Excimer formation in a new class of terthiophene-based fluorophores covalently bonded to a cyclotetrasiloxane scaffold has been demonstrated and the photophysical process ruling it has been investigated in detail and modeled theoretically. In contrast to the conventional systems in which long-living fluorophores such as pyrene are linked in the same molecule, an excimer is formed only when two terthiophene- based branches nano-organized on the same cyclotetrasiloxane scaffold are close enough together when excitation takes place. In such a case, excimer formation is extremely efficient, and the new bound excited states are quite stable.

Oligothiophenes Nano-​organized on a Cyclotetrasiloxane Scaffold as a Model of a Silica-​Bound Monolayer: Evidence for Intramolecular Excimer Formation / W. Mroz, J. P. Bombenger, C.Botta, A. Orbelli Biroli, M. Pizzotti, F. De Angelis, L. Belpassi, R.Tubino, F. Meinardi. - In: CHEMISTRY-A EUROPEAN JOURNAL. - ISSN 0947-6539. - 15:46(2009), pp. 12791-12798.

Oligothiophenes Nano-​organized on a Cyclotetrasiloxane Scaffold as a Model of a Silica-​Bound Monolayer: Evidence for Intramolecular Excimer Formation

A. Orbelli Biroli;M. Pizzotti;
2009

Abstract

Excimer formation in a new class of terthiophene-based fluorophores covalently bonded to a cyclotetrasiloxane scaffold has been demonstrated and the photophysical process ruling it has been investigated in detail and modeled theoretically. In contrast to the conventional systems in which long-living fluorophores such as pyrene are linked in the same molecule, an excimer is formed only when two terthiophene- based branches nano-organized on the same cyclotetrasiloxane scaffold are close enough together when excitation takes place. In such a case, excimer formation is extremely efficient, and the new bound excited states are quite stable.
Settore CHIM/03 - Chimica Generale e Inorganica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/145011
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