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Tetranuclear and Octanuclear Cobalt(II) Citrate Cluster Single Molecule Magnets
Author(s) -
Moubaraki Boujemaa,
Murray Keith S.,
Hudson Timothy A.,
Robson Richard
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200800611
Subject(s) - chemistry , cubane , isostructural , cobalt , crystallography , moiety , cluster (spacecraft) , magnetic relaxation , molecule , magnetization , stereochemistry , relaxation (psychology) , inorganic chemistry , crystal structure , organic chemistry , social psychology , psychology , physics , quantum mechanics , computer science , magnetic field , programming language
In a follow‐up study of the cobalt(II) member 1 of a family of isostructural cubane clusters of type [C(NH 2 ) 3 ] 8 [M II 4 (cit) 4 ]·8H 2 O (cit = citrate, M = Mg, Mn, Fe, Co, Ni, Zn) by measuring AC magnetic susceptibilities, as a function of frequency, this compound clearly displays behaviour typical of magnetization reversal and slow magnetic relaxation (Δ E = 13.1 K, τ o = 8.4 × 10 –7 s). A related octanuclear cluster [Co 8 (C 4 O 7 ) 4 (H 2 O) 12 ] · 24H 2 O ( 2 ) that contains a [Co 4 (C 4 O 7 ) 4 ] cubane moiety, behaves likewise (Δ E = 20.5 K, τ o = 1.0 × 10 –7 s).(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)