两个基于4-(1H-1,2,4-三氮唑)苯甲酸的4d-4f异核配位聚合物的合成、结构及荧光性质（英文）

Two Heterometallic 4d-4f Coordination Polymers Based on 4-(1H-1,2,4-Triazol-1-yl)benzoic Acid: Syntheses, Structures, and Fluorescence Properties

以4-(1H-1,2,4-三氮唑)苯甲酸(Htbc)为配体,采用水热法合成了两种新型4d-4f配位聚合物{[EuAg(tbc)_3(H_2O)]ClO_4·H_2O}n(1)和{[Eu_2Ag_3(tbc)_6(NO_3)_2(H_2O)_2](ClO_4)_2·2H_2O}_n(2)。运用X射线单晶衍射法对该配位聚合物进行了结构测定,并对其进行了元素分析、红外光谱、PXRD及荧光光谱表征。单晶结构表明,配位聚合物1为正交晶系,空间群P212121,由一维三股螺旋链(其中2股右手螺旋和1股左手螺旋)通过Ag将其连成二维平面。配位聚合物2属于三斜晶系,空间群为P1,由内消旋一维两股螺旋链通过Ag将其连成二维平面。配位聚合物1和2的二维链结构均通过非共价键作用形成三维超分子,同时也表征了配位聚合物1和2的荧光性质。

Two 2D heterometallic 4d-4f coordination polymers, {[EuAg（tbc）3 （H2O）]ClO4·H2O}, （1） and {[Eu2Ag3 （tbc）6（NO3）2（H2O）2]（ClO4）2·2H2O}n （2） （Htbc=4-（1H-1,2,4-triazol-l-yl） benzoic acid） were synthesized under hydro- thermal condition using one-step approach and structurally characterized by elemental analysis, FT-IR, powder X- ray diffraction and single-crystal X-ray diffraction. The single-crystal X-ray diffraction analysis reveals that the two complexes present two different types of two dimensional （2D） structures. Complex 1 crystallized in an orthorhombic manner having a P212121 space group, consisting of 1D triple-stranded helical （PPM） [Eu（μ3-OCO）2 （μ2-OCO）] motif as chain which are further linked by the fragments of tbcligands and Ag（I）. Polymer 2 is crystallized in a triclinic fashion having a P1 space group, consisting of 1D mesomeric chains [Eu（μ3-OCO）2] which were further linked by the two different [N-Ag-N] units to form an interesting 2D 4d-4f heterometallic coordination polymer in the ab plane. The solid-state luminescent behaviors of compounds 1 and 2 were investigated at room temperature. CCDC： 1018336, 1; 1024087 2.