Funct. Mater. 2015; 22 (2): 207-211.
Fluorescence of cyanine dye excimers
in nanoporous silica
Institute for Scintillation Materials, STC "Institute for Single Crystals", National Academy of Sciences of Ukraine, 60 Lenin Ave., 61001 Kharkiv, Ukraine
Adsorption of cyanine dye DiI in a nanopous SiO2 matrix has been studied. It was shown that the increase of the dye concentration in the SiO2 matrix provokes the appearance of an additional red-shifted band of excimer nature in the dye fluorescence spectrum without any changes in the absorption one. Static character of the dye excimer formation was revealed. Enhanced dye concentration due to spatial confinement in a nanopore volume has been supposed as a reason of the effective excimer formation.
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