Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	(Terpyridine)copper(II)-carbon nanohorns: Metallo-nanocomplexes for photoinduced charge separation
Δημιουργός/Συγγραφέας:	Rotas, Georgios Sandanayaka, Atula S. D. [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos Ichihashi, Toshinari Yudasaka, Masako Lijima, Sumio Ito, Osamu
Εκδότης:	John Wiley & Sons, Inc.
Τόπος έκδοσης:	WASHINGTON
Ημερομηνία:	2008-04-09
Γλώσσα:	Αγγλικά
ISSN:	0002-7863
DOI:	10.1021/ja077090t
Περίληψη:	New metallo-nanostructured materials of carbon nanohorns (CNHs), within the family of elongated carbon nanotubes, have been prepared by the coordination of copper(II)-2,2':6',2 ''-terpyridine (Cu(II)tpy) with oxidized carbon nanohorns (CNHs-COOH). The resulted CNHs-COO-Cu(II)tpy metallo-nanocomplexes have been characterized by diverse analytical spectroscopic tools and cyclic and differential pulse voltammetry. Scanning transmission electron microscopy (STEM), dynamic light scattering (DLS), and energy dispersive X-ray spectroscopy (EDX) measurements have been employed to probe the morphological characteristics and particle-size distribution of CNHs-COO-Cu(II)tpy as well as to investigate the elemental composition of the metallo-nanocomplex. Steady-state and time-resolved fluorescence emission studies have shown efficient fluorescence quenching, suggesting that electron transfer occurs from the singlet excited state of Cu(II)tpy to CNHs. Photoexcitation of Cu(II)tpy resulted in the one-electron reduction of nanohorns with a simultaneous one-electron oxidation of the Cu(II)tpy unit (CNHs(center dot-)-COO-(Cu(II)tpy)(center dot+)) as revealed by transient absorption measurements. The charge-separated state of CNHs(center dot-)-COO-(Cu(II)tpy)(center dot+) has been confirmed with the aid of an electron mediator, such as hexyl-viologen dication (HV2+) and an electron-hole shifter in polar solvents.
Τίτλος πηγής δημοσίευσης:	Journal of the American Chemical Society
Τόμος/Κεφάλαιο:	130
Τεύχος:	14
Σελίδες:	4725-4731
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General)
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© AMER CHEMICAL SOC
Ηλεκτρονική διεύθυνση περιοδικού (link) :	http://pubs.acs.org/journals/jacsat/index.html
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο