Fullerene acting as an electron donor in a donor–acceptor dyad to attain the long-lived charge-separated state by complexation with scandium ion

Abstract

A long-lived charge-separated (CS) state of fullerene-trinitrofluorenone linked dyad in which fullerene acts as an electron donor is formed by photoinduced electron transfer from C60 to TNF in the presence of Sc(OTf)3; the CS lifetime is determined as 23 ms in PhCN at 298 K.

Taming C60fullerene: tuning intramolecular photoinduced electron transfer process with subphthalocyanines

“…In a fullerene–trinitrofluorenone conjugate, photoexcitation and the presence of Sc(OTf) 3 leads, indeed, to the formation of oxidized fullerenes, whereas only the triplet excited state of the fullerene was observed in the absence of Sc(OTf) 3 . 13 No successful intramolecular oxidation of fullerenes by means of simple photoexcitation has ever been reported.…”

Organic photochemistry

“…Fullerene and porphyrin are the most popular compounds used in designed chromophore sequences. 20 Prolonged charge-separated states result from starburst tetra(diphenylaminofluoreno) [60]fullerene adducts upon photoexcitation, 21 photoinduced electron transfer in an oligo(thienylenevinylene):fullerene composite is observed, 22 a fullerene acting as an electron donor in a donor-acceptor dyad to attain the long-lived charge-separated state by complexation with scandium ion was reported, 23 and energy transfer in oligofluorene-C 60 and C 60 -oligofluorene-C 60 donor-acceptor conjugates has been observed. 24 One of the purposes for studying photoprocesses in a designed chromophore is to fabricate new efficient solar cells.…”

Taming C60 Fullerene: Tuning Intramolecular Photoinduced Electron Transfer Process with Subphthalocyanines

“…In a fullerene-trinitro-uorenone conjugate, photoexcitation and the presence of Sc(OTf) 3 leads, indeed, to the formation of oxidized fullerenes, whereas only the triplet excited state of the fullerene was observed in the absence of Sc(OTf) 3 . 13 No successful intramolecular oxidation of fullerenes by means of simple photoexcitation has ever been reported.…”