Temperature response of luminescent tris(bipyridine)ruthenium(II)-doped silica nanoparticles
- Mirenda, Martin
- Levi, Valeria
- Bossi, Mariano Luis
- Bruno, Luciana
- Bordoni, Andrea Veronica
- Regazzoni, Alberto Ernesto
- Wolosiuk, Alejandro
DOIAbstract
Nanoparticle-based temperature imaging is an emerging field of advanced applications. Herein, the sensitivity of the phosphorescence of tris(bipyridine)ruthenium(II)-doped silica nanoparticles towards temperature is studied. 130 nm size particles were prepared by a modification of Stöber’s method, that allows the incorporation of Ru[(bpy)3]2+ into the outer particle shell. The entrapped Ru[(bpy)3]2+ retains its photophysical properties, yet the emission of the particles is not affected by the presence of O2, neither by anionic quenchers; quenching by MV2+, on the other hand, is strongly dependent on pH. Between 20 and 60 °C, the steady-state emission of the particles decreases linearly with increasing temperature. The slope of the straight ...
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