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High-resolution photoelectron spectra of the pyrimidine-type nucleobases.
J Chem Phys. 2015 Jun 14; 142(22):224310.JC

Abstract

High-resolution photoelectron spectra of the gas phase pyrimidine-type nucleobases, thymine, uracil, and cytosine, were collected using synchrotron radiation over the photon energy range 17 ≤ hν ≤ 150 eV. These data provide the highest resolution photoelectron spectra of thymine, uracil, and cytosine published to date. By comparing integrated regions of the energy dependent photoelectron spectra of thymine, the ionization potentials of the first four ionic states of thymine were estimated to be 8.8, 9.8, 10.3, and 10.8 eV. The thymine data also show evidence for low energy shape resonances in three of the outermost valence electronic states. Comparing the uracil spectrum with the thymine spectrum, the four outermost valence electronic states of uracil likely begin at binding energies 9.3, 9.9, 10.5, and 11.0 eV. High-resolution spectra indicate only one tautomeric form of cytosine contributes significantly to the spectrum with the four outermost valence electronic states beginning at binding energies 8.9, 9.9, 10.4, and 10.85 eV.

Authors+Show Affiliations

Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

26071713

Citation

Fulfer, K D., et al. "High-resolution Photoelectron Spectra of the Pyrimidine-type Nucleobases." The Journal of Chemical Physics, vol. 142, no. 22, 2015, p. 224310.
Fulfer KD, Hardy D, Aguilar AA, et al. High-resolution photoelectron spectra of the pyrimidine-type nucleobases. J Chem Phys. 2015;142(22):224310.
Fulfer, K. D., Hardy, D., Aguilar, A. A., & Poliakoff, E. D. (2015). High-resolution photoelectron spectra of the pyrimidine-type nucleobases. The Journal of Chemical Physics, 142(22), 224310. https://doi.org/10.1063/1.4922310
Fulfer KD, et al. High-resolution Photoelectron Spectra of the Pyrimidine-type Nucleobases. J Chem Phys. 2015 Jun 14;142(22):224310. PubMed PMID: 26071713.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High-resolution photoelectron spectra of the pyrimidine-type nucleobases. AU - Fulfer,K D, AU - Hardy,D, AU - Aguilar,A A, AU - Poliakoff,E D, PY - 2015/6/15/entrez PY - 2015/6/15/pubmed PY - 2016/3/11/medline SP - 224310 EP - 224310 JF - The Journal of chemical physics JO - J Chem Phys VL - 142 IS - 22 N2 - High-resolution photoelectron spectra of the gas phase pyrimidine-type nucleobases, thymine, uracil, and cytosine, were collected using synchrotron radiation over the photon energy range 17 ≤ hν ≤ 150 eV. These data provide the highest resolution photoelectron spectra of thymine, uracil, and cytosine published to date. By comparing integrated regions of the energy dependent photoelectron spectra of thymine, the ionization potentials of the first four ionic states of thymine were estimated to be 8.8, 9.8, 10.3, and 10.8 eV. The thymine data also show evidence for low energy shape resonances in three of the outermost valence electronic states. Comparing the uracil spectrum with the thymine spectrum, the four outermost valence electronic states of uracil likely begin at binding energies 9.3, 9.9, 10.5, and 11.0 eV. High-resolution spectra indicate only one tautomeric form of cytosine contributes significantly to the spectrum with the four outermost valence electronic states beginning at binding energies 8.9, 9.9, 10.4, and 10.85 eV. SN - 1089-7690 UR - https://www.unboundmedicine.com/medline/citation/26071713/High_resolution_photoelectron_spectra_of_the_pyrimidine_type_nucleobases_ L2 - https://doi.org/10.1063/1.4922310 DB - PRIME DP - Unbound Medicine ER -