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Electronic and Magnetic Properties of a Gadolinium(III) Schiff Base Complex
Author(s) -
Upadhyay Apoorva,
Das Chinmoy,
Shanmugam Muralidharan,
Langley Stuart K.,
Murray Keith S.,
Shanmugam Maheswaran
Publication year - 2014
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.201402219
Subject(s) - chemistry , electron paramagnetic resonance , magnetization , magnetic susceptibility , gadolinium , crystallography , ion , anisotropy , schiff base , crystal structure , single crystal , ligand (biochemistry) , nuclear magnetic resonance , analytical chemistry (journal) , magnetic field , biochemistry , receptor , quantum mechanics , chromatography , physics , organic chemistry
A mononuclear Gd III Schiff base complex of formula [Gd(HL) 2 (NO 3 ) 3 ] ( 1 ), where HL = 2‐methoxy‐6‐[( E )‐phenyliminomethyl]phenol, has been isolated and its structure was determined by single‐crystal X‐ray diffraction. 1 H NMR spectroscopic data reveal the zwitterionic nature of the HL ligand upon coordination with the Gd III ion. Direct current (dc) magnetic susceptibility and X‐band EPR measurements were performed to probe the electronic and magnetic properties of complex 1 . The susceptibility and magnetization data were fitted simultaneously, resulting in spin‐Hamiltonian parameters: S = 7/2, g = 2.018, and D = 0.108 cm –1 . The extracted parameters are in good agreement with the values obtained by fitting the temperature‐dependent polycrystalline X‐band EPR spectra of 1 ( S = 7/2, g = 2.005, and D = 0.0815 cm –1 ; E / D = 0.08). EPR dilution experiments performed on 1 indicates strongly that the anisotropy arises solely from the Gd III ion with undetectably small or no contribution from spin–spin exchange interactions.