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溶液法合成了一个新的铕配位聚合物[Eu(2,4-DClBA)3(CH3CH2OH)2]n(2,4-DClBA=2,4-二氯苯甲酸根),并用X-射线单晶衍射分析确定了其晶体结构。配合物晶体属于三斜晶系,P1空间群。标题配合物是无限一维链状聚合物,中心Eu3+离子通过桥联双齿2,4-二氯苯甲酸根氧原子连接。Eu3+离子的配位数为8,分别与4个桥联双齿2,4-二氯苯甲酸根的4个氧原子、1个螯合双齿2,4-二氯苯甲酸根的2个氧原子和2个乙醇分子的2个氧原子配位。紫外灯照射下配合物发出强的红光,配合物的荧光光谱中,5个峰位于580、593、619、652和699nm,分别对应于Eu3+离子的5D0→7FJ(J=0～4)跃迁。
A new Eu (2,4-DClBA) 3 (CH3CH2OH) 2] n (2,4-DClBA = 2,4-dichlorobenzoate) was synthesized by solution method and characterized by X-ray Single crystal diffraction analysis confirmed its crystal structure. Complex crystals belong triclinic, P1 space group. The title complex is an infinite one-dimensional chain polymer with the central Eu3 + ion connected by a bridged bidentate 2,4-dichlorobenzoate oxygen atom. The coordination number of Eu3 + ions is 8, which is respectively related to 4 oxygen atoms of 4 bridged bidentate 2,4-dichlorobenzoate, 2 of 1 chelate bidentate 2,4-dichlorobenzoate Oxygen atoms and two ethanol molecules two oxygen atoms coordinate. Under UV light irradiation, the complex emits strong red light. The five peaks at 580, 593, 619, 652 and 699 nm in the fluorescence spectrum of the complex correspond to the 5D0 → 7FJ (J = 0-4) transition of Eu3 + .