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Marracino P, Liberti M, d'Inzeo G, Apollonio F. Water response to intense electric fields: A molecular dynamics study. Bioelectromagnetics 2015; 36:377-85. [PMID: 25877041 DOI: 10.1002/bem.21916] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Accepted: 03/11/2015] [Indexed: 02/04/2023]
Abstract
This paper investigated polarization properties of water molecules in close proximity to an ionic charge in the presence of external electric fields by using an approach based on simulations at the atomic level. We chose sodium and chloride ions in water as examples of dilute ionic solutions and used molecular dynamics simulations to systematically investigate the influence of an external static electric field on structural, dipolar, and polarization properties of water near charged ions. Results showed that a threshold electric field higher than 10(8) V/m is needed to affect water polarization and increase mean dipole moment of water molecules close to the ion. A similar threshold holds for water permittivity profiles, although a field 10× higher is needed to ensure that water permittivity is almost constant independently of the position close to the ion. Electric fields of such intensities can greatly enhance polarizability of water in hydration shells around ions.
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Affiliation(s)
- Paolo Marracino
- Department of Information Engineering, Electronics and Telecommunications (DIET), Italian Inter-University Center of Electromagnetic Fields and Biosystems (ICEmB), "La Sapienza" University of Rome, Italy
| | - Micaela Liberti
- Department of Information Engineering, Electronics and Telecommunications (DIET), Italian Inter-University Center of Electromagnetic Fields and Biosystems (ICEmB), "La Sapienza" University of Rome, Italy
| | - Guglielmo d'Inzeo
- Department of Information Engineering, Electronics and Telecommunications (DIET), Italian Inter-University Center of Electromagnetic Fields and Biosystems (ICEmB), "La Sapienza" University of Rome, Italy
| | - Francesca Apollonio
- Department of Information Engineering, Electronics and Telecommunications (DIET), Italian Inter-University Center of Electromagnetic Fields and Biosystems (ICEmB), "La Sapienza" University of Rome, Italy
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Noé F, Daidone I, Smith JC, di Nola A, Amadei A. Solvent Electrostriction-Driven Peptide Folding Revealed by Quasi-Gaussian Entropy Theory and Molecular Dynamics Simulation. J Phys Chem B 2008; 112:11155-63. [DOI: 10.1021/jp801391t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Frank Noé
- DFG Research Center Matheon, Free University of Berlin, Arnimallee 6, 14159 Berlin, Germany, Interdisciplinary Center for Scientific Computing, University of Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany, Center for Molecular Biophysics, University of Tennessee/Oak Ridge National Laboratory, One Bethel Valley Road, P.O. Box 2008, Oak Ridge, Tennessee 37831-6255, Department of Chemistry, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy, and Department of Chemical
| | - Isabella Daidone
- DFG Research Center Matheon, Free University of Berlin, Arnimallee 6, 14159 Berlin, Germany, Interdisciplinary Center for Scientific Computing, University of Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany, Center for Molecular Biophysics, University of Tennessee/Oak Ridge National Laboratory, One Bethel Valley Road, P.O. Box 2008, Oak Ridge, Tennessee 37831-6255, Department of Chemistry, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy, and Department of Chemical
| | - Jeremy C. Smith
- DFG Research Center Matheon, Free University of Berlin, Arnimallee 6, 14159 Berlin, Germany, Interdisciplinary Center for Scientific Computing, University of Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany, Center for Molecular Biophysics, University of Tennessee/Oak Ridge National Laboratory, One Bethel Valley Road, P.O. Box 2008, Oak Ridge, Tennessee 37831-6255, Department of Chemistry, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy, and Department of Chemical
| | - Alfredo di Nola
- DFG Research Center Matheon, Free University of Berlin, Arnimallee 6, 14159 Berlin, Germany, Interdisciplinary Center for Scientific Computing, University of Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany, Center for Molecular Biophysics, University of Tennessee/Oak Ridge National Laboratory, One Bethel Valley Road, P.O. Box 2008, Oak Ridge, Tennessee 37831-6255, Department of Chemistry, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy, and Department of Chemical
| | - Andrea Amadei
- DFG Research Center Matheon, Free University of Berlin, Arnimallee 6, 14159 Berlin, Germany, Interdisciplinary Center for Scientific Computing, University of Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany, Center for Molecular Biophysics, University of Tennessee/Oak Ridge National Laboratory, One Bethel Valley Road, P.O. Box 2008, Oak Ridge, Tennessee 37831-6255, Department of Chemistry, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy, and Department of Chemical
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D'Alessandro M, Marinelli F, D'Abramo M, Aschi M, Di Nola A, Amadei A. Ground and excited electronic state thermodynamics of aqueous carbon monoxide: a theoretical study. J Chem Phys 2005; 122:124507. [PMID: 15836397 DOI: 10.1063/1.1870832] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
By using the quasi Gaussian entropy theory in combination with molecular dynamics simulations and the perturbed matrix method, we investigate the ground and excited state thermodynamics of aqueous carbon monoxide. Results show that the model used is rather accurate and provides a great detail in the description of the excitation thermodynamics.
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Affiliation(s)
- Maira D'Alessandro
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica 1, 00133 Roma, Italy
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