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Title: Performance of Density-Functional Tight-Binding in Comparison to Ab Initio and First-Principles Methods for Isomer Geometries and Energies of Glucose Epimers in Vacuo and Solution

Journal Article · · ACS Omega

Density functional theory (DFT) is a widely used methodology for the computation of molecular and electronic structure, and we confirm that B3LYP and the high-level ab initio G3B3 method are in excellent agreement for the lowest-energy isomers of the 16 glucose epimers. Density-functional tight-binding (DFTB) is an approximate version of DFT with typically comparable accuracy that is 2 to 3 orders of magnitude faster, therefore generally very suitable for processing large numbers of complex structures. Conformational isomerism in sugars is well known to give rise to a large number of isomer structures. On the basis of a comprehensive study of glucose epimers in vacuo and aqueous solution, we found that the performance of DFTB is on par to B3LYP in terms of geometrical parameters excluding hydrogen bonds and isomer energies. However, DFTB underestimates both hydrogen bonding interactions as well as torsional barriers associated with rotations of the hydroxy groups, resulting in a counterintuitive overemphasis of hydrogen bonding in both gas phase as well as in water. Although the associated root mean squared deviation from B3LYP within epimer isomer groups is only on the order of 1 kcal/mol, this deviation affects the correct assignment of major isomer ordering, which span less than 10 kcal/mol. Both second- as well as third-order DFTB methods are exhibiting similar deviations from B3LYP. Even after the inclusion of empirical dispersion corrections in vacuum, these deviations remain for a large majority of isomer energies and geometries when compared to dispersion-corrected B3LYP.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
OSTI ID:
1484977
Alternate ID(s):
OSTI ID: 1488722; OSTI ID: 1508802
Journal Information:
ACS Omega, Vol. 3, Issue 12; ISSN 2470-1343
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Density functional tight binding
  • Elstner, Marcus; Seifert, Gotthard
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 372, Issue 2011 https://doi.org/10.1098/rsta.2012.0483
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The Self-Consistent Charge Density Functional Tight Binding Method Applied to Liquid Water and the Hydrated Excess Proton: Benchmark Simulations journal May 2010
Ring Puckering: A Metric for Evaluating the Accuracy of AM1, PM3, PM3CARB-1, and SCC-DFTB Carbohydrate QM/MM Simulations journal December 2010
DFT Energy Optimization of a Large Carbohydrate: Cyclomaltohexaicosaose (CA-26) journal December 2011
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Atomic-scale insights on hydrogen trapping and exclusion at incoherent interfaces of nanoprecipitates in martensitic steels journal July 2022
Stepwise gating of the Sec61 protein-conducting channel by Sec63 and Sec62 journal January 2021
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Application of London-type dispersion corrections to the solid-state density functional theory simulation of the terahertz spectra of crystalline pharmaceuticals journal January 2011
Dispersion interactions of carbohydrates with condensate aromatic moieties: Theoretical study on the CH–π interaction additive properties journal January 2011
Stability of conformationally locked free fructose: theoretical and computational insights journal January 2015
Assessment of Gaussian-3 and density-functional theories on the G3/05 test set of experimental energies journal September 2005
A new mixing of Hartree–Fock and local density‐functional theories journal January 1993
Gaussian-3 (G3) theory for molecules containing first and second-row atoms journal November 1998
Assessment of Gaussian-3 and density functional theories for a larger experimental test set journal May 2000
An extension of the GROMOS force field for carbohydrates, resulting in improvement of the crystal structure determination of α- D -galactose journal April 1995
Taking a snapshot of the triplet excited state of an OLED organometallic luminophore using X-rays text January 2020

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