Publication Type Journal Article
Title A Mixed Valence (CoCo2III)-Co-II Field-Supported Single Molecule Magnet: Solvent-Dependent Structural Variation
Authors Susanta Hazra Cyril Rajnák Jan Titis M. Fátima C. Guedes da Silva Roman Boca Armando J.L. Pombeiro
Groups CCC
Journal MOLECULES
Year 2021
Month February
Volume 26
Number 4
Pages
Abstract One-pot reaction of the Schiff base N,N -ethylene bis(salicylaldimine) (H2L), CoCl2 center dot 6H(2)O, and [Ph2SnCl2] in acetone produces the mixed valence (CoCo2III)-Co-II compound [(CoCo2III)-Co-II(mu-L)(2)(Ph)(2)(mu-Cl)(2)]center dot(CH3)(2)CO center dot H2O (1). Our recent study already revealed that the same reaction mixtures in methanol or ethanol produced a heterometallic (SnCoIII)-Co-IV (2) or monometallic Co-III complex (3), respectively. Comparison of these organometallic systems shows that the 2,1-intermetallic Ph shift occurs in any of those solvents, but their relevant structural features (mononuclear, dinuclear-heterometallic, and trinuclear mixed valence) are solvent dependent. Geometrical structural rotation is also discussed among the related organometallic (CoCo2III)-Co-II systems. The AC magnetic susceptibility measurements indicate that 1 is a single molecule magnet (SMM), exhibiting a field-induced slow magnetic relaxation with two modes. The relaxation time for the low-frequency channel is as slow as tau similar to 0.6 s at T = 2.0 K and B-DC = 1.0 T.
DOI http://dx.doi.org/10.3390/molecules26041060
ISBN
Publisher
Book Title
ISSN
EISSN 1420-3049
Conference Name
Bibtex ID ISI:000624157700001
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