Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Combining Zinc Phthalocyanines, Oligo(p-Phenylenevinylenes), and Fullerenes to Impact Reorganization Energies and Attenuation Factors
Δημιουργός/Συγγραφέας:	Krug M. Stangel C. Zieleniewska A. Clark T. Torres T. Coutsolelos A.G. Guldi D.M.
Εκδότης:	Wiley-VCH Verlag
Ημερομηνία:	2019
Γλώσσα:	Αγγλικά
ISSN:	1439-4235
DOI:	10.1002/cphc.201900780
Άλλο:	PubMed ID: 31471925
Περίληψη:	A study on electron transfer in three electron donor-acceptor complexes is reported. These architectures consist of a zinc phthalocyanine (ZnPc) as the excited-state electron donor and a fullerene (C60) as the ground-state electron acceptor. These complexes are brought together by axial coordination at ZnPc. The key variable in our design is the length of the molecular spacer, namely, oligo-p-phenylenevinylenes. The lack of appreciable ground-state interactions is in accordance with strong excited-state interactions, as inferred from the quenching of ZnPc centered fluorescence and the presence of a short-lived fluorescence component. Full-fledged femtosecond and nanosecond transient absorption spectroscopy assays corroborated that the ZnPc ⋅ +-C60 ⋅ − charge-separated state formation comes at the expense of excited-state interactions following ZnPc photoexcitation. At a first glance, the ZnPc ⋅ +-C60 ⋅ − charge-separated state lifetime increased from 0.4 to 86.6 ns as the electron donor-acceptor separation increased from 8.8 to 29.1 Å. A closer look at the kinetics revealed that the changes in charge-separated state lifetime are tied to a decrease in the electronic coupling element from 132 to 1.2 cm−1, an increase in the reorganization energy of charge transfer from 0.43 to 0.63 eV, and a large attenuation factor of 0.27 Å−1.
Τίτλος πηγής δημοσίευσης:	ChemPhysChem
Τόμος/Κεφάλαιο:	20
Τεύχος:	21
Σελίδες:	2806-2815
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	attenuation factors electron transfer fullerenes oligo(p-phenylenevinylenes) phthalocyanines
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Σημειώσεις:	T1EDK-01504; Ministerio de Economía y Competitividad, MINECO: CTQ2017-85393-P; General Secretariat for Research and Technology, GSRT; University of Crete, UoC; European Regional Development Fund, FEDER; Hellenic Foundation for Research and Innovation, ΕΛ.ΙΔ.Ε.Κ: 508 This work has been supported by MINECO, Spain (CTQ2017-85393-P), General Secretariat for Research and Technology (GSRT) and Hellenic Foundation for Research and Innovation (HFRI) (project code: 508) are gratefully acknowledged for the financial support of this research. This research has been co-financed by the European Regional Development Fund of the European Union and Greek national funds through the Operational Program Competitiveness, Entrepreneurship and Innovation, under the call RESEARCH CREATE INNOVATE (project code: T1EDK-01504) as well as the Special Research Account of the University of Crete.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο