1993
DOI: 10.1080/00268979300101521
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Host spin-lattice relaxation narrowing and the electron paramagnetic resonance of Mn(II) in single crystals of hexakis(pyridineN-oxide)cobalt(II) complexes

Abstract: The electron paramagnetic resonance spectra of Mn(CsHsNO)6.X2 (X -CIO4, BF4 and NO3 ) doped in single crystals of isomorphous paramagnetic Co(C5 HsNO)6. X2 are studied at various temperatures. Zero-field splitting in all three crystals is axially symmetric and the magnitude olD is unusually large for an octahedral coordination polyhedron with all ligands identical. The sharp resonance of Mn(II) in the paramagnetic host observed at high temperatures is interpreted in terms of random modulation of the dipolar in… Show more

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Cited by 12 publications
(4 citation statements)
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“…Copper [33][34][35]50], similar to Cu(II) doped PCDC. The two dimensional fluxional behaviour of the CuN 2 O 4 chromophore in these systems were interpreted in terms of three in equivalent J-T valleys [50], as well as dynamic vibronic coupling [34]. In the first model, the temperature Fig.…”
Section: Resultsmentioning
confidence: 95%
“…Copper [33][34][35]50], similar to Cu(II) doped PCDC. The two dimensional fluxional behaviour of the CuN 2 O 4 chromophore in these systems were interpreted in terms of three in equivalent J-T valleys [50], as well as dynamic vibronic coupling [34]. In the first model, the temperature Fig.…”
Section: Resultsmentioning
confidence: 95%
“…If D and A are of the same sign, the separations of hyperfine lines will be greater in the low field sextet than the high field sextet and vice versa. The sign of A is invariably negative in all high spin Mn(II) complexes [30] due to core polarization of inner orbitals of Mn(II) and assumed to be the same for the present case. In this present study, the separation of the sextets increases towards the high field which infers that the sign of D is positive.…”
Section: Relative Signs Of D and Amentioning
confidence: 87%
“…The attention towards Co host-lattice happens because the dipolar interaction between Co(II) and Mn(II) ions is thought to be reduced by host spin-lattice relaxation narrowing. This will result in fairly well-resolved EPR spectra of Mn(II) ions in some cobalt lattices [10][11][12][13][14][15][16]. In most of the cases studied so far, the zero-field energy is found to be linear dependent on temperature [17,18].…”
Section: Introductionmentioning
confidence: 97%