Density functional theory analysis of the impact of steric interaction on the function of switchable polarity solvents
Abstract
Here, a density functional theory (DFT) analysis has been performed to explore the impact of steric interactions on the function of switchable polarity solvents (SPS) and their implications on a quantitative structure-activity relationship (QSAR) model previously proposed for SPS. An x-ray crystal structure of the N,N-dimethylcyclohexylammonium bicarbonate (Hdmcha) salt has been solved as an asymmetric unit containing two cation/anion pairs, with a hydrogen bonding interaction observed between the bicarbonate anions, as well as between the cation and anion in each pair. DFT calculations provide an optimized structure of Hdmcha that closely resembles experimental data and reproduces the cation/anion interaction with the inclusion of a dielectric field. Relaxed potential energy surface (PES) scans have been performed on Hdmcha-based computational model compounds, differing in the size of functional group bonded to the nitrogen center, to assess the steric impact of the group on the relative energy and structural properties of the compound. Results suggest that both the length and amount of branching associated with the substituent impact the energetic limitations on rotation of the group along the N-R bond and NC-R bond, and disrupt the energy minimized position of the hydrogen bonded bicarbonate group. The largest interaction resulted from functional groups thatmore »
- Authors:
-
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Bruker AXS Inc., Madison, WI (United States)
- Publication Date:
- Research Org.:
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1248171
- Report Number(s):
- INL/JOU-15-34387
Journal ID: ISSN 1520-6106
- Grant/Contract Number:
- AC07-05ID14517
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry
- Additional Journal Information:
- Journal Volume: 119; Journal Issue: 22; Journal ID: ISSN 1520-6106
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; density functional theory; switchable polarity solvent; sterics; computational chemistry; physical organic chemistry
Citation Formats
McNally, Joshua S., Noll, Bruce, Orme, Christopher J., and Wilson, Aaron D. Density functional theory analysis of the impact of steric interaction on the function of switchable polarity solvents. United States: N. p., 2015.
Web. doi:10.1021/acs.jpcb.5b03167.
McNally, Joshua S., Noll, Bruce, Orme, Christopher J., & Wilson, Aaron D. Density functional theory analysis of the impact of steric interaction on the function of switchable polarity solvents. United States. https://doi.org/10.1021/acs.jpcb.5b03167
McNally, Joshua S., Noll, Bruce, Orme, Christopher J., and Wilson, Aaron D. Mon .
"Density functional theory analysis of the impact of steric interaction on the function of switchable polarity solvents". United States. https://doi.org/10.1021/acs.jpcb.5b03167. https://www.osti.gov/servlets/purl/1248171.
@article{osti_1248171,
title = {Density functional theory analysis of the impact of steric interaction on the function of switchable polarity solvents},
author = {McNally, Joshua S. and Noll, Bruce and Orme, Christopher J. and Wilson, Aaron D.},
abstractNote = {Here, a density functional theory (DFT) analysis has been performed to explore the impact of steric interactions on the function of switchable polarity solvents (SPS) and their implications on a quantitative structure-activity relationship (QSAR) model previously proposed for SPS. An x-ray crystal structure of the N,N-dimethylcyclohexylammonium bicarbonate (Hdmcha) salt has been solved as an asymmetric unit containing two cation/anion pairs, with a hydrogen bonding interaction observed between the bicarbonate anions, as well as between the cation and anion in each pair. DFT calculations provide an optimized structure of Hdmcha that closely resembles experimental data and reproduces the cation/anion interaction with the inclusion of a dielectric field. Relaxed potential energy surface (PES) scans have been performed on Hdmcha-based computational model compounds, differing in the size of functional group bonded to the nitrogen center, to assess the steric impact of the group on the relative energy and structural properties of the compound. Results suggest that both the length and amount of branching associated with the substituent impact the energetic limitations on rotation of the group along the N-R bond and NC-R bond, and disrupt the energy minimized position of the hydrogen bonded bicarbonate group. The largest interaction resulted from functional groups that featured five bonds between the ammonium proton and a proton on a functional group with the freedom of rotation to form a pseudo-six membered ring which included both protons.},
doi = {10.1021/acs.jpcb.5b03167},
journal = {Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry},
number = 22,
volume = 119,
place = {United States},
year = {Mon May 04 00:00:00 EDT 2015},
month = {Mon May 04 00:00:00 EDT 2015}
}
Web of Science
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