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Chen Z, Nie H, Benmore CJ, Smith PA, Du Y, Byrn S, Templeton AC, Su Y. Probing Molecular Packing of Amorphous Pharmaceutical Solids Using X-ray Atomic Pair Distribution Function and Solid-State NMR. Mol Pharm 2023; 20:5763-5777. [PMID: 37800667 DOI: 10.1021/acs.molpharmaceut.3c00628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
The structural investigation of amorphous pharmaceuticals is of paramount importance in comprehending their physicochemical stability. However, it has remained a relatively underexplored realm primarily due to the limited availability of high-resolution analytical tools. In this study, we utilized the combined power of X-ray pair distribution functions (PDFs) and solid-state nuclear magnetic resonance (ssNMR) techniques to probe the molecular packing of amorphous posaconazole and its amorphous solid dispersion at the molecular level. Leveraging synchrotron X-ray PDF data and employing the empirical potential structure refinement (EPSR) methodology, we unraveled the existence of a rigid conformation and discerned short-range intermolecular C-F contacts within amorphous posaconazole. Encouragingly, our ssNMR 19F-13C distance measurements offered corroborative evidence supporting these findings. Furthermore, employing principal component analysis on the X-ray PDF and ssNMR data sets enabled us to gain invaluable insights into the chemical nature of the intermolecular interactions governing the drug-polymer interplay. These outcomes not only furnish crucial structural insights facilitating the comprehension of the underlying mechanisms governing the physicochemical stability but also underscore the efficacy of synergistically harnessing X-ray PDF and ssNMR techniques, complemented by robust modeling strategies, to achieve a high-resolution exploration of amorphous structures.
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Affiliation(s)
- Zhenxuan Chen
- Analytical Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Haichen Nie
- Center for Materials Science and Engineering, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
- Pharmaceutical Sciences and Clinical Supply, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Chris J Benmore
- X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Pamela A Smith
- Improved Pharma, West Lafayette, Indiana 47906, United States
| | - Yong Du
- Analytical Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
| | - Stephen Byrn
- Improved Pharma, West Lafayette, Indiana 47906, United States
- Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Allen C Templeton
- Pharmaceutical Sciences and Clinical Supply, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
| | - Yongchao Su
- Analytical Research and Development, Merck & Co., Inc., Rahway, New Jersey 07065, United States
- Pharmaceutical Sciences and Clinical Supply, Merck & Co., Inc., West Point, Pennsylvania 19486, United States
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2
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Chen Z, Huang C, Yao X, Benmore CJ, Yu L. Structures of glass-forming liquids by x-ray scattering: Glycerol, xylitol, and D-sorbitol. J Chem Phys 2021; 155:244508. [PMID: 34972382 DOI: 10.1063/5.0073986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Synchrotron x-ray scattering has been used to investigate three liquid polyalcohols of different sizes (glycerol, xylitol, and D-sorbitol) from above the glass transition temperatures Tg to below. We focus on two structural orders: the association of the polar OH groups by hydrogen bonds (HBs) and the packing of the non-polar hydrocarbon groups. We find that the two structural orders evolve very differently, reflecting the different natures of bonding. Upon cooling from 400 K, the O⋯O correlation at 2.8 Å increases significantly in all three systems, indicating more HBs, until kinetic arrests at Tg; the increase is well described by an equilibrium between bonded and non-bonded OH with ΔH = 9.1 kJ/mol and ΔS = 13.4 J/mol/K. When heated above Tg, glycerol loses the fewest HBs per OH for a given temperature rise scaled by Tg, followed by xylitol and by D-sorbitol, in the same order the number of OH groups per molecule increases (3, 5, and 6). The pair correlation functions of all three liquids show exponentially damped density modulations of wavelength 4.5 Å, which are associated with the main scattering peak and with the intermolecular C⋯C correlation. In this respect, glycerol is the most ordered with the most persistent density ripples, followed by D-sorbitol and by xylitol. Heating above Tg causes faster damping of the density ripples with the rate of change being the slowest in xylitol, followed by glycerol and by D-sorbitol. Given the different dynamic fragility of the three liquids (glycerol being the strongest and D-sorbitol being the most fragile), we relate our results to the current theories of the structural origin for the difference. We find that the fragility difference is better understood on the basis of the thermal stability of HB clusters than that of the structure associated with the main scattering peak.
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Affiliation(s)
- Zhenxuan Chen
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA
| | - Chengbin Huang
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA
| | - Xin Yao
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA
| | - Chris J Benmore
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Lian Yu
- School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA
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3
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Shi B. The strengths of van der Waals and electrostatic forces in 1-alkyl-3-methylimidazolium ionic liquids obtained through Lifshitz theory and Coulomb formula. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Ngai KL, Wojnarowska Z, Paluch M. The structural α-relaxation times of prilocaine confined in 1 nm pores of molecular sieves: quantitative explanation by the coupling model. Phys Chem Chem Phys 2020; 22:9257-9261. [PMID: 32307500 DOI: 10.1039/d0cp00282h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The molecular glass-former and pharmaceutical, prilocaine, distinguishes itself by exhibiting seven general and fundamental dynamic and thermodynamic properties [Z. Wojnarowska, et al., J. Phys. Chem. B, 2015, 39, 12699.], all of which have been explained using the coupling model. What has not been studied before are the changes in properties of the structural α-relaxation of prilocaine when subjected to extreme nano-confinement in spaces with a size of about 1 nm. Recently, Ruis et al. [G. N. Ruiz, et al., Phys. Chem. Chem. Phys., 2019, 21, 15576.] measured the α-relaxation times, τα,conf(T), of prilocaine confined in 1 nm pores of molecular sieves. They found that τα,conf(T) are significantly reduced from those of bulk prilocaine, τα,bulk(T), and assume a weaker temperature dependence. The data in toto pose a challenge for any theory of glass transition to explain quantitatively. The coupling model (CM) was applied to this problem to predict the α-relaxation times of prilocaine when cooperativity is removed, which is expected because only a few prilocaine molecules can fit into the 1 nm pores. The results from the CM are in quantitative agreement with the experimental values of τα,conf(T) and the temperature dependence. The success is nontrivial because no other extant theory can do the same to the best of our knowledge.
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Affiliation(s)
- K L Ngai
- CNR-IPCF, Dipartimento di Fisica, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy.
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5
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Garg G, Foltran S, Favier I, Pla D, Medina-González Y, Gómez M. Palladium nanoparticles stabilized by novel choline-based ionic liquids in glycerol applied in hydrogenation reactions. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.01.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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6
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Connection between dielectric constant and total number of hydrogen-bond groups per cation–anion pair in ionic liquids. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112216] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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7
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Ngai KL, Lunkenheimer P, Loidl A. Predicting the α-relaxation time of glycerol confined in 1.16 nm pores of zeolitic imidazolate frameworks. Phys Chem Chem Phys 2020; 22:507-511. [PMID: 31825416 DOI: 10.1039/c9cp05270d] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Uhl et al. [J. Chem. Phys., 2019, 150, 024504] studied the molecular dynamics of glycerol confined in a microporous zeolitic imidazolate framework (ZIF-8) with well-defined pore diameters of 1.16 nm by broadband dielectric spectroscopy. Of interest is a fast process in the central part of the pores identified as the α-relaxation of the confined supercooled glycerol with relaxation times τα,conf(T) reduced from τα,bulk(T) of bulk glycerol and having a temperature dependence different from the super-Arrhenius temperature of the latter. The focus of Uhl et al. was relating the confined molecular dynamics to the cooperativity length scales Lcorr(T) of molecular motion above the glass transition, and deducing the limiting high-temperature value of the correlation length of about 1.22 nm. Not yet considered by anyone are the observed values of τα,conf(T) and temperature dependence. Since the cooperativity length scales Lcorr(T) were found to be larger than the pore size of ZIF-8 over the temperature range studied and the density of the glycerol in the pore is possibly lower than the bulk, the cooperativity of the α-relaxation of glycerol confined in ZIF-8 is drastically reduced. Thus, within the framework of the Coupling Model (CM), τα,conf(T) should be nearly the same as the primitive relaxation time τ0(T) for glycerol when devoid of intermolecular coupling and cooperativity. Consistent with the absence of cooperativity of the glycerol confined in ZIF-8, we find the calculated τα,conf(T) are either the same or slightly longer than the calculated values of τ0(T). The quantitative prediction of the CM is verified. At this time we know of no other theory that can make such a quantitative prediction.
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Affiliation(s)
- K L Ngai
- CNR-IPCF, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy.
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8
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Jadżyn J, Świergiel J. Molecular understanding of the viscosity variety within self-assembled hydroxyl liquids. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Gitis M. On the interpretation of shear viscosity ultrasonic measurements. ULTRASONICS 2019; 93:1-6. [PMID: 30384005 DOI: 10.1016/j.ultras.2018.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 10/07/2018] [Accepted: 10/09/2018] [Indexed: 06/08/2023]
Abstract
This article discusses the possibility of using the measurements of ultrasonic wave parameters to estimate numerical values of shear and bulk viscosities on-line. It is noted that to increase the reliability of such estimates, it is necessary to introduce classification criteria for liquids. The on-line classification of liquids can be carried out through the measurement and comparison of the real and imaginary parts of liquid acoustic shear impedances. When the measured real and imaginary parts of the impedance are equal, the calculated ultrasonic viscosity values do not differ from the shear viscosity measured by a capillary viscometer. This occurs in liquids with a shear viscosities of less than 0.015 … 0.02 Pa ∗ s (i.e., low-viscous liquids). If the real and imaginary components of the liquid shear impedance are not equal, however, the proportionality coefficient between the viscous tensor and the shear strain rate becomes a complex number, and the calculated shear viscosity values are significantly different from values obtained by the capillary viscometer. This holds true in viscous liquids. The interpretation of the results in viscous non-polymeric liquids is considered in detail within the framework of the Maxwell model, and also within the framework of a proposed shear viscosity relaxation model. The influence of the relaxation process on the measured values of ultrasonic shear viscosity is considered. As an example, the model takes into account the presence of small molecular clusters in viscous liquids. The propagating viscous wave breaks the equilibrium distribution of the clusters, which in turn causes the relaxation process. It is shown that the shear viscosity of such liquids calculated from the ultrasonic data becomes a complex quantity depending on the frequency. A scheme for bulk viscosity measurements in the on-line mode is proposed. To find numerical values of the bulk viscosity, it is necessary to measure the real and imaginary components of the liquid shear impedance and the absorption coefficient of the longitudinal waves (if the thermal conductivity contribution can otherwise be neglected). Then the Stokes sound absorption coefficient and, accordingly, the numerical value of the bulk viscosity coefficient can be calculated.
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10
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Gromnitskaya EL, Danilov IV, Lyapin AG, Brazhkin VV. Elastic properties of liquid and glassy propane-based alcohols under high pressure: the increasing role of hydrogen bonds in a homologous family. Phys Chem Chem Phys 2019; 21:2665-2672. [PMID: 30657511 DOI: 10.1039/c8cp07588c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have measured the elastic moduli of liquid and glassy n-propanol and propylene glycol (PG) under pressure by ultrasonic techniques and have recalculated similar characteristics for glycerol from the previous experiment. All three substances form a ternary homologous family with the common formula C3H8-n(OH)n (n = 1, 2, 3), where the number of hydrogen bonds per molecule increases with the number of oxygen atoms approximately as ≈2n. In turn, the enhancement of hydrogen bonding results in an increase in elastic moduli (bulk modulus for liquids or bulk and shear moduli for glasses) from n-propanol to glycerol at all pressures, while the volume per molecule Vm shows the opposite trend at atmospheric pressure in spite of an increase in the molecular size. Nevertheless, the ratios between the Vm values at pressure P > 0.05 GPa are inverted in liquids and tend to the ratios of molecule volumes which indicates a decrease of the relative contribution of hydrogen bonds to the repulsive intermolecular forces with increasing pressure regardless of increase or decrease in the number of hydrogen bonds and their strength. A similar volume behavior is observed for glasses at T = 77 K. We have also established that the relative difference between corresponding moduli of liquid or glassy n-propanol and PG is remarkably less than that between corresponding values for PG and glycerol. We explain this property by the formation of a three-dimensional network of hydrogen bonds in glycerol, where the number of hydrogen bonds per molecule is close to six.
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Affiliation(s)
- E L Gromnitskaya
- Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, 108840, Russia.
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11
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Uhl M, Fischer JKH, Sippel P, Bunzen H, Lunkenheimer P, Volkmer D, Loidl A. Glycerol confined in zeolitic imidazolate frameworks: The temperature-dependent cooperativity length scale of glassy freezing. J Chem Phys 2019; 150:024504. [DOI: 10.1063/1.5080334] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M. Uhl
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - J. K. H. Fischer
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - P. Sippel
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - H. Bunzen
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
| | - P. Lunkenheimer
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - D. Volkmer
- Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany
| | - A. Loidl
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
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12
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Baumler SM, Mutchler JM, Blanchard GJ. Comparing Rotational and Translational Diffusion to Evaluate Heterogeneity in Binary Solvent Systems. J Phys Chem B 2018; 123:216-224. [DOI: 10.1021/acs.jpcb.8b09181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Stephen M. Baumler
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
| | - Jillian M. Mutchler
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
| | - G. J. Blanchard
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
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13
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Novel supramolecular organogel based on β-cyclodextrin as a green drug carrier for enhancing anticancer effects. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.11.154] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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14
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Electroanalytical Assessment of the Function of Nickel in Alkaline Electrocatalysis of Glycerol. Electrocatalysis (N Y) 2017. [DOI: 10.1007/s12678-017-0421-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Moghaddam MB, Goharshadi EK, Moosavi F. Structural and transport properties and solubility parameter of graphene/glycerol nanofluids: A molecular dynamics simulation study. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.07.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Glycerol revisited molecular dynamic simulations of structural, dynamical, and thermodynamic properties. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2016. [DOI: 10.1007/s13738-016-0952-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Andersson O, Johari GP. Thermal conductivity of Glycerol's liquid, glass, and crystal states, glass-liquid-glass transition, and crystallization at high pressures. J Chem Phys 2016; 144:064504. [PMID: 26874494 DOI: 10.1063/1.4941335] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
To investigate the effects of local density fluctuations on phonon propagation in a hydrogen bonded structure, we studied the thermal conductivity κ of the crystal, liquid, and glassy states of pure glycerol as a function of the temperature, T, and the pressure, p. We find that the following: (i) κcrystal is 3.6-times the κliquid value at 140 K at 0.1 MPa and 2.2-times at 290 K, and it varies with T according to 138 × T(-0.95); (ii) the ratio κliquid (p)/κliquid (0.1 MPa) is 1.45 GPa(-1) at 280 K, which, unexpectedly, is about the same as κcrystal (p)/κcrystal (0.1 MPa) of 1.42 GPa(-1) at 298 K; (iii) κglass is relatively insensitive to T but sensitive to the applied p (1.38 GPa(-1) at 150 K); (iv) κglass-T plots show an enhanced, pressure-dependent peak-like feature, which is due to the glass to liquid transition on heating; (v) continuous heating cold-crystallizes ultraviscous glycerol under pressure, at a higher T when p is high; and (vi) glycerol formed by cooling at a high p and then measured at a low p has a significantly higher κ than the glass formed by cooling at a low p. On heating at a fixed low p, its κ decreases before its glass-liquid transition range at that p is reached. We attribute this effect to thermally assisted loss of the configurational and vibrational instabilities of a glass formed at high p and recovered at low p, which is different from the usual glass-aging effect. While the heat capacity, entropy, and volume of glycerol crystal are less than those for its glass and liquid, κcrystal of glycerol, like its elastic modulus and refractive index, is higher. We discuss these findings in terms of the role of fluctuations in local density and structure, and the relations between κ and the thermodynamic quantities.
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Affiliation(s)
- Ove Andersson
- Department of Physics, Umeå University, 901 87 Umeå, Sweden
| | - G P Johari
- Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada
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18
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Towey JJ, Soper AK, Dougan L. Low-Density Water Structure Observed in a Nanosegregated Cryoprotectant Solution at Low Temperatures from 285 to 238 K. J Phys Chem B 2016; 120:4439-48. [DOI: 10.1021/acs.jpcb.6b01185] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. J. Towey
- Faculty
of Engineering, University of Nottingham, Nottingham NG7 2NR, U.K
| | - A. K. Soper
- ISIS
Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 OQX, U.K
| | - L. Dougan
- School
of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, U.K
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Akinkunmi FO, Jahn DA, Giovambattista N. Effects of Temperature on the Thermodynamic and Dynamical Properties of Glycerol–Water Mixtures: A Computer Simulation Study of Three Different Force Fields. J Phys Chem B 2015; 119:6250-61. [DOI: 10.1021/acs.jpcb.5b00439] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Frederick O. Akinkunmi
- Department of Physics, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States
| | - David A. Jahn
- Department of Physics, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States
| | - Nicolas Giovambattista
- Department of Physics, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States
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20
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Jahn DA, Akinkunmi FO, Giovambattista N. Effects of Temperature on the Properties of Glycerol: A Computer Simulation Study of Five Different Force Fields. J Phys Chem B 2014; 118:11284-94. [DOI: 10.1021/jp5059098] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- David A. Jahn
- Department of Physics, Brooklyn College of the City University of New York, 2900 Bedford Avenue, Brooklyn, New York 11210, United States
| | - Frederick O. Akinkunmi
- Department of Physics, Brooklyn College of the City University of New York, 2900 Bedford Avenue, Brooklyn, New York 11210, United States
| | - Nicolas Giovambattista
- Department of Physics, Brooklyn College of the City University of New York, 2900 Bedford Avenue, Brooklyn, New York 11210, United States
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21
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He X, Lopes PEM, MacKerell AD. Polarizable empirical force field for acyclic polyalcohols based on the classical Drude oscillator. Biopolymers 2013; 99:724-38. [PMID: 23703219 PMCID: PMC3902549 DOI: 10.1002/bip.22286] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 05/05/2013] [Indexed: 01/12/2023]
Abstract
A polarizable empirical force field for acyclic polyalcohols based on the classical Drude oscillator is presented. The model is optimized with an emphasis on the transferability of the developed parameters among molecules of different sizes in this series and on the condensed-phase properties validated against experimental data. The importance of the explicit treatment of electronic polarizability in empirical force fields is demonstrated in the cases of this series of molecules with vicinal hydroxyl groups that can form cooperative intra- and intermolecular hydrogen bonds. Compared to the CHARMM additive force field, improved treatment of the electrostatic interactions avoids overestimation of the gas-phase dipole moments resulting in significant improvement in the treatment of the conformational energies and leads to the correct balance of intra- and intermolecular hydrogen bonding of glycerol as evidenced by calculated heat of vaporization being in excellent agreement with experiment. Computed condensed phase data, including crystal lattice parameters and volumes and densities of aqueous solutions are in better agreement with experimental data as compared to the corresponding additive model. Such improvements are anticipated to significantly improve the treatment of polymers in general, including biological macromolecules.
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Affiliation(s)
- Xibing He
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, 20 Penn Street, Baltimore, MD 21201
| | - Pedro E. M. Lopes
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, 20 Penn Street, Baltimore, MD 21201
| | - Alexander D. MacKerell
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, 20 Penn Street, Baltimore, MD 21201
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22
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Kulschewski T, Pleiss J. A molecular dynamics study of liquid aliphatic alcohols: simulation of density and self-diffusion coefficient using a modified OPLS force field. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2013.769680] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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23
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Huang Z, Hua W, Verreault D, Allen HC. Salty glycerol versus salty water surface organization: bromide and iodide surface propensities. J Phys Chem A 2013; 117:6346-53. [PMID: 23663033 DOI: 10.1021/jp4020228] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Salty NaBr and NaI glycerol solution interfaces are examined in the OH stretching region using broadband vibrational sum frequency generation (VSFG) spectroscopy. Raman and infrared (IR) spectroscopy are used to further understand the VSFG spectroscopic signature. The VSFG spectra of salty glycerol solutions reveal that bromide and iodide anions perturb the interfacial glycerol organization in a manner similar as that found in aqueous halide salt solutions, thus confirming the presence of bromide and iodide anions at the glycerol surface. Surface tension measurements are consistent with the surface propensity suggested by the VSFG data and also show that the surface excess increases with increasing salt concentration, similar to that of water. In addition, iodide is shown to have more surface prevalence than bromide, as has also been determined from aqueous solutions. These results suggest that glycerol behaves similarly to water with respect to surface activity and solvation of halide anions at its air/liquid interface.
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Affiliation(s)
- Zishuai Huang
- Department of Chemistry and Biochemistry, The Ohio State University, 100 West 18th Avenue, Columbus, Ohio 43210, USA
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24
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Chen C, Li WZ, Song YC, Weng LD, Zhang N. Concentration dependence of water self-diffusion coefficients in dilute glycerol–water binary and glycerol–water–sodium chloride ternary solutions and the insights from hydrogen bonds. Mol Phys 2012. [DOI: 10.1080/00268976.2011.641602] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Sillrén P, Bielecki J, Mattsson J, Börjesson L, Matic A. A statistical model of hydrogen bond networks in liquid alcohols. J Chem Phys 2012; 136:094514. [DOI: 10.1063/1.3690137] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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26
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Egorov AV, Lyubartsev AP, Laaksonen A. Molecular dynamics simulation study of glycerol-water liquid mixtures. J Phys Chem B 2011; 115:14572-81. [PMID: 22004353 DOI: 10.1021/jp208758r] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
To study the effects of water on conformational dynamics of polyalcohols, Molecular Dynamics simulations of glycerol-water liquid mixtures have been carried out at different concentrations: 42.9 and 60.0 wt % of glycerol, respectively. On the basis of the analysis of backbone conformer distributions, it is found that the surrounding water molecules have a large impact on the populations of the glycerol conformers. While the local structure of water in the liquid mixture is surprisingly close to that in pure liquid water, the behavior of glycerols can be divided into three different categories where roughly 25% of them occur in a structure similar to that in pure liquid of glycerol, ca. 25% of them exist as monomers, solvated by water, and the remaining 50% of glycerols in the mixture form H-bonded strings as remains of the glycerol H-bond network. The typical glycerol H-bond network still exists even at the lower concentration of 40 wt % of glycerol. The microheterogeneity of water-glycerol mixtures is analyzed using time-averaged distributions of the sizes of the water aggregates. At 40 wt % of glycerol, the cluster sizes from 3 to 10 water molecules are observed. The increase of glycerol content causes a depletion of clusters leading to smaller 3-5 molecule clusters domination. Translational diffusion coefficients have been calculated to study the dynamical behavior of both glycerol and water molecules. Rotational-reorientational motion is studied both in overall and in selected substructures on the basis of time correlation functions. Characteristic time scales for different motional modes are deduced on the basis of the calculated correlation times. The general conclusion is that the presence of water increases the overall mobility of glycerol, while glycerol slows the mobility of water.
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Affiliation(s)
- Andrei V Egorov
- Faculty of Physics, St. Petersburg University, St. Petersburg, Russia
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Towey JJ, Soper AK, Dougan L. The structure of glycerol in the liquid state: a neutron diffraction study. Phys Chem Chem Phys 2011; 13:9397-406. [DOI: 10.1039/c0cp02136a] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Wang L, Li J, Fecht HJ. Single-exponential activation behavior behind the super-Arrhenius relaxations in glass-forming liquids. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:455104. [PMID: 21339624 DOI: 10.1088/0953-8984/22/45/455104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The reported relaxation time for several typical glass-forming liquids was analyzed by using a kinetic model for liquids which invoked a new kind of atomic cooperativity--thermodynamic cooperativity. The broadly studied 'cooperative length' was recognized as the kinetic cooperativity. Both cooperativities were conveniently quantified from the measured relaxation data. A single-exponential activation behavior was uncovered behind the super-Arrhenius relaxations for the liquids investigated. Hence the mesostructure of these liquids and the atomic mechanism of the glass transition became clearer.
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Affiliation(s)
- Lianwen Wang
- Institute of Materials Science and Engineering, Lanzhou University, Lanzhou 730000, People's Republic of China.
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Schröer W, Wiegand S, Staude W, Peters T. Dynamical Lightscattering of Pretransitional Phenomena in Liquid Mixtures. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19910950933] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Chen C, Li WZ, Song YC, Yang J. A molecular dynamics study of cryoprotective agent – Water–sodium chloride ternary solutions. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Chen C, Li WZ, Song YC, Yang J. Hydrogen bonding analysis of glycerol aqueous solutions: A molecular dynamics simulation study. J Mol Liq 2009. [DOI: 10.1016/j.molliq.2009.01.009] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Chen C, Li W, Song Y, Yang J. Molecular dynamics simulation studies of cryoprotective agent solutions: the relation between melting temperature and the ratio of hydrogen bonding acceptor to donor number. Mol Phys 2009. [DOI: 10.1080/00268970902852632] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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33
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Busselez R, Lefort R, Ji Q, Affouard F, Morineau D. Molecular dynamics simulation of nanoconfined glycerol. Phys Chem Chem Phys 2009; 11:11127-33. [DOI: 10.1039/b911859d] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Hentschel HGE, Procaccia I. Theory of relaxation dynamics in glass-forming hydrogen-bonded liquids. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 77:031507. [PMID: 18517388 DOI: 10.1103/physreve.77.031507] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2007] [Revised: 10/04/2007] [Indexed: 05/26/2023]
Abstract
We address the relaxation dynamics in hydrogen-bonded supercooled liquids near (but above) the glass transition, measured via broadband dielectric spectroscopy (BDS). We propose a theory based on decomposing the relaxation of the macroscopic dipole moment into contributions from hydrogen-bonded clusters of s molecules, with s(min) < or = s < or = s(max) . The existence of s(max) is translated into a sum rule on the concentrations of clusters of size s . We construct the statistical mechanics of the supercooled liquid subject to this sum rule as a constraint, to estimate the temperature-dependent density of clusters of size s . With a theoretical estimate of the relaxation time of each cluster, we provide predictions for the real and imaginary parts of the frequency-dependent dielectric response. The predicted spectra and their temperature dependence are in accord with measurements, explaining a host of phenomenological fits like the Vogel-Fulcher fit and the stretched exponential fit. Using glycerol as a particular example, we demonstrate quantitative correspondence between theory and experiments. The theory also demonstrates that the alpha peak and the "excess wing" stem from the same physics in this material. The theory also shows that in other hydrogen-bonded glass formers the excess wing can develop into a beta peak, depending on the molecular material parameters (predominantly the surface energy of the clusters). We thus argue that alpha and beta peaks can stem from the same physics. We address the BDS in constrained geometries (pores) and explain why recent experiments on glycerol did not show a deviation from bulk spectra. Finally, we discuss the dc part of the BDS spectrum and argue why it scales with the frequency of the alpha peak, providing an explanation for the remarkable data collapse observed in experiments.
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Affiliation(s)
- H G E Hentschel
- Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel
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36
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Blieck J, Affouard F, Bordat P, Lerbret A, Descamps M. Molecular dynamics simulations of glycerol glass-forming liquid. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2005.05.045] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Zhuang W, Dellago C. Dissociation of Hydrogen Chloride and Proton Transfer in Liquid Glycerol: An Ab Initio Molecular Dynamics Study. J Phys Chem B 2004. [DOI: 10.1021/jp047676r] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Wei Zhuang
- Department of Chemistry, University of California at Irvine, Irvine, California 92697, and Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria
| | - Christoph Dellago
- Department of Chemistry, University of California at Irvine, Irvine, California 92697, and Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria
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Chorny I, Benjamin I, Nathanson GM. Scattering, Trapping, and Ionization of HCl at the Surface of Liquid Glycerol. J Phys Chem B 2003. [DOI: 10.1021/jp035825k] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ilya Chorny
- Department of Chemistry, University of California, Santa Cruz, California 95064
| | - Ilan Benjamin
- Department of Chemistry, University of California, Santa Cruz, California 95064
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Ringeisen BR, Muenter AH, Nathanson GM. Collisions of HCl, DCl, and HBr with Liquid Glycerol: Gas Uptake, D → H Exchange, and Solution Thermodynamics. J Phys Chem B 2002. [DOI: 10.1021/jp013960w] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Bradley R. Ringeisen
- Department of Chemistry, University of WisconsinMadison, 1101 University Avenue, Madison, Wisconsin 53706-1322
| | - Annabel H. Muenter
- Department of Chemistry, University of WisconsinMadison, 1101 University Avenue, Madison, Wisconsin 53706-1322
| | - Gilbert M. Nathanson
- Department of Chemistry, University of WisconsinMadison, 1101 University Avenue, Madison, Wisconsin 53706-1322
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41
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Affiliation(s)
- Raymond D. Mountain
- Physical and Chemical Properties Division 100 Bureau Drive Stop 8380 National Institute of Standards and Technology Gaithersburg, Maryland 20899-8380
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42
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Böhmer R, Hinze G. Reorientations in supercooled glycerol studied by two-dimensional time-domain deuteron nuclear magnetic resonance spectroscopy. J Chem Phys 1998. [DOI: 10.1063/1.476557] [Citation(s) in RCA: 88] [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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43
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Root LJ, Berne BJ. Effect of pressure on hydrogen bonding in glycerol: A molecular dynamics investigation. J Chem Phys 1997. [DOI: 10.1063/1.474776] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Kane D, El‐Shall MS. Condensation of supersaturated vapors of hydrogen bonding molecules: Ethylene glycol, propylene glycol, trimethylene glycol, and glycerol. J Chem Phys 1996. [DOI: 10.1063/1.472548] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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46
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Dawidowski J, Bermejo FJ, Fayos R, Bennington SM, Criado A. Coherent neutron scattering response from glassy glycerol. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1996; 53:5079-5088. [PMID: 9964839 DOI: 10.1103/physreve.53.5079] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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47
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Bermejo FJ, Criado A, Enciso E, Schober H. Microscopic dynamics of glycerol in its crystalline and glassy states. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:5259-5267. [PMID: 9984131 DOI: 10.1103/physrevb.53.5259] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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48
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Benjamin I, Wilson M, Pohorille A. Scattering of Ne from the liquid–vapor interface of glycerol: A molecular dynamics study. J Chem Phys 1994. [DOI: 10.1063/1.467059] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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49
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Saecker ME, Nathanson GM. Collisions of protic and aprotic gases with a perfluorinated liquid. J Chem Phys 1994. [DOI: 10.1063/1.466333] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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50
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Saecker ME, Nathanson GM. Collisions of protic and aprotic gases with hydrogen bonding and hydrocarbon liquids. J Chem Phys 1993. [DOI: 10.1063/1.465425] [Citation(s) in RCA: 128] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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