Oligothiophenes nano-organized on a cyclotetrasiloxane scaffold as a model of a silica-bound monolayer: evidence for intramolecular excimer formation.
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.
Istituto per lo Studio delle Macromolecole, CNR, Via Bassini 15, 20133 Milano, Italy.
Wojciech
W
Mróz
Jean Philippe
JP
Bombenger
Chiara
C
Botta
Alessio
A
Orbelli Biroli
Maddalena
M
Pizzotti
Filippo
F
De Angelis
Leonardo
L
Belpassi
Riccardo
R
Tubino
Francesco
F
Meinardi