0000000000008806
AUTHOR
J.r. Galán-mascarós
Synthesis and characterization of [Fe(III)(qsal)2][M(III)(pds)2] (M=Cu, Au)
Abstract Salts of the Fe(III) spin crossover cation [FeIII(qsal)2]+ (qsalH = N-(8-quinolyl)salicylaldimine) and monoanions [MIII(pds)2]− (M = Cu, Au; pds = pirazine-2,3-diselenolate) with formula [FeIII(qsal)2][MIII(pds)2] were prepared and characterized by single crystal X-ray diffraction and magnetic measurements. These two salts present magnetic properties essentially due to the FeIII centres in the high-spin state (S = 5/2), and do not have any spin transition.
Spontaneous Magnetization in Ni−Al and Ni−Fe Layered Double Hydroxides
Layered double hydroxides containing paramagnetic Ni (II) and diamagnetic/paramagnetic Al (III)/Fe (III) ions have been prepared and characterized. Ni 2Al(OH) 6(NO 3). nH 2O ( 1), Ni 2Fe(OH) 6(NO 3). nH 2O ( 2), Ni 2Fe(OH) 6(C 6H 8O 4) 0.5. nH 2O ( 3), and Ni 2Fe(OH) 6(C 10H 16O 4) 0.5. nH 2O ( 4) were prepared by coprecipitation at controlled pH as polycrystalline materials with the typical brucite-like structure, with alternating layers of hydroxide and the corresponding anions, which determine the interlayer separation. Magnetic studies show the appearance of spontaneous magnetization between 2 and 15 K for these compounds. Interestingly, the onset temperature for spontaneous magnetizati…