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Mondal P, Cazade PA, Das AK, Bereau T, Meuwly M. Multipolar Force Fields for Amide-I Spectroscopy from Conformational Dynamics of the Alanine Trimer. J Phys Chem B 2021; 125:10928-10938. [PMID: 34559531 DOI: 10.1021/acs.jpcb.1c05423] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dynamics and spectroscopy of N-methyl-acetamide (NMA) and trialanine in solution are characterized from molecular dynamics simulations using different energy functions, including a conventional point charge (PC)-based force field, one based on a multipolar (MTP) representation of the electrostatics, and a semiempirical DFT method. For the 1D infrared spectra, the frequency splitting between the two amide-I groups is 10 cm-1 from the PC, 13 cm-1 from the MTP, and 47 cm-1 from self-consistent charge density functional tight-binding (SCC-DFTB) simulations, compared with 25 cm-1 from experiment. The frequency trajectory required for the frequency fluctuation correlation function (FFCF) is determined from individual normal mode (INM) and full normal mode (FNM) analyses of the amide-I vibrations. The spectroscopy, time-zero magnitude of the FFCF C(t = 0), and the static component Δ02 from simulations using MTP and analysis based on FNM are all consistent with experiments for (Ala)3. Contrary to this, for the analysis excluding mode-mode coupling (INM), the FFCF decays to zero too rapidly and for simulations with a PC-based force field, the Δ02 is too small by a factor of two compared with experiments. Simulations with SCC-DFTB agree better with experiment for these observables than those from PC-based simulations. The conformational ensemble sampled from simulations using PCs is consistent with the literature (including PII, β, αR, and αL), whereas that covered by the MTP-based simulations is dominated by PII with some contributions from β and αR. This agrees with and confirms recently reported Bayesian-refined populations based on 1D infrared experiments. FNM analysis together with a MTP representation provides a meaningful model to correctly describe the dynamics of hydrated trialanine.
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Affiliation(s)
- Padmabati Mondal
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland
| | - Pierre-André Cazade
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland
| | - Akshaya K Das
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland
| | - Tristan Bereau
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland
| | - Markus Meuwly
- Department of Chemistry, University of Basel, Klingelbergstrasse 80, Basel 4056, Switzerland.,Department of Chemistry, Brown University, Providence/RI 02912, United States
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Petrone A, Lingerfelt DB, Williams-Young DB, Li X. Ab Initio Transient Vibrational Spectral Analysis. J Phys Chem Lett 2016; 7:4501-4508. [PMID: 27788583 DOI: 10.1021/acs.jpclett.6b02292] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Pump probe spectroscopy techniques have enabled the direct observation of a variety of transient molecular species in both ground and excited electronic states. Time-resolved vibrational spectroscopy is becoming an indispensable tool for investigating photoinduced nuclear dynamics of chemical systems of all kinds. On the other hand, a complete picture of the chemical dynamics encoded in these spectra cannot be achieved without a full temporal description of the structural relaxation, including the explicit time-dependence of vibrational coordinates that are substantially displaced from equilibrium by electronic excitation. Here we present a transient vibrational analysis protocol combining ab initio direct molecular dynamics and time-integrated normal modes introduced in this work, relying on the recent development of analytic time-dependent density functional theory (TDDFT) second derivatives for excited states. Prototypical molecules will be used as test cases, showing the evolution of the vibrational signatures that follow electronic excitation. This protocol provides a direct route to assigning the vibrations implicated in the (photo)dynamics of several (photoactive) systems.
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Affiliation(s)
- Alessio Petrone
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - David B Lingerfelt
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - David B Williams-Young
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
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3
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Mielke SL, Truhlar DG. A whole-path importance-sampling scheme for Feynman path integral calculations of absolute partition functions and free energies. J Chem Phys 2016; 144:034110. [PMID: 26801023 DOI: 10.1063/1.4939869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Using Feynman path integrals, a molecular partition function can be written as a double integral with the inner integral involving all closed paths centered at a given molecular configuration, and the outer integral involving all possible molecular configurations. In previous work employing Monte Carlo methods to evaluate such partition functions, we presented schemes for importance sampling and stratification in the molecular configurations that constitute the path centroids, but we relied on free-particle paths for sampling the path integrals. At low temperatures, the path sampling is expensive because the paths can travel far from the centroid configuration. We now present a scheme for importance sampling of whole Feynman paths based on harmonic information from an instantaneous normal mode calculation at the centroid configuration, which we refer to as harmonically guided whole-path importance sampling (WPIS). We obtain paths conforming to our chosen importance function by rejection sampling from a distribution of free-particle paths. Sample calculations on CH4 demonstrate that at a temperature of 200 K, about 99.9% of the free-particle paths can be rejected without integration, and at 300 K, about 98% can be rejected. We also show that it is typically possible to reduce the overhead associated with the WPIS scheme by sampling the paths using a significantly lower-order path discretization than that which is needed to converge the partition function.
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Affiliation(s)
- Steven L Mielke
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, Minnesota 55455-0431, USA
| | - Donald G Truhlar
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, Minnesota 55455-0431, USA
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Schella A, Melzer A, July C, Bechinger C. Effect of confinement on the mode dynamics of dipole clusters. SOFT MATTER 2015; 11:1197-1207. [PMID: 25563898 DOI: 10.1039/c4sm02333a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Dynamical properties of colloidal clusters composed of paramagnetic beads are presented. The clusters were trapped either in a parabolic trough or in a hard-wall confinement. In order to access the dynamics of the ensembles, the instantaneous normal mode (INM) approach is utilized, which uses cluster configurations as an input. The peaks in the mode spectra weaken when the system size is increased and when the coupling strength is lowered. The short-time diffusive properties of the clusters are deduced using the INM technique. It is found that angular diffusion is always larger than radial diffusion regardless of the shape of the external trap. Further, short-time diffusion seems to be almost independent of the coupling strength in the solid regime, but decreases with increasing packing fraction and size of the ensembles. In general, it is found that diffusion is larger for parabolically confined than for hard-wall trapped clusters.
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Affiliation(s)
- André Schella
- Institute of Physics, Ernst-Moritz-Arndt-University Greifwald, Felix Hausdorff Str. 6, 17489 Greifswald, Germany.
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Mielke SL, Truhlar DG. Improved methods for Feynman path integral calculations and their application to calculate converged vibrational–rotational partition functions, free energies, enthalpies, entropies, and heat capacities for methane. J Chem Phys 2015; 142:044105. [PMID: 25637967 DOI: 10.1063/1.4905526] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Steven L. Mielke
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, Minnesota 55455-0431, USA
| | - Donald G. Truhlar
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant St. S.E., Minneapolis, Minnesota 55455-0431, USA
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6
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Asgari M, Behnejad H. Molecular dynamics simulation of the melting process in Ag27Cu13 core–shell nanoalloy. Chem Phys 2013. [DOI: 10.1016/j.chemphys.2013.06.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Mielke SL, Dinpajooh M, Siepmann JI, Truhlar DG. Efficient methods for including quantum effects in Monte Carlo calculations of large systems: Extension of the displaced points path integral method and other effective potential methods to calculate properties and distributions. J Chem Phys 2013; 138:014110. [PMID: 23298031 DOI: 10.1063/1.4772667] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Steven L Mielke
- Department of Chemistry, Chemical Theory Center, and Supercomputing Institute, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455-0431, USA.
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8
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Tang PH, Wu TM, Hsu PJ, Lai SK. Melting behavior of Ag14 cluster: An order parameter by instantaneous normal modes. J Chem Phys 2012; 137:244304. [DOI: 10.1063/1.4772096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Tang PH, Wu TM, Yen TW, Lai SK, Hsu PJ. Comparative study of cluster Ag17Cu2 by instantaneous normal mode analysis and by isothermal Brownian-type molecular dynamics simulation. J Chem Phys 2011; 135:094302. [DOI: 10.1063/1.3628669] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Determination of melting mechanism of Pd24Pt14 nanoalloy by multiple histogram method via molecular dynamics simulations. Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.07.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Calvo F, Parneix P. Phase space theory of evaporation in neon clusters: the role of quantum effects. J Phys Chem A 2010; 113:14352-63. [PMID: 20028160 DOI: 10.1021/jp903282b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Unimolecular evaporation of neon clusters containing between 14 and 148 atoms is theoretically investigated in the framework of phase space theory. Quantum effects are incorporated in the vibrational densities of states, which include both zero-point and anharmonic contributions, and in the possible tunneling through the centrifugal barrier. The evaporation rates, kinetic energy released, and product angular momentum are calculated as a function of excess energy or temperature in the parent cluster and compared to the classical results. Quantum fluctuations are found to generally increase both the kinetic energy released and the angular momentum of the product, but the effects on the rate constants depend nontrivially on the excess energy. These results are interpreted as due to the very few vibrational states available in the product cluster when described quantum mechanically. Because delocalization also leads to much narrower thermal energy distributions, the variations of evaporation observables as a function of canonical temperature appear much less marked than in the microcanonical ensemble. While quantum effects tend to smooth the caloric curve in the product cluster, the melting phase change clearly keeps a signature on these observables. The microcanonical temperature extracted from fitting the kinetic energy released distribution using an improved Arrhenius form further suggests a backbending in the quantum Ne(13) cluster that is absent in the classical system. Finally, in contrast to delocalization effects, quantum tunneling through the centrifugal barrier does not play any appreciable role on the evaporation kinetics of these rather heavy clusters.
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Affiliation(s)
- F Calvo
- LASIM, Université Claude Bernard Lyon 1 and CNRS UMR 5579, Bat. A. Kastler, 43 Bd du 11 novembre 1918, F69622 Villeurbanne, France
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Hsu D, Hsu M. Zwanzig-Mori projection operators and EEG dynamics: deriving a simple equation of motion. PMC BIOPHYSICS 2009; 2:6. [PMID: 19594920 PMCID: PMC2728514 DOI: 10.1186/1757-5036-2-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2009] [Accepted: 07/13/2009] [Indexed: 11/24/2022]
Abstract
We present a macroscopic theory of electroencephalogram (EEG) dynamics based on the laws of motion that govern atomic and molecular motion. The theory is an application of Zwanzig-Mori projection operators. The result is a simple equation of motion that has the form of a generalized Langevin equation (GLE), which requires knowledge only of macroscopic properties. The macroscopic properties can be extracted from experimental data by one of two possible variational principles. These variational principles are our principal contribution to the formalism. Potential applications are discussed, including applications to the theory of critical phenomena in the brain, Granger causality and Kalman filters. PACS code: 87.19.lj
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Affiliation(s)
- David Hsu
- Department of Neurology, University of Wisconsin, Madison WI, USA.
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Hsu PJ, Luo JS, Lai SK, Wax JF, Bretonnet JL. Melting scenario in metallic clusters. J Chem Phys 2008; 129:194302. [PMID: 19026055 DOI: 10.1063/1.3009194] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The isothermal Brownian-type molecular dynamics simulation has been applied to study the melting behavior of bimetallic clusters. It was found that the specific heat and Lindermann-like parameter customarily used in bulk system to describe solid-liquid transition show incongruity in the predicted melting temperature T(melt). The underlying mechanisms that lead to the incompatibility of T(melt) separately deduced from these two quantities were analyzed further. To gain insight into the melting behavior, we calculated in addition the velocity autocorrelation function and its Fourier transform, the power spectrum, and extracted from them the T(melt). It appears that the T(melt) inferred from the latter quantities is closer to that deduced from the principal peak position of specific heat. Two bimetallic clusters, namely, Ag(1)Cu(13) and Au(1)Cu(13), were selected for a thorough investigation. In the context of cluster morphology, we scrutinized the atomic distributions of Ag(1)Cu(13), Au(1)Cu(13), and Cu(14) and effected a comparative study between a bimetallic cluster and a pure cluster so as to learn from comparison the differences in the thermal reaction of atoms, in particular, the impurity atom in the bimetallic cluster. On analyzing the dynamical data, we observed at a lower temperature (T<<T(melt)) migrational relocation of atoms whose dynamics was superimposed at an intermediate temperature (T<T(melt)) by permutations between atoms, and at a higher temperature (T approximately T(melt)), liquidlike or even gaslike behavior.
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Affiliation(s)
- P J Hsu
- Complex Liquids Laboratory, Department of Physics, National Central University, Chungli 320, Taiwan
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15
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16
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Krishnan SH, Ayappa KG. Relaxation and Short Time Dynamics of Bulk Liquids and Fluids Confined in Spherical Cavities and Slit Pores. J Phys Chem B 2005; 109:23237-49. [PMID: 16375288 DOI: 10.1021/jp054402a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The density of states for bulk and confined fluids have been modeled using a recently proposed gamma distribution (Krishnan, S. H.; Ayappa, K. G. J. Chem. Phys. 2004, 121, 3197). The gamma distribution results in a closed form analytical expression for the velocity autocorrelation function and the relaxation time of the fluid. The two parameters of the gamma distribution are related analytically to the second and fourth frequency moments of the fluid using short time expansions. The predictions by the proposed gamma model are compared with the velocity autocorrelation functions obtained using the theory of instantaneous normal modes (INMs) and from molecular dynamics simulations. The model is applied to a bulk soft sphere liquid and fluids confined in a spherical cavity and slit-shaped pores. The gamma model is able to capture the resulting changes in relaxation time due to changes in density and temperature extremely well for both the bulk liquid and confined inhomogeneous fluid situations. In all cases, the predictions by the gamma model are superior to those obtained from the INM theory. In the case of the fluid confined in a slit pore, the loadings were obtained from a grand canonical Monte Carlo simulation where the pore is equilibrated with a bulk fluid. This is similar to a confinement situation in a surface force apparatus. The predicted relaxation times vs pore widths from the gamma model are seen to accurately capture the oscillations due to formation and disruption of layers within the slit pore.
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Affiliation(s)
- S H Krishnan
- Department of Chemical Engineering, Indian Institute of Science, Bangalore-India 560012
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17
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Paci I, Szleifer I, Ratner MA. Structural Behavior and Self-Assembly of Lennard-Jones Clusters on Rigid Surfaces. J Phys Chem B 2005; 109:12935-45. [PMID: 16852606 DOI: 10.1021/jp0507849] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The phase behavior and surface pattern formation for intermediate size Lennard-Jones clusters on rigid surfaces are examined. We use a parallel tempering Monte Carlo algorithm, in the canonical ensemble. Tempering is done over the temperature domain in most of the calculations. A two-dimensional temperature and Hamiltonian tempering algorithm is also implemented, to examine its usefulness in investigating this type of problem. In general, we observe gas phase systems as they undergo a condensation transition on the surface, followed by a freezing transition. The final solid state pattern formed by the cluster on the surface is the result of a number of competing effects. First, there is a competition between attraction within the cluster and that between cluster and surface atoms. Second, a monolayer of Lennard-Jones atoms tends to pack in a hexadic geometry. This geometry is frustrated on a surface with a different symmetry. The molecular organization of the substrate has a serious impact on the cluster packing. The surface morphology and the size mismatch between cluster and surface atoms, along with the relative interaction strengths, determine which of the effects prevail. When the surface atoms are small enough, the interactions within the cluster determine the symmetry of the pattern. In such a case, the substrate behaves similarly to a continuous surface, and the low-temperature pattern is a hexadic monolayer. When the sizes of the surface and cluster atoms are comparable, the low-temperature adsorbed geometry mimics the substrate symmetry. On a face-centered cubic surface, face-centered cubic monolayers or droplets are obtained.
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Affiliation(s)
- Irina Paci
- Department of Chemistry and Materials Research Center, Northwestern University, Evanston, Illinois 60208, USA.
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18
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Boinovich LB, Emelyanenko AM. Forces due to dynamic structure in thin liquid films. Adv Colloid Interface Sci 2002; 96:37-58. [PMID: 11908795 DOI: 10.1016/s0001-8686(01)00074-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The long-range surface forces arising due to dynamic structure in thin liquid films are considered. The phonon formalism is applied to analyse the contribution of the collective motions in liquid to the excess free energy and the disjoining pressure of the film. It is shown that both the intermolecular interactions and the interactions between liquid and confining phases essentially have an influence on the sign and the magnitude of the phonon component of disjoining pressure and its temperature dependence. The methods and procedures used to assess the density of vibrational states for real and model liquids are discussed. The description of several spectroscopic experimental methodics specific for investigation of thin liquid interlayers is given concurrently with experimental data revealing the dynamic structuring in the course of film thinning.
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Affiliation(s)
- L B Boinovich
- Institute of Physical Chemistry, Russian Academy of Sciences, Moscow.
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19
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Jang S, Pak Y, Shin S. Multicanonical ensemble with Nosé–Hoover molecular dynamics simulation. J Chem Phys 2002. [DOI: 10.1063/1.1453398] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Frantz DD. Magic number behavior for heat capacities of medium-sized classical Lennard-Jones clusters. J Chem Phys 2001. [DOI: 10.1063/1.1397329] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Malakhovskii A. Ejection of cluster ions as a result of electron impact ionization of argon clusters. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00419-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Mielke SL, Truhlar DG. Displaced-points path integral method for including quantum effects in the Monte Carlo evaluation of free energies. J Chem Phys 2001. [DOI: 10.1063/1.1378043] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Li WX, Keyes T. Instantaneous normal mode theory of diffusion and the potential energy landscape: Application to supercooled liquid CS2. J Chem Phys 1999. [DOI: 10.1063/1.479810] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Li WX, Keyes T, Murry RL, Fourkas JT. Non-Cartesian coordinates for instantaneous normal mode theory of atomic liquids. J Chem Phys 1998. [DOI: 10.1063/1.477465] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Easter DC, Bailey L, Mellot J, Tirres M, Weiss T. Structure and dynamics of intermediate benzene–argon clusters: (C6H6)Arn, n=13–40. J Chem Phys 1998. [DOI: 10.1063/1.476023] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Affiliation(s)
- Mario Re
- Unidad de Actividad Química, Comisión Nacional de Energía Atómica, Avenida del Libertador 8250, 1429 Capital Federal, Argentina, and INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Capital Federal, Argentina
| | - Daniel Laria
- Unidad de Actividad Química, Comisión Nacional de Energía Atómica, Avenida del Libertador 8250, 1429 Capital Federal, Argentina, and INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 1428 Capital Federal, Argentina
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29
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Li WX, Keyes T. Pure translation instantaneous normal modes: Imaginary frequency contributions vanish at the glass transition in CS2. J Chem Phys 1997. [DOI: 10.1063/1.474968] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Gezelter JD, Rabani E, Berne BJ. Can imaginary instantaneous normal mode frequencies predict barriers to self-diffusion? J Chem Phys 1997. [DOI: 10.1063/1.474822] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Chitra R, Yashonath S. Effect of confinement in the α-cages of zeolite NaCaA on the properties of Ar13 cluster: A Monte Carlo study. J CHEM SCI 1997. [DOI: 10.1007/bf02883489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Affiliation(s)
- T. Keyes
- Department of Chemistry, Boston University, Boston, Massachusetts 02215
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Chitra R, Yashonath S. Inverse Surface Melting in Confined Clusters: Ar13 in Zeolite L. J Phys Chem B 1997. [DOI: 10.1021/jp961872j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- R. Chitra
- Solid State and Structural Chemistry Unit and Supercomputer Education and Research Centre, Indian Institute of Science, Bangalore 560012, India
| | - S. Yashonath
- Solid State and Structural Chemistry Unit and Supercomputer Education and Research Centre, Indian Institute of Science, Bangalore 560012, India
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Adams JE, Stratt RM. Solvation and melting in large benzene⋅(Ar)nclusters: Electronic spectral shifts and linewidths. J Chem Phys 1996. [DOI: 10.1063/1.472049] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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36
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Ladanyi BM, Klein S. Contributions of rotation and translation to polarizability anisotropy and solvation dynamics in acetonitrile. J Chem Phys 1996. [DOI: 10.1063/1.472016] [Citation(s) in RCA: 95] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Peslherbe GH, Hase WL. Comparison of zero‐point energy constrained and quantum anharmonic Rice–Ramsperger–Kassel–Marcus and phase space theory rate constants for Al3dissociation. J Chem Phys 1996. [DOI: 10.1063/1.471704] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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38
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Schvaneveldt SJ, Loring RF. Static and dynamic vibrational dephasing in a dense fluid. J Chem Phys 1996. [DOI: 10.1063/1.471167] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Gershinsky G, Pollak E. Variational transition state theory: Application to a symmetric exchange reaction in water. J Chem Phys 1995. [DOI: 10.1063/1.470160] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Moore P, Keyes T. Normal mode analysis of liquid CS2: Velocity correlation functions and self‐diffusion constants. J Chem Phys 1994. [DOI: 10.1063/1.467031] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wan Y, Stratt RM. Liquid theory for the instantaneous normal modes of a liquid. J Chem Phys 1994. [DOI: 10.1063/1.467178] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tang S, Evans GT. Harmonic modes in a hard sphere fluid. PHYSICAL REVIEW LETTERS 1994; 72:1666-1669. [PMID: 10055670 DOI: 10.1103/physrevlett.72.1666] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Kunz RE, Berry RS. Multiple phase coexistence in finite systems. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1994; 49:1895-1908. [PMID: 9961430 DOI: 10.1103/physreve.49.1895] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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