EPR and magnetic studies of a novel copper metal organic framework (STAM-I)

H. El Mkami, M. I.H. Mohideen, C. Pal, A. McKinlay, O. Scheimann, R. E. Morris

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

The magnetic interaction between dinuclear copper (II) in a new copper carboxylate compound, STAM-1, has been investigated by means of EPR and SQUID measurements. The powder EPR spectra, measured at 9.80 and 34.5 GHz and at different temperatures, show the typical lines of the triplet state (S = 1), attributed to Cu 2+-Cu 2+ dimers, in addition of a temperature dependent central lines. The zero field splitting parameters obtained are |D obs| = 0.337 cm -1 and E ∼ 0. Magnetic susceptibility data, performed in the range 1.8-300 K, shows a strong antiferromagnetic exchange coupling between the Cu 2+ centers in the paddle-wheel units with the exchange coupling constant 2J = -334 ± 4 cm -1.

Original languageBritish English
Pages (from-to)17-21
Number of pages5
JournalChemical Physics Letters
Volume544
DOIs
StatePublished - 20 Aug 2012

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