Three heterometallic dinuclear compounds, [MDy(L)(Pc)(ROH)]·ROH (R = CH, M = Ni (), Zn (); R = CH, M = Zn ()), were stepwise synthesized based on phthalocyanine (HPc) and one tripodal Schiff-base ligand 1,1,1-tris[(salicylideneamino)methyl]ethane (HL). All of them have been studied structurally and magnetically. The six-coordinate M ion and the seven-coordinate Dy ion are bridged by two phenolic oxygen atoms to form an M-Ln heterodinuclear unit. Magnetic measurements indicate that the ferromagnetic Ni-Dy interaction is operative in compound and all three compounds exhibit the field-induced slow relaxation of magnetizations. In particular, compounds and have the improved magnetic performance. Ab initio calculations indicate that the weak Ni-Dy interaction decreases the energy barrier, while the replacement of the paramagnetic Ni ion by the diamagnetic Zn in compound and not only controls the magnetic interaction but also alters the local magnetic axes of Dy ions to optimize the magnetic relaxation behavior.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.inorgchem.9b01179 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Heteronuclear Ni(ii)-Ln(iii) (Ln = La, Pr, Tb, Dy) complexes: synthesis and single-molecule magnet behaviour.
Dalton Trans
February 2016
Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India.
The reaction of hydrated nickel(II) salts (chloride or nitrate) and hydrated lanthanide nitrate salts with the Schiff base ligand 2-methoxy-6-[(E)-phenyliminomethyl] phenol (HL) in methanol resulted in the isolation of three isostructural linear heterometallic trinuclear complexes and a heterometallic tetranuclear complex. The molecular structures of these complexes were determined via single crystal X-ray diffraction revealing molecular structures of formulae [Ni2La(L-)6](NO3)0.55(OH)0.
View Article and Find Full Text PDFChiral crystallization of a heterodinuclear Ni-Ln series: comprehensive analysis of the magnetic properties.
Inorg Chem
November 2012
Institute of Physical Chemistry, Splaiul Independentei 202, Bucharest 060021, Romania.
Four heterodinuclear (H(2)O)(2)NiL-Ln(NO(3))(3) complexes (Ln = Tb, Dy, Er, Yb) with a double phenoxo bridge coming from the dideprotonated Schiff-base ligand are synthesized and characterized by crystal and powder X-ray diffraction studies. This series of compounds devoid of any chiral center, crystallizes in a noncentrosymmetric space group P2(1), as the previously described (H(2)O)(2)NiL-Gd(NO(3))(3) equivalent. All four complexes are ferromagnetically coupled.
View Article and Find Full Text PDFNature of copper(II)-lanthanide(III) magnetic interactions and generation of a large magnetic moment with magnetic anisotropy of 3d-4f cyclic cylindrical tetranuclear complexes [CuIILLnIII(hfac)2]2, (H3L = 1-(2-hydroxybenzamido)-2-(2-hydroxy-3-methoxybenzylideneamino)ethane and Hhfac = hexafluoroacetylacetone, LnIII = Eu, Gd, Tb, Dy).
Inorg Chem
January 2003
Department of Chemistry, Faculty of Science, Kumamoto University, Kurokami 2-39-1, Kumamoto 860-8555, Japan. Facolta di Farmacia, Università degli Studi G. D'Annunzio, I-66100 Chieti, Italy.
A cyclic cylindrical 3d-4f tetranuclear structure, in which the 3d and 4f magnetic ions are arrayed alternately, has been found to be a suitable molecular design to produce a large magnetic moment and large magnetic anisotropy. Complexes 3-10 with the chemical formula [MLLn(hfac)2]2 ((MII, LnIII) = (Cu, Eu) (3), (Cu, Gd) (4), (Cu, Tb) (5), (Cu, Dy) (6), (Ni, Eu) (7), (Ni, Gd) (8), (Ni, Tb) (9), (Ni, Dy) (10)) have been synthesized, where H3L = 1-(2-hydroxybenzamido)-2-(2-hydroxy-3-methoxybenzylideneamino)ethane and Hhfac = hexafluoroacetylacetone. The powder X-ray diffractions and FAB-mass spectra demonstrated that these complexes assume a similar tetranuclear structure.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!