Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Fullerene-Coumarin Dyad as a Selective Metal Receptor: Synthesis, Photophysical Properties, Electrochemistry and Ion Binding Studies
Δημιουργός/Συγγραφέας:	Pagona, Georgia Economopoulos, Solon P. Tsikalas, George K. Katerinopoulos, Haralambos E. [EL] Ταγματάρχης, Νίκος[EN] Tagmatarchis, Nikos
Τόπος έκδοσης:	MALDEN
Ημερομηνία:	2010
Γλώσσα:	Αγγλικά
DOI:	10.1002/chem.201001665
Περίληψη:	A coumarin derivative with a malonate unit has been synthesized and used for the preparation of a fullerene coumarin dyad through the Bingel cyclopropanation method. The newly synthesized dyad is soluble in organic solvents and has been fully characterized with traditional spectroscopic techniques. Electronic interactions between the two components of the dyad were probed with the aid of UV/Vis spectroscopy, fluorescence emission, and electrochemistry measurements. Our studies clearly show the presence of electronic interactions between C(60) and modified coumarin in the ground state; efficient electron-transfer quenching of the singlet excited state of the coumarin moiety by the appended fullerene sphere was also observed. Time-resolved fluorescence measurements revealed lifetimes for the coumarin-C(60) dyad at a maximum of 50 Ps, while the quantum yield was reaching unity. Additionally, the redox potentials of the C(60)-coumarin dyad were determined and the energetics of the electron-transfer processes were evaluated. Finally, after alkaline treatment of C(60)-coumarin, which resulted in the deprotection of carboxylate units, the dyad was tested as a metal receptor for divalent metal cations; ion competition studies and fluorescence experiments showed binding selectivity for lead ions.
Τίτλος πηγής δημοσίευσης:	Chemistry-A European Journal
Τόμος/Κεφάλαιο:	16
Τεύχος:	39
Σελίδες:	11969-11976
Θεματική Κατηγορία:	[EL] Χημεία (Γενικά)[EN] Chemistry (General)
Λέξεις-Κλειδιά:	coumarin dyes/pigments fullerenes hybrid materials metal receptors
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
EU Grant identifier:	info:eu-repo/grantAgreement/EC/FP7/201729
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο