Layered cobalt(II) and nickel(II) diphosphonates showing canted antiferromagnetism and slow relaxation behavior

	Layered cobalt(II) and nickel(II) diphosphonates showing canted antiferromagnetism and slow relaxation behavior
	D. K. Cao ; Y. Z. Li ; L. M. Zheng
刊名	Inorganic Chemistry
	2007-09
卷号	46 期号:18 页码:7571-7578
关键词	induced magnetic transitions weak ferromagnetism chain structures metal phosphonate bisphosphonates complex co(ii) bone
ISSN号	0020-1669
中文摘要	Reactions of 2-(1-imidazole)-1-hydroxyl-1,1'-ethylidenediphosphonic acid (ImhedpH(4)) and cobalt or nickel salts under hydrothermal conditions lead to four new metal phosphonates with two types of structures: M-3(ImhedpH)(2)(H2O)(4)center dot 2H(2)O [M = Co(II) (1) and Ni(II) (2)] and M(ImhedpH(3))(2)(H2O)(2) [M = Co(II) (3) and Ni(II) (4)]. Compounds 1 and 2 are isostructural and show a layered structure made up of M-3(ImhedpH)(2)(H2O)(4) trimer units. These trimers are connected by edge-sharing of the {Co(2)O-6} octahedra, forming an undulating chain. The adjacent chains are fused through the coordination of the phosphonate oxygen atom from one chain to the Co(2) atom of the other, thus generating a two-dimensional layer containing 4-, 8-, and 16-membered rings. The imidazole groups are grafted on the two sides of the layer. Compounds 3 and 4 are also isostructural and show a mononuclear structure with extensive hydrogen bond interactions. Magnetic measurements reveal that both 1 and 2 exhibit canted antiferromagnetism at 2.6 and 5.0 K, respectively. Below these temperatures, slow relaxation is observed from the ac susceptibility measurements corresponding to the spin-glass-like behaviors.
语种	英语
公开日期	2013-04-01
内容类型	期刊论文
源URL	[http://ir.fjirsm.ac.cn/handle/350002/6120]
专题	福建物质结构研究所_中科院福建物质结构研究所_期刊论文
推荐引用方式 GB/T 7714	D. K. Cao,Y. Z. Li,L. M. Zheng. Layered cobalt(II) and nickel(II) diphosphonates showing canted antiferromagnetism and slow relaxation behavior[J]. Inorganic Chemistry,2007,46(18):7571-7578.
APA	D. K. Cao,Y. Z. Li,&L. M. Zheng.(2007).Layered cobalt(II) and nickel(II) diphosphonates showing canted antiferromagnetism and slow relaxation behavior.Inorganic Chemistry,46(18),7571-7578.
MLA	D. K. Cao,et al."Layered cobalt(II) and nickel(II) diphosphonates showing canted antiferromagnetism and slow relaxation behavior".Inorganic Chemistry 46.18(2007):7571-7578.