Copper diphosphonates with zero-, one- and two-dimensional structures: Ferrimagnetism in layer compound Cu3(ImhedpH)2·2H2O [ImhedpH4 = (1-C3H3N2)CH2C(OH)(PO3H2)2]

Deng Ke Cao, Xiao Ji Xie, Yi Zhi Li, Li Min Zheng

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Reactions of CuSO4 with 2-(1-imidazole)-1-hydroxy-1,1′-ethylidenediphosphonic acid (ImhedpH4) under hydrothermal conditions at different temperatures lead to four new metal phosphonates: Cu(ImhedpH3)2(H2O)·2H2O (1), Cu(ImhedpH3)2 (2), Cu3(ImhedpH2)2(ImhedpH3)2·4H2O (3), and Cu3(ImhedpH)2·2H2O (4). Compounds 1 and 2 have mononuclear structures in which the Cu atoms adopt square pyramidal and square planar geometries, respectively. In compound 3, a chain structure is observed where the Cu3(ImhedpH2)2(ImhedpH3)2 trimer units are connected by edge-sharing of the (Cu(2)O5) square pyramids. Compound 4 exhibits a layer structure made up of Cu3(ImhedpH)2 trimer units. The connection of trimers through corner-sharing of (Cu(1)O4) and (CPO3) tetrahedra results in a two-dimensional layer containing 8- and 16-membered rings. The imidazole groups are grafted on the two sides of the layer. Magnetic studies reveal that ferromagnetic interactions are mediated in 3, while for compound 4, ferrimagnetism is observed below 5.8 K.

Original languageEnglish
Pages (from-to)5008-5015
Number of pages8
JournalJournal of the Chemical Society. Dalton Transactions
Issue number37
DOIs
StatePublished - 7 Aug 2008
Externally publishedYes

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