo-15-crown-5 and Eu (Ⅲ) complexes in acetonitrile were studied. The quenching ability of Eu (Ⅲ) fluorescence was found to be benzo-15-crown-5 (I_a)> 4’-nitrobenzo-15-crown-5 (I_e)> 4’-formylbenzo-15 Crown-5 (I_b). And there is energy transfer between Ib and Eu (Ⅲ). It is first proposed that the ratio of 4’-substituents on the benzene ring can affect the symmetry of Eu (Ⅲ) by using the ratio of ~ 5Do ~ ~ 7F_2 / ~ 5Do ~ ~ 7F_1 (ETFP / MTFP) Nothing to do