Data di Pubblicazione:
2016
Citazione:
Luminescent chiral ionic Ir(III) complexes : synthesis and photophysical properties / L. Ricciardi, M. La Deda, A. Ionescu, N. Godberg, I. Aiello, M. Ghedini, M. Fusè, I. Rimoldi, E. Cesarotti. - In: JOURNAL OF LUMINESCENCE. - ISSN 0022-2313. - 170:part 3(2016 Feb), pp. 812-819. [10.1016/j.jlumin.2015.08.003]
Abstract:
Three homologous series of luminescent octahedral ionic Ir(III) complexes (1-12) with a dual stereogenic center of general formula (Delta,Lambda) ((R,S))[(ppy)(2)Ir(R-campy)]X, where ppy=2-phenylpyridine, R-campy=2-methyl-5,6,7,8-tetrahydroquinolin-8-amine (Me-campy) or 8-amino-5,6,7,8-tetrahydroquinolines (H-campy) and as counterions X-=Cl- or CH3COO- have been synthesized and characterized. The NMR characterization of each complex highlighted the diastereoisomeric purity and the absolute configuration has been confirmed by Electronic Circular Dichroism spectroscopy. The absorption and the luminescence properties of the compounds in solution and in solid state have been investigated by UV-vis, steady-state emission and time-correlated single-photon counting spectroscopy. The obtained results from the 12 compounds highlight the difficult to correlate photophysical properties in solution to the stereochemistry, while excited states decay studies of the solid state samples indicate a correlation between photophysics and packing mode which is affected by the different stereochemistry.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
chiral complex; ionic Ir(III) complexes; dual stereogenic center; photoluminescence
Elenco autori:
L. Ricciardi, M. La Deda, A. Ionescu, N. Godberg, I. Aiello, M. Ghedini, M. Fusè, I. Rimoldi, E. Cesarotti
Link alla scheda completa: