5.2.4 Emissive Exciplexes of Surface-Immobilized Dybenzoylmethanatoboron Difluoride with Gaseous Benzene, Toluene and Xylenes

Mikhail Alfimov, Viacheslav Sazhinikov & Aziz Muzafarov
Core-shell silica nanoparticles consisting of a SiO2 core and a shell with covalently attached alkoxysilyl derivative of dibenzoylmethanatoboron difluoride (DBMBF2) were synthesized. It was found that the nanoparticles may be used as the basis of selective sensor materials suitable for detecting benzene, toluene and xylene vapors. The DBMBF2 fluorescence quenching followed by the appearance of the DBMBF2/analyte exciplex fluorescence is observed upon adsorption of benzene or its methyl derivatives on the nanoparticle surface. The position...