First-Principles Parametrization of Polarizable Coarse-Grained Force Fields for Ionic Liquids

2018 ◽  
Vol 14 (3) ◽  
pp. 1471-1486 ◽  
Author(s):  
Frank Uhlig ◽  
Johannes Zeman ◽  
Jens Smiatek ◽  
Christian Holm
Keyword(s):  
Ionic Liquids ◽  
First Principles ◽  
Force Fields ◽  
Coarse Grained

scholarly journals Simulations of room temperature ionic liquids: from polarizable to coarse-grained force fields

2015 ◽  
Vol 17 (22) ◽  
pp. 14270-14279 ◽  
Author(s):  
Mathieu Salanne
Keyword(s):  
Ionic Liquids ◽  
Molecular Modelling ◽  
Room Temperature ◽  
Force Fields ◽  
Coarse Grained ◽  
Room Temperature Ionic Liquids ◽  
Recent Advances

This perspective article summarizes the recent advances in the classical molecular modelling of room temperature ionic liquids.

A Transferable, Polarisable Force Field for Ionic Liquids

2019 ◽  
Author(s):  
Kateryna Goloviznina ◽  
José N. Canongia Lopes ◽  
Margarida Costa Gomes ◽  
Agilio Padua
Keyword(s):  
Ionic Liquids ◽  
Force Field ◽  
Force Fields ◽  
Dipole Moments ◽  
Van Der Waals Interactions ◽  
First Principles Calculations ◽  
Ion Diffusion ◽  
Fixed Integer ◽  
Molecular Compounds ◽  
Induced Dipoles

A general, transferable polarisable force field for molecular simulation of ionic liquids and their mixtures with molecular compounds is developed. This polarisable model is derived from the widely used CL\&P fixed-charge force field that describes most families of ionic liquids, in a form compatible with OPLS-AA, one of the major force fields for organic compounds. Models for ionic liquids with fixed, integer ionic charges lead to pathologically slow dynamics, a problem that is corrected when polarisation effects are included explicitly. In the model proposed here, Drude induced dipoles are used with parameters determined from atomic polarisabilities. The CL\&P force field is modified upon inclusion of the Drude dipoles, to avoid double-counting of polarisation effects. This modification is based on first-principles calculations of the dispersion and induction contributions to the van der Waals interactions, using symmetry-adapted perturbation theory (SAPT) for a set of dimers composed of positive, negative and neutral fragments representative of a wide variety of ionic liquids. The fragment approach provides transferability, allowing the representation of a multitude of cation and anion families, including different functional groups, without need to re-parametrise. Because SAPT calculations are expensive an alternative predictive scheme was devised, requiring only molecular properties with a clear physical meaning, namely dipole moments and atomic polarisabilities. The new polarisable force field, CL\&Pol, describes a broad set set of ionic liquids and their mixtures with molecular compounds, and is validated by comparisons with experimental data on density, ion diffusion coefficients and viscosity. The approaches proposed here can also be applied to the conversion of other fixed-charged force fields into polarisable versions.<br>

scholarly journals First principles characterisation of bio–nano interface

2021 ◽  
Author(s):  
Ian Rouse ◽  
David Power ◽  
Erik G. Brandt ◽  
Matthew Schneemilch ◽  
Konstantinos Kotsis ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
First Principles ◽  
Computational Approach ◽  
Titania Nanoparticles ◽  
Coarse Grained ◽  
First Principles Study

We present a multiscale computational approach for the first-principles study of bio-nano interactions. Using titanium dioxide as a case study, we evaluate the affinity of titania nanoparticles to water and biomolecules through atomistic and coarse-grained techniques.

Transferability of coarse-grained force fields: The polymer case

2008 ◽  
Vol 128 (6) ◽  
pp. 064904 ◽  
Author(s):  
Paola Carbone ◽  
Hossein Ali Karimi Varzaneh ◽  
Xiaoyu Chen ◽  
Florian Müller-Plathe
Keyword(s):  
Force Fields ◽  
Coarse Grained

scholarly journals A new protein nucleic-acid coarse-grained force field based on the UNRES and NARES-2P force fields

2018 ◽  
Vol 39 (28) ◽  
pp. 2360-2370 ◽  
Author(s):  
Adam K. Sieradzan ◽  
Artur Giełdoń ◽  
Yanping Yin ◽  
Yi He ◽  
Harold A. Scheraga ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Force Field ◽  
Force Fields ◽  
Coarse Grained ◽  
Protein Nucleic Acid ◽  
New Protein
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