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A computational study of microsolvation effect on ethylene glycol by density functional method.
Ajay Chaudhari1, Shyi-Long Lee
1Department of Chemistry and Biochemistry, National Chung Cheng University, Ming-Hsiung, Chiayi-621, Taiwan.
The Journal of Chemical Physics
|July 23, 2004
Summary
This study reveals that cyclic structures, where water molecules bridge ethylene glycol
Area of Science:
- Computational Chemistry
- Molecular Modeling
- Physical Chemistry
Background:
- Ethylene glycol is a key industrial chemical.
- Understanding its interactions with water is crucial for various applications.
- Hydrogen bonding plays a significant role in molecular complexes.
Purpose of the Study:
- To investigate the conformational landscape of ethylene glycol-(water)n complexes (n=1-3).
- To determine the binding energies and stability of different conformers.
- To analyze the contributions of many-body interactions to the complex's stability.
Main Methods:
- Density Functional Theory (DFT) calculations.
- Utilizing the 6-311++G* basis set.
- Employing basis set superposition error (BSSE) correction.
- Performing many-body interaction analysis.
Main Results:
- Identified various conformers for ethylene glycol-(water)n (n=1-3).
- Calculated BSSE-corrected total energies and binding energies for the lowest energy conformers.
- Found significant contributions from relaxation energy, two-body, and three-body interactions for the n=3 complex.
- Observed negligible four-body energy contributions.
- Determined that cyclic structures are the most stable.
Conclusions:
- The most stable configurations of ethylene glycol-(water)n complexes involve cyclic structures.
- Water molecules act as bridges between the hydroxyl groups of ethylene glycol.
- Many-body interactions, particularly up to three-body terms, are critical for the stability of larger complexes.