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

Flavia Artizzu, Kevin Bernot, Andrea Caneschi, Eugenio Coronado, Juan M. Clemente-Juan, Luciano Marchiò, Maria Laura Mercuri, Luca Pilia, Angela Serpe, Paola Deplano

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

The synthesis and structural characterization of the neutral gadolinium tetrakis-type complex with 5,7-dichloro-8-quinolinolato (H5,7ClQ) ligands, [Gd(5,7ClQ)2(H5,7ClQ)2Cl], 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 π-π stacking interactions between the (H5,7ClQ) ligands give rise to a ferromagnetic interaction between the gadolinium centres. The GdIII derivatives provide magnetic evidence for the presence of stacking interactions, which are usually undetectable in optically active ErIII derivatives.

Lingua originaleInglese
pagine (da-a)3820-3826
Numero di pagine7
RivistaEuropean Journal of Inorganic Chemistry
Numero di pubblicazione24
DOI
Stato di pubblicazionePubblicato - ago 2008
Pubblicato esternamente

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