Premium
Photoinduced Charge Separation in a Donor–Spacer–Acceptor Dyad with N ‐Annulated Perylene Donor and Methylviologen Acceptor
Author(s) -
Santoni MariePierre,
Santoro Antonio,
Salerno Tania M. G.,
Puntoriero Fausto,
Nastasi Francesco,
Di Pietro M. Letizia,
Galletta Maurilio,
Campagna Sebastiano
Publication year - 2015
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201500615
Subject(s) - perylene , photochemistry , photoinduced charge separation , chemistry , acceptor , photoinduced electron transfer , electron donor , ultrafast laser spectroscopy , excited state , electron acceptor , electron transfer , absorption spectroscopy , spectroscopy , artificial photosynthesis , molecule , photocatalysis , organic chemistry , catalysis , physics , quantum mechanics , nuclear physics , condensed matter physics
The first donor–acceptor species in which a strongly emissive N ‐annulated perylene dye is connected to a methylviologen electron acceptor unit via its macrocyclic nitrogen atom, is prepared by a stepwise, modular procedure. The absorption spectra, redox behavior, spectroelectrochemistry and photophysical properties of this dyad and of its model species are investigated, also by pump–probe fs transient absorption spectroscopy. Photoinduced oxidative electron transfer from the excited state of the dyad, centered on the N ‐annulated perylene subunit, to the appended methyviologen electron acceptor takes place in a few ps. The charge‐separated species recombines in 19 ps. Our results indicate that N ‐annulated perylene can be connected to functional units by taking advantage of the macrocyclic nitrogen, an option never used until now, without losing their properties, so opening the way to new designing approaches.