Electrochemistry of Dinuclear Re(I) Complexes with Bridging 1,2 Heteroaromatic Chromophore Ligands
Altro
Data di Pubblicazione:
2010
Citazione:
Electrochemistry of Dinuclear Re(I) Complexes
with Bridging 1,2 Heteroaromatic Chromophore Ligands / G. D’Alfonso, M. Panigati, P. Mercandelli, D. Donghi, E. Quartapelle Procopio, M. Mauro, A. Raimondi, P.R. Mussini. ((Intervento presentato al 43. convegno Heyrovský Discussion Electrochemistry of Organic Molecules and Coordination Compounds, 30. May – 3. June 2010. tenutosi a Trest (Czech Republic) nel 2010.
Abstract:
In the last years we have been developing [1-3] a new class of
photoluminescent complexes with high quantum yields, having a
dinuclear Re2-X)2(CO)6 scaffold with: (a) a bridging 1,2
heteroaromatic ligand, either a pyridazine (with many combinations
of electron donating or electron attractor substituents
R, R'; R'', R''' on the aromatic ring) or an oxadiazole; (b) two
ancillary bridging ligands X and X' (either halides Cl, Br, or I;
and/or H; or OH, OCH3, OC6H5, OC6F5, SC6H5).
The nature of the ligands greatly influences (a) the electrochemical properties of the
molecule, in terms of energies of the HOMO (localized on the dinuclear Re2-X)2
(CO)6 core) and LUMO (localized on the heteroaromatic ring), and (b) the
electrochemical and chemical reversibility of the electron transfers. These features will
be discussed in detail also in comparison with the electrochemical reactivity of the free
heteroaromatic ligands, and with the functional properties of these molecules. The
electrochemical study, combined with other techniques, is important for interpretation
and prediction purposes, in order to develop electroluminescent devices based on these
new classes of Re(I) complexes. Nevertheless, it also looks attracting (in some cases
intriguing) in itself, since the wide, systematic compound family now available provides
an unusually complete and neat model case of multivariate electrochemical reactivity in
a complex system.
References
[1] D. Donghi; G. D'Alfonso, M. Mauro, M. Panigati; P. Mercandelli, A. Sironi, P. Mussini, L.
D'Alfonso. Inorganic Chemistry 47 (2008) 4243.
[2] M. Mauro, M. Panigati, D. Donghi, P. Mercandelli, P. Mussini, A. Sironi, G. D'Alfonso. Inorg.
Chem. 47 (2008) 11154.
[3] M. Mauro; E. Quartapelle Procopio; Y. Sun; C.-H. Chien; D. Donghi; M. Panigati, Monica; P.
Mercandelli; P.Mussini; G. D'Alfonso; L. De Cola, Adv. Funct. Mat. 19 (2009) 2607.
Tipologia IRIS:
14 - Intervento a convegno non pubblicato
Elenco autori:
G. D’Alfonso, M. Panigati, P. Mercandelli, D. Donghi, E. Quartapelle Procopio, M. Mauro, A. Raimondi, P.R. Mussini
Link alla scheda completa: