Despite great efforts over the past 50 years, the simulation of water still presents significant challenges and open questions. At room temperature and pressure, the collective molecular interactions and dynamics of water molecules may form local structural arrangements that are non-trivial to classify. Here, we employ a data-driven approach built on Smooth Overlap of Atomic Position (SOAP) that allows us to compare and classify how widely used classical models represent liquid water. Macroscopically, the obtained results are rationalized based on water thermodynamic observables. Microscopically, we directly observe how transient ice-like ordered environments may dynamically/statistically form in liquid water, even above freezing temperature, by comparing the SOAP spectra for different ice structures with those of the simulated liquid systems. This confirms recent ab initio-based calculations but also reveals how the emergence of ephemeral local ice-like environments in liquid water at room conditions can be captured by classical water models.
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7 June 2022
Research Article|
June 03 2022
Ephemeral ice-like local environments in classical rigid models of liquid water
Riccardo Capelli
;
Riccardo Capelli
a)
1
Department of Applied Science and Technology, Politecnico di Torino
, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
a)Author to whom correspondence should be addressed: riccardo.capelli@polito.it and giovanni.pavan@polito.it
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Francesco Muniz-Miranda
;
Francesco Muniz-Miranda
2
Department of Chemical and Geological Sciences, University of Modena and Reggio-Emilia
, Via Campi 103, I-41125 Modena, Italy
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Giovanni M. Pavan
Giovanni M. Pavan
a)
1
Department of Applied Science and Technology, Politecnico di Torino
, Corso Duca degli Abruzzi 24, I-10129 Torino, Italy
3
Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Polo Universitario Lugano, Campus Est
, Via la Santa 1, CH-6962 Lugano-Viganello, Switzerland
a)Author to whom correspondence should be addressed: riccardo.capelli@polito.it and giovanni.pavan@polito.it
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a)Author to whom correspondence should be addressed: riccardo.capelli@polito.it and giovanni.pavan@polito.it
J. Chem. Phys. 156, 214503 (2022)
Article history
Received:
February 18 2022
Accepted:
May 13 2022
Citation
Riccardo Capelli, Francesco Muniz-Miranda, Giovanni M. Pavan; Ephemeral ice-like local environments in classical rigid models of liquid water. J. Chem. Phys. 7 June 2022; 156 (21): 214503. https://doi.org/10.1063/5.0088599
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