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Nature 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. 2003 Jan 27; 42(2):398-408.IC

Abstract

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. The crystal structures of 4 and 5 showed that each complex has a cyclic cylindrical tetranuclear CuII2LnIII2 structure, in which the CuII complex functions as a "bridging ligand-complex" to two adjacent LnIII ions. The temperature-dependent magnetic susceptibilities from 2 to 300 K and the field-dependent magnetizations at 2 K from 0 to 5 T have been measured for four pairs of CuII2LnIII2 and NiII2LnIII2, in which compound NiII2LnIII2 containing diamagnetic NiII ion was used as the reference complex to evaluate the CuII-LnIII magnetic interaction. Comparison of the magnetic properties of the CuII2LnIII2 complex with those of the corresponding NiII2LnIII2 complex showed that the magnetic interaction between CuII and EuIII ions is weakly ferromagnetic and that between CuII and either of GdIII, TbIII, and DyIII ions is ferromagnetic. Complex CuII2GdIII2, 4, has an S = 8 spin ground state, due to the ferromagnetic spin coupling between SGd = 7/2 and SCu = 1/2 with coupling constants of J1 = +3.1 cm-1 and J2 = +1.2 cm-1. The magnetic measurements showed that compounds 5 and 6, CuII2LnIII2 (LnIII = Tb, Dy), exhibit large magnetic moments and large magnetic anisotropy due to the LnIII ion.

Authors+Show Affiliations

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.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

12693220

Citation

Kido, Takafumi, et al. "Nature 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)." Inorganic Chemistry, vol. 42, no. 2, 2003, pp. 398-408.
Kido T, Ikuta Y, Sunatsuki Y, et al. Nature 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. 2003;42(2):398-408.
Kido, T., Ikuta, Y., Sunatsuki, Y., Ogawa, Y., Matsumoto, N., & Re, N. (2003). Nature 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). Inorganic Chemistry, 42(2), 398-408.
Kido T, et al. Nature 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. 2003 Jan 27;42(2):398-408. PubMed PMID: 12693220.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Nature 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). AU - Kido,Takafumi, AU - Ikuta,Yuichi, AU - Sunatsuki,Yukinari, AU - Ogawa,Yoshihiro, AU - Matsumoto,Naohide, AU - Re,Nazzareno, PY - 2003/4/16/pubmed PY - 2003/4/16/medline PY - 2003/4/16/entrez SP - 398 EP - 408 JF - Inorganic chemistry JO - Inorg Chem VL - 42 IS - 2 N2 - 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. The crystal structures of 4 and 5 showed that each complex has a cyclic cylindrical tetranuclear CuII2LnIII2 structure, in which the CuII complex functions as a "bridging ligand-complex" to two adjacent LnIII ions. The temperature-dependent magnetic susceptibilities from 2 to 300 K and the field-dependent magnetizations at 2 K from 0 to 5 T have been measured for four pairs of CuII2LnIII2 and NiII2LnIII2, in which compound NiII2LnIII2 containing diamagnetic NiII ion was used as the reference complex to evaluate the CuII-LnIII magnetic interaction. Comparison of the magnetic properties of the CuII2LnIII2 complex with those of the corresponding NiII2LnIII2 complex showed that the magnetic interaction between CuII and EuIII ions is weakly ferromagnetic and that between CuII and either of GdIII, TbIII, and DyIII ions is ferromagnetic. Complex CuII2GdIII2, 4, has an S = 8 spin ground state, due to the ferromagnetic spin coupling between SGd = 7/2 and SCu = 1/2 with coupling constants of J1 = +3.1 cm-1 and J2 = +1.2 cm-1. The magnetic measurements showed that compounds 5 and 6, CuII2LnIII2 (LnIII = Tb, Dy), exhibit large magnetic moments and large magnetic anisotropy due to the LnIII ion. SN - 0020-1669 UR - https://www.unboundmedicine.com/medline/citation/12693220/Nature_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__ L2 - https://dx.doi.org/10.1021/ic026045d DB - PRIME DP - Unbound Medicine ER -
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