Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Tuning the reorganization energy of electron transfer in supramolecular ensembles - Metalloporphyrin, oligophenylenevinylenes, and fullerene - And the impact on electron transfer kinetics
Δημιουργός/Συγγραφέας:	Stangel C. Schubert C. Kuhri S. Rotas G. Margraf J.T. Regulska E. Clark T. Torres T. [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos Coutsolelos A.G. Guldi D.M.
Εκδότης:	Royal Society of Chemistry
Ημερομηνία:	2015
Γλώσσα:	Αγγλικά
ISSN:	2040-3364
DOI:	10.1039/c4nr05165c
Περίληψη:	Oligo(p-phenylenevinylene) (oPPV) wires of various lengths featuring pyridyls at one terminal and C60 moieties at the other, have been used as molecular building blocks in combination with porphyrins to construct a novel class of electron donor-acceptor architectures. These architectures, which are based on non-covalent, directional interactions between the zinc centers of the porphyrins and the pyridyls, have been characterized by nuclear magnetic resonance spectroscopy and mass spectrometry. Complementary physico-chemical assays focused on the interactions between electron donors and acceptors in the ground and excited states. No appreciable electron interactions were noted in the ground state, which was being probed by electrochemistry, absorption spectroscopy, etc.; the electron acceptors are sufficiently decoupled from the electron donors. In the excited state, a different picture evolved. In particular, steady-state and time-resolved fluorescence and transient absorption measurements revealed substantial electron donor-acceptor interactions. These led, upon photoexcitation of the porphyrins, to tunable intramolecular electron-transfer processes, that is, the oxidation of porphyrin and the reduction of C60. In this regard, the largest impact stems from a rather strong distance dependence of the total reorganization energy in stark contrast to the distance independence seen for covalently linked conjugates.
Τίτλος πηγής δημοσίευσης:	Nanoscale
Τόμος/Κεφάλαιο:	7
Τεύχος:	6
Σελίδες:	2597-2608
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© The Royal Society of Chemistry 2015.
Όροι και προϋποθέσεις δικαιωμάτων:	All Open Access, Green
Σημειώσεις:	FP7-REGPOT-2008-1; PIB2010US-00652
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο