运用循环伏安法和紫外光谱法研究了Ｅｕ（ｐｈｅ）３＋３与ＤＮＡ的相互作用。Ｅｕ（ｐｈｅ）３＋３与ＤＮＡ作用后，循环伏安曲线的峰电流密度减小，峰电位差稍有增加，扩散系数减小。紫外光谱的特征吸收峰呈明显的减色效应。这可能是Ｅｕ（ｐｈｅ）３＋３与ＤＮＡ因静电引力形成加合物以及Ｅｕ（ｐｈｅ）３＋３有很强的遮蔽负电荷的作用，促使碱基面与碱基面的进一步堆积（ｓｔａｃｋｉｎｇ）所致。 The interaction between Eu (phe) 3 + 3 and DNA was studied by cyclic voltammetry and UV spectroscopy. After the interaction between Eu (phe) 3 + 3 and DNA, the peak current density of the cyclic voltammetry decreases, the peak potential difference slightly increases, and the diffusion coefficient decreases. The characteristic absorption peak of UV spectrum shows a significant reduction effect. This may be due to the strong negative shielding effect of Eu (phe) 3 + 3 on the formation of adduct by electrostatic attraction and Eu (phe) 3 + 3, resulting in further stacking of base and base planes.