Exclusive triplet electron transfer leading to long-lived radical ion-pair formation in an electron rich platinum porphyrin covalently linked to fullerene dyad

The formation of a high-energy, long-lived radical ion-pair by electron transfer exclusively from the triplet excited state, is demonstrated in a newly synthesized platinum porphyrin-fullerene dyad, in which the porphyrin ring is modified with three electron rich triphenylamine entities. The spin se...

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Published inChemical communications (Cambridge, England) Vol. 56; no. 45; pp. 658 - 661
Main Authors Subedi, Dili R, Gobeze, Habtom B, Kandrashkin, Yuri E, Poddutoori, Prashanth K, van der Est, Art, D'Souza, Francis
Format Journal Article
LanguageEnglish
Published CAMBRIDGE Royal Soc Chemistry 07.06.2020
Royal Society of Chemistry
Subjects
Chemistry
Chemistry, Multidisciplinary
Electron spin
Electron transfer
Electrons
Fullerenes
Ion pairs
Physical Sciences
Platinum
Science & Technology
Selectivity
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Summary:The formation of a high-energy, long-lived radical ion-pair by electron transfer exclusively from the triplet excited state, is demonstrated in a newly synthesized platinum porphyrin-fullerene dyad, in which the porphyrin ring is modified with three electron rich triphenylamine entities. The spin selectivity of the electron transfer leading to the formation of the radical ion-pair is demonstrated using time-resolved optical and EPR spectroscopic techniques. Radical ion-pair energy as high as 1.48 eV with lifetime as much as ∼1 μs, exclusively from the triplet excited state of a photosensitizer, is established in a novel donor-acceptor conjugate.
Bibliography:10.1039/d0cc02007a
Electronic supplementary information (ESI) available: Synthesis and Experimental details, additional fs-TA and ns-TA spectral data. See DOI
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc02007a