TY - JOUR
T1 - Synthesis, structures, and magnetism of copper(II) and manganese(II) coordination polymers with azide and pyridylbenzoates
AU - Zhang, Xiu Mei
AU - Wang, Yan Qin
AU - Song, You
AU - Gao, En Qing
PY - 2011/8/1
Y1 - 2011/8/1
N2 - Three transition-metal coordination polymers with azide and/or carboxylate bridges have been synthesized from 4-(3-pyridyl)benzoic acid (4,3-Hpybz) and 4-(4-pyridyl)benzoic acid (4,4-Hpybz) and characterized by X-ray crystallography and magnetic measurements. Compound 1, [Cu(4,3-pybz)(N3)] n, consists of 2D coordination networks in which the uniform chains with (μ-EO-N3)(μ-COO) double bridges are cross-linked by the 4,3-pybz ligands. Compound 2, [Cu2(4,4-pybz)3(N 3)]n•3nH2O, consists of 2-fold interpenetrated 3D coordination networks with the α-Po topology, in which the six-connected dinuclear motifs with mixed (μ-EO-N3)(μ-COO) 2 (EO = end-on) triple bridges are linked by the 4,4-pybz spacers. Compound 3, [Mn(4,4-pybz)(N3)(H2O)2] n, contains 2D manganese(II) coordination networks in which the chains with single μ-EE-N3 bridges (EE = end-to-end) are interlinked by the 4,4-pybz ligands, and the structure also features a 2D hydrogen-bonded network in which MnII ions are linked by double triatomic bridges, (μ-EE-N3)(O-H•••N) and (O-H•••O)2. Magnetic studies indicated that the mixed azide and carboxylate bridges in 1 and 2 induce ferromagnetic coupling between CuII ions and that 3 features antiferromagnetic coupling through the EE-azide bridge. In addition, compound 1 exhibits antiferromagnetic ordering below 6.2 K and behaves as a field-induced metamagnet. A magnetostructural survey indicates a general trend that the ferromagnetic coupling through the mixed bridges decreases as the Cu-N-Cu angle increases.
AB - Three transition-metal coordination polymers with azide and/or carboxylate bridges have been synthesized from 4-(3-pyridyl)benzoic acid (4,3-Hpybz) and 4-(4-pyridyl)benzoic acid (4,4-Hpybz) and characterized by X-ray crystallography and magnetic measurements. Compound 1, [Cu(4,3-pybz)(N3)] n, consists of 2D coordination networks in which the uniform chains with (μ-EO-N3)(μ-COO) double bridges are cross-linked by the 4,3-pybz ligands. Compound 2, [Cu2(4,4-pybz)3(N 3)]n•3nH2O, consists of 2-fold interpenetrated 3D coordination networks with the α-Po topology, in which the six-connected dinuclear motifs with mixed (μ-EO-N3)(μ-COO) 2 (EO = end-on) triple bridges are linked by the 4,4-pybz spacers. Compound 3, [Mn(4,4-pybz)(N3)(H2O)2] n, contains 2D manganese(II) coordination networks in which the chains with single μ-EE-N3 bridges (EE = end-to-end) are interlinked by the 4,4-pybz ligands, and the structure also features a 2D hydrogen-bonded network in which MnII ions are linked by double triatomic bridges, (μ-EE-N3)(O-H•••N) and (O-H•••O)2. Magnetic studies indicated that the mixed azide and carboxylate bridges in 1 and 2 induce ferromagnetic coupling between CuII ions and that 3 features antiferromagnetic coupling through the EE-azide bridge. In addition, compound 1 exhibits antiferromagnetic ordering below 6.2 K and behaves as a field-induced metamagnet. A magnetostructural survey indicates a general trend that the ferromagnetic coupling through the mixed bridges decreases as the Cu-N-Cu angle increases.
UR - https://www.scopus.com/pages/publications/79960797171
U2 - 10.1021/ic2008842
DO - 10.1021/ic2008842
M3 - 文章
AN - SCOPUS:79960797171
SN - 0020-1669
VL - 50
SP - 7284
EP - 7294
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 15
ER -