Imperial College London
Professor Pantelides

Professor Pantelides

Faculty of Engineering, Department of Chemical Engineering

Professor
 
 
 
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Contact

 

+44 (0)20 7594 5622c.pantelides

 
 
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Location

 

C401Roderic Hill BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sugden:2016:10.1107/S2052520616015122,
author = {Sugden, IJ and Adjiman, CSA and Pantelides, C},
doi = {10.1107/S2052520616015122},
journal = {Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials},
pages = {864--874},
title = {Accurate and efficient representation of intramolecular energy in ab initio generation of crystal structures. I. Adaptive local approximate models},
url = {http://dx.doi.org/10.1107/S2052520616015122},
volume = {72},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The global search stage of Crystal Structure Prediction (CSP) methods requires a fine balance between accuracy and computational cost, particularly for the study of large flexible molecules. A major improvement in the accuracy and cost of the intramolecular energy function used in the CrystalPredictor II (Habgood, M., Sugden, I. J., Kazantsev, A. V., Adjiman, C. S. & Pantelides, C. C. (2015). J Chem Theory Comput 11, 1957-1969) program is presented, where the most efficient use of computational effort is ensured via the use of adaptive Local Approximate Model (LAM) placement. The entire search space of relevant molecule’s conformations is initially evaluated using a coarse, low accuracy grid. Additional LAM points are then placed at appropriate points determined via an automated process, aiming to minimise the computational effort expended in high energy regions whilst maximising the accuracy in low energy regions. As the size, complexity, and flexibility of molecules increase, the reduction in computational cost becomes marked. This improvement is illustrated with energy calculations for benzoic acid and the ROY molecule, and a CSP study of molecule XXVI from the sixth blind test (Reilly et al., (2016). Acta Cryst. B, 72, 439-459), which is challenging due to its size and flexibility. Its known experimental form is successfully predicted as the global minimum. The computational cost of the study is tractable without the need to make unphysical simplifying assumptions.
AU  - Sugden,IJ
AU  - Adjiman,CSA
AU  - Pantelides,C
DO  - 10.1107/S2052520616015122
EP  - 874
PY  - 2016///
SN  - 2052-5206
SP  - 864
TI  - Accurate and efficient representation of intramolecular energy in ab initio generation of crystal structures. I. Adaptive local approximate models
T2  - Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials
UR  - http://dx.doi.org/10.1107/S2052520616015122
UR  - https://journals.iucr.org/b/issues/2016/06/00/wf5128/index.html
UR  - http://hdl.handle.net/10044/1/41195
VL  - 72
ER  -
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