Details

Autor(en) / Beteiligte

• Huang, You-Gui
• Yuan, Da-Qiang
• Pan, Long
• Jiang, Fei-Long
• Wu, Ming-Yan
• Zhang, Xu-Dong
• Wei
• Gao, Qiang
• Lee, Jeong Yong
• Li, Jing
• Hong, Mao-Chun

Titel

A 3D Porous Cobalt−Organic Framework Exhibiting Spin-Canted Antiferromagnetism and Field-Induced Spin-Flop Transition

Ist Teil von

• Inorganic chemistry, 2007-11, Vol.46 (23), p.9609-9615

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Two 3D cobalt−organic frameworks formulated as [Co3(2,4-pydc)2(μ3-OH)2] n ·5nH2O (1) and [Co3(2,4-pydc)2(μ3-OH)2(H2O)] n ·7nH2O (2) (2,4-pydc = pyridine-2,4-dicarboxylate) have been hydrothermally synthesized and characterized. Both compounds 1 and 2 exhibit the 3D porous frameworks with hydroxyl-bridged metal Δ-chains. However, in comparison with only two crystallographically independent CoII ions in a unit of 2, three crystallographically independent CoII ions are found in an asymmetric unit of 1, where their Δ-chains are constructed by two types of vertexes sharing quadrangles formed via edge-sharing triangles. Magnetic studies show that 1 exhibits spin-canted antiferomagnetism and a field-induced spin-flop transition while 2 behaves as a normal antiferromagnet. The magnetic properties are largely retained by the porous frameworks of dehydrated 1 and 2 compounds. Gas adsorption measurements indicate that both the dehydrated compounds absorb H2 into their pores.