791619-72-2Relevant academic research and scientific papers
Zinc porphyrin with phenoxy-bridged pentacoordinate bis(8- hydroxyquinaldinate)gallium lateral pendants: Synthesis and photophysical characterization
La Deda, Massimo,Ghedini, Mauro,Aiello, Iolinda,Franco, Irene De
, p. 1273 - 1276 (2004)
New polymetallic species formed by a zinc-tetraphenol porphyrinate core and peripheral gallium-quinaldinate fragments were synthesized and characterized. These polynuclear complexes are luminescent and photophysical analysis showed that the emitted colour can be tuned through selection of the excitation energy. This communication reports the synthesis of polymetallic species formed by a zinc-tetraphenolporphyrinate core (ZnTPP(OH)4, 1) and peripheral gallium-quinaldinate (Q2′Ga) fragments. The photophysical analysis of 1 and of the model compound Q2′GaOPh, R, shows an appreciable overlap between the absorption spectra of 1 and the emission spectra of R, suggesting the presence of a donor-acceptor energy-transfer process. Contrarily, the obtained results indicated that energy transfer does not occur, hence these polymetallic complexes work as double emitting species, for which the colour of luminescence depends on the excitation energy.
