J. Phys. IV France 125 (2005) 43-46
Photo-induced charge transfer in molecular materials based on Prussian blue analogs: A photoacoustic studyS. Stolik1, E. Reguera2, S.A. Tomás3 and F. Sánchez-Sinencio3
1 CEADEN, Calle 30, No. 502, Playa, CP 11300, Ciudad de La Habana, Cuba
2 IMRE, Universidad de La Habana, San Lázaro y L, Vedado, Ciudad de La Habana, Cuba
3 Departamento de Física, CINVESTAV-IPN, A.P. 14-740, Mexico 07360 DF, Mexico
Photoacoustic spectra of molecular materials based on the assembling of the [Fe(CN)6] molecular block were recorded and evaluated. An intense absorption band around 600 nm was observed for compounds where the valence of the involved metals allows charge transfer through the CN ligand (inner photo-induced redox reactions). In the absence of this transition, only the signal corresponding to d-d transitions within the metal was observed, which falls below 450 nm. This suggests that photoacoustic spectroscopy provides a fast and reliable method to explore the existence of tunable photo-induced charge transfer in molecular materials.
© EDP Sciences 2005