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Porphyrin Antennas on Carbon Nanodots: Excited State Energy and Electron Transduction
Author(s) -
Arcudi Francesca,
Strauss Volker,
Đorđević Luka,
Cadranel Alejandro,
Guldi Dirk M.,
Prato Maurizio
Publication year - 2017
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201704544
Subject(s) - excited state , porphyrin , photochemistry , materials science , excitation , ultraviolet , singlet state , electron acceptor , ultraviolet light , electron , nanodot , acceptor , atomic physics , optoelectronics , chemistry , physics , condensed matter physics , quantum mechanics
We report the synthesis and electron donor–acceptor features of a novel nanohybrid, in which the light‐harvesting and electron‐donating properties of a meso ‐tetraarylporphyrin (TArP) are combined with the electron‐accepting features of nitrogen‐doped carbon nanodots (NCNDs). In particular, in an ultrafast process (>10 12 s −1 ), visible‐light excitation transforms the strongly quenched porphyrin singlet excited states into short‐lived (225 ps) charge‐separated states. On the other hand, ultraviolet light excitation triggers a non‐resolvable transduction of singlet excited state energy from the NCNDs to the porphyrins, followed by the same charge separation observed upon visible light excitation.