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

Abstract

A robust and an unusual three coordinate Co(II) complex [Li(DME)3] [Co(L)3] (1, where L = Lithium (2,6-diisopropylphenyl) amide and DME = Dimethoxyethane) shows an easy plane magnetic anisotropy (D) which...

A Machine Learning Approach to Decipher the Origin of Magnetic Anisotropy in Three-Coordinate Cobalt Single-Ion Magnets

“…The highest pseudo symmetry point group of D3h or C3v in this class of molecules has a unique principle axis which can generate magnetic anisotropy. A quick Cambridge structural database search reveals a report of 140 three-coordinate Co complexes with various donor atoms exemplifying the versatility, 40,41 Although there are several correlations and design clues offered for various Co SIMs with a coordination number starting from four 14 , to the best of our knowledge, such an endeavour is missing for three coordinate Co complexes, despite its potential.…”

Structures and magnetic anisotropies of two seven-coordinate Co(ii)–nitrate complexes showing slow magnetic relaxation

“…7 Great effort is devoted to constructing SIMs with low coordination numbers, low oxidation states and high symmetry because of their strong magnetic anisotropy. 8,9 A record energy barrier of 450 cm −1 was found for a two-coordinate linear Co( ii )-SIM, Co(C(SiMe 2 ONaph) 3 ) 2 (Me = methyl, Naph = naphthyl group). 8 a However, low-coordinate SIMs are usually unstable and difficult to prepare.…”

Field induced single ion magnet behavior in CoII complexes in a distorted square pyramidal geometry

“…[82][83][84][85] Thus, for example, Shanmugam and co-workers have demonstrated that the halide ion plays a pivotal role in determining the sign and magnitude of the D parameter. [86][87][88][89][90] This approach has also been utilized by other research groups. [91][92][93][94][95][96] Moreover, along with the ligand field strength arising from the first coordination sphere of the transition metal ions, the secondary effects imposed by counter anions/cations can also affect the D parameter.…”