Theoretical Study of Magnetic Properties of Oxovanadium(IV) Complex Self-Assemblies with Tetradentate Schiff Base Ligands

2011 ◽  
Vol 115 (26) ◽  
pp. 8465-8473 ◽  
Author(s):  
Naoki Matsuoka ◽  
Masanobu Tsuchimoto ◽  
Naoki Yoshioka
2015 ◽  
Vol 44 (28) ◽  
pp. 12863-12870 ◽  
Author(s):  
Piya Seth ◽  
Sanjib Giri ◽  
Ashutosh Ghosh

Three new Mn(iii) complexes of salen type Schiff base ligands have been synthesized in order to correlate their magnetic properties with structural parameters, theoretically and experimentally.


Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6908
Author(s):  
Tamara A. Bazhenova ◽  
Vyacheslav A. Kopotkov ◽  
Denis V. Korchagin ◽  
Yuriy V. Manakin ◽  
Leokadiya V. Zorina ◽  
...  

A series of six seven-coordinate pentagonal-bipyramidal (PBP) erbium complexes, with acyclic pentadentate [N3O2] Schiff-base ligands, 2,6-diacetylpyridine bis-(4-methoxybenzoylhydrazone) [H2DAPMBH], or 2,6-diacethylpyridine bis(salicylhydrazone) [H4DAPS], and various apical ligands in different charge states were synthesized: [Er(DAPMBH)(C2H5OH)Cl] (1); [Er(DAPMBH)(H2O)Cl]·2C2H5OH (2); [Er(DAPMBH)(CH3OH)Cl] (3); [Er(DAPMBH)(CH3OH)(N3)] (4); [(Et3H)N]+[Er(H2DAPS)Cl2]− (5); and [(Et3H)N]+[Y0.95Er0.05(H2DAPS)Cl2]− (6). The physicochemical properties, crystal structures, and the DC and AC magnetic properties of 1–6 were studied. The AC magnetic measurements revealed that most of Compounds 1–6 are field-induced single-molecule magnets, with estimated magnetization energy barriers, Ueff ≈ 16–28 K. The experimental study of the magnetic properties was complemented by theoretical analysis based on ab initio and crystal field calculations. An experimental and theoretical study of the magnetism of 1–6 shows the subtle impact of the type and charge state of the axial ligands on the SMM properties of these complexes.


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