title: Ultrafast spectroscopy of linear carbon chains: the case of dinaphthylpolyynes.
abstract: The dynamics of excited states in α,ω-dinaphthylpolyyne, a class of linear sp-carbon chains, has been investigated by ultrafast transient absorption spectroscopy and DFT//TDDFT calculations. We show that the role of molecular conformers, in which end-capped naphthalene rings are planar or perpendicular to the polyyne plane, is fundamental for understanding both the steady state properties, such as UV-Vis absorption spectra and vibronic transitions, and the ultrafast transient absorption features. In particular, we observed in one of the conformers the ultrafast formation of a narrow photo-induced absorption band rising within 30 ps. This band can be assigned to an inter-system crossing event leading to the formation of triplet excited states.
authors: Center for Nano Science and Technology CNST@Polimi, Istituto Italiano di Tecnologia, Milano, Italy.
authors: D
authors: D
authors: Fazzi
authors: F
authors: F
authors: Scotognella
authors: A
authors: A
authors: Milani
authors: D
authors: D
authors: Brida
authors: C
authors: C
authors: Manzoni
authors: E
authors: E
authors: Cinquanta
authors: M
authors: M
authors: Devetta
authors: L
authors: L
authors: Ravagnan
authors: P
authors: P
authors: Milani
authors: F
authors: F
authors: Cataldo
authors: L
authors: L
authors: Lüer
authors: R
authors: R
authors: Wannemacher
authors: J
authors: J
authors: Cabanillas-Gonzalez
authors: M
authors: M
authors: Negro
authors: S
authors: S
authors: Stagira
authors: C
authors: C
authors: Vozzi