Field-induced oscillation of magnetization blocking barrier in a holmium metallacrown single-molecule magnet

Magnetization Dynamics on Isotope‐Isomorphic Holmium Single‐Molecule Magnets

“…This hyperfine splitting has a huge effect in blocking the quantum tunneling of magnetization, which effectively make this channel be the bottleneck of magnetization relaxation on the whole investigated temperature range. [32] Observations of the oscillations in the field-dependent t (Figure S15) indeed confirm this conclusion.…”

“…[20][21][22][23][24][25][26][27] In fact, they are unlimited to inherently possess magnetization dynamics arising from electronic spin, but potentially collaborate with nuclear spin. [28][29][30][31][32] In terms of the above, isotope effect may regulate the properties of SMMs and bring novel and interesting quantum phenomena.…”

“…As far as we know, isotope effects on magnetic relaxation in the research of SMMs are rarely reported. [29][30][31][32][33][34][35][36][37][38][39] Most of them are isotopic enriched or naturally-isotope-pure for the paramagnetic metal centers, like Dy III , Ho III , Er III or Yb III [29][30][31][32][33][34][35][36][37][40][41][42][43][44] clearly revealing that the nuclear spin of the metal center have significant effects on magnetic behavior. However, magnetization dynamics on the diamagnetic coordination ligands are scarcely studied, only two of which were tried to deuterate the ligand and reported the isotope effects.…”

Crystal structure of a TbIII–CuII glycinehydroxamate 15-metallacrown-5 sulfate complex

“…The 15-metallacrown-5 complexes are 3d-4f metallamacrocyclic assemblies, which can be easily obtained from one-step reactions between an -substituted hydroxamic acid and the corresponding salts of transition metals and lanthanides (Stemmler et al, 1999;Pavlishchuk et al, 2011Pavlishchuk et al, , 2019. Compounds bearing 15-metallacrown-5 {LnCu 5 } 3+ units have demonstrated the ability to serve as sensors (Zabrodina et al, 2018), can absorb and adsorb various small molecules (Lim et al, 2010;Pavlishchuk et al, 2014;Ostrowska et al, 2016) and display SMM behaviour (Wang et al, 2019(Wang et al, , 2021Zaleski et al, 2006;Wu et al, 2021). Taking into account the fact that 15-metallacrowns-5 are also suitable building blocks for the generation of porous coordination polymers and discrete assemblies (Pavlishchuk et al, 2017a(Pavlishchuk et al, ,b, 2018, the synthesis of ISSN 2056-9890 new examples of this class of metallamacrocyclic assemblies and studies of their structural features are of particular interest.…”

Switching the Local Symmetry from D5h to D4h for Single-Molecule Magnets by Non-Coordinating Solvents

“…This is well demonstrated by Tong et al who reported a text-book example of solvent induced symmetry transformation between quasi-D 5h and quasi-O h by losing its one coordinated methanol molecule when exposed to the dry air and then recovered the structure by soaking in methanol for one Inorganics 2021, 9, 64 2 of 10 day [19]. The compounds with identical ligands are provided with completely different magnetic properties, as well as the effective energy barrier (U eff ) and blocking temperature (T B ), which are two pivotal indexes evaluating the properties of SMMs [20][21][22].…”