Decay Pathways of Thymine Revisited

Bert M. Pilles; Benjamin Maerz; Jinquan Chen; Dominik B. Bucher; Peter Gilch; Bern Kohler; Wolfgang Zinth; Benjamin P. Fingerhut; Wolfgang J. Schreier

doi:10.1021/acs.jpca.8b02050

Decay Pathways of Thymine Revisited

Bert M. Pilles, Benjamin Maerz, Jinquan Chen, Dominik B. Bucher, Peter Gilch, Bern Kohler, Wolfgang Zinth, Benjamin P. Fingerhut, Wolfgang J. Schreier

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

28 Zitate (Scopus)

Abstract

The decay of electronically excited states of thymine (Thy) and thymidine 5′-monophosphate (TMP) was studied by time-resolved UV/vis and IR spectroscopy. In addition to the well-established ultrafast internal conversion to the ground state, a so far unidentified UV-induced species is observed. In D₂O, this species decays with a time constant of 300 ps for thymine and of 1 ns for TMP. The species coexists with the lowest triplet state and is formed with a comparably high quantum yield of about 10% independent of the solvent. The experimentally determined spectral signatures are discussed in the light of quantum chemical calculations of the singlet and triplet excited states of thymine.

Originalsprache	Englisch
Seiten (von - bis)	4819-4828
Seitenumfang	10
Fachzeitschrift	Journal of Physical Chemistry A
Jahrgang	122
Ausgabenummer	21
DOIs	https://doi.org/10.1021/acs.jpca.8b02050
Publikationsstatus	Veröffentlicht - 31 Mai 2018
Extern publiziert	Ja

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10.1021/acs.jpca.8b02050

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title = "Decay Pathways of Thymine Revisited",

abstract = "The decay of electronically excited states of thymine (Thy) and thymidine 5′-monophosphate (TMP) was studied by time-resolved UV/vis and IR spectroscopy. In addition to the well-established ultrafast internal conversion to the ground state, a so far unidentified UV-induced species is observed. In D2O, this species decays with a time constant of 300 ps for thymine and of 1 ns for TMP. The species coexists with the lowest triplet state and is formed with a comparably high quantum yield of about 10% independent of the solvent. The experimentally determined spectral signatures are discussed in the light of quantum chemical calculations of the singlet and triplet excited states of thymine.",

author = "Pilles, {Bert M.} and Benjamin Maerz and Jinquan Chen and Bucher, {Dominik B.} and Peter Gilch and Bern Kohler and Wolfgang Zinth and Fingerhut, {Benjamin P.} and Schreier, {Wolfgang J.}",

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T1 - Decay Pathways of Thymine Revisited

AU - Pilles, Bert M.

AU - Maerz, Benjamin

AU - Chen, Jinquan

AU - Bucher, Dominik B.

AU - Gilch, Peter

AU - Kohler, Bern

AU - Zinth, Wolfgang

AU - Fingerhut, Benjamin P.

AU - Schreier, Wolfgang J.

PY - 2018/5/31

Y1 - 2018/5/31

N2 - The decay of electronically excited states of thymine (Thy) and thymidine 5′-monophosphate (TMP) was studied by time-resolved UV/vis and IR spectroscopy. In addition to the well-established ultrafast internal conversion to the ground state, a so far unidentified UV-induced species is observed. In D2O, this species decays with a time constant of 300 ps for thymine and of 1 ns for TMP. The species coexists with the lowest triplet state and is formed with a comparably high quantum yield of about 10% independent of the solvent. The experimentally determined spectral signatures are discussed in the light of quantum chemical calculations of the singlet and triplet excited states of thymine.

AB - The decay of electronically excited states of thymine (Thy) and thymidine 5′-monophosphate (TMP) was studied by time-resolved UV/vis and IR spectroscopy. In addition to the well-established ultrafast internal conversion to the ground state, a so far unidentified UV-induced species is observed. In D2O, this species decays with a time constant of 300 ps for thymine and of 1 ns for TMP. The species coexists with the lowest triplet state and is formed with a comparably high quantum yield of about 10% independent of the solvent. The experimentally determined spectral signatures are discussed in the light of quantum chemical calculations of the singlet and triplet excited states of thymine.

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JO - Journal of Physical Chemistry A

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Decay Pathways of Thymine Revisited

Abstract

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