A carotenoid‐fullerene dyad has been synthesized by condensing a carotenoid amine with an acid group attached to C60 by a cyclopropane‐based linkage. The lowest excited singlet state of the fullerene is strongly quenched by electron transfer from the carotenoid moiety to generate the charge‐separated species Car+‐C60.‐. In CS2 solution Car+‐C60.‐ has a rise time of 0.8 ps and decays by charge recombination in 534 ps. Light absorbed by either chromophore produces a high yield of Car+‐C60.‐, which implies that internal conversion in the carotenoid is negligible. The lowest triplet level in the dyad is localized on the carotenoid and is populated in low yield from the charge‐separated species. The sensitization of singlet oxygen by the fullerene component is effectively curtailed in the dyad.
|Original language||English (US)|
|Number of pages||6|
|Journal||Photochemistry and photobiology|
|State||Published - Dec 1995|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry