Experimental and Modeling Studies of Local and Nanoscale para-Cresol Behavior: A Comparison of Classical Force Fields.

ABSTRACT: The dynamics of bulk liquid para-cresol from 340-390 K was probed using a tandem quasielastic neutron scattering (QENS) and molecular dynamics (MD) approach, due to its relevance as a simple model component of lignin pyrolysis oil. QENS experiments observed both translational jump diffusion and isotropic rotation, with diffusion coefficients ranging from 10.1 to 28.6 × 10^-10 m²s^-1 and rotational rates from 5.7 to 9.2 × 10¹⁰ s^-1. The associated activation energies were 22.7 ± 0.6 and 10.1 ± 1.2 kJmol^-1 for the two different dynamics. MD simulations applying two different force field models (OPLS3 and OPLS2005) gave values close to the experimental diffusion coefficients and rotational rates obtained upon calculating th

SUBMITTER: Morton KSC 

PROVIDER: S-EPMC10123653 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature