Magnetization relaxation dynamics of a rare coordinatively unsaturated Co(II) complex: experimental and theoretical insights

Chinmoy Das; Amaleswari Rasamsetty; Shalini Tripathi; Maheswaran Shanmugam

doi:10.1039/d0cc05963c

Magnetization relaxation dynamics of a rare coordinatively unsaturated Co(II) complex: experimental and theoretical insights

Chem Commun (Camb). 2020 Nov 3;56(87):13397-13400. doi: 10.1039/d0cc05963c.

Authors

Chinmoy Das¹, Amaleswari Rasamsetty², Shalini Tripathi², Maheswaran Shanmugam²

Affiliations

¹ Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India. eswar@chem.iitb.ac.in and Current address: AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
² Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, Maharashtra, India. eswar@chem.iitb.ac.in.

PMID: 33035279
DOI: 10.1039/d0cc05963c

Abstract

A robust and unusual three coordinate Co(ii) complex [Li(DME)3][Co(L)3] (1, where L = Lithium (2,6-diisopropylphenyl) amide and DME = Dimethoxyethane) shows easy plane magnetic anisotropy (D) which is validated by variable temperature X-band EPR studies. 1 also registered with the largest anisotropic barrier (51.1 K, τ0 = 1.98 × 10-8 s; Hdc ≠ 0) to the magnetization reversal among the three coordinate Co(ii) complexes. The role of its geometry on the SH parameters and the experimental observations are rationalized by theoretical calculations including the origin of magnetic anisotropy.