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在水热条件下,合成配合物[Ho2(bpdc)3·(H2O)4].5H2O单晶(bpdc为2,2’-联吡啶-6,6’二羧酸).配合物晶体属于三斜晶系,P-1空间群.在晶体结构中含有2种独立配位模式Ho3+,其配位构型都是八配位的扭曲四方反棱柱体.一种为一个配体H2bipy上的2个氮原子和2个羧基氧原子采用螯合配位占据四方反棱柱体的4个顶点位置,同时余下4个顶点位置被4个配位水分子占据;另一种是2个配体H2bpdc上的4个氮原子与4个羧基上的氧原子配位形成八配位的扭曲四方反棱柱体构型.配合物分子之间通过分子内和分子间的氢键作用与π-π堆积作用进一步形成三维框架结构.
Under hydrothermal conditions, the complex [Ho2 (bpdc) 3 · (H2O) 4] · 5H2O (bpdc is 2,2’-bipyridine-6,6’dicarboxylic acid) In the crystal structure, there are two kinds of independent coordination modes, Ho3 +, whose coordination configurations are eight-coordinated distorted tetragonal antiprism. One is a ligand H2bipy on the 2 A nitrogen atom and two carboxyl oxygen atoms adopt chelation coordination to occupy the four vertices of the tetragonal antiprism while the remaining four vertex positions are occupied by four coordination water molecules and the other is two ligands on the H2bpdc Of the four nitrogen atoms and four carboxyl oxygen atoms to form octahedral distorted tetragonal antiprism configuration.Complex molecules through the intramolecular and intermolecular hydrogen bonds with π-π stacking effect further Form a three-dimensional frame structure.