The synthesis and structural characterization of the neutral gadolinium tetrakis-type complex with 5,7-dichloro-8-quinolinolato (H5,7C1Q) ligands [Gd(5,7C1Q)(2)(H5,7C1Q)(2)C1] is reported. The Gd-III ion is epta coordinated to one chloride ion and to four ligands: two N,O-chelated monoanions and two as zwitterionic (+NH and O-) monodentate oxygen donors. Electronic and vibrational spectra provide suitable markers to distinguish the presence of deprotonated and protonated ligands. The magnetic behaviour of this compound was investigated and explained by taking into account that pi-pi stacking interactions between the (H5,7C1Q) ligands give rise to a ferromagnetic interaction between the gadolinium centres. The Gd-III derivatives provide magnetic evidence for the presence of stacking interactions which are usually undetectable in optically active Er-III derivatives.

Synthesis, structure, spectroscopic studies and magnetic properties of the tetrakis(5,7-dichloro-8-quinolinolato)gadolinium(III) complex / F. Artizzu; K. Bernot; A. Caneschi; E. Coronado; J. M. Clemente-Juan; L. Marchio; M. L. Mercuri; L. Pilia; A. Serpe; P. Deplano. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - STAMPA. - 24:(2008), pp. 3820-3826. [10.1002/ejic.200800388]

Synthesis, structure, spectroscopic studies and magnetic properties of the tetrakis(5,7-dichloro-8-quinolinolato)gadolinium(III) complex

CANESCHI, ANDREA;
2008

Abstract

The synthesis and structural characterization of the neutral gadolinium tetrakis-type complex with 5,7-dichloro-8-quinolinolato (H5,7C1Q) ligands [Gd(5,7C1Q)(2)(H5,7C1Q)(2)C1] is reported. The Gd-III ion is epta coordinated to one chloride ion and to four ligands: two N,O-chelated monoanions and two as zwitterionic (+NH and O-) monodentate oxygen donors. Electronic and vibrational spectra provide suitable markers to distinguish the presence of deprotonated and protonated ligands. The magnetic behaviour of this compound was investigated and explained by taking into account that pi-pi stacking interactions between the (H5,7C1Q) ligands give rise to a ferromagnetic interaction between the gadolinium centres. The Gd-III derivatives provide magnetic evidence for the presence of stacking interactions which are usually undetectable in optically active Er-III derivatives.
2008
24
3820
3826
F. Artizzu; K. Bernot; A. Caneschi; E. Coronado; J. M. Clemente-Juan; L. Marchio; M. L. Mercuri; L. Pilia; A. Serpe; P. Deplano
File in questo prodotto:
File Dimensione Formato  
EurJIC_2008.pdf

Accesso chiuso

Descrizione: EurJIC_2008
Tipologia: Pdf editoriale (Version of record)
Licenza: Tutti i diritti riservati
Dimensione 575.97 kB
Formato Adobe PDF
575.97 kB Adobe PDF   Richiedi una copia

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/330908
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 20
  • ???jsp.display-item.citation.isi??? 21
social impact