Thiobases are DNA or RNA nucleobases where an exocyclic carbonyl oxygen is replaced by a sulfur atom [1]. Thiation induces a red-shift in the absorption spectrum and causes also a dramatic change in the photophysics with respect to the canonical nucleobases: while in DNA/RNA monomers internal conversion from the photoexcited singlet 1ππ state to the ground state mediated by a conical intersection (CI) is the main deactivation channel, the major relaxation pathway in thiobases is via the population of triplet states through an ultrafast intersystem crossing (ISC). Thiobases have attracted much interest in recent years due to their photo-therapeutic applications [1]. In spite of that, their ultrafast deactivation mechanisms are still debated.

Intersystem crossing in thiobases proceeds by a dark intermediate state / Borrego-Varillas R.; Teles-Ferreira D.C.; Nenov A.; Conti I.; Ganzer L.; Manzoni C.; De Paula A.M.; Garavelli M.; Cerullo G.. - STAMPA. - (2019), pp. 8872452.1-8872452.1. (Intervento presentato al convegno 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 tenutosi a deu nel 2019) [10.1109/CLEOE-EQEC.2019.8872452].

Intersystem crossing in thiobases proceeds by a dark intermediate state

Nenov A.;Conti I.;Garavelli M.;
2019

Abstract

Thiobases are DNA or RNA nucleobases where an exocyclic carbonyl oxygen is replaced by a sulfur atom [1]. Thiation induces a red-shift in the absorption spectrum and causes also a dramatic change in the photophysics with respect to the canonical nucleobases: while in DNA/RNA monomers internal conversion from the photoexcited singlet 1ππ state to the ground state mediated by a conical intersection (CI) is the main deactivation channel, the major relaxation pathway in thiobases is via the population of triplet states through an ultrafast intersystem crossing (ISC). Thiobases have attracted much interest in recent years due to their photo-therapeutic applications [1]. In spite of that, their ultrafast deactivation mechanisms are still debated.
2019
2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
1
1
Intersystem crossing in thiobases proceeds by a dark intermediate state / Borrego-Varillas R.; Teles-Ferreira D.C.; Nenov A.; Conti I.; Ganzer L.; Manzoni C.; De Paula A.M.; Garavelli M.; Cerullo G.. - STAMPA. - (2019), pp. 8872452.1-8872452.1. (Intervento presentato al convegno 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019 tenutosi a deu nel 2019) [10.1109/CLEOE-EQEC.2019.8872452].
Borrego-Varillas R.; Teles-Ferreira D.C.; Nenov A.; Conti I.; Ganzer L.; Manzoni C.; De Paula A.M.; Garavelli M.; Cerullo G.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/735963
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