三元配合物Eu(BA)3PIP和 Eu(BA)3phen的制备与发光性质

合成了邻菲罗啉(phen)衍生物2-苯基-咪唑并 -1,10-菲罗啉(PIP),并以其为第二配体,苯甲酸(BA)为第一配体,制备出新型稀土铕三元有机配合物Eu(BA)₃PIP;在相同条件下,第一配体不变,1,10-菲罗啉为第二配体,还制备出Eu(BA)₃phen。采用元素分析、红外光谱、热重和差热分析等技术对合成的配体PIP及配合物Eu(BA)₃PIP和Eu(BA)₃phen进行了表征。通过发光光谱研究了配合物的发光性质,结果表明第二配体PIP有较大的共轭体系,在紫外光激发下,配合物中的配体可将吸收的能量传递给稀土Eu³⁺离子,表现出较强的Eu³⁺离子的特征发射。两种配合物相比,Eu(BA)₃PIP的发光强度明显大于Eu(BA)₃phen的发光强度,说明适宜的第二配体对配合物有很好的敏化发光作用。

Preparation and Fluorescence Properties of Ternary Complexes of Eu(BA)₃PIP and Eu(BA)₃phen

Rare earth complex materials have been widely used in cathodoluminescent display phosphor screens,lasers and lamps because their photoluminescence(PL) exhibits high quantum efficiencies and very sharp spectral bands.The luminescence process of the rare earth complex is as follows:the electrons in excited single state of the ligand move to the triplet state by intrasystem relaxation process,followed by the energy transfers from the triplet state of the ligand to the nearest resonance level of the rare earth ...