title: The determination of absolute electron affinities of the purines and pyrimidines in DNA and RNA from reversible reduction potentials.
abstract: We report the reversible reduction potentials of the purines and pyrimidines of DNA and RNA. These were determined in dimethylsulfoxide using cyclic voltammetry. The absolute electron affinities have been determined from these reduction potentials by calibration with the absolute electron affinities for acridine and anthracene measured in the gas phase. These are the first experimentally determined values of the electron affinities of these purines and pyrimidines and are: Guanine = 1.51 eV, Adenine = 0.95 eV, Uracil = 0.80 eV, Thymine = 0.79 eV and Cytosine = 0.56 eV.
authors.affiliation: Division of Science and Engineering, University of Texas, Odessa 79762.
authors.forename: J R
authors.initials: JR
authors.lastname: Wiley
authors.forename: J M
authors.initials: JM
authors.lastname: Robinson
authors.forename: S
authors.initials: S
authors.lastname: Ehdaie
authors.forename: E C
authors.initials: EC
authors.lastname: Chen
authors.forename: E S
authors.initials: ES
authors.lastname: Chen
authors.forename: W E
authors.initials: WE
authors.lastname: Wentworth
mesh_terms: D000225:Adenine / Q000737:chemistry; D003596:Cytosine / Q000737:chemistry; D004247:DNA / Q000737:chemistry*; D006147:Guanine / Q000737:chemistry; D011199:Potentiometry / Q000379:methods; D011687:Purines / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*; D012313:RNA / Q000737:chemistry*; D013941:Thymine / Q000737:chemistry; D014498:Uracil / Q000737:chemistry
chemical_list: D011687:Purines; D011743:Pyrimidines; D014498:Uracil; D006147:Guanine; D012313:RNA; D003596:Cytosine; D004247:DNA; D000225:Adenine; D013941:Thymine