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Updated: May 20, 2026

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
Dynamics of water/methanol mixtures at functionalized chromatographic interfaces
Prashant Kumar Gupta1, Markus Meuwly
1Department of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland.
Abstract:
Fully atomistic simulations of water/methanol mixtures of varying compositions (80/20 and 50/50) at chromatographic interfaces with different functionalizations are presented. The dynamical properties in terms of equilibration times and solvent exchange dynamics are characterized and found to depend on the different systems on the nanosecond time scale. The solvent density profile and the structuring of the stationary phase differ for derivatizations including (-CN, NO(2), -NH(2), -C(6)H(5)) of the C(18) chain. The time scale and intensity of the water exchange dynamics differs for the different realizations of the chromatographic systems and ranges from 200 to 500 ps. Water exchange rates depend on solvent composition as well as on the functionalization of alkyl chains. Simulations with acridine as a probe molecule provide atomistic insight into the slot model.
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