Intersystem crossing in thiobases proceeds by a dark intermediate state

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dc.creatorRocio Borrego Varillas
dc.creatorDanielle Cristina Teles Ferreira
dc.creatorArtur Nenov
dc.creatorIrene Conti
dc.creatorLucia Ganzer
dc.creatorCristian Manzoni
dc.creatorAna Maria de Paula
dc.creatorMarco Garavelli
dc.creatorGiulio Cerullo
dc.date.accessioned2023-02-28T18:41:16Z
dc.date.accessioned2025-09-09T01:12:27Z
dc.date.available2023-02-28T18:41:16Z
dc.date.issued2019
dc.identifier.doihttps://doi.org/10.1109/CLEOE-EQEC.2019.8872452
dc.identifier.isbn978-1-7281-0469-0
dc.identifier.urihttps://hdl.handle.net/1843/50519
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.rightsAcesso Restrito
dc.subjectDNA
dc.subjectÁcido ribonucleico
dc.subjectBioquímica
dc.subject.otherDNA
dc.subject.otherÁcido ribonucleico
dc.subject.otherBioquímica
dc.titleIntersystem crossing in thiobases proceeds by a dark intermediate state
dc.typeArtigo de evento
local.description.resumoThiobases 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 1 ππ* 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. In spite of that, their ultrafast deactivation mechanisms are still debated.
local.identifier.orcidhttps://orcid.org/0000-0002-4499-0558
local.identifier.orcidhttps://orcid.org/0000-0001-8001-4709
local.identifier.orcidhttps://orcid.org/0000-0003-3071-5341
local.identifier.orcidhttps://orcid.org/0000-0001-7982-4480
local.identifier.orcidhttps://orcid.org/0000-0002-4169-8869
local.identifier.orcidhttps://orcid.org/0000-0002-8551-5948
local.identifier.orcidhttps://orcid.org/0000-0002-0796-289X
local.identifier.orcidhttps://orcid.org/0000-0002-9534-2702
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.initialsUFMG
local.url.externahttps://ieeexplore.ieee.org/document/8872452

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