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为了研究Schiff类稀土配合物的组成和荧光性质,合成了N,N’-二(2-羟基-1-萘酚醛)-4,4’-二氨基二苯基甲烷(L1),N,N’-二(2-羟基-1-萘酚醛)-4,4’-二氨基二苯基甲烷(L2),N,N’-二(2-羟基-1-萘酚醛)-4,4’-二氨基二苯醚(L3)3种配体及其Eu(Ⅲ),Tb(Ⅲ)配合物。通过对配体和配合物的红外吸收、核磁共振、紫外吸收、元素分析、差热—热重、摩尔电导率及荧光光谱的测定分析了配合物的组成和性质。结果表明,配合物的组成为RE2(NO3)4.L4.2H2O(RE=Tb3+,Eu3+;L=L1,L2,L3),每个稀土离子与5个O、4个N配位,配位数为9,还有2个结晶水。室温下,Eu(Ⅲ),Tb(Ⅲ)配合物均有荧光发射,且Eu(Ⅲ)配合物发射出更强的Eu3+特征荧光,说明该类配体敏化Eu3+发光比Tb3+发光程度更大。
In order to study the composition and fluorescence properties of Schiff-like rare earth complexes, N, N’-bis (2-hydroxy-1-naphthol) -4,4’-diaminodiphenylmethane (L1) ’-bis (2-hydroxy-1-naphthoxal) -4,4’-diaminodiphenylmethane (L2) - Three ligands of diaminodiphenyl ether (L3) and their Eu (Ⅲ) and Tb (Ⅲ) complexes. The composition and properties of the complexes were analyzed by infrared absorption, nuclear magnetic resonance, UV absorption, elemental analysis, DTA - TG, molar conductivity and fluorescence spectra. The results show that the complex is composed of RE2 (NO3) 4.L4.2H2O (RE = Tb3 +, Eu3 +; L = L1, L2, L3) Number of 9, there are two crystal water. At room temperature, Eu (Ⅲ) and Tb (Ⅲ) complexes both have fluorescence emission and Eu (Ⅲ) complex emits stronger Eu3 + fluorescence, indicating that these ligand sensitized Eu3 + emit more luminescence than Tb3 + .