CAJ | 학술논문

溶液法合成了2种配合物[Tb(2-BrBA)2(CH3COO)(2,2'-bipy)]2(1)和[Tb(3-BrBA)3(2,2'-bipy)]2·2(3-HBrBA)·2H2O(2)(2-BrBA=2-bromobenzoate,3-BrBA=3-bromobenzoate,2,2'-bipy=2,2'-bipyridine),并用X-射线单晶衍射方法测定了其晶体结构.配合物1和2均属于三斜晶系和P(-1)空间群.四元混配配合物1是具有反演中心的二聚体,其中Tb3+离子同时与2种不同的羧酸配体配位.4个2-BrBA以双齿桥联的方式把2个Tb3+离子联结起来,而乙酸根和2,2'-bipv分子则分别以双齿螯合的方式与Tb3+离子配位.配合物2是三元混配配合物,2个Tb3+离子通过4个双齿桥联的3-BrBA联结而成具有反演中心的二聚体,每个Tb3+离子还同时与1个双齿螯合的3-BrBA和1个2,2'-bipy分子配位.配合物1和2在紫外灯照射下能发出强烈的绿光,而且在它们的荧光光谱中都存在4条谱线:489、545、585和621 nm,分别对应于Tb3+离子的5D4→7F6、5D4→7F5、5D4→7F4和5D4→7F3跃迁.
용액법합성료2충배합물[Tb(2-BrBA)2(CH3COO)(2,2'-bipy)]2(1)화[Tb(3-BrBA)3(2,2'-bipy)]2·2(3-HBrBA)·2H2O(2)(2-BrBA=2-bromobenzoate,3-BrBA=3-bromobenzoate,2,2'-bipy=2,2'-bipyridine),병용X-사선단정연사방법측정료기정체결구.배합물1화2균속우삼사정계화P(-1)공간군.사원혼배배합물1시구유반연중심적이취체,기중Tb3+리자동시여2충불동적최산배체배위.4개2-BrBA이쌍치교련적방식파2개Tb3+리자련결기래,이을산근화2,2'-bipv분자칙분별이쌍치오합적방식여Tb3+리자배위.배합물2시삼원혼배배합물,2개Tb3+리자통과4개쌍치교련적3-BrBA련결이성구유반연중심적이취체,매개Tb3+리자환동시여1개쌍치오합적3-BrBA화1개2,2'-bipy분자배위.배합물1화2재자외등조사하능발출강렬적록광,이차재타문적형광광보중도존재4조보선:489、545、585화621 nm,분별대응우Tb3+리자적5D4→7F6、5D4→7F5、5D4→7F4화5D4→7F3약천.
Two complexes of [Tb(2-BrBA)2(CH3COO)(2,2'-bipy)]2 (1) and [Tb(3-BrBA)3(2,2'-bipy)]2·2(3-HBrBA)·2H2O (2) (2-BrBA=2-bromobenzoate, 3-BrBA=3-bromobenzoate, 2,2'-bipy=2,2'-bipyridine) were synthesized by solvent method and their structures were determined by X-ray single crystal diffraction method. Complexes 1 and 2 both belong to triclinic system and P(-1) space group. The complex 1 is a dimer with an inversion center, in which two different carboxylate ligands coordinate to Tb3+ ion simultaneously to form quaternary mixed-ligands complex. Four 2-BrBA ligands link the two Tb3+ ions by bidentate-bridging mode, two acetate ligands coordinate to two Tb3+ ions by bidentate-chelating mode, and two 2,2'-bipy molecules chelate to two Tb3+ ion, respectively.The ternary complex 2 is also a dimer with an inversion center, in which the two Tb3+ ions are linked by four bidentate-bridging 3-BrBA ligands and each Tb3+ ion is further bonded to one bidentate-chelating 3-BrBA ligand and one 2,2'-bipy molecule. The two complexes exhibit strong green fluorescence under ultraviolet light and the fluorescence spectrums of them both have four peaks at 489, 545, 585 and 621 nm corresponding to 5D4 → 7F6,5D4 → 7F5, 5D4→ 7F4 and 5D4→ 7F3 transition emissions of the Tb3+ ion, respectively. CCDC: 631975, 1; 631976, 2.