Characterization of hemicyanine Langmuir-Blodgett films by picosecond time-resolved fluorescence
Langue
en
Article de revue
Ce document a été publié dans
Journal of Photochemistry and Photobiology B: Biology. 2008-10-16, vol. 93, n° 1, p. 44-52
Elsevier
Résumé en anglais
Hemicyanine Langmuir–Blodgett films have been elaborated and characterized using stationary and time-resolved spectroscopic techniques. Depending on the experimental conditions, especially the pH of the water subphase, the ...Lire la suite >
Hemicyanine Langmuir–Blodgett films have been elaborated and characterized using stationary and time-resolved spectroscopic techniques. Depending on the experimental conditions, especially the pH of the water subphase, the absorption spectra of the films indicate the presence of non-fluorescent Haggregates in the monolayer. Time-resolved fluorescence measurements revealed three mono-exponential decay times: a very short one (20–23 ps) attributed to an excited intramolecular charge transfer state and two longer ones (100–120 ps and 400–590 ps) attributed to thephotoisomerization of the chromophores.< Réduire
Mots clés en anglais
Langmuir–Blodgett film
Hemicyanine
Fluorescence
Charge transfer
Photoisomerization
Origine
Importé de halUnités de recherche