Structures and magnetism of azide- and carboxylate-bridged metal(II) systems derived from 1,2-bis(N-carboxymethyl-4-pyridinio)ethane

doi:10.1039/b919096a

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	Structures and magnetism of azide- and carboxylate-bridged metal(II) systems derived from 1,2-bis(N-carboxymethyl-4-pyridinio)ethane
	Ma, Yu 1; Wen, Yan-Qing 1; Zhang, Jian-Yong 1; Gao, En-Qing 1; Liu, Cai-Ming 2
刊名	DALTON TRANSACTIONS
	2010
卷号	39 期号:7 页码:1846-1854
ISSN号	1477-9226
DOI	10.1039/b919096a
英文摘要	Four coordination polymers of different transition metal ions with azide and the zwitterionic dicarboxylate ligand 1,2-bis(N-carboxymethyl-4-pyridinio)ethane (bcpe) were synthesized, and structurally and magnetically characterized. They are formulated as [M(2)(bcpe)(N(3))(4)]center dot H(2)O (M = Mn, 1; Co, 2; and Ni, 3) and [Cu(3)(bcpe)(N(3))(6)]center dot(H(2)O)(2) (4). In the isomorphous compounds 1-3, octahedral metal ions are linked by the mixed (mu(2)-syn,syn-COO)(mu(2)-EO-N(3))(2) triple bridges (EO = end-on) to give anionic uniform chains, which are cross-linked by the cationic bis(pyridinium) spacers to produce two-dimensional coordination layers. Magnetic studies demonstrated that the magnetic coupling through the mixed triple bridge is antiferromagnetic in the Mn(II) compound (1) but ferromagnetic in the Co(II) and Ni(II) species (2 and 3). Compound 4 also consists of two-dimensional coordination layers in which Cu(II) chains are interlinked by the organic spacers, but the chain has mixed mu(2)-EO-azide, mu(3)-EO-azide and mu(2)-O(carboxylate) bridges and features tetranuclear dicubane-based units sharing Cu ions or alternatively linear trinuclear units connected by long axial Cu-N/O bonds. Magnetic studies suggested that the Cu(II) ions linked by the double azide bridges in the equatorial-equatorial fashion are strongly coupled to give a ferromagnetic S = 3/2 ground state for the trinuclear units, with very weak antiferromagnetic interactions through the equatorial-axial bridges between the units.
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000274207100030
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/69603]
专题	中国科学院化学研究所
通讯作者	Gao, En-Qing
作者单位	1.E China Normal Univ, Dept Chem, Shanghai Key Lab Green Chem & Chem Proc, Shanghai 200062, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Ma, Yu,Wen, Yan-Qing,Zhang, Jian-Yong,et al. Structures and magnetism of azide- and carboxylate-bridged metal(II) systems derived from 1,2-bis(N-carboxymethyl-4-pyridinio)ethane[J]. DALTON TRANSACTIONS,2010,39(7):1846-1854.
APA	Ma, Yu,Wen, Yan-Qing,Zhang, Jian-Yong,Gao, En-Qing,&Liu, Cai-Ming.(2010).Structures and magnetism of azide- and carboxylate-bridged metal(II) systems derived from 1,2-bis(N-carboxymethyl-4-pyridinio)ethane.DALTON TRANSACTIONS,39(7),1846-1854.
MLA	Ma, Yu,et al."Structures and magnetism of azide- and carboxylate-bridged metal(II) systems derived from 1,2-bis(N-carboxymethyl-4-pyridinio)ethane".DALTON TRANSACTIONS 39.7(2010):1846-1854.