TY - JOUR
T1 - Synthesis, structure, spectroscopic studies and magnetic properties of the tetrakis(5,7-dichloro-8-quinolinolato)gadolinium(III) complex
AU - Artizzu, Flavia
AU - Bernot, Kevin
AU - Caneschi, Andrea
AU - Coronado, Eugenio
AU - Clemente-Juan, Juan M.
AU - Marchiò, Luciano
AU - Mercuri, Maria Laura
AU - Pilia, Luca
AU - Serpe, Angela
AU - Deplano, Paola
PY - 2008/8
Y1 - 2008/8
N2 - 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.
AB - 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.
KW - Gadolinium
KW - Magnetic properties
KW - N,O ligands
KW - Spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=53249133125&partnerID=8YFLogxK
U2 - 10.1002/ejic.200800388
DO - 10.1002/ejic.200800388
M3 - Article
SN - 1434-1948
SP - 3820
EP - 3826
JO - European Journal of Inorganic Chemistry
JF - European Journal of Inorganic Chemistry
IS - 24
ER -