Hydrogen-bonding interactions and magnetic relaxation dynamics in tetracoordinated cobalt(ii) single-ion magnets

Abstract

Zero field slow magnetic relaxation was observed in two cobalt(ii) complexes with 1-D chain hydrogen-bonded structures.

Field‐Induced Single‐Ion Magnetic Behavior in Two Mononuclear Cobalt(II) Complexes

“…The existence of weak intermolecular hydrogen bonds and weak π⋅⋅⋅π interactions suggests that relatively weak intermolecular magnetic interactions occur in the two complexes, and these intermolecular interactions may have a significant effect on the magnetic properties of 1 and 2 …”

“…Cobalt(II) SIMs with coordination numbers between two and eight have been extensively studied in recent years . although geometrically stable six‐coordinated cobalt(II) SIMs have been reported in large numbers,– there are relatively few studies on five‐coordinated cobalt(II) SIMs . Recent advances in cobalt(II) SIMs reveal that imposing a trigonal bipyramidal geometry around the cobalt(II) ion could generate cobalt(II) SIMs with large magnetic anisotropy .…”

Stepwise Synthesis, Hydrogen-Bonded Supramolecular Structure, and Magnetic Property of a Co–Mn Heterodinuclear Complex

“…Discrete cobalt and manganese complexes have been attracting much attention owing to their fascinating magnetic properties such as single-molecule magnet behavior [1][2][3][4][5]. Heteronuclear complexes are strong candidates for such a property because of the magnetic coupling between different paramagnetic metal ions [6].…”

Synthesis and Crystal Structure of Bis[2-(2-imidazolinyl)-6-methoxyphenolato]zinc(II)

“…High-spin octahedral or pseudo-tetrahedral cobalt(II) complexes have been attracting much attentions because they are potential candidates for single-ion magnets (SIMs). [1][2][3][4] Although many SIMs with a first-row transition-metal have been reported, 5 most of them do not exhibits a slow magnetic relaxation behavior in the absence of an external field due to fast relaxation via quantum tunneling. To prepare a zero-field SIM, not only a strong magnetic anisotropy, but also the molecular alignment of SIMs in the crystal, is important.…”