用氯化铕和氯化镧混合溶液与苯甲酰胺及桂皮酸铵在水溶液中反应 ,合成了苯甲酰胺 -桂皮酸 -铕-镧配合物 ,其化学组成式为 ( Eux L a1- x) L′L3(其中 L′代表 C6 H5CONH2 ,L 代表 C6 H5CH=CHCOO- ,x分别为1 .0 0 ,0 .90 ,0 .70 ,0 .50 ,0 .30和 0 .1 0 )。测定了配合物的红外光谱及荧光光谱。结果表明 ,苯甲酰胺的氧原子和氮原子均与稀土离子配位 ;桂皮酸的羧基氧与稀土离子成键。在系列配合物中 ,由不发光的 La3+ 离子取代部分发光的Eu3+离子 ,可明显提高 Eu3+离子的特征荧光。本文对发光机理进行了初步探讨。 The complex of benzamide-cinnamic acid-europium-lanthanum was synthesized by the reaction of europium chloride and lanthanum chloride with benzamide and ammonium cinnamate in aqueous solution. The chemical formula was (Eux L a1-x) L’L3 (wherein L ’represents C6 H5CONH2 and L represents C6 H5CH = CHCOO- with x of 1.00, 0.90, 0.70, 0.50, 0.30 and 0.1, respectively). The infrared spectra and fluorescence spectra of the complexes were determined. The results showed that both the oxygen atom and the nitrogen atom of benzamide coordinated with rare earth ions, and the carboxyl oxygen of cinnamic acid was bonded with rare earth ions. In the series of complexes, the partial luminescence of Eu3 + ions by the non-luminescent La3 + ions can obviously improve the characteristic fluorescence of Eu3 + ions. In this paper, a preliminary discussion of the mechanism of light emission.