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One β and Two-Step Resonance Energy Transfer Between Cyanine Dyes in Layered Silicates Colloidal Systems
Resonance energy transfer (RET) is of high interest for both the basic research and practical
applications. It is a phenomenon of radiationless transmission of energy between donor and acceptor
molecules. In this study single- and two-step (RET) was investigated between cyanine dye cations (NK1,
NK2, NK3) in colloids of layered silicate, synthetic Sumecton saponite. In these systems the dye molecules
played role of the energy donors (NK1) or energy acceptors (NK2, NK3) or both (NK2). The adsorption and
formation of various types of dye species was studied using visible spectroscopy. The absorption
spectroscopy did not detect any significant molecular aggregation of the dyes at the surface of saponite
particles. The RET process was described by fluorescence spectroscopy. Both the single- and two-step RET
were detected in saponite dispersion. Effects of various parameters on the efficiency of the RET process,
such as dye concentrations, saponite properties the distances between co-adsorbed dye cations were found
to be essential.
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3530
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