Emission of cyanine dye embedded in nanopores of anodic alumina matrix

The absorption and fluorescence properties of the cyanine dye embedded in nanoporous anodic alumina matrix were studied. The intramolecular rotational motion is hindered for adsorbed molecules in the nanopores and causes the increase of fluorescence decay time. Stimulated emission of sample was obtained in the long-wavelength band of the fluorescence spectrum.