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A molecular mechanics force field for lignin

✍ Scribed by Loukas Petridis; Jeremy C. Smith

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
371 KB
Volume
30
Category
Article
ISSN
0192-8651

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✦ Synopsis

Abstract

A CHARMM molecular mechanics force field for lignin is derived. Parameterization is based on reproducing quantum mechanical data of model compounds. Partial atomic charges are derived using the RESP electrostatic potential fitting method supplemented by the examination of methoxybenzene:water interactions. Dihedral parameters are optimized by fitting to critical rotational potentials and bonded parameters are obtained by optimizing vibrational frequencies and normal modes. Finally, the force field is validated by performing a molecular dynamics simulation of a crystal of a lignin fragment molecule and comparing simulation‐derived structural features with experimental results. Together with the existing force field for polysaccharides, this lignin force field will enable full simulations of lignocellulose. Β© 2008 Wiley Periodicals, Inc. J Comput Chem, 2009

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