We have prepared a molecular triad containing a triphenylamine as the electron donor D subunit, an anthraquinone derivative as the acceptor A group, and a dinuclear Ru(II) species (P-P) based on terpyridine-like ligands as light-harvesting subunit, so that a linearly arranged D-(P-P)-A molecular triad is obtained. In acetonitrile solution containing 1% (in volume) of methanol, photoinduced oxidative electron transfer occurs in 380 ps, with formation of the D-(P-P)(+)-A charge-separated (CS) state. However, although formation of the fully-developed D+-(P-P)-A state is favored by about 0.23 eV, such species is not formed since charge recombination within D-(P-P)(+)-A appears to be faster. (C) 2017 Elsevier B. V. All rights reserved.

Solvent-control of photoinduced electron transfer via hydrogen bonding in a molecular triad made of a dinuclear chromophore subunit

ARRIGO, ANTONINO
Primo
;
NASTASI, FRANCESCO;LA GANGA, GIUSEPPINA;PUNTORIERO, Fausto
;
LICCIARDELLO, Antonino Andrea;CAMPAGNA, Sebastiano
2017-01-01

Abstract

We have prepared a molecular triad containing a triphenylamine as the electron donor D subunit, an anthraquinone derivative as the acceptor A group, and a dinuclear Ru(II) species (P-P) based on terpyridine-like ligands as light-harvesting subunit, so that a linearly arranged D-(P-P)-A molecular triad is obtained. In acetonitrile solution containing 1% (in volume) of methanol, photoinduced oxidative electron transfer occurs in 380 ps, with formation of the D-(P-P)(+)-A charge-separated (CS) state. However, although formation of the fully-developed D+-(P-P)-A state is favored by about 0.23 eV, such species is not formed since charge recombination within D-(P-P)(+)-A appears to be faster. (C) 2017 Elsevier B. V. All rights reserved.
2017
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3107825
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