S/Se-Terchalcogenophene-C Dyads: Synthesis and Characterization of Optical and Photosensitizing Properties.

Fullerenes have been long investigated for application as singlet oxygen sources. Even though they possess high photosensitizing efficiency, their practical use is still limited, mostly because of insufficient absorption of visible and/or near-infrared light. This limitation can be overcome by introducing organic chromophores that absorb longer-wavelength light, either by covalent attachment to C or by its encapsulation in a polymeric matrix.