Hetero di- and trinuclear Cu-Gd complexes with trifluoroacetate bridges: synthesis, structural and magnetic studies

Dalton Transactions : an International Journal of Inorganic Chemistry
Ghenadie NovitchiNicolae Stanica

Abstract

The synthesis, structural determinations and magnetic properties of an original dinuclear Cu-Gd and two trinuclear Cu-Ln-Cu complexes (Ln = Gd or Dy) made with a Schiff base ligand and carboxylate ligands are reported. In each complex, the copper and gadolinium or dysprosium ions are linked by a double phenoxo bridge and a eta1:eta1:mu trifluoroacetato bridge. The dinuclear Cu-Gd complex exhibits the usual ferromagnetic interaction while the trinuclear (Cu-Gd-Cu) complexes can not be fitted with a simple Hamiltonian that only takes into account the Cu-Gd interaction. Introduction into the Hamiltonian of a Cu-Cu interaction between the terminal copper ions gives a nice fit in the case of a ferromagnetic Cu-Cu interaction (J'(Cu-Cu) = 8.3 and 9.8 cm(-1)). For the first time, the occurrence of a ferromagnetic interaction between the copper ions of the trinuclear entities is evidenced and supported by the field dependence of the magnetization. As there is no direct proof for the existence of an interaction between two centers through a third magnetic center located in between them, we can conclude that the existence of pi-pi stacking interactions through the phenyl rings of the ligands are responsible for the presence of these inte...Continue Reading

References

Jan 1, 1995·Acta Crystallographica. Section A, Foundations of Crystallography·R H Blessing
May 1, 1993·Molecular Microbiology·D Kahn
Feb 22, 2002·Chemistry : a European Journal·Thierry Le BorgneMichel Ephritikhine
Jun 13, 2002·Chemical Reviews·Cristiano Benelli, Dante Gatteschi
Aug 13, 2002·Chemical Communications : Chem Comm·Augustin M MadalanNicolae Stanica
Dec 20, 2002·Angewandte Chemie·Thomas Steiner

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Citations

May 27, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·He-Rui WenYun-Zhi Tang
Nov 2, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Bin Wu
Jan 18, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Dmytro S NesterovAndrew Ozarowski
Nov 28, 2013·Chemical Communications : Chem Comm·Shigeki Matsunaga, Masakatsu Shibasaki
Mar 7, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Cristiano BenelliPatrizia Rossi
Apr 14, 2009·Inorganic Chemistry·Marius AndruhSong Gao
May 30, 2012·Journal of the American Chemical Society·Eduard CremadesEliseo Ruiz

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