New Two-Dimensional Metal−Organic Networks Constructed from 1,2,4,5-Benzenetetracarboxylate and Chelate Ligands
dataset
posted on 2003-04-02, 00:00 authored by Yangguang Li, Na Hao, Ying Lu, Enbo Wang, Zhenhui Kang, Changwen HuTwo novel nickel coordination polymers [Ni<sub>2</sub>(2,2‘-bipy)<sub>2</sub>(OH)<sub>2</sub>(H<sub>2</sub>btec)]<sub>3</sub><i><sub>n</sub></i> (<b>1</b>) and [Ni<sub>2</sub>(1,10‘-phen)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>(btec)]<i><sub>n</sub></i> (<b>2</b>)
(btec = 1,2,4,5-benzenetetracarboxylate) have been hydrothermally synthesized and characterized by elemental
analyses, IR and XPS spectra, TG analysis, X-ray powder diffraction, and single crystal X-ray diffraction. Crystal
data for <b>1</b>: C<sub>90</sub>H<sub>66</sub>N<sub>12</sub>O<sub>30</sub>Ni<sub>6</sub>, monoclinic <i>P</i>2<sub>1</sub>/<i>c</i>, <i>a</i> = 10.905(2) Å, <i>b</i> = 18.006(4) Å, <i>c</i> = 20.551(4) Å, β =
94.91(3)°, <i>Z</i> = 2. Crystal data for <b>2</b>: C<sub>34</sub>H<sub>22</sub>N<sub>4</sub>O<sub>10</sub>Ni<sub>2</sub>, monoclinic <i>P</i>2<sub>1</sub>/<i>n</i>, <i>a</i> = 10.122(2) Å, <i>b</i> = 9.3106(19) Å, <i>c</i> =
15.690(3) Å, β = 92.03(3)°, <i>Z</i> = 2. Compound <b>1</b> exhibits a novel one-dimensional chainlike structure, in which the
dinuclear Ni centers are linked by the btec ligands. Furthermore, the adjacent chains are linked into a 2-D wavelike
layer via the strong OH···O hydrogen bonding interactions. Compound <b>2</b> possesses an unusual two-dimensional
steplike network with interesting rhombic grids. Both compounds exhibit unprecedented metal−organic ligand
construction modes in {M/btec/L} (M = transition metal; L = chelate ligands) systems. The magnetic behaviors
of compounds <b>1</b> and <b>2</b> have been studied.
