Premium
Computation of large systems with an economic basis set: Structures and reactivity indices of nucleic acid base pairs from density functional theory
Author(s) -
Fan W. J.,
Zhang R. Q.,
Liu Shubin
Publication year - 2007
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/jcc.20670
Subject(s) - basis set , electronegativity , basis (linear algebra) , density functional theory , computational chemistry , chemistry , nucleic acid , computation , dipole , moment (physics) , statistical physics , mathematics , quantum mechanics , algorithm , physics , geometry , biochemistry , organic chemistry
We show here that an economic basis set can describe nucleic acid base pairs involving the hydrogen bond interactions in density functional calculations. The economic basis set in which the polarization function is added only to oxygen and nitrogen atoms of strong electronegativity can predict reliable geometric structures and dipole moment of nucleic acid base pairs, comparable to those obtained from the basis set of 6‐31G* in B3LYP calculations. Combining single point calculations with the standard basis set on the geometric structures optimized by the economic basis set, the present approach has predicted accurate natural bond orbital charge, binding energy, electronegativity, hardness, softness, and electrophilicity index. The principle for basis selection presented in this study can be regarded as a general guideline in the computation of large biological systems with considerably high accuracy and low computational expense. © 2007 Wiley Periodicals, Inc. J Comput Chem, 2007