V(IV)O and Cu(II) complexation by ligands based on pyridine nitrogen donors (Articolo in rivista)

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  • V(IV)O and Cu(II) complexation by ligands based on pyridine nitrogen donors (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1039/C2DT31109G (literal)
Alternative label
  • D. Sanna; P. Buglyó; A. I. Tomaz; J. Costa Pessoa; S. Borovic; G. Micera; E. Garribba (2012)
    V(IV)O and Cu(II) complexation by ligands based on pyridine nitrogen donors
    in Dalton transactions (2003. Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D. Sanna; P. Buglyó; A. I. Tomaz; J. Costa Pessoa; S. Borovic; G. Micera; E. Garribba (literal)
Pagina inizio
  • 12824 (literal)
Pagina fine
  • 12838 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pubs.rsc.org/en/Content/ArticleLanding/2012/DT/c2dt31109g (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 41 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, I-07040 Sassari, Italy Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, Hungary Centro de Ciências Moleculares e Materiais, Departamento de Química e Bioquímica, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal Dipartimento di Chimica e Farmacia, and Centro Interdisciplinare per lo Sviluppo della Ricerca Biotecnologica e per lo Studio della Biodiversità della Sardegna, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy (literal)
Titolo
  • V(IV)O and Cu(II) complexation by ligands based on pyridine nitrogen donors (literal)
Abstract
  • The binary and ternary systems formed by VIVO and CuII ions with ligands (L) based on the pyridine ring (1,10-phenanthroline (phen), 2,2?-bipyridine (bpy), 2,2?:6?,2??-terpyridine (terpy), 2,2?-bipyrimidine (bpm) and 2,3-bis(2-pyridyl)pyrazine (bpp)) were studied, combining spectroscopic (EPR and UV-vis), pH-potentiometric and computational (DFT calculations) methods. In the systems with VIVO, the formation of mono-chelated complexes with equatorial-equatorial and equatorial-axial (phen, bpy, bpm and bpp) or equatorial-equatorial-equatorial and equatorial-axial-equatorial coordination (terpy) and bis-chelated species with cis-octahedral geometry, with a water or a hydroxido ion in the fourth equatorial position, is demonstrated. Phen, bpy, bpm and bpp form also a dinuclear [(VO)2L2(H2O)2(OH)2]2+ complex with an anti-coplanar arrangement of the two VIVO ions and a ferromagnetic coupling between the metal ions. Due to the low basicity of the nitrogen donors, the potentially tetradentate 2,2?-bipyrimidine and 2,3-bis(2-pyridyl)pyrazine behave like simple bidentate ligands, and in the ternary systems with 2,2?-bipyridine the expected dinuclear species, in which the former ligands would act as a bridge between the two metal ions using all four nitrogen donors, are not formed. The interaction of phen and CuII-phen complexes with human serum albumin (HSA) was also studied at pH 7.4 by circular dichroism and EPR spectroscopy, the formation of several HSA-CuII-phen containing species being confirmed and their binding constants determined. (literal)
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