Investigation of easy-plane magnetic anisotropy in P-ligand square-pyramidal CoII single ion magnets

Amit Kumar Mondal; Jesús Jover; Eliseo Ruiz; Sanjit Konar

doi:10.1039/c7cc02584j

Investigation of easy-plane magnetic anisotropy in P-ligand square-pyramidal Co^II single ion magnets

Chem Commun (Camb). 2017 May 9;53(38):5338-5341. doi: 10.1039/c7cc02584j.

Authors

Amit Kumar Mondal¹, Jesús Jover, Eliseo Ruiz, Sanjit Konar

Affiliation

¹ Department of Chemistry, Indian Institute of Science Education and Research, (IISER), Bhopal By-pass Road, Bhauri, Bhopal-462066, India. skonar@iiserb.ac.in.

PMID: 28447677
DOI: 10.1039/c7cc02584j

Abstract

In this work we report two pentacoordinated Co^II-P₄X₁ Single Ion Magnets (SIMs) based on P-donor ligands. The tetradentate ligand tris[2-(diphenylphosphino)ethyl]phosphine allows the obtention of the isostructural square pyramidal [Co(PP₃)Cl]·ClO₄ (1) and [Co(PP₃)Br]·ClO₄ (2) complexes. Consistent theoretical and experimental studies indicate that these complexes have a high spin (S = 3/2) ground state and suggest that the relaxation dynamics is governed by ground state quantum tunneling, whereas its temperature dependence is directed by optical or acoustic Raman processes.