A New Pillared-layer Framework with Co^Ⅱ 4-Triazole Magnetic Layer Exhibiting Strong Spin-frustration

【摘要】 One new coordination polymer, [Co₄（H₂ O）₄（μ3-OH）₂（atz）₂（L）]_n（1）, was solvothermally prepared by the reaction of 3-amino-1,2,4-triazole（Hatz）, 4,8-disulfonyl-2,6-naphthalenedicarboxylic acid（H₄ L） and Co^Ⅱ salt. It crystallizes in monoclinic system, space group P2₁/c with a = 10.4454（7）, b = 12.2214（8）, c = 10.0818（7） ?, b = 102.284（7）, V = 1257.56（15） ?³, Dc = 2.325 g/cm³, Mr = 880.24, Z = 2, F（000） = 880, μ = 2.859 mm^-1, the final R = 0.0426 and wR = 0.0822 for 5526 observed reflections with I > 2σ（I）. Structural analyses indicate that 1 exhibits a three-dimensional（3 D） pillared-layer framework with triazolate extended Co₄^Ⅱ layers supported by rigid L^4- connectors. Magnetically, complex 1 displays strong spin-frustrated antiferromagnetism due to the triangular magnetic lattice and cooperative antiferromagnetic couplings mediated by quadruple heterobridges.更多还原

【Abstract】 One new coordination polymer, [Co₄（H₂ O）₄（μ3-OH）₂（atz）₂（L）]_n（1）, was solvothermally prepared by the reaction of 3-amino-1,2,4-triazole（Hatz）, 4,8-disulfonyl-2,6-naphthalenedicarboxylic acid（H₄ L） and Co^Ⅱ salt. It crystallizes in monoclinic system, space group P2₁/c with a = 10.4454（7）, b = 12.2214（8）, c = 10.0818（7） ?, b = 102.284（7）, V = 1257.56（15） ?³, Dc = 2.325 g/cm³, Mr = 880.24, Z = 2, F（000） = 880, μ = 2.859 mm^-1, the final R = 0.0426 and wR = 0.0822 for 5526 observed reflections with I > 2σ（I）. Structural analyses indicate that 1 exhibits a three-dimensional（3 D） pillared-layer framework with triazolate extended Co₄^Ⅱ layers supported by rigid L^4- connectors. Magnetically, complex 1 displays strong spin-frustrated antiferromagnetism due to the triangular magnetic lattice and cooperative antiferromagnetic couplings mediated by quadruple heterobridges.更多还原