摘要
Abstract
A novel coordination polymer [Sr2 (HTCMBT)2 (H2O)7]n was prepared by the reaction of a flexible tricarboxylic acid, N,N', N"-tris(carboxymethyl)-l,3,5-benzenetricarboxamide (H3TCMBT), with stronti-umnitrate and characterized by using Fourier transform infrared spectroscopy, elemental analysis and single crystal X-ray diffraction. The crystal crystallized in the monoclinic system, space group C-c with unit cell parameters α=l. 325 70(16) nm, b=2. 374 9(3) nm, c-1. 353 26(16) nm, α= γ= 90. 00°, β= 104.781(2)% V= 4. 119 7(9) nm3, Z=4, R=0. 043 2, wR2=0. 109 6. In the complex, Sr(II) ions adopted 9-coordinated monocaped square antiprism and 7-coordinated monocaped octahedron geometry. Two types of Sr(II) ions were bridged by carboxylic oxygen atoms to form a dinuclear cluster and ligands were presented as dimer. Using the cluster and the dimer as a node, respectively, a rare three-dimensional uninodal 4-connected neb net is obtained with Schlafli symbol of {6-6}.关键词
配位聚合物/柔性配体/二聚体/拓扑结构Key words
coordination polymer/ flexible ligand/ dimer/ topology分类
化学化工
