双-单齿芳香酰胺型配体桥联La3＋一维配位聚合物的合成与晶体结构

通过硝酸镧和双-单齿芳香酰胺型配体L {L＝1,4-双[(2'-苄胺甲酰基苯氧基)-甲基]苯}之间的反应得到了配位聚合物{[La(NO₃)₃]₂•L₃}_n, 并用X射线单晶衍射测定了配合物的晶体结构. 配合物为三斜晶系, _P1空间群, 晶胞参数a＝1.1298(2) nm, b＝1.2689(1) nm, c＝2.1030(3) nm, α＝81.189(9)°, β＝80.95(1)°, γ＝65.832(9)°, V＝2.7032(6) nm³, Z＝2, R＝0.0267, wR＝0.0679, La^3＋为9配位, 呈变形的三帽三角棱柱配位构型. 配合物通过配体的桥联作用形成一维环链相间的配位聚合结构, 由于相邻链间不存在氢键和π-π堆积作用, 所以配合物是以单链形式堆积排列.

Synthesis and Crystal Structure of 1D Coordination Polymer of La3+ Bridged by an Aryl Amide Type Bis-monodentate Ligand

Coordination polymer {[La(NO₃)₃]₂•L₃}_n {L＝1,4-bis{[2'-(benzylaminocarbonyl)-phenoxyl]-methyl}benzene has been synthesized by the reaction of an aryl amide type bis-monodentate ligand and La(NO₃)₃•6H₂O, and the crystal structure of this complex has been characterized by X-ray diffraction analysis．The crystal structure belongs to triclinic system with space group _P1, a＝1.1298(2) nm, b＝1.2689(1) nm, c＝2.1030(3) nm, α＝81.189(9)°, β＝80.95(1)°, γ＝65.832(9)°, V＝2.7032(6) nm³, Z＝2, R＝0.0267, wR＝0.0679. The La^3＋ took nine-coordinate in a distorted tricapped trigonal prism. The complex formed 1D coordination polymer consisting of rings connected by chains alternately by the bridging of ligand. These 1D polymers were packed in an independent style for the lack of inter chain hydrogen bond and π-π intreaction．