铕与2,4-二氯苯甲酸—维链状配位聚合物的合成,晶体结构和发光性质

摘要

溶液法合成了一个新的铕配位聚合物[Eu(2,4-DCIBA)3(CH3CH2OH)2],(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-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699 nm,分别对应于Eu3+离子的5D0→7FJ(J=0-4)跃迁.%A europium coordination polymer [Eu(2,4-DClBA)3(CH3CH2OH)2]n (2,4-DCIBA=2,4-dichlorobenzoate) was prepared by solvent method and its structure was determined by X-ray diffraction single-crystal structure analysis.The complex crystallizes in triclinic crystal system, P1 space group.The rifle complex is a infinite 1D chain polymeric structure through oxygen atoms of bidentate-bridging 2,4-DClBA anions linking up the neighboring central Eu3+ ions.Each Eu3+ ion is eight-coordinated with four oxygen atoms of four bidentate-bridging 2,4-DCIBA anions,two oxygen atoms of one bidentate-chelating 2,4-DCIBA anion and two oxygen atoms of two ethanol molecules.This complex exhibits strong red fluorescence radiated by ultraviolet light and the fluorescence spectrum has five peaks at 580, 593, 619, 652 and 699 nm corresponding to 5D0→7FJ(J=0-4) transitions of the Eu3+ ion.CCDC: 667995.