1
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Shamshina JL, Rogers RD. Ionic Liquids: New Forms of Active Pharmaceutical Ingredients with Unique, Tunable Properties. Chem Rev 2023; 123:11894-11953. [PMID: 37797342 DOI: 10.1021/acs.chemrev.3c00384] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
This Review aims to summarize advances over the last 15 years in the development of active pharmaceutical ingredient ionic liquids (API-ILs), which make up a prospective game-changing strategy to overcome multiple problems with conventional solid-state drugs, for example, polymorphism. A critical part of the present Review is the collection of API-ILs and deep eutectic solvents (DESs) prepared to date. The Review covers rules for rational design of API-ILs and tools for API-IL formation, syntheses, and characterization. Nomenclature and ionic speciation, and the confusion that these may cause, are highlighted, particularly for speciation in both ILs and DESs of intermediate ionicity. We also highlight in vivo and in vitro pharmaceutical activity studies, with differences in pharmacokinetic/pharmacodynamic depending on ionicity of API-ILs. A brief overview is provided for the ILs used to deliver drugs, and the Review concludes with key prospects and roadblocks in translating API-ILs into pharmaceutical manufacturing.
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Affiliation(s)
- Julia L Shamshina
- Fiber and Biopolymer Research Institute (FBRI), Texas Tech University, Lubbock, Texas 79409, United States
| | - Robin D Rogers
- 525 Solutions, Inc., P.O. Box 2206, Tuscaloosa, Alabama 35403, United States
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2
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Biological activity, solvation properties and microstructuring of protic imidazolium ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Bakulina OD, Ivanov MY, Alimov DV, Prikhod’ko SA, Adonin NY, Fedin MV. Active Pharmaceutical Ingredient-Ionic Liquids (API-ILs): Nanostructure of the Glassy State Studied by Electron Paramagnetic Resonance Spectroscopy. Molecules 2022; 27:5117. [PMID: 36014356 PMCID: PMC9415235 DOI: 10.3390/molecules27165117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/22/2022] [Accepted: 08/02/2022] [Indexed: 12/02/2022] Open
Abstract
Active Pharmaceutical Ingredient-Ionic Liquids (API-ILs) draw increasing interest as a particular class of ILs that possess unusual physicochemical properties along with simultaneous potentials for pharmaceutical applications. Although nanostructuring phenomena were actively investigated in common ILs, their studies in API-ILs are scarce so far. In this work, using the complex methodology of Electron Paramagnetic Resonance (EPR) and dissolved spin probes, we investigate nanostructuring phenomena in a series of API-ILs: [Cnmim][Ibu], [Cnmim][Gly], and [Cnmim][Sal] with n = 2, 4, and 6, respectively. We reveal similar trends for API-ILs and common ILs, as well as peculiarities inherent to the studied API-ILs. Unusual behavior observed for [Cnmim][Ibu] has been assigned to the presence of a non-polar fragment in the [Ibu]- anion, which leads to the formation of more complex nanostructures around the radical compared to common ILs. Understanding general trends in the formation of such self-organized molecular structures is of fundamental interest and importance for applying API-ILs.
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Affiliation(s)
- Olga D. Bakulina
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia
- Physics Department, Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
| | - Mikhail Yu. Ivanov
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia
- Physics Department, Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
| | - Dmitriy V. Alimov
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia
- Physics Department, Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
| | - Sergey A. Prikhod’ko
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Avenue 5, 630090 Novosibirsk, Russia
| | - Nicolay Yu. Adonin
- Boreskov Institute of Catalysis SB RAS, Lavrentiev Avenue 5, 630090 Novosibirsk, Russia
| | - Matvey V. Fedin
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia
- Physics Department, Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
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4
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Ivanov MY, Surovtsev NV, Fedin MV. Ionic liquid glasses: properties and applications. RUSSIAN CHEMICAL REVIEWS 2022. [DOI: 10.1070/rcr5031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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5
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Abstract
Nonequilibrium processes, including physical aging, belong to the most challenging phenomena of glassy dynamics. One of the fundamental problems that needs clarification is the effect of material polarity on the time scale of the structural recovery of glass. The importance of this issue arises from practical applications and recent findings suggesting a substantial contribution of dipole-dipole interactions to the dielectric permittivity spectra of polar glass-formers. Herein, we use dielectric spectroscopy to investigate structural relaxation and aging dynamics of highly polar glass-former 4-[(4,4,5,5,5-pentafluoropentoxy)methyl]-1,3-dioxolan-2-one (FPC), a derivative of propylene carbonate with εs = 180 and μ = 5.1. We show that ε″(tage) data of FPC at Tage < Tg reveal complex behavior resulting from considerable cross-correlation effects. Namely, two characteristic aging time scales, reflecting the evolution of cross-correlation mode and generic structural relaxation toward equilibrium, are obtained at a given Tage. Furthermore, a single stretched exponential behavior of ε″(tage) has been received for weakly polar carvedilol with negligible dipole-dipole interactions.
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6
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Ivanov MY, Bakulina OD, Alimov DV, Prikhod'ko SA, Veber SL, Pylaeva S, Adonin NY, Fedin MV. Inherent heterogeneities and nanostructural anomalies in organic glasses revealed by EPR. NANOSCALE ADVANCES 2021; 3:4973-4978. [PMID: 36132341 PMCID: PMC9416887 DOI: 10.1039/d1na00452b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 07/22/2021] [Indexed: 06/15/2023]
Abstract
Intriguing heterogeneities and nanostructural reorganizations of glassy ionic liquids (ILs) have recently been found using electron paramagnetic resonance (EPR) spectroscopy. Alkyl chains of IL cations play the key role in such phenomena and govern the anomalous temperature dependence of local density and molecular mobility. In this paper we evidence and study similar manifestations in a variety of common non-IL glasses, which also contain molecules with alkyl chains. A series of phthalates clearly demonstrates very similar behavior to imidazolium-based ILs with the same length of alkyl chain. Glasses of alkyl alcohols and alkyl benzenes show only some similarities to the corresponding ILs, mainly due to a lower glass transition temperature hindering the development of the anomaly. Therefore, we demonstrate the general nature and broad scope of nanoscale structural anomalies in organic glasses based on alkyl-chain compounds. The 'roadmap' for their occurrence is provided, which aids in understanding and future applications of these anomalous nanoheterogeneities.
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Affiliation(s)
- Mikhail Yu Ivanov
- International Tomography Center SB RAS, Institutskaya Street 3a 630090 Novosibirsk Russia
| | - Olga D Bakulina
- International Tomography Center SB RAS, Institutskaya Street 3a 630090 Novosibirsk Russia
- Novosibirsk State University Pirogova Street 2 630090 Novosibirsk Russia
| | - Dmitriy V Alimov
- Novosibirsk State University Pirogova Street 2 630090 Novosibirsk Russia
| | - Sergey A Prikhod'ko
- Boreskov Institute of Catalysis SB RAS Lavrentiev Avenue 5 630090 Novosibirsk Russia
| | - Sergey L Veber
- International Tomography Center SB RAS, Institutskaya Street 3a 630090 Novosibirsk Russia
| | - Svetlana Pylaeva
- Universität Paderborn Warburger Str. 100 33098 Paderborn Germany
| | - Nicolay Yu Adonin
- Boreskov Institute of Catalysis SB RAS Lavrentiev Avenue 5 630090 Novosibirsk Russia
| | - Matvey V Fedin
- International Tomography Center SB RAS, Institutskaya Street 3a 630090 Novosibirsk Russia
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7
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Bakulina OD, Ivanov MY, Prikhod'ko SA, Pylaeva S, Zaytseva IV, Surovtsev NV, Adonin NY, Fedin MV. Nanocage formation and structural anomalies in imidazolium ionic liquid glasses governed by alkyl chains of cations. NANOSCALE 2020; 12:19982-19991. [PMID: 32996529 DOI: 10.1039/d0nr06065h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Intriguing nanostructuring anomalies have been recently observed in imidazolium ionic liquids (ILs) near their glass transition points, where local density around a nanocaged solute progressively grows up with temperature. Herewith, we for the first time demonstrate experimentally and theoretically, that these anomalies are governed by alkyl chains of cations and crucially depend on their length. Electron Paramagnetic Resonance (EPR) spectroscopy on a series of ILs [Cnmim]BF4 (n = 0-12) shows that only the chains with n = 3-10 favor anomaly. Moreover, remarkable even vs. odd n peculiarities were systematically observed. Finally, similar anomaly was for the first time observed for a non-IL glass of dibutyl phthalate, which structurally mimics cations of imidazolium ILs. Therefore, such anomalous density behavior in a glassy state nanocage goes far beyond ILs and proves to be a more general phenomenon, which can be structurally tuned and rationally adjusted for various potential applications in nanoscale materials.
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Affiliation(s)
- Olga D Bakulina
- International Tomography Center SB RAS, Institutskaya Street 3a, 630090 Novosibirsk, Russia.
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8
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Holt AP, Fragiadakis D, Roland CM. Pressure densified 1,3,5-tri(1-naphthyl)benzene glass. I. Volume recovery and physical aging. J Chem Phys 2019; 151:184502. [PMID: 31731837 DOI: 10.1063/1.5122765] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The effects of pressure densification on 1,3,5-tri(1-naphthyl)benzene (TNB) are assessed from volumetric and calorimetric measurements. The pressure densified glass (PDG) has higher density than conventional glass (CG), but unlike ultrastable TNB glass prepared using vapor deposition which also has elevated density, TNB PDG exhibits higher enthalpy and lower thermal stability than when formed at ambient pressure. PDG also exhibits anomalous physical aging. Rather than evolving monotonically toward the equilibrium density, there is an overshoot to a lower density state. Only when the density of the PDG becomes equivalent to the corresponding CG does the density begin a slow approach toward equilibrium.
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Affiliation(s)
- A P Holt
- Naval Research Laboratory, Chemistry Division, Washington, DC 20375-5342, USA
| | - D Fragiadakis
- Naval Research Laboratory, Chemistry Division, Washington, DC 20375-5342, USA
| | - C M Roland
- Naval Research Laboratory, Chemistry Division, Washington, DC 20375-5342, USA
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9
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Tarnacka M, Talik A, Kamińska E, Geppert-Rybczyńska M, Kaminski K, Paluch M. The Impact of Molecular Weight on the Behavior of Poly(propylene glycol) Derivatives Confined within Alumina Templates. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00209] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
| | | | - Ewa Kamińska
- Department of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice,School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Jagiellonska 4, 41-200 Sosnowiec, Poland
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10
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Wojnarowska Z, Tajber L, Paluch M. Density Scaling in Ionic Glass Formers Controlled by Grotthuss Conduction. J Phys Chem B 2019; 123:1156-1160. [DOI: 10.1021/acs.jpcb.8b09396] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Z. Wojnarowska
- Institute of Physics, University of Silesia, SMCEBI, 75 Pulku Piechoty 1A, Chorzow 41-500, Poland
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - L. Tajber
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, College Green, Dublin 2, Ireland
| | - M. Paluch
- Institute of Physics, University of Silesia, SMCEBI, 75 Pulku Piechoty 1A, Chorzow 41-500, Poland
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11
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Wojnarowska Z, Rams-Baron M, Knapik-Kowalczuk J, Połatyńska A, Pochylski M, Gapinski J, Patkowski A, Wlodarczyk P, Paluch M. Experimental evidence of high pressure decoupling between charge transport and structural dynamics in a protic ionic glass-former. Sci Rep 2017; 7:7084. [PMID: 28765639 PMCID: PMC5539233 DOI: 10.1038/s41598-017-07136-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 06/23/2017] [Indexed: 11/16/2022] Open
Abstract
In this paper the relaxation dynamics of ionic glass-former acebutolol hydrochloride (ACB-HCl) is studied as a function of temperature and pressure by using dynamic light scattering and broadband dielectric spectroscopy. These unique experimental data provide the first direct evidence that the decoupling between the charge transport and structural relaxation exists in proton conductors over a wide T-P thermodynamic space, with the time scale of structural relaxation being constant at the liquid-glass transition (τα = 1000 s). We demonstrate that the enhanced proton transport, being a combination of intermolecular H+ hopping between cation and anion as well as tautomerization process within amide moiety of ACB molecule, results in a breakdown of the Stokes-Einstein relation at ambient and elevated pressure with the fractional exponent k being pressure dependent. The dTg/dP coefficient, stretching exponent βKWW and dynamic modulus Ea/ΔV# were found to be the same regardless of the relaxation processes studied. This is in contrast to the apparent activation volume parameter that is different when charge transport and structural dynamics are considered. These experimental results together with theoretical considerations create new ideas to design efficient proton conductors for potential electrochemical applications.
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Affiliation(s)
- Z Wojnarowska
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007, Katowice, Poland. .,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500, Chorzow, Poland.
| | - M Rams-Baron
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007, Katowice, Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500, Chorzow, Poland
| | - J Knapik-Kowalczuk
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007, Katowice, Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500, Chorzow, Poland
| | - A Połatyńska
- Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland
| | - M Pochylski
- Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland
| | - J Gapinski
- Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland.,NanoBioMedical Centre, A. Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland
| | - A Patkowski
- Faculty of Physics, A. Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland.,NanoBioMedical Centre, A. Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland
| | - P Wlodarczyk
- Institute of Non-Ferrous Metals, Sowinskiego 5, 44-100, Gliwice, Poland
| | - M Paluch
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007, Katowice, Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500, Chorzow, Poland
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12
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Tarnacka M, Madejczyk O, Kaminski K, Paluch M. Time and Temperature as Key Parameters Controlling Dynamics and Properties of Spatially Restricted Polymers. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00616] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Magdalena Tarnacka
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Olga Madejczyk
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Kamil Kaminski
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Marian Paluch
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, ul. 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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13
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14
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Abstract
Glass is an ultraviscous liquid that ceases to flow on a laboratory timescale but continues to relax on a geological timescale. Quintessentially, it has become hopeless for humans to explore the equilibrium behavior of glass, although the technology of glass making witness a remarkable advance. In this work, we propose a novel thermodynamic path to prepare a high density amorphous state of matter (carvedilol dihydrogen phosphate) using high pressure. In addition, we provide the impeccable experimental evidence of heterogeneous nature of secondary β-relaxation and probe its properties to understand the various aspects of pressure densified glass, such as dynamics, packing and disorder. These features are expected to provide new horizons to glass preparation and functional response to pharmaceutical applications.
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15
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Egorova KS, Gordeev EG, Ananikov VP. Biological Activity of Ionic Liquids and Their Application in Pharmaceutics and Medicine. Chem Rev 2017; 117:7132-7189. [PMID: 28125212 DOI: 10.1021/acs.chemrev.6b00562] [Citation(s) in RCA: 911] [Impact Index Per Article: 130.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Ionic liquids are remarkable chemical compounds, which find applications in many areas of modern science. Because of their highly tunable nature and exceptional properties, ionic liquids have become essential players in the fields of synthesis and catalysis, extraction, electrochemistry, analytics, biotechnology, etc. Apart from physical and chemical features of ionic liquids, their high biological activity has been attracting significant attention from biochemists, ecologists, and medical scientists. This Review is dedicated to biological activities of ionic liquids, with a special emphasis on their potential employment in pharmaceutics and medicine. The accumulated data on the biological activity of ionic liquids, including their antimicrobial and cytotoxic properties, are discussed in view of possible applications in drug synthesis and drug delivery systems. Dedicated attention is given to a novel active pharmaceutical ingredient-ionic liquid (API-IL) concept, which suggests using traditional drugs in the form of ionic liquid species. The main aim of this Review is to attract a broad audience of chemical, biological, and medical scientists to study advantages of ionic liquid pharmaceutics. Overall, the discussed data highlight the importance of the research direction defined as "Ioliomics", studies of ions in liquids in modern chemistry, biology, and medicine.
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Affiliation(s)
- Ksenia S Egorova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, Moscow 119991, Russia
| | - Evgeniy G Gordeev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, Moscow 119991, Russia
| | - Valentine P Ananikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences , Leninsky prospect 47, Moscow 119991, Russia.,Department of Chemistry, Saint Petersburg State University , Stary Petergof 198504, Russia
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16
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Tarnacka M, Kaminski K, Mapesa EU, Kaminska E, Paluch M. Studies on the Temperature and Time Induced Variation in the Segmental and Chain Dynamics in Poly(propylene glycol) Confined at the Nanoscale. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01237] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Magdalena Tarnacka
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Kamil Kaminski
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - Emmanuel U. Mapesa
- Institute
of Experimental Physics I, University of Leipzig, Linnéstraße
5, 04103 Leipzig, Germany
| | - Ewa Kaminska
- Department
of Pharmacognosy and Phytochemistry, Medical University of Silesia in Katowice, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Jagiellonska 4, 41-200 Sosnowiec, Poland
| | - Marian Paluch
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center for Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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17
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Wojnarowska Z, Knapik J, Rams-Baron M, Jedrzejowska A, Paczkowska M, Krause A, Cielecka-Piontek J, Jaworska M, Lodowski P, Paluch M. Amorphous Protic Ionic Systems as Promising Active Pharmaceutical Ingredients: The Case of the Sumatriptan Succinate Drug. Mol Pharm 2016; 13:1111-22. [PMID: 26836258 DOI: 10.1021/acs.molpharmaceut.5b00911] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In this article, we highlight the benefits coming from the application of amorphous protic ionic systems as active pharmaceutical ingredients (APIs). Using the case of the sumatriptan (STR) drug, we show that the conversion of nonionic API to partially ionized amorphous protic succinate salt (STR SUCC) brings a substantial improvement in apparent solubility. Since in general the disordered systems reveal a tendency to self-arrangement during storage, the dominant part of this article is dedicated to the physical stability issue of sumatriptan and its ionic counterpart. To recognize the crystallization tendency of the studied systems, the calorimetric measurements were performed. Additionally, the role of ion dynamics in spontaneous nucleation of amorphous sumatriptan succinate is discussed. The differential scanning calorimetry analysis of ionic and nonionic sumatriptan reveals many similarities in thermal properties of these APIs as well as distinct differences in their resistance against crystallization in the supercooled liquid state. To determine the long-term physical stability of STR SUCC at room temperature conditions, the time scale of structural relaxation below their glass transition temperatures is estimated. We show that in contrast to nonionic materials, τα predictions of STR SUCC are much more complex and require aging experiments.
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Affiliation(s)
- Z Wojnarowska
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - J Knapik
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M Rams-Baron
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - A Jedrzejowska
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M Paczkowska
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Poznan University of Medical Sciences , Grunwaldzka 6, 60-780 Poznań, Poland
| | - A Krause
- PozLab sp. z.o.o. Parkowa 2, 60-775 Poznań, Poland
| | - J Cielecka-Piontek
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Poznan University of Medical Sciences , Grunwaldzka 6, 60-780 Poznań, Poland
| | - M Jaworska
- Institute of Chemistry, Department of Theoretical Chemistry, University of Silesia , Szkolna 9, 40-006 Katowice, Poland
| | - P Lodowski
- Institute of Chemistry, Department of Theoretical Chemistry, University of Silesia , Szkolna 9, 40-006 Katowice, Poland
| | - M Paluch
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland.,SMCEBI , 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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18
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Rams-Baron M, Wojnarowska Z, Jedrzejowska A, Swiety-Pospiech A, Paluch M. The implications of various molecular interactions on the dielectric behavior of cimetidine and cimetidine hydrochloride. RSC Adv 2016. [DOI: 10.1039/c6ra17685b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We employed broadband dielectric spectroscopy to characterize the molecular dynamics of cimetidine base and cimetidine hydrochloride, materials with similar structural skeletons but involving different molecular interactions (ionic vs. non-ionic).
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Affiliation(s)
- M. Rams-Baron
- Institute of Physics
- University of Silesia
- 40-007 Katowice
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - Z. Wojnarowska
- Institute of Physics
- University of Silesia
- 40-007 Katowice
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - A. Jedrzejowska
- Institute of Physics
- University of Silesia
- 40-007 Katowice
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - A. Swiety-Pospiech
- Institute of Physics
- University of Silesia
- 40-007 Katowice
- Poland
- Silesian Center for Education and Interdisciplinary Research
| | - M. Paluch
- Institute of Physics
- University of Silesia
- 40-007 Katowice
- Poland
- Silesian Center for Education and Interdisciplinary Research
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Greaves TL, Drummond CJ. Protic Ionic Liquids: Evolving Structure-Property Relationships and Expanding Applications. Chem Rev 2015; 115:11379-448. [PMID: 26426209 DOI: 10.1021/acs.chemrev.5b00158] [Citation(s) in RCA: 513] [Impact Index Per Article: 57.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Tamar L Greaves
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University , GPO Box 2476, Melbourne, Victoria 3001, Australia
| | - Calum J Drummond
- School of Applied Sciences, College of Science, Engineering and Health, RMIT University , GPO Box 2476, Melbourne, Victoria 3001, Australia
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20
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Balk A, Holzgrabe U, Meinel L. 'Pro et contra' ionic liquid drugs - Challenges and opportunities for pharmaceutical translation. Eur J Pharm Biopharm 2015; 94:291-304. [PMID: 26070389 DOI: 10.1016/j.ejpb.2015.05.027] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/25/2015] [Accepted: 05/26/2015] [Indexed: 12/29/2022]
Abstract
Ionic liquids (ILs) are organic salts with a melting point below 100°C. Active pharmaceutical ingredients (APIs) are transformed into ILs by combining them with typically large yet charged counterions. ILs hold promise to build a large design space for relevant pharmaceutical parameters, particularly for poorly water soluble drugs. It is for this wide design space that ILs may be the entry into the fascinating vision of modifying physico-chemical properties without the need to structurally modify the active pharmaceutical ingredient itself. This extremely intriguing pharmaceutical option is critically discussed including its potential and limitations. The review is starting off with an introduction to the metathesis and characterization of ILs, and leads over to examples for pharmaceutical application, including enhancement of dissolution rate and kinetic solubility and hygroscopicity adaptation, respectively. Tuning biopharmaceutics and toxicology by proper IL design is another focus. The review connects the interrelated chemical, physical, pharmaceutical, and toxicological outcome of API-ILs, serving as guidance for the formulation scientist who aims at expanding ones armamentarium for poorly water soluble APIs while avoiding structural modification, thereof.
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Affiliation(s)
- Anja Balk
- Institute for Pharmacy, Am Hubland, University of Würzburg, DE-97074 Würzburg, Germany
| | - Ulrike Holzgrabe
- Institute for Pharmacy, Am Hubland, University of Würzburg, DE-97074 Würzburg, Germany
| | - Lorenz Meinel
- Institute for Pharmacy, Am Hubland, University of Würzburg, DE-97074 Würzburg, Germany.
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21
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Tripathy SN, Wojnarowska Z, Knapik J, Shirota H, Biswas R, Paluch M. Glass transition dynamics and conductivity scaling in ionic deep eutectic solvents: The case of (acetamide + lithium nitrate/sodium thiocyanate) melts. J Chem Phys 2015; 142:184504. [DOI: 10.1063/1.4919946] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Satya N. Tripathy
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Zaneta Wojnarowska
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Justyna Knapik
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Hideaki Shirota
- Department of Nanomaterial Science and Department of Chemistry, Chiba University, 1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
| | - Ranjit Biswas
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake, Kolkata 700098, India
| | - Marian Paluch
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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22
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Wojnarowska Z, Paluch M. Recent progress on dielectric properties of protic ionic liquids. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:073202. [PMID: 25634823 DOI: 10.1088/0953-8984/27/7/073202] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Protic ionic liquids (PILs) are key materials for a wide range of emerging technologies. In particular, these systems have long been envisioned as promising candidates for fuel cells. Therefore, in recent years special attention has been devoted to thorough studies of these compounds. Amongst others, dielectric properties of PILs at ambient and elevated pressure have become the subject of intense research. The reason for this lies in the role of broadband dielectric spectroscopy in recognizing the conductivity mechanism in protic ionic systems. In this paper, we summarize the dielectric results of various PILs reflecting recent advances in this field.
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Affiliation(s)
- Zaneta Wojnarowska
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
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23
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Wojnarowska Z, Paluch KJ, Shoifet E, Schick C, Tajber L, Knapik J, Wlodarczyk P, Grzybowska K, Hensel-Bielowka S, Verevkin SP, Paluch M. Molecular origin of enhanced proton conductivity in anhydrous ionic systems. J Am Chem Soc 2015; 137:1157-64. [PMID: 25558882 DOI: 10.1021/ja5103458] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Ionic systems with enhanced proton conductivity are widely viewed as promising electrolytes in fuel cells and batteries. Nevertheless, a major challenge toward their commercial applications is determination of the factors controlling the fast proton hopping in anhydrous conditions. To address this issue, we have studied novel proton-conducting materials formed via a chemical reaction of lidocaine base with a series of acids characterized by a various number of proton-active sites. From ambient and high pressure experimental data, we have found that there are fundamental differences in the conducting properties of the examined salts. On the other hand, DFT calculations revealed that the internal proton hopping within the cation structure strongly affects the pathways of mobility of the charge carrier. These findings offer a fresh look on the Grotthuss-type mechanism in protic ionic glasses as well as provide new ideas for the design of anhydrous materials with exceptionally high proton conductivity.
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Affiliation(s)
- Zaneta Wojnarowska
- Institute of Physics, University of Silesia , Uniwersytecka 4, 40-007 Katowice, Poland
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Abstract
Abstract
Focusing on metallic glasses as model systems, we review the features and mechanisms of the β-relaxations, which are intrinsic and universal to supercooled liquids and glasses, and demonstrate their importance in understanding many crucial unresolved issues in glassy physics and materials science, including glass transition phenomena, mechanical properties, shear-banding dynamics and deformation mechanisms, diffusion and the breakdown of the Stokes–Einstein relation as well as crystallization and stability of glasses. We illustrate that it is an attractive prospect to incorporate these insights into the design of new glassy materials with extraordinary properties. We also outline important questions regarding the nature of β-relaxations and highlight some emerging research directions in this still-evolving field.
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Affiliation(s)
- Hai Bin Yu
- Physikalisches Institut, Universität Göttingen, D-37077 Göttingen, Germany
| | - Wei Hua Wang
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Hai Yang Bai
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Konrad Samwer
- Physikalisches Institut, Universität Göttingen, D-37077 Göttingen, Germany
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25
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Adrjanowicz K, Kaminski K, Dulski M, Jasiurkowska-Delaporte M, Kolodziejczyk K, Jarek M, Bartkowiak G, Hawelek L, Jurga S, Paluch M. Dynamic Glass Transition and Electrical Conductivity Behavior Dominated by Proton Hopping Mechanism Studied in the Family of Hyperbranched Bis-MPA Polyesters. Macromolecules 2014. [DOI: 10.1021/ma5006155] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
| | - K. Kaminski
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - M. Dulski
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | | | - K. Kolodziejczyk
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | | | - G. Bartkowiak
- Faculty
of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznan, Poland
| | - L. Hawelek
- Institute of Non
Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland
| | | | - M. Paluch
- Institute
of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Silesian
Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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26
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Wojnarowska Z, Knapik J, Díaz M, Ortiz A, Ortiz I, Paluch M. Conductivity Mechanism in Polymerized Imidazolium-Based Protic Ionic Liquid [HSO3–BVIm][OTf]: Dielectric Relaxation Studies. Macromolecules 2014. [DOI: 10.1021/ma5003479] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Z. Wojnarowska
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- SMCEBI 75 Pułku Piechoty
1A, 41-500 Chorzow, Poland
| | - J. Knapik
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- SMCEBI 75 Pułku Piechoty
1A, 41-500 Chorzow, Poland
| | - M. Díaz
- Department
of Chemical and Biomolecular Engineering, University of Cantabria, Santander, Spain
| | - A. Ortiz
- Department
of Chemical and Biomolecular Engineering, University of Cantabria, Santander, Spain
| | - I. Ortiz
- Department
of Chemical and Biomolecular Engineering, University of Cantabria, Santander, Spain
| | - M. Paluch
- Institute
of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
- SMCEBI 75 Pułku Piechoty
1A, 41-500 Chorzow, Poland
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27
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Casalini R, Roland CM. Effect of Regioisomerism on the Local Dynamics of Polychlorostyrene. Macromolecules 2014. [DOI: 10.1021/ma5008495] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- R. Casalini
- Chemistry Division, Naval Research Laboratory, Code 6120, Washington, D.C. 20375-5342, United States
| | - C. M. Roland
- Chemistry Division, Naval Research Laboratory, Code 6120, Washington, D.C. 20375-5342, United States
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28
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Wojnarowska Z, Ngai KL, Paluch M. Deducting the temperature dependence of the structural relaxation time in equilibrium far below the nominal Tg by aging the decoupled conductivity relaxation to equilibrium. J Chem Phys 2014; 140:174502. [DOI: 10.1063/1.4872260] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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29
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Fragiadakis D, Roland CM. Dynamic correlations and heterogeneity in the primary and secondary relaxations of a model molecular liquid. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:052304. [PMID: 25353797 DOI: 10.1103/physreve.89.052304] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Indexed: 06/04/2023]
Abstract
Molecular dynamics simulations were carried out on a series of Lennard-Jones binary mixtures of rigid, asymmetric, dumbbell-shaped molecules. Below an onset temperature, the rotational and translational dynamics split into the slow structural α relaxation and a higher-frequency Johari-Goldstein β relaxation. Both processes are dynamically heterogeneous, having broad distributions of relaxation times. However, only the α relaxation shows strong dynamic correlations; correlations at the β time scale are weak, in particular for molecules having shorter bonds. Despite the close connection between the two processes, we find no correlation between the α and β relaxation times of individual molecules; that is, a molecule exhibiting slow β motion does not necessarily undergo slow α dynamics and likewise for fast molecules. However, the single-molecule α relaxation times do correlate with both the α and β relaxation strengths.
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Affiliation(s)
- D Fragiadakis
- Naval Research Laboratory, Chemistry Division, Code 6120, Washington, DC 20375-5342, USA
| | - C M Roland
- Naval Research Laboratory, Chemistry Division, Code 6120, Washington, DC 20375-5342, USA
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30
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Cangialosi D. Dynamics and thermodynamics of polymer glasses. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:153101. [PMID: 24675099 DOI: 10.1088/0953-8984/26/15/153101] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The fate of matter when decreasing the temperature at constant pressure is that of passing from gas to liquid and, subsequently, from liquid to crystal. However, a class of materials can exist in an amorphous phase below the melting temperature. On cooling such materials, a glass is formed; that is, a material with the rigidity of a solid but exhibiting no long-range order. The study of the thermodynamics and dynamics of glass-forming systems is the subject of continuous research. Within the wide variety of glass formers, an important sub-class is represented by glass forming polymers. The presence of chain connectivity and, in some cases, conformational disorder are unfavourable factors from the point of view of crystallization. Furthermore, many of them, such as amorphous thermoplastics, thermosets and rubbers, are widely employed in many applications. In this review, the peculiarities of the thermodynamics and dynamics of glass-forming polymers are discussed, with particular emphasis on those topics currently the subject of debate. In particular, the following aspects will be reviewed in the present work: (i) the connection between the pronounced slowing down of glassy dynamics on cooling towards the glass transition temperature (Tg) and the thermodynamics; and, (ii) the fate of the dynamics and thermodynamics below Tg. Both aspects are reviewed in light of the possible presence of a singularity at a finite temperature with diverging relaxation time and zero configurational entropy. In this context, the specificity of glass-forming polymers is emphasized.
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Affiliation(s)
- D Cangialosi
- Materials Physics Center, Paseo Manuel de Lardizabel 5 20018 San Sebastian, Spain
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31
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Wojnarowska Z, Wang Y, Paluch KJ, Sokolov AP, Paluch M. Observation of highly decoupled conductivity in protic ionic conductors. Phys Chem Chem Phys 2014; 16:9123-7. [DOI: 10.1039/c4cp00899e] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Using dielectric spectroscopy, we report the observation of highly decoupled conductivity in a newly synthesized protic ionic conductor, lidocaine di-(dihydrogen phosphate).
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Affiliation(s)
- Zaneta Wojnarowska
- Institute of Physics
- University of Silesia
- 40-007 Katowice, Poland
- SMCEBI
- 41-500 Chorzów, Poland
| | - Yangyang Wang
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge, USA
| | - Krzysztof J. Paluch
- School of Pharmacy and Pharmaceutical Sciences
- Trinity College Dublin
- Dublin 2, Ireland
| | - Alexei P. Sokolov
- Chemical Sciences Division
- Oak Ridge National Laboratory
- Oak Ridge, USA
- Department of Chemistry
- University of Tennessee
| | - Marian Paluch
- Institute of Physics
- University of Silesia
- 40-007 Katowice, Poland
- SMCEBI
- 41-500 Chorzów, Poland
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32
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Wojnarowska Z, Jarosz G, Grzybowski A, Pionteck J, Jacquemin J, Paluch M. On the scaling behavior of electric conductivity in [C4mim][NTf2]. Phys Chem Chem Phys 2014; 16:20444-50. [DOI: 10.1039/c4cp02253j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In this work we examine, for the first time, the molar conductivity behavior of the deeply supercooled room temperature ionic liquid [C4mim][NTf2] in the temperature, pressure and volume thermodynamic space in terms of density scaling regime (TVγ)−1 combined with the equation of state (EOS).
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Affiliation(s)
- Z. Wojnarowska
- Institute of Physics
- University of Silesia
- 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research
- 41-500 Chorzów, Poland
| | - G. Jarosz
- Institute of Physics
- University of Silesia
- 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research
- 41-500 Chorzów, Poland
| | - A. Grzybowski
- Institute of Physics
- University of Silesia
- 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research
- 41-500 Chorzów, Poland
| | - J. Pionteck
- Leibniz Institute of Polymer Research Dresden
- D-01069 Dresden, Germany
| | - J. Jacquemin
- The School of Chemistry and Chemical Engineering/QUILL Research Centre
- Queen’s University of Belfast
- David Keir Building
- Belfast BT9 5AG, UK
| | - M. Paluch
- Institute of Physics
- University of Silesia
- 40-007 Katowice, Poland
- Silesian Center for Education and Interdisciplinary Research
- 41-500 Chorzów, Poland
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33
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Wojnarowska Z, Grzybowska K, Hawelek L, Dulski M, Wrzalik R, Gruszka I, Paluch M, Pienkowska K, Sawicki W, Bujak P, Paluch KJ, Tajber L, Markowski J. Molecular Dynamics, Physical Stability and Solubility Advantage from Amorphous Indapamide Drug. Mol Pharm 2013; 10:3612-27. [DOI: 10.1021/mp400116q] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Z. Wojnarowska
- Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - K. Grzybowska
- Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - L. Hawelek
- Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
- Institute of Non-Ferrous Metals, ul. Sowinskiego 5, 44-100 Gliwice, Poland
| | - M. Dulski
- Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - R. Wrzalik
- Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - I. Gruszka
- Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - M. Paluch
- Institute of Physics, University of Silesia, ul. Uniwersytecka 4, 40-007 Katowice, Poland
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34
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Swiety-Pospiech A, Wojnarowska Z, Hensel-Bielowka S, Pionteck J, Paluch M. Effect of pressure on decoupling of ionic conductivity from structural relaxation in hydrated protic ionic liquid, lidocaine HCl. J Chem Phys 2013; 138:204502. [DOI: 10.1063/1.4807487] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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35
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Paluch M, Wojnarowska Z, Hensel-Bielowka S. Heterogeneous dynamics of prototypical ionic glass CKN monitored by physical aging. PHYSICAL REVIEW LETTERS 2013; 110:015702. [PMID: 23383807 DOI: 10.1103/physrevlett.110.015702] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 10/22/2012] [Indexed: 05/16/2023]
Abstract
In this Letter, we investigate the time evolution of the conductivity relaxation process in a prototypical ionic glass former, [Ca(NO(3))(2)](0.4)[KNO(3)](0.6) (CKN), undergoing physical aging. It is demonstrated that the heterogeneous nature of molecular dynamics is manifested by an increase in the slope of the high frequency wing of the conductivity relaxation peak as the sample is annealed below the glass transition temperature. This finding is also confirmed for other ionic glass formers. Additionally, we analyze the kinetics of the change in the ionic conductivity in glassy CKN to probe its structural relaxation.
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Affiliation(s)
- M Paluch
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
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36
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Boucher VM, Cangialosi D, Alegría A, Colmenero J. Time dependence of the segmental relaxation time of poly(vinyl acetate)-silica nanocomposites. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2012; 86:041501. [PMID: 23214585 DOI: 10.1103/physreve.86.041501] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Indexed: 06/01/2023]
Abstract
The aging-time dependence of the segmental relaxation time of poly(vinyl acetate) (PVAc) in the glassy state is investigated in the bulk polymer and its nanocomposites with silica (SiO(2)). These systems present identical segmental dynamics, when this is probed in the equilibrium supercooled liquid by broadband dielectric spectroscopy. An acceleration of the physical aging process of PVAc with SiO(2) was detected by monitoring the enthalpy recovery through differential scanning calorimetry. The segmental relaxation time during physical aging, followed by means of BDS, has been shown to increase more rapidly the higher the SiO(2) concentration in PVAc is. Thermally stimulated depolarization current experiments show that this is the case over the whole probed glassy state. This means that nanocomposites displaying a relatively slow segmental mobility evolve toward equilibrium more rapidly than the bulk. Furthermore, despite the faster increase in the relaxation time with aging time, so-called self-retardation, the nanocomposites and their bulk counterpart reach the same values of equilibrium relaxation time. These findings not only confirm the assumption of identical equilibrium dynamics even in the aging regime for all nanocomposites and bulk polymers, proposed in previous works, but also highlight the fact that the physical aging rate is not determined solely by the polymer segmental dynamics, the amount of interface being an additional relevant parameter.
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Affiliation(s)
- Virginie M Boucher
- Centro de Física de Materiales (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
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