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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, Yu1; Wen, Yan-Qing1; Zhang, Jian-Yong1; Gao, En-Qing1; Liu, Cai-Ming2
2010
Source PublicationDALTON TRANSACTIONS
ISSN1477-9226
Volume39Issue:7Pages:1846-1854
AbstractFour 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.
DOI10.1039/b919096a
Indexed BySCI
Language英语
WOS IDWOS:000274207100030
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:38[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/69604
Collection中国科学院化学研究所
Corresponding AuthorGao, En-Qing
Affiliation1.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
Recommended Citation
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.
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