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Solvation of fluoro-acetonitrile in water by 2D-IR spectroscopy: A combined experimental-computational study

Cazade, Pierre-André and Tran, Halina and Bereau, Tristan and Das, Akshaya K. and Kläsi, Felix and Hamm, Peter and Meuwly, Markus. (2015) Solvation of fluoro-acetonitrile in water by 2D-IR spectroscopy: A combined experimental-computational study. Journal of Chemical Physics, 142 (21). p. 212415.

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Abstract

The solvent dynamics around fluorinated acetonitrile is characterized by 2-dimensional infrared spectroscopy and atomistic simulations. The lineshape of the linear infrared spectrum is better captured by semiempirical (density functional tight binding) mixed quantum mechanical/molecular mechanics simulations, whereas force field simulations with multipolar interactions yield lineshapes that are significantly too narrow. For the solvent dynamics, a relatively slow time scale of 2 ps is found from the experiments and supported by the mixed quantum mechanical/molecular mechanics simulations. With multipolar force fields fitted to the available thermodynamical data, the time scale is considerably faster--on the 0.5 ps time scale. The simulations provide evidence for a well established CF-HOH hydrogen bond (population of 25%) which is found from the radial distribution function g(r) from both, force field and quantum mechanics/molecular mechanics simulations.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Physikalische Chemie (Meuwly)
UniBasel Contributors:Meuwly, Markus
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:AIP Publishing
ISSN:0021-9606
Note:Publication type according to Uni Basel Research Database: Journal article -- The final publication is available at AIP, see DOI link.
Language:English
Identification Number:
Last Modified:07 Dec 2016 15:09
Deposited On:25 Apr 2016 12:10

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