摘要
为了研究Eu(III)-配合物的共发光与其结构的关系,合成了Eu(III)／Gd(III)与2-噻酚三氟乙耽丙酮(HTTA)、对苯二甲酸(TPA)和邻菲罗啉(Phen)形成的系列配合物,井运用元素分析、红外光谱对这些配合物进行表征．共发光Gd3+离子对Eu(III)-配合物的荧光增强效果非常明显,其共发光效果与结构的关系是:网状多核配合物Eu2(1-x)Gd2x(TPA)3Phen2 >链状多核配合物Eu1-xGdx(TPA)(TTA)Phen>单核配合物Eu1-xGdx(TTA)3Phen．荧光增强的机理可从配合物的单核和多核结构获得解释,异多核配合物Eu1-xGdx(TPA)(TTA)Phen与Eu2(1-x)Gd2x(TPA)3Phen2分子内能量传递比异单核配合物Eu1-xGdx(TTA)3Phen分子间能量传递更有效．
In order to investigate the relationship between cofluorescence and the structure of the Eu （Ⅲ） complexes, a series of europium （Ⅲ）/gadolinium（Ⅲ） complexes of 2-thienyltrifluoroacetonate（TTA）/terephthalic acid（TPA） and phenanthroline（Phen） have been synthesized. These complexes were characterized by elemental analysis and infrared spectra analysis. The fluorescence enhancement of Gd^3＋ ions to the Eu（Ⅲ） complexes is clear. The effect of Gd^3＋ ion cofluorescence in the Eu（Ⅲ） complexes increases in the following order： the mononuclear complex Eu1-xGdx（TTA）3Phen, the chain polynuclear complex Eu1-xGdx（TPA）（TTA）Phen, the net polynuclear complex Eu2（1-x）Gd2x（TPA）3Phen2, which clearly establishes a correlation between the structure of the Eu（Ⅲ） complexes and the effect of cofluorescence for the first time. The mechanism of cofluorescence in the above-mentioned Eu（Ⅲ） complexes is preferably interpreted from the mononuclear and polynuclear structure of these complexes. Intra molecular energy transfer in the cross polynuclear complexes Eu1-xGdx（TPA）（TTA）Phen and Eu2（1-x）Gd2x（TPA）aPhen2 is more efficient than intermolecular energy transfer between cross mononuclear complexes Eu1-xGdx（TTA）3Phen.
出处
《湖南城市学院学报（自然科学版）》
CAS
2007年第1期45-49,共5页
Journal of Hunan City University:Natural Science
基金
Supported by Foundation of Hunan Education Bureau for Young Scholars Corresponding(05B075)
关键词
荧光性质
共发光
铕
对苯二甲酸
2-噻酚三氟乙酰丙酮
Fluorescent properties
Cofluorescence
Europium
Terephthalic acid
2-thienyltrifluoroacetonate
