학술논문
Influence of chirality on the electron spin resonance in molecular magnets [Mn.sup.II(HL)([H.sub.2]O)][Mn.sup.III(CN).sub.6] * 2[H.sub.2]O with chiral ligands L
Document Type
Report
Author
Source
Physics of the Solid State. July, 2008, Vol. 50 Issue 7, p1303, 5 p.
Subject
Language
English
ISSN
1063-7834
Abstract
Chiral and racemic molecular ferrimagnets [Mn.sup.II(HL)([H.sub.2]O)][Mn.sup.III(CN).sub.6] * 2[H.sub.2]O, where L = S-or R-1,2-diaminopropane for chiral samples (S-pn, R-pn) and L = rac-pn for racemic samples, are investigated by the electron spin resonance technique. It is revealed that the electron spin resonance spectra of the chiral and racemic samples differ from each other at temperatures below the Curie temperature T .sub.C = 21 K. The maximum in the temperature dependence of the integrated magnetic susceptibility [chi](T) calculated by the double integration of the line centered at a negative field of -250 Oe for the racemic samples is broadened as compared to the maxima in the corresponding dependences for the enantiomers of the chiral samples with "right" (R) and "left" (S) symmetry. The new compounds under investigation differ from the previously synthesized crystals by the strong spin-orbit interaction between Mn.sup.3+ ions, which leads to a dependence of their magnetic properties on the chirality of the structure.