Temperature response of luminescent tris(bipyridine)ruthenium(II)-doped silica nanoparticles

► Colloidal tris(bipyridine)ruthenium(II)-doped silica nanoparticles are luminescent. ► Their emission decreases linearly with increasing temperature. ► Their phosphorescence is not affected by oxygen, nor negatively charged quenchers. ► They are suitable for sensing temperature in micro-environments.