Spectral and kinetic features of rhodamine 6G fluorescence quenching in a heterogeneous system of macroporous silica (silokhrom, S-80) and water caused by the combined influence of an external heavy atom (KI) and resonance-excited surface plasmons on citrate hydrosol silver nanoparticles. Surface plasmon quenching occurred through donor–acceptor interaction in complexes with iodide and silver nanoparticles. The activation energy of dye fluorescence quenching in the heterogeneous system had a minimum that was associated with hindered diffusion during the formation of silver-nanoparticle clusters.
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Tikhomirova, N.S., Samusev, I.G., Slezhkin, V.A. et al. Rhodamine 6G Fluorescence Quenching by an External Heavy Atom and Silver Nanoparticles at the Nanoporous-Silica–Water Boundary. J Appl Spectrosc 84, 376–381 (2017). https://doi.org/10.1007/s10812-017-0479-2
- silver nanoparticles
- rhodamine 6G
- surface plasmon
- external heavy atom
- citrate hydrosol
- quenching activation energy