1
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Drake AD, He Y, Ladipo F, Knutson BL, Rankin SE. Effect of Pore Confinement of Ionic Liquids on Solute Diffusion within Mesoporous Silica Microparticles. J Phys Chem B 2024. [PMID: 38478906 DOI: 10.1021/acs.jpcb.4c01018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024]
Abstract
The transport properties of the ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) confined within silica microparticles with well-ordered, accessible mesopores (5.4 or 9 nm diameter) were investigated. [BMIM][PF6] confinement was confirmed by using differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. The transport properties of the confined IL were studied using the neutral and cationic fluorescent probes 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) and rhodamine 6G, respectively, through fluorescence recovery after photobleaching (FRAP) in confocal microscopy. The diffusivity of DCM in 9 nm pores is 0.026 ± 0.0091 μm2/s, which is 2 orders of magnitude less than in the bulk ionic liquid. The pore size did not affect the diffusivity of DCM in unmodified silica nanopores. The diffusivity of the cationic probe is reduced by 63% relative to that of the neutral probe. Diffusivity is increased with water content, where equilibrium hydration of the system leads to a 37% increase in DCM diffusivity. The most dramatic impact on diffusivity was caused by tethering an IL-like methylimidazolium chloride group to the pores, which increased the pore hydrophobicity and resulted in 3-fold higher diffusivity of DCM compared to bare silica pores. Subsequent exchange of the chloride anion from the tethering group with PF6- decreased the diffusivity to half that of bare silica. The diffusion of probe molecules is affected most strongly by the pore wall effects on probe interactions rather than by the pore size itself, which suggests that understanding pore wall diffusion is critical to the design of nanoconfined ILs for separations, catalysis, and energy storage.
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Affiliation(s)
- Andrew D Drake
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington, Kentucky 40506-0046, United States
| | - Yuxin He
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington, Kentucky 40506-0046, United States
| | - Folami Ladipo
- Department of Chemistry, University of Kentucky, 125 Chemistry/Physics Building, Lexington, Kentucky 40506-0055, United States
| | - Barbara L Knutson
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington, Kentucky 40506-0046, United States
| | - Stephen E Rankin
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington, Kentucky 40506-0046, United States
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2
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Li H, Wang J, Warr GG, Atkin R. Effect of Potential on the Nanostructure Dynamics of Ethylammonium Nitrate at a Graphite Electrode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306011. [PMID: 37806754 DOI: 10.1002/smll.202306011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/20/2023] [Indexed: 10/10/2023]
Abstract
Video-rate atomic force microscopy (AFM) is used to study the near-surface nanostructure dynamics of the ionic liquid ethylammonium nitrate (EAN) at a highly oriented pyrolytic graphite (HOPG) electrode as a function of potential in real-time for the first time. The effects of varying the surface potential and adding 10 wt% water on the nanostructure diffusion coefficient are probed. For both EAN and the 90 wt% EAN-water mixture, disk-like features ≈9 nm in diameter and 1 nm in height form above the Stern layer at all potentials. The nanostructure diffusion coefficient increases with potential (from OCP -0.5 V to OCP +0.5 V) and with added water. Nanostructure dynamics depends on both the magnitude and direction of the potential change. Upon switching the potential from OCP -0.5 V to OCP +0.5 V, a substantial increase in the diffusion coefficients is observed, likely due to the absence of solvophobic interactions between the nitrate (NO3 - ) anions and the ethylammonium (EA+ ) cations in the near-surface region. When the potential is reversed, EA+ is attracted to the Stern layer to replace NO3 - , but its movement is hindered by solvophobic attractions. The outcomes will aid applications, including electrochemical devices, catalysts, and lubricants.
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Affiliation(s)
- Hua Li
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, 6009, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, 6009, Australia
| | - Jianan Wang
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, 6009, Australia
| | - Gregory G Warr
- School of Chemistry and Sydney Nano Institute, The University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Rob Atkin
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, 6009, Australia
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3
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Minecka A, Tarnacka M, Jurkiewicz K, Żakowiecki D, Kamiński K, Kamińska E. Mesoporous Matrices as a Promising New Generation of Carriers for Multipolymorphic Active Pharmaceutical Ingredient Aripiprazole. Mol Pharm 2023; 20:5655-5667. [PMID: 37756382 PMCID: PMC10630940 DOI: 10.1021/acs.molpharmaceut.3c00524] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 09/09/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023]
Abstract
The enhancement of the properties (i.e., poor solubility and low bioavailability) of currently available active pharmaceutical ingredients (APIs) is one of the major goals of modern pharmaceutical sciences. Among different strategies, a novel and innovative route to reach this milestone seems to be the application of nanotechnology, especially the incorporation of APIs into porous membranes composed of pores of nanometric size and made of nontoxic materials. Therefore, in this work, taking the antipsychotic API aripiprazole (APZ) infiltrated into various types of mesoporous matrices (anodic aluminum oxide, native, and silanized silica) characterized by similar pore diameters (d = 8-10 nm) as an example, we showed the advantage of incorporated systems in comparison to the bulk substance considering the crystallization kinetics, molecular dynamics, and physical stability. Calorimetric investigations supported by the temperature-dependent X-ray diffraction measurements revealed that in the bulk system the recrystallization of polymorph III, which next is converted to the mixture of forms IV and I, is visible, while in the case of confined samples polymorphic forms I and III of APZ are produced upon heating of the molten API with different rates. Importantly, the two-step crystallization observed in thermograms obtained for the API infiltrated into native silica templates may suggest crystal formation by the interfacial and core molecules. Furthermore, dielectric studies enabled us to conclude that there is no trace of crystallization of spatially restricted API during one month of storage at T = 298 K. Finally, we found that in contrast to the crystalline and amorphous bulk samples, all examined confined systems show a logarithmic increase in API dissolution over time (very close to a prolonged release effect) without any sign of precipitation. Our data demonstrated that mesoporous matrices appear to be interesting candidates as carriers for unstable amorphous APIs, like APZ. In addition to protecting them against crystallization, they can provide the desired prolonged release effect, which may increase the drug concentration in the blood (resulting in higher bioavailability). We believe that the "nanostructirization" in terms of the application of porous membranes as a novel generation of drug carriers might open unique perspectives in the further development of drugs characterized by prolonged release.
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Affiliation(s)
- Aldona Minecka
- Department
of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences
in Sosnowiec, Medical University of Silesia
in Katowice, 41-200 Sosnowiec, Poland
| | - Magdalena Tarnacka
- A.
Chelkowski Institute of Physics, University
of Silesia in Katowice, 41-500 Chorzow, Poland
| | - Karolina Jurkiewicz
- A.
Chelkowski Institute of Physics, University
of Silesia in Katowice, 41-500 Chorzow, Poland
| | - Daniel Żakowiecki
- Chemische
Fabrik Budenheim KG, Rheinstrasse 27, 55257 Budenheim, Germany
| | - Kamil Kamiński
- A.
Chelkowski Institute of Physics, University
of Silesia in Katowice, 41-500 Chorzow, Poland
| | - Ewa Kamińska
- Department
of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences
in Sosnowiec, Medical University of Silesia
in Katowice, 41-200 Sosnowiec, Poland
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Hessling J, Lange M, Schönhoff M. Confinement-enhanced Li + ion dynamics in an ionic liquid-based electrolyte in porous material. Phys Chem Chem Phys 2023; 25:23510-23518. [PMID: 37646481 DOI: 10.1039/d3cp02901h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
While Ionic Liquids (IL) are promising liquid electrolyte components for Li-ion batteries due to their high electrochemical stability and low volatility and flammability, unfavorable Lithium-anion clusters lead to poor Li+ transport properties such as low transference numbers. A confinement of ILs in nanoporous materials could overcome these problems, based on altered structural and dynamic properties of the confined ILs. We investigate the coordination and the Li+ dynamics in an IL/Li-salt mixture of 1-butyl-1-methylpyrrolidinium bis(trifluormethyl-sulfonyl)imide (Pyr14TFSA) and LiTFSA and reveal in how far the confinement has positive or negative effects on ion clustering in the electrolyte. To this end, the electrolyte is confined in mesoporous silica SBA-15 (pore diameter 8 nm or 4 nm) or the metal-organic framework (MOF) ZIF-8 (pore diameter 1.16 nm). Raman spectra elucidate the Li-anion coordination and the interaction of the ions with the walls. Temperature-dependent 7Li spin relaxation rates, analyzed within the model of Bloembergen, Purcell and Pound (BPP), allow statements on the local Li+ environment, the local Li+ dynamics and its activation. In the SBA-15 materials the Li+ coordination is unchanged with persisting Li-TFSA clusters. Furthermore, the local dynamics of Li+ is reduced upon confinement, as expected due to geometrical restrictions. At the same time, however, both structural and dynamic parameters do not show a pronounced dependence on the pore size. Surprisingly, upon confinement in ZIF-8 Li+ displays faster local dynamics and a more asymmetric environment in comparison to the bulk electrolyte. The enhanced dynamics is accompanied by a reduced coordination to TFSA-, suggesting the breakup of Li-TFSA clusters. Differences between the porous materials are attributed to the nature of the wall surface, as Raman spectra suggest that in SBA-15 the TFSA- ion is preferentially interacting with the pore walls, whereas in ZIF-8 the Pyr14+ ion is immobilized by the pore walls. These results demonstrate a strong influence of internal interfaces on IL structure and dynamics and bear potential for further tailoring ion dynamics.
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Affiliation(s)
- Janis Hessling
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, D-48149 Münster, Germany.
| | - Martin Lange
- Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstraße 28/30, D-48149 Münster, Germany
| | - Monika Schönhoff
- Institute of Physical Chemistry, University of Münster, Corrensstraße 28/30, D-48149 Münster, Germany.
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Dumont R, Dowdell J, Song J, Li J, Wang S, Kang W, Li B. Control of charge transport in electronically active systems towards integrated biomolecular circuits (IbC). J Mater Chem B 2023; 11:8302-8314. [PMID: 37464922 DOI: 10.1039/d3tb00701d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
The miniaturization of traditional silicon-based electronics will soon reach its limitation as quantum tunneling and heat become serious problems at the several-nanometer scale. Crafting integrated circuits via self-assembly of electronically active molecules using a "bottom-up" paradigm provides a potential solution to these technological challenges. In particular, integrated biomolecular circuits (IbC) offer promising advantages to achieve this goal, as nature offers countless examples of functionalities entailed by self-assembly and examples of controlling charge transport at the molecular level within the self-assembled structures. To this end, the review summarizes the progress in understanding how charge transport is regulated in biosystems and the key redox-active amino acids that enable the charge transport. In addition, charge transport mechanisms at different length scales are also reviewed, offering key insights for controlling charge transport in IbC in the future.
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Affiliation(s)
- Ryan Dumont
- Department of Mechanical Engineering, Kennesaw State University, Marietta, GA, USA.
| | - Juwaan Dowdell
- Department of Mechanical Engineering, Kennesaw State University, Marietta, GA, USA.
| | - Jisoo Song
- Department of Mechanical Engineering, Kennesaw State University, Marietta, GA, USA.
| | - Jiani Li
- State Key Laboratory of Fine Chemicals, Frontiers Science Centre for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, China.
| | - Suwan Wang
- State Key Laboratory of Fine Chemicals, Frontiers Science Centre for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, China.
| | - Wei Kang
- State Key Laboratory of Fine Chemicals, Frontiers Science Centre for Smart Materials Oriented Chemical Engineering, School of Bioengineering, Dalian University of Technology, Dalian, China.
- Ningbo Institute of Dalian University of Technology, Ningbo, China
| | - Bo Li
- Department of Mechanical Engineering, Kennesaw State University, Marietta, GA, USA.
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6
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Dong Y, Steinhart M, Butt HJ, Floudas G. Conductivity of Ionic Liquids In the Bulk and during Infiltration in Nanopores. J Phys Chem B 2023; 127:6958-6968. [PMID: 37499259 DOI: 10.1021/acs.jpcb.3c01216] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
The conductivity of ionic liquids (ILs) in nanopores is essential when considering their application as materials for energy. However, no consensus has been reached about the influence of confinement on the mobility of the ions. A series of ILs bearing the same cation, 1-butyl-3-methylimidazolium ([BMIM]+), and six different anions ([Cl]-, [Br]-, [I]-, [BF4]-, [PF6]-, and [TFSI]-) with radii from 0.168 to 0.326 nm were investigated with respect to their self-assembly, the thermodynamics, and the ionic conductivity in the bulk, during flow and under confinement in cylindrical nanopores with sizes in the range from 400 to 25 nm. In the bulk, the [BMIM]+[X]- exhibits weak ordering as a result of cation-anion correlations (charge alteration peak), and nanophase separation of polar/apolar groups. Liquid-to-glass temperatures were found to differ by ∼50 K, their viscosities by a factor of ∼270, and their conductivities by a factor of 24 (all at a temperature of 303 K). Electrostatic interactions were largely responsible for variations in the glass temperature, the viscosity, and the conductivity. Confined ILs behave differently from the bulk. The majority of ILs in the bulk were prone to crystallization during heating but were unable to crystallize in the smaller pores. Changes in dc-conductivity were used as markers of the phase state. This allowed the construction of the effective phase diagrams under confinement. The ILs penetrate the pores with an effective viscosity of the order of their viscosity in their bulk state. However, within the pores the dc-conductivity was reduced relative to bulk, indicating the immobilization of ions at the pore walls. Hydrophobization of the pore walls by hexamethyldisilazane could partially restore the conductivity. ILs are model systems where the phase state and ion mobility can be controlled by confinement.
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Affiliation(s)
- Yun Dong
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Martin Steinhart
- Institut für Chemie neuer Materialien, Universität Osnabrück, D-49069 Osnabrück, Germany
| | - Hans-Jürgen Butt
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
| | - George Floudas
- Max Planck Institute for Polymer Research, 55128 Mainz, Germany
- Department of Physics, University of Ioannina, 45110 Ioannina, Greece
- Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), 45110 Ioannina, Greece
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7
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Lishchuk P, Vashchuk A, Rogalsky S, Chepela L, Borovyi M, Lacroix D, Isaiev M. Thermal transport properties of porous silicon filled by ionic liquid nanocomposite system. Sci Rep 2023; 13:5889. [PMID: 37041312 PMCID: PMC10090056 DOI: 10.1038/s41598-023-32834-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 04/03/2023] [Indexed: 04/13/2023] Open
Abstract
This paper investigates thermal transport in a nanocomposite system consisting of a porous silicon matrix filled with ionic liquid. Firstly, the thermal conductivity and heat capacity of two imidazolium and one ammonium ionic liquids were evaluated using the photoacoustic approach in piezoelectric configuration and differential scanning calorimetry, respectively. Then, the thermal transport properties of the composite system "ionic liquid confined inside porous silicon matrix" were investigated with the photoacoustic approach in gas-microphone configuration. The results demonstrated a significant enhancement of the thermal conductivity of the composite system when compared to the individual components, i.e. (i) more than two times for pristine porous silicon and (ii) more than eight times for ionic liquids. These results provide new paths for innovative solutions in the field of thermal management, particularly in the development of highly efficient energy storage devices.
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Affiliation(s)
- Pavlo Lishchuk
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Street, Kyiv, 01601, Ukraine.
| | - Alina Vashchuk
- E.O. Paton Electric Welding Institute of NAS of Ukraine, 11 Kazymyra Malevycha, Kyiv, 03680, Ukraine
- Groupe de Physique Des Materiaux, UNIROUEN Normandie, INSA Rouen, CNRS, 76000, Rouen, France
| | - Sergiy Rogalsky
- V. P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of National Academy of Science of Ukraine, 50, Kharkivske Schose, Kyiv, 02160, Ukraine
| | - Lesia Chepela
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Street, Kyiv, 01601, Ukraine
| | - Mykola Borovyi
- Faculty of Physics, Taras Shevchenko National University of Kyiv, 64 Volodymyrska Street, Kyiv, 01601, Ukraine
| | - David Lacroix
- Université de Lorraine, CNRS, LEMTA, 54000, Nancy, France
| | - Mykola Isaiev
- Université de Lorraine, CNRS, LEMTA, 54000, Nancy, France
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Long Z, Tuckerman ME. Hydroxide Diffusion in Functionalized Cylindrical Nanopores as Idealized Models of Anion Exchange Membrane Environments: An Ab Initio Molecular Dynamics Study. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2023; 127:2792-2804. [PMID: 36968146 PMCID: PMC10034739 DOI: 10.1021/acs.jpcc.2c05747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 12/28/2022] [Indexed: 06/18/2023]
Abstract
Anion exchange membranes (AEMs) have attracted significant interest for their applications in fuel cells and other electrochemical devices in recent years. Understanding water distributions and hydroxide transport mechanisms within AEMs is critical to improving their performance as concerns hydroxide conductivity. Recently, nanoconfined environments have been used to mimic AEM environments. Following this approach, we construct nanoconfined cylindrical pore structures using graphane nanotubes (GNs) functionalized with trimethylammonium cations as models of local AEM morphology. These structures were then used to investigate hydroxide transport using ab initio molecular dynamics (AIMD). The simulations showed that hydroxide transport is suppressed in these confined environments relative to the bulk solution although the mechanism is dominated by structural diffusion. One factor causing the suppressed hydroxide transport is the reduced proton transfer (PT) rates due to changes in hydroxide and water solvation patterns under confinement compared to bulk solution as well as strong interactions between hydroxide ions and the tethered cation groups.
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Affiliation(s)
- Zhuoran Long
- Department
of Chemistry, New York University, New York, New York10003, United States
| | - Mark E. Tuckerman
- Department
of Chemistry, New York University, New York, New York10003, United States
- Courant
Institute of Mathematical Science, New York
University, New York, New York10012, United States
- NYU-ECNU
Center for Computational Chemistry at NYU Shanghai, 3663 Zhongshan Road North, Shanghai200062, China
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9
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Minecka A, Tarnacka M, Soszka N, Hachuła B, Kamiński K, Kamińska E. Studying the Intermolecular Interactions, Structural Dynamics, and Non-Equilibrium Kinetics of Cilnidipine Infiltrated into Alumina and Silica Pores. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:533-544. [PMID: 36575053 DOI: 10.1021/acs.langmuir.2c02816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In the present study, the behavior of the calcium channel blocker cilnidipine (CLN) infiltrated into silica (SiO2) and anodic aluminum oxide (AAO) porous membranes characterized by a similar pore size (d = 8 nm and d = 10 nm, respectively) as well as the bulk sample has been investigated using differential scanning calorimetry, broadband dielectric spectroscopy (BDS), and Fourier-transform infrared spectroscopy (FTIR) techniques. The obtained data suggested the existence of two sets of CLN molecules in both confined systems (core and interfacial). They also revealed the lack of substantial differences in inter- and intramolecular dynamics of nanospatially restricted samples independently of the applied porous membranes. Moreover, the annealing experiments (isothermal time-dependent measurements) performed on the confined CLN clearly indicated that the whole equilibration process under confinement is governed by structural relaxation. It was also found that the βanneal parameters obtained from BDS and FTIR data upon equilibration of both confined samples are comparable (within 10%) to each other, while the equilibration constants are significantly different. This finding strongly emphasizes that there is a close connection between the inter- and intramolecular dynamics under nanospatial restriction.
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Affiliation(s)
- Aldona Minecka
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, 41-200Sosnowiec, Poland
| | - Magdalena Tarnacka
- A. Chelkowski Institute of Physics, University of Silesia in Katowice, 41-500Chorzow, Poland
| | - Natalia Soszka
- Institute of Chemistry, University of Silesia, 40-006Katowice, Poland
| | - Barbara Hachuła
- Institute of Chemistry, University of Silesia, 40-006Katowice, Poland
| | - Kamil Kamiński
- A. Chelkowski Institute of Physics, University of Silesia in Katowice, 41-500Chorzow, Poland
| | - Ewa Kamińska
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, 41-200Sosnowiec, Poland
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Li H, Wang J, Warr GG, Atkin R. Extremely slow dynamics of ionic liquid self-assembled nanostructures near a solid surface. J Colloid Interface Sci 2023; 630:658-665. [DOI: 10.1016/j.jcis.2022.10.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 09/20/2022] [Accepted: 10/23/2022] [Indexed: 11/06/2022]
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Sugama T, Pyatina T. Thermally Insulating, Thermal Shock Resistant Calcium Aluminate Phosphate Cement Composites for Reservoir Thermal Energy Storage. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6328. [PMID: 36143639 PMCID: PMC9503598 DOI: 10.3390/ma15186328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 06/16/2023]
Abstract
This paper presents the use of hydrophobic silica aerogel (HSA) and hydrophilic fly ash cenosphere (FCS) aggregates for improvements in the thermal insulating and mechanical properties of 100- and 250 °C-autoclaved calcium aluminate phosphate (CaP) cement composites reinforced with micro-glass (MGF) and micro-carbon (MCF) fibers for deployment in medium- (100 °C) and high-temperature (250 °C) reservoir thermal energy storage systems. The following six factors were assessed: (1) Hydrothermal stability of HSA; (2) Pozzolanic activity of the two aggregates and MGF in an alkali cement environment; (3) CaP cement slurry heat release during hydration and chemical reactions; (4) Composite phase compositions and phase transitions; (5) Mechanical behavior; (6) Thermal shock (TS) resistance at temperature gradients of 150 and 225 °C. The results showed that hydrophobic trimethylsilyl groups in trimethylsiloxy-linked silica aerogel structure were susceptible to hydrothermal degradation at 250 °C. This degradation was followed by pozzolanic reactions (PR) of HSA, its dissolution, and the formation of a porous microstructure that caused a major loss in the compressive strength of the composites at 250 °C. The pozzolanic activities of FCS and MGF were moderate, and they offered improved interfacial bonding at cement-FCS and cement-MGF joints through a bridging effect by PR products. Despite the PR of MGF, both MGF and MCF played an essential role in minimizing the considerable losses in compressive strength, particularly in toughness, engendered by incorporating weak HSA. As a result, a FCS/HSA ratio of 90/10 in the CaP composite system was identified as the most effective hybrid insulating aggregate composition, with a persistent compressive strength of more than 7 MPa after three TS tests at a 150 °C temperature gradient. This composite displayed thermal conductivity of 0.28 and 0.35 W/mK after TS with 225 and 150 °C thermal gradients, respectively. These values, below the TC of water (TC water = 0.6 W/mK), were measured under water-saturated conditions for applications in underground reservoirs. However, considering the hydrothermal disintegration of HSA at 250 °C, these CaP composites have potential applications for use in thermally insulating, thermal shock-resistant well cement in a mid-temperature range (100 to 175 °C) reservoir thermal energy storage system.
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12
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He Y, Khan MA, Drake AD, Ladipo F, Rankin SE, Knutson BL. Nanoconfinement Effects on the Transport of Redox Probes in Ionic Liquid-Loaded Mesoporous Silica Thin Films. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c00236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuxin He
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington 40506, Kentucky, United States
| | - M. Arif Khan
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington 40506, Kentucky, United States
| | - Andrew D. Drake
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington 40506, Kentucky, United States
| | - Folami Ladipo
- Department of Chemistry, University of Kentucky, 125 Chemistry/Physics Building, Lexington, Kentucky 40506, United States
| | - Stephen E. Rankin
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington 40506, Kentucky, United States
| | - Barbara L. Knutson
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F.P. Anderson Tower, Lexington 40506, Kentucky, United States
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13
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Winkler R, Chat K, Unni AB, Dulski M, Laskowska M, Laskowski L, Adrjanowicz K. Glass Transition Dynamics of Poly(phenylmethylsiloxane) Confined within Alumina Nanopores with Different Atomic Layer Deposition (ALD) Coatings. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roksana Winkler
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Katarzyna Chat
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Aparna Beena Unni
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Mateusz Dulski
- Institute of Materials Engineering, University of Silesia in Katowice, 40-007 Katowice, Poland
| | - Magdalena Laskowska
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
| | - Lukasz Laskowski
- Institute of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
| | - Karolina Adrjanowicz
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
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14
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Winkler R, Tu W, Dulski M, Laskowski L, Adrjanowicz K. Effect of the Surface Polarity, Through Employing Nonpolar Spacer Groups, on the Glass-Transition Dynamics of Poly(phenyl methylsiloxane) Confined in Alumina Nanopores. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c02145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Roksana Winkler
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, Chorzow 41-500, Poland
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, Chorzow 41-500, Poland
| | - Wenkang Tu
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, Chorzow 41-500, Poland
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, Chorzow 41-500, Poland
| | - Mateusz Dulski
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, Chorzow 41-500, Poland
- Institute of Materials Engineering, University of Silesia, 75 Pulku Piechoty 1a, Chorzow 41-500, Poland
| | - Lukasz Laskowski
- Institute of Nuclear Physics Polish Academy of Sciences, Krakow 31-342, Poland
| | - Karolina Adrjanowicz
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, Chorzow 41-500, Poland
- Silesian Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, Chorzow 41-500, Poland
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15
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Corti HR, Appignanesi GA, Barbosa MC, Bordin JR, Calero C, Camisasca G, Elola MD, Franzese G, Gallo P, Hassanali A, Huang K, Laria D, Menéndez CA, de Oca JMM, Longinotti MP, Rodriguez J, Rovere M, Scherlis D, Szleifer I. Structure and dynamics of nanoconfined water and aqueous solutions. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2021; 44:136. [PMID: 34779954 DOI: 10.1140/epje/s10189-021-00136-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
This review is devoted to discussing recent progress on the structure, thermodynamic, reactivity, and dynamics of water and aqueous systems confined within different types of nanopores, synthetic and biological. Currently, this is a branch of water science that has attracted enormous attention of researchers from different fields interested to extend the understanding of the anomalous properties of bulk water to the nanoscopic domain. From a fundamental perspective, the interactions of water and solutes with a confining surface dramatically modify the liquid's structure and, consequently, both its thermodynamical and dynamical behaviors, breaking the validity of the classical thermodynamic and phenomenological description of the transport properties of aqueous systems. Additionally, man-made nanopores and porous materials have emerged as promising solutions to challenging problems such as water purification, biosensing, nanofluidic logic and gating, and energy storage and conversion, while aquaporin, ion channels, and nuclear pore complex nanopores regulate many biological functions such as the conduction of water, the generation of action potentials, and the storage of genetic material. In this work, the more recent experimental and molecular simulations advances in this exciting and rapidly evolving field will be reported and critically discussed.
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Affiliation(s)
- Horacio R Corti
- Departmento de Física de la Materia Condensada & Instituto de Nanociencia y Nanotecnología (CNEA-CONICET), Comisión Nacional de Energía Atómica, B1650LWP, Buenos Aires, Argentina.
| | - Gustavo A Appignanesi
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, 8000, Bahía Blanca, Argentina
| | - Marcia C Barbosa
- Institute of Physics, Federal University of Rio Grande do Sul, 91501-970, Porto Alegre, Brazil
| | - J Rafael Bordin
- Department of Physics, Institute of Physics and Mathematics, 96050-500, Pelotas, RS, Brazil
| | - Carles Calero
- Secció de Física Estadística i Interdisciplinària - Departament de Física de la Matèria Condensada, Universitat de Barcelona & Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, 08028, Barcelona, Spain
| | - Gaia Camisasca
- Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre, 00146, Roma, Italy
| | - M Dolores Elola
- Departmento de Física de la Materia Condensada & Instituto de Nanociencia y Nanotecnología (CNEA-CONICET), Comisión Nacional de Energía Atómica, B1650LWP, Buenos Aires, Argentina
| | - Giancarlo Franzese
- Secció de Física Estadística i Interdisciplinària - Departament de Física de la Matèria Condensada, Universitat de Barcelona & Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, 08028, Barcelona, Spain
| | - Paola Gallo
- Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre, 00146, Roma, Italy
| | - Ali Hassanali
- Condensed Matter and Statistical Physics Section (CMSP), The International Center for Theoretical Physics (ICTP), Trieste, Italy
| | - Kai Huang
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen, Guangdong, China
| | - Daniel Laria
- Departmento de Física de la Materia Condensada & Instituto de Nanociencia y Nanotecnología (CNEA-CONICET), Comisión Nacional de Energía Atómica, B1650LWP, Buenos Aires, Argentina
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE-CONICET), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Cintia A Menéndez
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, 8000, Bahía Blanca, Argentina
| | - Joan M Montes de Oca
- INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS)-CONICET, 8000, Bahía Blanca, Argentina
| | - M Paula Longinotti
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE-CONICET), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Javier Rodriguez
- Departmento de Física de la Materia Condensada & Instituto de Nanociencia y Nanotecnología (CNEA-CONICET), Comisión Nacional de Energía Atómica, B1650LWP, Buenos Aires, Argentina
- Escuela de Ciencia y Tecnología, Universidad Nacional de General San Martín, San Martín, Buenos Aires, Argentina
| | - Mauro Rovere
- Dipartimento di Matematica e Fisica, Università degli Studi Roma Tre, 00146, Roma, Italy
| | - Damián Scherlis
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE-CONICET), Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Igal Szleifer
- Biomedical Engineering Department, Northwestern University, Evanston, USA
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16
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Scisco GP, Orazem ME, Ziegler KJ, Jones KS. Resistivity of mesopore-confined ionic liquid determined by electrochemical impedance spectroscopy. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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17
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Tarnacka M, Geppert-Rybczyńska M, Dulski M, Grelska J, Jurkiewicz K, Grzybowska K, Kamiński K, Paluch M. Local structure and molecular dynamics of highly polar propylene carbonate derivative infiltrated within alumina and silica porous templates. J Chem Phys 2021; 154:064701. [PMID: 33588559 DOI: 10.1063/5.0040150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Herein, we examined the effect of finite size and wettability on the structural dynamics and the molecular arrangement of the propylene carbonate derivative, (S)-(-)-4-methoxymethyl-1,3-dioxolan-2-one (assigned as s-methoxy-PC), incorporated into alumina and silica porous templates of pore diameters d = 4 nm-10 nm using Raman and broadband dielectric spectroscopy, differential scanning calorimetry, and x-ray diffraction. It was demonstrated that only subtle changes in the molecular organization and short-range order of confined s-methoxy-PC molecules were detected. Yet, a significant deviation of the structural dynamics and depression of the glass transition temperatures, Tg, was found for all confined samples with respect to the bulk material. Interestingly, these changes correlate with neither the finite size effects nor the interfacial energy but seem to vary with wettability, generally. Nevertheless, for s-methoxy-PC infiltrated into native (more hydrophilic) and modified (more hydrophobic) silica templates of the same nanochannel size (d = 4 nm), a change in the dynamics and Tg was negligible despite a significant variation in wettability. These results indicated that although wettability might be a suitable variable to predict alteration of the structural dynamics and depression of the glass transition temperature, other factors, i.e., surface roughness and the density packing, might also have a strong contribution to the observed confinement effects.
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Affiliation(s)
- Magdalena Tarnacka
- Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzow, Poland
| | | | - Mateusz Dulski
- Silesian Center of Education and Interdisciplinary Research, 75 Pułku Piechoty 1A, 41-500 Chorzow, Poland
| | - Joanna Grelska
- Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzow, Poland
| | - Karolina Jurkiewicz
- Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzow, Poland
| | - Katarzyna Grzybowska
- Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzow, Poland
| | - Kamil Kamiński
- Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzow, Poland
| | - Marian Paluch
- Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzow, Poland
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18
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Tu W, Jurkiewicz K, Adrjanowicz K. Confinement of pyrrolidinium-based ionic liquids [CnMPyrr]+[Tf2N]− with long cationic alkyl side chains (n = 10 and 16) to nanoscale pores: Dielectric and calorimetric studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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19
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Kinsey T, Glynn K, Cosby T, Iacob C, Sangoro J. Ion Dynamics of Monomeric Ionic Liquids Polymerized In Situ within Silica Nanopores. ACS APPLIED MATERIALS & INTERFACES 2020; 12:44325-44334. [PMID: 32886472 DOI: 10.1021/acsami.0c12381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Polymerized ionic liquids are a promising class of versatile solid-state electrolytes for applications ranging from electrochemical energy storage to flexible smart materials that remain limited by their relatively low ionic conductivities compared to conventional electrolytes. Here, we show that the in situ polymerization of the vinyl cationic monomer, 1-ethyl-3-vinylimidazolium with the bis(trifluoromethanesulfonyl)imide counteranion, under nanoconfinement within 7.5 ± 1.0 nm diameter nanopores results in a nearly 1000-fold enhancement in the ionic conductivity compared to the material polymerized in bulk. Using insights from broadband dielectric and Raman spectroscopic techniques, we attribute these results to the role of confinement on molecular conformations, ion coordination, and subsequently the ionic conductivity in the polymerized ionic liquid. These results contribute to the understanding of the dynamics of nanoconfined molecules and show that in situ polymerization under nanoscale geometric confinement is a promising path toward enhancing ion conductivity in polymer electrolytes.
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Affiliation(s)
- Thomas Kinsey
- The Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Knoxville, Tennessee 37916, United States
| | - Kaitlin Glynn
- The Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Knoxville, Tennessee 37916, United States
| | - Tyler Cosby
- Department of Chemistry, US Naval Academy, Annapolis, Maryland 21402, United States
| | - Ciprian Iacob
- National Research and Development Institute for Cryogenic and Isotopic Technologies, ICSI Rm, Valcea, Romania 240050
- Karlsruhe Institute of Technology (KIT), Institute for Chemical Technology and Polymer Chemistry, Karlsruhe, Germany 76128
| | - Joshua Sangoro
- The Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Knoxville, Tennessee 37916, United States
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20
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Talik A, Tarnacka M, Geppert-Rybczyńska M, Hachuła B, Bernat R, Chrzanowska A, Kaminski K, Paluch M. Are hydrogen supramolecular structures being suppressed upon nanoscale confinement? The case of monohydroxy alcohols. J Colloid Interface Sci 2020; 576:217-229. [PMID: 32417683 DOI: 10.1016/j.jcis.2020.04.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 04/15/2020] [Accepted: 04/20/2020] [Indexed: 11/27/2022]
Abstract
In this paper, the molecular dynamics, H-bonding pattern and wettability of the primary and secondary monohydroxyalcohols, 2-ethyl-1-hexanol (2E1H), 2-ethyl-1-butanol (2E1B) and 5-methyl-3-heptanol (5M3H) infiltrated into native and functionalized silica and alumina pores having pore diameters, d = 4 nm and d = 10 nm, have been studied with the use of Broadband Dielectric (BDS) and Fourier Transform InfraRed (FTIR) spectroscopies, as well as contact angle measurements. We found significant differences in the behavior of alcohols forming chain- (2E1H, 2E1B) or micelle-like (5M3H) supramolecular structures despite of their similarities in the wettability and interfacial energy. It turned out that nanoassociates as well as H-bonds are more or less affected by the confinement dependently on the chemical structure and alcohol order. Moreover, a peculiar behavior of the self-assemblies at the interface was noted in the latter material (5M3H). Finally, it was found that irrespectively to the sample, type of pores, functionalization, the temperature evolution of Debye relaxation times, τD, of the confined systems deviates from the bulk behavior always at similar τD due to vitrification of the interfacial layer. This finding is a clear indication that unexpectedly dynamics (mobility) of the supramolecular structures close to the hydrophilic and hydrophobic surfaces is similar in each system.
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Affiliation(s)
- Agnieszka Talik
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland; Silesian Center of Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland.
| | - Magdalena Tarnacka
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland; Silesian Center of Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | | | - Barbara Hachuła
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
| | - Roksana Bernat
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
| | - Agnieszka Chrzanowska
- Department of Physical Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, M. Curie-Sklodowska Sq. 3, 20-031, Lublin, Poland
| | - Kamil Kaminski
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland; Silesian Center of Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland.
| | - Marian Paluch
- Institute of Physics, University of Silesia in Katowice, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland; Silesian Center of Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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21
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Chat K, Tu W, Beena Unni A, Geppert-Rybczyńska M, Adrjanowicz K. Study on the glass transition dynamics and crystallization kinetics of molecular liquid, dimethyl phthalate, confined in Anodized Aluminum Oxide (AAO) nanopores with Atomic Layer Deposition (ALD) coatings. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113296] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Self-diffusion in ionic liquids with nitrate anion: Effects of confinement between glass plates and static magnetic field. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113404] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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23
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Wang YL, Li B, Sarman S, Mocci F, Lu ZY, Yuan J, Laaksonen A, Fayer MD. Microstructural and Dynamical Heterogeneities in Ionic Liquids. Chem Rev 2020; 120:5798-5877. [PMID: 32292036 PMCID: PMC7349628 DOI: 10.1021/acs.chemrev.9b00693] [Citation(s) in RCA: 192] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Indexed: 12/11/2022]
Abstract
Ionic liquids (ILs) are a special category of molten salts solely composed of ions with varied molecular symmetry and charge delocalization. The versatility in combining varied cation-anion moieties and in functionalizing ions with different atoms and molecular groups contributes to their peculiar interactions ranging from weak isotropic associations to strong, specific, and anisotropic forces. A delicate interplay among intra- and intermolecular interactions facilitates the formation of heterogeneous microstructures and liquid morphologies, which further contributes to their striking dynamical properties. Microstructural and dynamical heterogeneities of ILs lead to their multifaceted properties described by an inherent designer feature, which makes ILs important candidates for novel solvents, electrolytes, and functional materials in academia and industrial applications. Due to a massive number of combinations of ion pairs with ion species having distinct molecular structures and IL mixtures containing varied molecular solvents, a comprehensive understanding of their hierarchical structural and dynamical quantities is of great significance for a rational selection of ILs with appropriate properties and thereafter advancing their macroscopic functionalities in applications. In this review, we comprehensively trace recent advances in understanding delicate interplay of strong and weak interactions that underpin their complex phase behaviors with a particular emphasis on understanding heterogeneous microstructures and dynamics of ILs in bulk liquids, in mixtures with cosolvents, and in interfacial regions.
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Affiliation(s)
- Yong-Lei Wang
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Bin Li
- School
of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, P. R. China
| | - Sten Sarman
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Francesca Mocci
- Department
of Chemical and Geological Sciences, University
of Cagliari, I-09042 Monserrato, Italy
| | - Zhong-Yuan Lu
- State
Key Laboratory of Supramolecular Structure and Materials, Institute
of Theoretical Chemistry, Jilin University, Changchun 130021, P. R. China
| | - Jiayin Yuan
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Aatto Laaksonen
- Department
of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
- State
Key Laboratory of Materials-Oriented and Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
- Centre of
Advanced Research in Bionanoconjugates and Biopolymers, Petru Poni Institute of Macromolecular Chemistry Aleea Grigore Ghica-Voda, 41A, 700487 Iasi, Romania
- Department
of Engineering Sciences and Mathematics, Division of Energy Science, Luleå University of Technology, SE-97187 Luleå, Sweden
| | - Michael D. Fayer
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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24
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Winkler R, Tu W, Laskowski L, Adrjanowicz K. Effect of Surface Chemistry on the Glass-Transition Dynamics of Poly(phenyl methyl siloxane) Confined in Alumina Nanopores. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:7553-7565. [PMID: 32515976 PMCID: PMC7588132 DOI: 10.1021/acs.langmuir.0c01194] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/02/2020] [Indexed: 06/11/2023]
Abstract
Broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC) are combined to study the effect of changes in the surface chemistry on the segmental dynamics of glass-forming polymer, poly(methylphenylsiloxane) (PMPS), confined in anodized aluminum oxide (AAO) nanopores. Measurements were carried for native and silanized nanopores of the same pore sizes. Nanopore surfaces are modified with the use of two silanizing agents, chlorotrimethylsilane (ClTMS) and (3-aminopropyl)trimethoxysilane (APTMOS), of much different properties. The results of the dielectric studies have demonstrated that for the studied polymer located in 55 nm pores, changes in the surface chemistry and thermal treatment allows the confinement effect seen in temperature evolution of the segmental relaxation time, τα(T) to be removed. The bulk-like evolution of the segmental relaxation time can also be restored upon long-time annealing. Interestingly, the time scale of such equilibration process was found to be independent of the surface conditions. The calorimetric measurements reveal the presence of two glass-transition events in DSC thermograms of all considered systems, implying that the changes in the interfacial interactions introduced by silanization are not strong enough to inhibit the formation of the interfacial layer. Although DSC traces confirmed the two-glass-transition scenario, there is no clear evidence that vitrification of the interfacial layer affects τα(T) for nanopore-confined polymer.
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Affiliation(s)
- Roksana Winkler
- Institute
of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian
Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Wenkang Tu
- Institute
of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian
Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Lukasz Laskowski
- Institute
of Nuclear Physics, Polish Academy of Sciences, 31-342 Krakow, Poland
| | - Karolina Adrjanowicz
- Institute
of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian
Center for Education and Interdisciplinary Research (SMCEBI), 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
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25
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He Y, Saang’onyo D, Ladipo F, Knutson BL, Rankin SE. In Situ Fourier Transform Infrared Study of the Effects of Silica Mesopore Confinement on Hydration of Ionic Liquid 1-Butyl-3-methylimidazolium Chloride. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Filippov A, Antzutkin ON, Shah FU. Rapid carbene formation increases ion diffusivity in an imidazolium acetate ionic liquid confined between polar glass plates. Phys Chem Chem Phys 2019; 21:22531-22538. [PMID: 31588443 DOI: 10.1039/c9cp04504j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1-Ethyl-3-methyl-imidazolium acetate ([EMIM][OAc]) is one of the most widely used ionic liquids for various applications. This study is focussed on the chemical stability of [EMIM][OAc] on the surfaces of polar glass plates. 1H and 13C NMR spectroscopy and NMR diffusometry of [EMIM][OAc] IL confined between glass plates with a specific surface area 105-106 m-1 are thoroughly investigated. A rapid and spontaneous reaction took place on the surfaces of glass plates leading to the formation of neutral chemical moieties as evident by the appearance of new signals in the 1H NMR spectra. These new products are assigned as N-heterocyclic carbene (NHC) and acetic acid. These neutral chemical moieties have significantly increased the ion diffusivity by dissociation of the cation and the anion in [EMIM][OAc] IL. The yield and rate of formation of NHC and acetic acid are found to increase with the increasing surface area of polar glass plates and the time of contact between the IL and glass surfaces. Based on NMR spectroscopy, a dissociative reaction mechanism is proposed for the formation of free NHC in the neat [EMIM][OAc] IL.
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Affiliation(s)
- Andrei Filippov
- Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden. and Kazan State Medical University, 420012 Kazan, Russia
| | - Oleg N Antzutkin
- Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden. and Department of Physics, Warwick University, Coventry CV4 7AL, UK
| | - Faiz Ullah Shah
- Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden.
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27
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Ordikhani Seyedlar A, Stapf S, Mattea C. Nuclear magnetic relaxation and diffusion study of the ionic liquids 1-ethyl- and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide confined in porous glass. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2019; 57:818-828. [PMID: 30770585 DOI: 10.1002/mrc.4852] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 02/08/2019] [Accepted: 02/11/2019] [Indexed: 05/23/2023]
Abstract
The molecular dynamics of the room-temperature ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (Bmim Tf2N) confined in porous glass is studied by nuclear magnetic resonance (NMR) relaxometry and diffusometry and is compared with the bulk dynamics over a wide temperature range. The molecular reorientation processes for anions and cations alike are found to be significantly affected by the presence of the glass interface at high temperatures. In this respect, the ionic liquid behaves similarly to polar liquids where proton NMR relaxation is governed by reorientations mediated by translational displacements (RMTDs). This process becomes less significant towards lower temperatures when the characteristic translational correlation times of the ions approach a timescale comparable with those of the RMTD process, and the relaxation dispersions in bulk and in confinement become similar below a temperature corresponding to about 1.2Tg , a value where the onset of dynamic heterogeneity has been observed before. The self-diffusion coefficient, on the other hand, is found to be strongly reduced than the bulk within the accessible temperature range of 248 K and above and is significantly slower than expected from the tortuosity effect, suggesting that ion-surface interactions affect the macroscopic properties.
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Affiliation(s)
- Amin Ordikhani Seyedlar
- Department of Technical Physics II, Institute of Physics, Technische Universität Ilmenau, Ilmenau, Germany
| | - Siegfried Stapf
- Department of Technical Physics II, Institute of Physics, Technische Universität Ilmenau, Ilmenau, Germany
| | - Carlos Mattea
- Department of Technical Physics II, Institute of Physics, Technische Universität Ilmenau, Ilmenau, Germany
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28
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Elverfeldt CP, Lee YJ, Fröba M. Selective Control of Ion Transport by Nanoconfinement: Ionic Liquid in Mesoporous Resorcinol-Formaldehyde Monolith. ACS APPLIED MATERIALS & INTERFACES 2019; 11:24423-24434. [PMID: 31188560 DOI: 10.1021/acsami.9b06445] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Thermal and dynamic properties of ionic liquid (IL)-based electrolytic solution (Li+TFSI- in Pyr13+TFSI-; 1-methyl-1-propylpyrrolidinium bis(trifluoromethylsulfonyl)imide = Pyr13+TFSI-) confined in nanoporous polymer hosts were investigated with respect to the pore size/porosity and the surface chemistry of the polymer host. As host material, mesoporous resorcinol-formaldehyde (RF) polymer monoliths with three-dimensionally connected pore structure were prepared, with precise control of the pore size ranging from ca. 7 to 60 nm. Thermal analysis of RF polymer-ionic liquid composites showed stability up to almost 400 °C and a melting point depression proportional to the inverse of the pore diameter. Good ionic conductivity comparable to that of a commercial separator is obtained, which is dependent on the porosity (i.e., pore volume) of the confining host material (i.e., the number of charge carriers available in the system). Further pulsed field gradient (PFG) NMR experiments revealed that the diffusion coefficient of Pyr13+ cation becomes smaller than that of TFSI- anion inside RF pores, which is contradictory to the bulk IL system. This change in the ionic motion is due to electrostatic attraction between the pore walls and Pyr13+ cations, resulting in a layer structure composed of a Pyr13+ cation-rich layer adsorbed at the pore wall surface and a TFSI- anion-enriched bulklike layer at the pore center. Our study suggests that transport characteristics of the ions of interest can be controlled by optimizing the surface chemistry of the host framework and their motion can be separately monitored by PFG NMR spectroscopy.
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Affiliation(s)
- Carl-Philipp Elverfeldt
- Institute of Inorganic and Applied Chemistry , University of Hamburg , Martin-Luther-King-Platz 6 , 20146 Hamburg , Germany
| | - Young Joo Lee
- Institute of Inorganic and Applied Chemistry , University of Hamburg , Martin-Luther-King-Platz 6 , 20146 Hamburg , Germany
| | - Michael Fröba
- Institute of Inorganic and Applied Chemistry , University of Hamburg , Martin-Luther-King-Platz 6 , 20146 Hamburg , Germany
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29
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Filippov A, Gnezdilov OI, Luchkin AG, Antzutkin ON. Self-diffusion of ethylammonium nitrate ionic liquid confined between modified polar glasses. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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30
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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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31
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Kipnusu WK, Elmahdy MM, Elsayed M, Krause-Rehberg R, Kremer F. Counterbalance between Surface and Confinement Effects As Studied for Amino-Terminated Poly(propylene glycol) Constraint in Silica Nanopores. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02687] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Wycliffe K. Kipnusu
- GROC.UJI, Institute of New Imaging Technologies, Universitat Jaume I, Avda. Sos Baynat s/n, 12071 Castellón, Spain
| | - Mahdy M. Elmahdy
- Department of Physics, Faculty of Science, Mansoura University, 35516 Mansoura, Egypt
| | - Mohamed Elsayed
- Department of Physics, Martin Luther University Halle, 06099 Halle, Germany
- Department of Physics, Faculty of Science, Minia University, 61519 Minia, Egypt
| | | | - Friedrich Kremer
- Peter-Debye-Institute, University of Leipzig, Linnéstraße 5, 04103 Leipzig, Germany
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32
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Jasiurkowska-Delaporte M, Kossack W, Kipnusu WK, Sangoro JR, Iacob C, Kremer F. Glassy dynamics of two poly(ethylene glycol) derivatives in the bulk and in nanometric confinement as reflected in its inter- and intra-molecular interactions. J Chem Phys 2018; 149:064501. [PMID: 30111133 DOI: 10.1063/1.5039518] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The inter- and intra-molecular interactions as they evolve in the course of glassy solidification are studied by broadband dielectric-and Fourier-transform infrared-spectroscopy for oligomeric derivatives of poly(ethylene glycol) derivatives, namely, poly(ethylene glycol) phenyl ether acrylate and poly(ethylene glycol) dibenzoate in the bulk and under confinement in nanoporous silica having mean pore diameters 4, 6, and 8 nm, with native and silanized inner surfaces. Analyzing the spectral positions and the oscillator strengths of specific IR absorption bands and their temperature dependencies enables one to trace the changes in the intra-molecular potentials and to compare it with the dielectrically determined primarily inter-molecular dynamics. Special emphasis is given to the calorimetric glass transition temperature Tg and Tαβ ≈ 1.25Tg, where characteristic changes in conformation appear, and the secondary β-relaxation merges with the dynamic glass transition (α-relaxation). Furthermore, the impact of main chain conformations, inter- and intra-molecular hydrogen bonding, and nanometric confinement on the dynamic glass transition is unraveled.
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Affiliation(s)
| | - Wilhelm Kossack
- Institute of Experimental Physics I, University of Leipzig, Linnéstr. 5, Leipzig, Germany
| | - Wycliffe K Kipnusu
- GROC·UJI, Institute of New Imaging Technologies, Universitat Jaume I, Avda. Sos Baynat s/n, 12071 Castellón, Spain
| | - Joshua R Sangoro
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Ciprian Iacob
- Department of Materials Science and Engineering, Penn State University, University Park, Pennsylvania 16802, USA
| | - Friedrich Kremer
- Institute of Experimental Physics I, University of Leipzig, Linnéstr. 5, Leipzig, Germany
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33
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Talik A, Tarnacka M, Grudzka-Flak I, Maksym P, Geppert-Rybczynska M, Wolnica K, Kaminska E, Kaminski K, Paluch M. The Role of Interfacial Energy and Specific Interactions on the Behavior of Poly(propylene glycol) Derivatives under 2D Confinement. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00658] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Agnieszka Talik
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Magdalena Tarnacka
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Iwona Grudzka-Flak
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - Paulina Maksym
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | | | - Kamila Wolnica
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
| | - 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
| | - Kamil Kaminski
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
| | - Marian Paluch
- Institute of Physics, University of Silesia, 75 Pulku Piechoty 1, 41-500 Chorzow, Poland
- Silesian Center of Education and Interdisciplinary Research, University of Silesia, 75 Pulku Piechoty 1A, 41-500 Chorzow, Poland
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34
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Filippov A, Antzutkin ON. Magnetic field effects dynamics of ethylammonium nitrate ionic liquid confined between glass plates. Phys Chem Chem Phys 2018; 20:6316-6320. [DOI: 10.1039/c7cp06554j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diffusion and NMR relaxation in ethylammonium nitrate confined between polar glass plates reversibly altered by application of a static magnetic field.
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Affiliation(s)
- Andrei Filippov
- Chemistry of Interfaces, Luleå University of Technology
- SE-97187 Luleå
- Sweden
- Institute of Physics
- Kazan Federal University
| | - Oleg N. Antzutkin
- Chemistry of Interfaces, Luleå University of Technology
- SE-97187 Luleå
- Sweden
- Department of Physics
- Warwick University
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35
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Filippov A, Gnezdilov OI, Hjalmarsson N, Antzutkin ON, Glavatskih S, Furó I, Rutland MW. Acceleration of diffusion in ethylammonium nitrate ionic liquid confined between parallel glass plates. Phys Chem Chem Phys 2017; 19:25853-25858. [PMID: 28932828 DOI: 10.1039/c7cp01772c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Diffusion of EAN confined between polar glass plates separated by a few micrometers is higher by a factor of ca. 2 as compared to bulk values. Formation of a new phase, different to the bulk, was suggested.
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Affiliation(s)
- Andrei Filippov
- Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden. and Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
| | - Oleg I Gnezdilov
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
| | - Nicklas Hjalmarsson
- Surface and Corrosion Science, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Oleg N Antzutkin
- Chemistry of Interfaces, Luleå University of Technology, SE-97187 Luleå, Sweden.
| | - Sergei Glavatskih
- System and Component Design, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden and Department of Mechanical Construction and Production, Ghent University, B-9000 Ghent, Belgium
| | - István Furó
- Applied Physical Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
| | - Mark W Rutland
- Surface and Corrosion Science, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden and RISE Technical Research Institute of Sweden, Chemistry Materials and Surfaces, Box 5607, SE-11486 Stockholm, Sweden
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36
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Shin JY, Yamada SA, Fayer MD. Carbon Dioxide in a Supported Ionic Liquid Membrane: Structural and Rotational Dynamics Measured with 2D IR and Pump–Probe Experiments. J Am Chem Soc 2017; 139:11222-11232. [DOI: 10.1021/jacs.7b05759] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jae Yoon Shin
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Steven A. Yamada
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Michael D. Fayer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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37
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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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38
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Binet C, Allart A, Judeinstein P, Roussel F. Anisotropic charge transport in ion-conductive photoresponsive polyethylene oxide-based mesomorphic materials. Phys Rev E 2017; 95:012708. [PMID: 28208449 DOI: 10.1103/physreve.95.012708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Indexed: 11/07/2022]
Abstract
The mechanism of charge motion in conductive and photosensitive mesogenic block copolymers containing polyethylene oxide (PEO) segments is investigated over a wide frequency and temperature range with the broadband dielectric spectroscopy technique. It is found that the ultraviolet (UV) irradiation, the UV intensity, and the anchoring conditions of mesogenic unit in the cells produce changes in conductivity properties and in the molecular arrangement. The anisotropic nature of the conductivity is established.
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Affiliation(s)
- Corinne Binet
- Université de Lille-Sciences et Techniques, Unité Matériaux et Transformations (UMET), CNRS, UMR 8207, UFR de Physique, P5, 59655 Villeneuve d'Ascq Cedex, France
| | - Alexandre Allart
- Université de Lille-Sciences et Techniques, Unité Matériaux et Transformations (UMET), CNRS, UMR 8207, UFR de Physique, P5, 59655 Villeneuve d'Ascq Cedex, France
| | - Patrick Judeinstein
- ICMMO, UMR 8182 CNRS-U. P-Sud, Université Paris-Saclay, Université Paris-Sud, 91405 Orsay Cedex, France.,Laboratoire Léon Brillouin, UMR 12 CNRS-CEA, Université Paris-Saclay, CEA Saclay, 91191 Gif sur Yvette Cedex, France
| | - Frédérick Roussel
- Université de Lille-Sciences et Techniques, Unité Matériaux et Transformations (UMET), CNRS, UMR 8207, UFR de Physique, P5, 59655 Villeneuve d'Ascq Cedex, France
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39
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Kondrashova D, Lauerer A, Mehlhorn D, Jobic H, Feldhoff A, Thommes M, Chakraborty D, Gommes C, Zecevic J, de Jongh P, Bunde A, Kärger J, Valiullin R. Scale-dependent diffusion anisotropy in nanoporous silicon. Sci Rep 2017; 7:40207. [PMID: 28106047 PMCID: PMC5247748 DOI: 10.1038/srep40207] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 12/01/2016] [Indexed: 11/13/2022] Open
Abstract
Nanoporous silicon produced by electrochemical etching of highly B-doped p-type silicon wafers can be prepared with tubular pores imbedded in a silicon matrix. Such materials have found many technological applications and provide a useful model system for studying phase transitions under confinement. This paper reports a joint experimental and simulation study of diffusion in such materials, covering displacements from molecular dimensions up to tens of micrometers with carefully selected probe molecules. In addition to mass transfer through the channels, diffusion (at much smaller rates) is also found to occur in directions perpendicular to the channels, thus providing clear evidence of connectivity. With increasing displacements, propagation in both axial and transversal directions is progressively retarded, suggesting a scale-dependent, hierarchical distribution of transport resistances (“constrictions” in the channels) and of shortcuts (connecting “bridges”) between adjacent channels. The experimental evidence from these studies is confirmed by molecular dynamics (MD) simulation in the range of atomistic displacements and rationalized with a simple model of statistically distributed “constrictions” and “bridges” for displacements in the micrometer range via dynamic Monte Carlo (DMC) simulation. Both ranges are demonstrated to be mutually transferrable by DMC simulations based on the pore space topology determined by electron tomography.
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Affiliation(s)
- Daria Kondrashova
- University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstraße 5, D-04103 Leipzig, Germany.,University of Gießen, Institute of Theoretical Physics, Heinrich-Buff-Ring 16, D-35392 Gießen, Germany
| | - Alexander Lauerer
- University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstraße 5, D-04103 Leipzig, Germany
| | - Dirk Mehlhorn
- University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstraße 5, D-04103 Leipzig, Germany
| | - Hervé Jobic
- Institut de Recherches sur la Catalyse et l'Environnement - CNRS 2, Avenue Albert-Einstein, F-69626 Villeurbanne Cedex, France
| | - Armin Feldhoff
- Leibniz University Hannover, Institute of Physical Chemistry and Electrochemistry, Callinstr. 3-3A, D-30167 Hannover, Germany
| | - Matthias Thommes
- Quantachrome Ins., 1900 Corporate Drive, Boynton Beach, Florida 33426, USA
| | - Dipanjan Chakraborty
- Indian Institute of Science Education &Research Mohali, Sec 81, SAS Nagar, Manauli - 140306, Punjab, India
| | - Cedric Gommes
- Utrecht University, Department of Inorganic Chemistry and Catalysis, Sorbonnelaan 16, NL-3584 CA Utrecht, The Netherlands
| | - Jovana Zecevic
- Utrecht University, Department of Inorganic Chemistry and Catalysis, Sorbonnelaan 16, NL-3584 CA Utrecht, The Netherlands
| | - Petra de Jongh
- Utrecht University, Department of Inorganic Chemistry and Catalysis, Sorbonnelaan 16, NL-3584 CA Utrecht, The Netherlands
| | - Armin Bunde
- University of Gießen, Institute of Theoretical Physics, Heinrich-Buff-Ring 16, D-35392 Gießen, Germany
| | - Jörg Kärger
- University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstraße 5, D-04103 Leipzig, Germany
| | - Rustem Valiullin
- University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstraße 5, D-04103 Leipzig, Germany
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40
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Garaga MN, Aguilera L, Yaghini N, Matic A, Persson M, Martinelli A. Achieving enhanced ionic mobility in nanoporous silica by controlled surface interactions. Phys Chem Chem Phys 2017; 19:5727-5736. [DOI: 10.1039/c6cp07351d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Upon chemical modification of the silica surface the ionic mobility is increased by one order of magnitude inside the nano-pores.
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Affiliation(s)
| | | | - Negin Yaghini
- Department of Chemistry and Chemical Engineering
- 41296 Gothenburg
- Sweden
| | | | | | - Anna Martinelli
- Department of Chemistry and Chemical Engineering
- 41296 Gothenburg
- Sweden
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41
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Kong J, Bo Z, Yang H, Yang J, Shuai X, Yan J, Cen K. Temperature dependence of ion diffusion coefficients in NaCl electrolyte confined within graphene nanochannels. Phys Chem Chem Phys 2017; 19:7678-7688. [DOI: 10.1039/c6cp08752c] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ion diffusion coefficients of NaCl electrolyte confined within graphene nanochannels at different temperatures are investigated using molecular dynamics simulations.
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Affiliation(s)
- Jing Kong
- State Key Laboratory of Clean Energy Utilization
- Institute for Thermal Power Engineering
- College of Energy Engineering
- Zhejiang University
- Hangzhou
| | - Zheng Bo
- State Key Laboratory of Clean Energy Utilization
- Institute for Thermal Power Engineering
- College of Energy Engineering
- Zhejiang University
- Hangzhou
| | - Huachao Yang
- State Key Laboratory of Clean Energy Utilization
- Institute for Thermal Power Engineering
- College of Energy Engineering
- Zhejiang University
- Hangzhou
| | - Jinyuan Yang
- State Key Laboratory of Clean Energy Utilization
- Institute for Thermal Power Engineering
- College of Energy Engineering
- Zhejiang University
- Hangzhou
| | - Xiaorui Shuai
- State Key Laboratory of Clean Energy Utilization
- Institute for Thermal Power Engineering
- College of Energy Engineering
- Zhejiang University
- Hangzhou
| | - Jianhua Yan
- State Key Laboratory of Clean Energy Utilization
- Institute for Thermal Power Engineering
- College of Energy Engineering
- Zhejiang University
- Hangzhou
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization
- Institute for Thermal Power Engineering
- College of Energy Engineering
- Zhejiang University
- Hangzhou
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42
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Affiliation(s)
- Shiguo Zhang
- College
of Materials Science and Engineering, Hunan University, Changsha 410082, China
- Center for Green Chemistry and Catalysis, State Key Laboratory for Oxo Synthesis & Selective Oxidation, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, 730000 Lanzhou, China
| | - Jiaheng Zhang
- School
of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Yan Zhang
- College
of Materials Science and Engineering, Hunan University, Changsha 410082, China
| | - Youquan Deng
- Center for Green Chemistry and Catalysis, State Key Laboratory for Oxo Synthesis & Selective Oxidation, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, No.18, Tianshui Middle Road, 730000 Lanzhou, China
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43
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Tarnacka M, Chrobok A, Matuszek K, Golba S, Maksym P, Kaminski K, Paluch M. Polymerization of Monomeric Ionic Liquid Confined within Uniaxial Alumina Pores as a New Way of Obtaining Materials with Enhanced Conductivity. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29779-29790. [PMID: 27709888 DOI: 10.1021/acsami.6b10666] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Broadband dielectric spectroscopy (BDS) and differential scanning calorimetry (DSC) have been employed to probe dynamics and charge transport of 1-butyl-3-vinylimidazolium bis(trifluoromethanesulfonyl)imide ([bvim][NTf2]) confined in native uniaxial AAO pores as well as to study kinetics of radical polymerization of the examined compound as a function of the degree of confinement. Subsequently, the electronic conductivity of the produced polymers was investigated. As observed, polymerization carried out at T = 363 K proceeds faster under confinement with some saturation effect observed for the sample in pores of smaller diameter. Obtained results were discussed in the context of the very recent reports showing that the free volume of the confined material is higher with respect to the bulk one. It was also noted that conductivity of poly[bvim][NTf2] is significantly higher with respect to the macromolecules obtained upon bulk polymerization. Moreover, charge transport of the confined macromolecules is even higher when compared to the bulk monomeric ionic liquid at some thermodynamic conditions. Additionally, the molecular weight, Mw, of the confined-synthesized polymers is significantly higher with respect to the bulk-synthesized material. Interestingly, both parameters, (i) the enhancement of σdc and (ii) the increase in Mw, can be tuned and controlled by the application of the appropriate confinement. Consequently, those results are quite promising in the context of development of the fabrication of polymerized ionic liquids (PILs) nanomaterials with unique properties and morphologies, which can be further easily applied in the field of nanotechnology.
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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
| | - Anna Chrobok
- Department of Chemical Organic Technology and Petrochemistry, Silesian University of Technology , Krzywoustego 4, 44-100 Gliwice, Poland
| | - Karolina Matuszek
- Department of Chemical Organic Technology and Petrochemistry, Silesian University of Technology , Krzywoustego 4, 44-100 Gliwice, Poland
| | - Sylwia Golba
- Institute of Materials Science, University of Silesia , 75 Pulk Piechoty 1A, 41-500 Chorzow, Poland
| | - Paulina Maksym
- Department of Physical Chemistry and Technology of Polymers, Faculty of Chemistry, Silesian University of Technology , Strzody 9, 44-100 Gliwice, Poland
| | - Kamil Kaminski
- 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
| | - 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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44
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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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45
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Le TS, Ko Y, Do V, Cho WI, Woo K. Redox Properties on the Surfaces of Silica Networks Encapsulating Clusters of Superparamagnetic Magnetite Nanoparticles. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- The Son Le
- Nanophotonics Research CenterKorea Institute of Science and TechnologyP. O. Box 131, Cheongryang130‐650SeoulKorea
- Materials Science and EngineeringUniversity of Science and Technology217 Gajeong‐ro, Yuseong‐gu305‐350DaejeonKorea
| | - Young‐Seon Ko
- Nanophotonics Research CenterKorea Institute of Science and TechnologyP. O. Box 131, Cheongryang130‐650SeoulKorea
| | - Vandung Do
- Materials Science and EngineeringUniversity of Science and Technology217 Gajeong‐ro, Yuseong‐gu305‐350DaejeonKorea
- Center for Energy Convergence ResearchKorea Institute of Science and TechnologyP. O. Box 131, Cheongryang130‐650SeoulKorea
| | - Won Il Cho
- Materials Science and EngineeringUniversity of Science and Technology217 Gajeong‐ro, Yuseong‐gu305‐350DaejeonKorea
- Center for Energy Convergence ResearchKorea Institute of Science and TechnologyP. O. Box 131, Cheongryang130‐650SeoulKorea
| | - Kyoungja Woo
- Nanophotonics Research CenterKorea Institute of Science and TechnologyP. O. Box 131, Cheongryang130‐650SeoulKorea
- Materials Science and EngineeringUniversity of Science and Technology217 Gajeong‐ro, Yuseong‐gu305‐350DaejeonKorea
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46
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Kossack W, Seidlitz A, Thurn-Albrecht T, Kremer F. Interface and Confinement Induced Order and Orientation in Thin Films of Poly(ϵ-caprolactone). Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00473] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wilhelm Kossack
- Fakultät
für Physik und Geowissenschaften, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
| | - Anne Seidlitz
- Institut
für Physik, FG Experimentelle Polymerphysik, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle/Saale, Germany
| | - Thomas Thurn-Albrecht
- Institut
für Physik, FG Experimentelle Polymerphysik, Martin-Luther-Universität Halle-Wittenberg, 06120 Halle/Saale, Germany
| | - Friedrich Kremer
- Fakultät
für Physik und Geowissenschaften, Universität Leipzig, Linnéstr. 5, 04103 Leipzig, Germany
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47
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Iacob C, Runt J. Charge Transport of Polyester Ether Ionomers in Unidirectional Silica Nanopores. ACS Macro Lett 2016; 5:476-480. [PMID: 35607228 DOI: 10.1021/acsmacrolett.6b00107] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dielectric relaxation spectroscopy is employed to investigate charge transport properties of two polyester ether ionomers in the bulk state and when confined in unidirectional nanoporous membranes (average pore diameter = 7.5 nm). Under nanometric confinement in nonsilanized pores, the macroscopic transport quantities (dc conductivity and characteristic frequency rate) are lower by about 1.4 decades compared to the bulk. The remarkable decrease of transport quantities in nonsilanized nanoporous membranes can be quantitatively explained by considering the temperature dependence of the interfacial layer between the ionomer and the silica membrane surfaces. On the other hand, an enhancement of dc conductivity is observed when the surfaces of the pores are treated with a nonpolar organosilane. This effect becomes more pronounced at lower temperatures and is attributed to slight changes in molecular packing density caused by the two-dimensional geometrical constraint.
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Affiliation(s)
- Ciprian Iacob
- Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - James Runt
- Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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48
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Garaga MN, Persson M, Yaghini N, Martinelli A. Local coordination and dynamics of a protic ammonium based ionic liquid immobilized in nano-porous silica micro-particles probed by Raman and NMR spectroscopy. SOFT MATTER 2016; 12:2583-2592. [PMID: 26838120 DOI: 10.1039/c5sm02736e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Room temperature ionic liquids confined in a solid material, for example, nano-porous silica, are particularly propitious for energy related applications. The aim of this study is to probe the molecular interactions established between the protic ionic liquid diethylmethylammonium methanesulfonate (DEMA-OMs) and silica, where the latter consists of nano-porous micro-particles with pores in the size range of 10 nm. The changes in the local coordination and transport properties induced by the nano-confinement of the ionic liquid are investigated by a combination of Raman and solid-state NMR spectroscopy. In particular, one-dimensional (1D) (1)H and (29)Si and two-dimensional (2D) (29)Si{(1)H} HETOCR solid-state NMR are combined to identify the sites of interaction at the silica-ionic liquid interface. Pulsed field gradient (PFG) NMR experiments are performed to estimate the self-diffusion of both bulk and nano-confined DEMA-OMs. Complementary information on the overall coordination and interaction scheme is achieved by Raman spectroscopy. All these advanced experimental techniques are revealed to be crucial to differentiate between ionic liquid molecules residing in the inter- or intra-particle domains.
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Affiliation(s)
- Mounesha N Garaga
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden.
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49
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Tripathi AK, Singh RK. Interface and core relaxation dynamics of IL molecules in nanopores of ordered mesoporous MCM-41: a dielectric spectroscopy study. RSC Adv 2016. [DOI: 10.1039/c6ra04212k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The dynamics of ionic liquid molecules confined in ordered porous MCM-41 has been investigated by dielectric measurements and two types of confined states of IL were found; pore wall surface adsorbed IL and core of pore filled IL.
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50
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Kipnusu WK, Elsayed M, Kossack W, Pawlus S, Adrjanowicz K, Tress M, Mapesa EU, Krause-Rehberg R, Kaminski K, Kremer F. Confinement for More Space: A Larger Free Volume and Enhanced Glassy Dynamics of 2-Ethyl-1-hexanol in Nanopores. J Phys Chem Lett 2015; 6:3708-3712. [PMID: 26722745 DOI: 10.1021/acs.jpclett.5b01533] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Broadband dielectric spectroscopy and positron annihilation lifetime spectroscopy are employed to study the molecular dynamics and effective free volume of 2-ethyl-1-hexanol (2E1H) in the bulk state and when confined in unidirectional nanopores with average diameters of 4, 6, and 8 nm. Enhanced α-relaxations with decreasing pore diameters closer to the calorimetric glass-transition temperature (T(g)) correlate with the increase in the effective free volume. This indicates that the glassy dynamics of 2D constrained 2E1H is mainly controlled by density variation.
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Affiliation(s)
- Wycliffe K Kipnusu
- Institute of Experimental Physics I, University of Leipzig , Linnéstrasse 5, 04103 Leipzig, Germany
| | - Mohamed Elsayed
- Department of Physics, Martin Luther University Halle , 06099 Halle, Germany
- Department of Physics, Faculty of Science, Minia University , 61519 Minia, Egypt
| | - Wilhelm Kossack
- Institute of Experimental Physics I, University of Leipzig , Linnéstrasse 5, 04103 Leipzig, Germany
| | - Sebastian Pawlus
- Institute of Physics, University of Silesia , ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - Karolina Adrjanowicz
- DNRF Centre "Glass and Time", IMFUFA, Department of Sciences, Roskilde University , Postbox 260, DK-4000 Roskilde, Denmark
| | - Martin Tress
- Institute of Experimental Physics I, University of Leipzig , Linnéstrasse 5, 04103 Leipzig, Germany
| | - Emmanuel U Mapesa
- Institute of Experimental Physics I, University of Leipzig , Linnéstrasse 5, 04103 Leipzig, Germany
| | | | - Kamil Kaminski
- Institute of Physics, University of Silesia , ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - Friedrich Kremer
- Institute of Experimental Physics I, University of Leipzig , Linnéstrasse 5, 04103 Leipzig, Germany
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