Characterization of hemicyanine Langmuir-Blodgett films by picosecond time-resolved fluorescence

Journal of Photochemistry and Photobiology. B, Biology
Emmanuel AbrahamGediminas Jonusauskas

Abstract

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 H-aggregates 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 the photoisomerization of the chromophores.

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Citations

Dec 15, 2015·Langmuir : the ACS Journal of Surfaces and Colloids·S L SelektorSergei N Chvalun
Dec 23, 2015·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·B JędrzejewskaR Zaleśny
Mar 17, 2011·Physical Chemistry Chemical Physics : PCCP·Dorota PrukałaMarek Sikorski
Dec 24, 2009·The Journal of Physical Chemistry. B·K RajeshT P Radhakrishnan
Nov 26, 2013·The Journal of Physical Chemistry. a·Youmin Lee, Minyung Lee

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