Room-temperature mixed spin state of Co3+ in Sr2Co0.02Ga0.98NbO6 double perovskite: combined NMR and EPR studies in a potential inorganic pigment
SIMPSON, Struan
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
LAWRENCE, Gaynor
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
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Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
SIMPSON, Struan
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
LAWRENCE, Gaynor
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
< Réduire
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
The Chemistry Department
Langue
en
Article de revue
Ce document a été publié dans
Journal of Physical Chemistry C. 2022-05-19, vol. 126, n° 19, p. 8450-8460
American Chemical Society
Résumé en anglais
The structural and optical properties of the refractory oxides Sr2CoxGa1–xNbO6 (x = 0 and 0.02) were investigated using powder X-ray diffraction; 93Nb, 71Ga, and 59Co magic-angle spinning nuclear magnetic resonance; electron ...Lire la suite >
The structural and optical properties of the refractory oxides Sr2CoxGa1–xNbO6 (x = 0 and 0.02) were investigated using powder X-ray diffraction; 93Nb, 71Ga, and 59Co magic-angle spinning nuclear magnetic resonance; electron spin resonance; and UV–vis–NIR absorption. A flux using SrCl2 versus a ball milling strategy to stabilize rock salt-ordered Sr2CoxGa1–xNbO6 (x = 0 and 0.02) at low temperature was underlined. Sr2Co0.02Ga0.98NbO6 showed a tetragonal I4/m crystalline structure with a slight lattice distortion index in the range of 0.04. Combined spectroscopic studies, further supported by UV–vis–NIR absorption analysis, definitively indicate an unusual mixed spin state of Co3+ at room temperature in the Sr2Co0.02Ga0.98NbO6 double perovskite that might be of interest for pale-brown inorganic pigments.< Réduire
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