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Theoretical determination of electron affinity and ionization potential of DNA and RNA bases
Author(s) -
Russo Nino,
Toscano Marirosa,
Grand André
Publication year - 2000
Publication title -
journal of computational chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.907
H-Index - 188
eISSN - 1096-987X
pISSN - 0192-8651
DOI - 10.1002/1096-987x(20001115)21:14<1243::aid-jcc3>3.0.co;2-m
Subject(s) - thymine , uracil , guanine , cytosine , electron affinity (data page) , chemistry , nucleobase , ionization , affinities , ionization energy , electron , basis set , dna , computational chemistry , adiabatic process , density functional theory , stereochemistry , molecule , physics , nucleotide , biochemistry , quantum mechanics , ion , organic chemistry , gene
The ionization potentials and electron affinities of thymine, cytosine, adenine, guanine, and uracil were determined at density functional level using different exchange‐correlation functionals and basis sets. Results showed that the computed ionization potentials are very close to the experimental counterparts. The sign of adiabatic electron affinities of adenine, thymine, and uracil is unaffected by the used level of theory while that for guanine and cytosine depends on both the used potential and basis set. Vertical electron affinities are always negative in agreement with the experimental indications. © 2000 John Wiley & Sons, Inc. J Comput Chem 21: 1243–1250, 2000