Slowing magnetic relaxation with open-shell diluents

Spin canting and slow magnetic relaxation in mononuclear cobalt(ii) sulfadiazine ternary complexes

“…As described in the upcoming sections, the Ni(II) based counterpart 3 was synthesized in order to simulate a diamagnetic dilution of 2 because it was not possible to synthesize the isostructural Zn(II) counterpart. This unconventional strategy is based on a recently published work reported by Zadrozny and coworkers, 64 where they took advantage of the positive D value of the Ni(II) counterpart in (Ph 4 P) 2 [M(SPh) 4 ] (where M is Mn(II), Fe(II), Co(II) or Ni(II) in their study) that simulates a diamagnetic ground state (M S = 0). Due to the lower expected magnetic anisotropy, the χ M T curve of 3 does The dashed lines represent the first and second excitations, which contribute to the zfs parameters of the compound.…”

Aerogel-Based Single-Ion Magnets: A Case Study of a Cobalt(II) Complex Immobilized in Silica

“…In SIMs, the magnetization is stored within single ions, due to the very slow relaxation of their magnetic moments [ 7 ]. In order to avoid a magnetic exchange between paramagnetic ions, the ions must be spatially separated by a diamagnetic medium, thus resulting in magnetic dilution [ 8 , 9 ].…”

“…The immobilization of Fe 3 O 4 nanoparticles onto a graphene aerogel surface resulted in an excellent electromagnetic shielding material [ 52 ]. Interestingly, aerogels can even be constructed from magnetic nanoparticles alone, e.g., Fe 1.3 Ni 0.7 P [ 9 ] or Fe 3 O 4 [ 53 ].…”

Binuclear cobalt(ii) and two-dimensional manganese(ii) coordination compounds self-assembled by mixed bipyridine-tetracarboxylic ligands with single-ion magnet properties

“…3 In recent years, much interest has been focused on the design and construction of 3d and 4f SIMs. 4,5 After the initial discovery of slow relaxation in a Fe 2+ complex with a four-coordinate trigonal pyramidal structure, 6 numerous mononuclear 3d complexes featuring Co 1+/2+ , 7–9 Fe 1+/2+/3+ , 10 Mn 2+/3+ , 11,12 Ni 1+/2+ , 13 and other 3d metal centers, with varying coordination numbers and molecular symmetries, have been synthesized and identified as SIMs. The large magnetic anisotropy in these reported complexes plays a vital effect on slow magnetic relaxation.…”