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Olowookere FV, Turner CH. Predicting Gaseous Solute Diffusion in Viscous Multivalent Ionic Liquid Solvents. J Phys Chem B 2023; 127:9144-9154. [PMID: 37831616 DOI: 10.1021/acs.jpcb.3c03858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2023]
Abstract
Calculating solute diffusion in dense, viscous solvents can be particularly challenging in molecular dynamics simulations due to the long time scales involved. Here, a new scaling approach is developed for predicting solute diffusion based on analyses of CO2 and SO2 diffusion in two different multivalent ionic liquid solvents. Various scaling approaches are initially evaluated, including single and separate thermostats for the solute and solvent, as well as the application of the Arrhenius relationship and the Speedy-Angell power law. A very strong logarithmic correlation is established between the solvent-accessible surface area and solute diffusion. This relationship, reflecting Danckwerts' surface renewal theory and the Vrentas-Duda free volume model, presents a valuable method for estimating diffusion behavior from short simulation trajectories at elevated temperatures. The approach may be beneficial for enhancing predictive modeling in similar challenging systems and should be more broadly evaluated.
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Affiliation(s)
- Feranmi V Olowookere
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
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Bandlamudi SRP, McGehee JL, Mando AD, Soltani M, Turner CH, Davis JH, West KN, Rabideau BD. Correction: Understanding liquid-liquid equilibria in binary mixtures of hydrocarbons with a thermally robust perarylphosphonium-based ionic liquid. RSC Adv 2023; 13:20781. [PMID: 37441033 PMCID: PMC10334264 DOI: 10.1039/d3ra90062b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
[This corrects the article DOI: 10.1039/D1RA06268A.].
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Affiliation(s)
- Santosh R P Bandlamudi
- Department of Chemical & Biomolecular Engineering, The University of South Alabama Mobile Alabama 36688 USA +1 251 461-1485 +1 251 460-7147
| | - Jimmie L McGehee
- Department of Chemical & Biomolecular Engineering, The University of South Alabama Mobile Alabama 36688 USA +1 251 461-1485 +1 251 460-7147
| | - Albaraa D Mando
- Department of Chemical & Biomolecular Engineering, The University of South Alabama Mobile Alabama 36688 USA +1 251 461-1485 +1 251 460-7147
| | - Mohammad Soltani
- Department of Chemistry, The University of South Alabama Mobile Alabama 36688 USA
| | - C Heath Turner
- Department of Chemical & Biological Engineering, The University Alabama Tuscaloosa Alabama 35487 USA
| | - James H Davis
- Department of Chemistry, The University of South Alabama Mobile Alabama 36688 USA
| | - Kevin N West
- Department of Chemical & Biomolecular Engineering, The University of South Alabama Mobile Alabama 36688 USA +1 251 461-1485 +1 251 460-7147
| | - Brooks D Rabideau
- Department of Chemical & Biomolecular Engineering, The University of South Alabama Mobile Alabama 36688 USA +1 251 461-1485 +1 251 460-7147
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Barbosa GD, Luz AM, Camargo CL, Tavares FW, Turner CH. Molecular simulation of the structural and thermodynamic properties of n-alkane/brine interfacial systems with nonionic surfactants. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
Solvate ionic liquids (ILs) are promising candidates for several applications due to their stability, high coulombic efficiency, and low volatility. In this work, we investigate the solvation of lithium-bistriflimide by different glycerol-derived triether solvents, using molecular dynamics simulations. Very strong interactions between Li+ and the solvent oxygen sites are found, leading to significant conformational changes in the solvent. By comparing the conformation of the neat solvents with their IL mixtures at different concentrations and temperatures, we find that the presence of Li+ induces a distinct crown-like structure in the solvent molecules. The Li+ cations and the surrounding solvent form a podand complex, which is stable even at elevated temperatures. These glycerol-derived solvents exhibit distinct interactions with Li+ cations which may be exploited in electrolytic applications or lithium recovery processes.
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Affiliation(s)
- Gabriel D Barbosa
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Jason E Bara
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
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Qian S, Liu X, Turner CH, Bara JE. Synthesis and properties of symmetric glycerol-derived 1,2,3-triethers and 1,3-diether-2-ketones for CO2 absorption. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117150] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Barbosa GD, Bara JE, Weinman ST, Turner CH. Molecular aspects of temperature swing solvent extraction for brine desalination using imidazole-based solvents. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.116866] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Affiliation(s)
- Gabriel D. Barbosa
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - C. Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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Barbosa GD, Liu X, Bara JE, Weinman ST, Turner CH. High-salinity brine desalination with amine-based temperature swing solvent extraction: A molecular dynamics study. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117359] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Liu X, Bara JE, Turner CH. Understanding Gas Solubility of Pure Component and Binary Mixtures within Multivalent Ionic Liquids from Molecular Simulations. J Phys Chem B 2021; 125:8165-8174. [PMID: 34260241 DOI: 10.1021/acs.jpcb.1c04212] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Understanding the molecular-level solubility of CO2 and its mixtures is essential to the progress of gas-treating technologies. Herein, we use grand canonical Monte Carlo simulations to study the single-component gas absorption of SO2, N2, CH4, and H2 and binary mixtures of CO2/SO2, CO2/N2, CO2/CH4, and CO2/H2 of varying mole fractions within multivalent ionic liquids (ILs). Our results highlight the importance of the free volume effect and the anion effect when interpreting the absorption behavior of these mixtures, similar to the behavior of CO2 found in our previous study (Phys. Chem. Chem. Phys. 2020, 22, 20618-20633). The deviation of gas solubility between the pure component absorption versus the binary absorption, as well as the solubility selectivity, highlights the importance of the relative affinity of gas species within a mixture to the different anions. The absorption selectivity within a specific IL system can be predicted based on the relative gas affinity to the anion.
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Affiliation(s)
- Xiaoyang Liu
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Jason E Bara
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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Sappidi P, Barbosa G, Rabideau BD, Weinman ST, Turner CH. Molecular Simulation of High-Salinity Brines in Contact with Diisopropylamine and Tripropylamine Solvents. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01057] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Praveenkumar Sappidi
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Gabriel Barbosa
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Brooks D. Rabideau
- Department of Chemical & Biomolecular Engineering, University of South Alabama, Mobile, Alabama 36688, United States
| | - Steven T. Weinman
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - C. Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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Alshaikh A, O'Harra KE, Liu X, Whitley JW, Mittenthal MS, Taylor WF, Turner CH, Bara JE. Scalable, safer and greener syntheses of vinylimidazoles via reactive distillation of hydroxyethylimidazole intermediates. POLYM INT 2021. [DOI: 10.1002/pi.6161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ali Alshaikh
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
| | - Kathryn E O'Harra
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
| | - Xiaoyang Liu
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
| | - John W Whitley
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
| | - Max S Mittenthal
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
| | - Wesley F Taylor
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
| | - C Heath Turner
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
| | - Jason E Bara
- Department of Chemical & Biological Engineering University of Alabama Tuscaloosa AL USA
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Abstract
Ionic liquids (ILs) are known to have tunable solvation properties, based on the pairing of different anions and cations, but the compositional landscape is vast and challenging to navigate efficiently. Some computational screening protocols are available, but they can be either time-consuming or difficult to implement. Herein, we perform a detailed investigation of the fundamental role of electrostatic interactions in these systems. We effectively develop a bridge between the previous volume-based approach with a quantum structure-property relationship approach to create fast, simple screening guidelines. We propose a new parameter that is applicable to both monovalent and multivalent ions, the ionic polarity index (IPI), which is defined as the ratio of the average electrostatic surface potential (V̅) of the ion to the net charge of the ion (q). The IPI correlation has been tested on a diverse data set of 121 ions, and reliable predictions can be obtained within a homologous series of IL compounds.
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Affiliation(s)
- Xiaoyang Liu
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Kathryn E O'Harra
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Jason E Bara
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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Abstract
Ionic liquids (ILs) can serve as effective CO2 solvents with an appropriate selection of different anions and cations. However, due to the large library of potential IL compositions, rapid screening methods are needed for characterizing and ranking the expected properties. We have recently proposed the ionic polarity index (IPI) parameter, effectively connecting volume-based approaches and electrostatic potential analyses and providing a single metric that can potentially be used to rapidly screen for desirable IL properties. In this work, the corresponding anion and cation IPIs are used to generate correlations with respect to the CO2 volumetric solubility in ILs. The relationships are generally applicable to groups of ILs within a homologous ion series, and this can be particularly valuable for prescreening different ion pairings for maximizing gas solvation performance.
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Affiliation(s)
- Xiaoyang Liu
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Kathryn E O'Harra
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Jason E Bara
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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Sappidi P, Liu X, O’Harra KE, Bara JE, Turner CH. How Do Ionic Liquids “Fold” Ionenes? Computational and Experimental Analysis of Imidazolium Polymers Based on Ether and Alkyl Chain Variations Dissolved in an Ionic Liquid. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02604] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Praveenkumar Sappidi
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Xiaoyang Liu
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Kathryn E. O’Harra
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Jason E. Bara
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - C. Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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Bandlamudi SRP, McGehee JL, Mando AD, Soltani M, Turner CH, Davis JH, West KN, Rabideau BD. Understanding liquid–liquid equilibria in binary mixtures of hydrocarbons with a thermally robust perarylphosphonium-based ionic liquid. RSC Adv 2021; 11:31328-31338. [PMID: 35496850 PMCID: PMC9041297 DOI: 10.1039/d1ra06268a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 09/14/2021] [Indexed: 11/28/2022] Open
Abstract
Binary mixtures of hydrocarbons and a thermally robust ionic liquid (IL) incorporating a perarylphosphonium-based cation are investigated experimentally and computationally. Experimentally, it is seen that excess toluene added to the IL forms two distinct liquid phases, an “ion-rich” phase of fixed composition and a phase that is nearly pure toluene. Conversely, n-heptane is observed to be essentially immiscible in the neat IL. Molecular dynamics simulations capture both of these behaviours. Furthermore, the simulated composition of the toluene-rich IL phase is within 10% of the experimentally determined composition. Additional simulations are performed on the binary mixtures of the IL and ten other small hydrocarbons having mixed aromatic/aliphatic character. It is found that hydrocarbons with a predominant aliphatic character are largely immiscible with the IL, while those with a predominant aromatic character readily mix with the IL. A detailed analysis of the structure and energetic changes that occur on mixing reveals the nature of the ion-rich phase. The simulations show a bicontinuous phase with hydrocarbon uptake akin to absorption and swelling by a porous absorbent. Aromatic hydrocarbons are driven into the neat IL via dispersion forces with the IL cations and, to a lesser extent, the IL anions. The ion–ion network expands to accommodate the hydrocarbons, yet maintains a core connective structure. At a certain loading, this network becomes stretched to its limit. The energetic penalty associated with breaking the core connective network outweighs the gain from new hydrocarbon–IL interactions, leaving additional hydrocarbons in the neat phase. The spatially alternating charge of the expanded IL network is shown to interact favourably with the stacked aromatic subphase, something not possible for aliphatic hydrocarbons. Binary mixtures of hydrocarbons and a thermally robust ionic liquid (IL) incorporating a perarylphosphonium-based cation are investigated experimentally and computationally.![]()
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Affiliation(s)
- Santosh R. P. Bandlamudi
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA
| | - Jimmie L. McGehee
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA
| | - Albaraa D. Mando
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA
| | - Mohammad Soltani
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, USA
| | - C. Heath Turner
- Department of Chemical & Biological Engineering, The University Alabama, Tuscaloosa, Alabama 35487, USA
| | - James H. Davis
- Department of Chemistry, The University of South Alabama, Mobile, Alabama 36688, USA
| | - Kevin N. West
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA
| | - Brooks D. Rabideau
- Department of Chemical & Biomolecular Engineering, The University of South Alabama, Mobile, Alabama 36688, USA
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Qian S, Liu X, Emel’yanenko VN, Sikorski P, Kammakakam I, Flowers BS, Jones TA, Turner CH, Verevkin SP, Bara JE. Synthesis and Properties of 1,2,3-Triethoxypropane: A Glycerol-Derived Green Solvent Candidate. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c03789] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Shuai Qian
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Xiaoyang Liu
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | | | - Patryk Sikorski
- Faculty of Chemistry, Department of Physical Chemistry, Warsaw University of Technology, Warsaw 00-664, Poland
| | - Irshad Kammakakam
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Brian S. Flowers
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Tristin A. Jones
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - C. Heath Turner
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Sergey P. Verevkin
- Chemical Technological Department, Samara State Technical University, Samara 443100, Russia
- Institute of Chemistry, University of Rostock, Rostock 18059, Germany
| | - Jason E. Bara
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
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Liu X, O'Harra KE, Bara JE, Turner CH. Molecular insight into the anion effect and free volume effect of CO 2 solubility in multivalent ionic liquids. Phys Chem Chem Phys 2020; 22:20618-20633. [PMID: 32966430 DOI: 10.1039/d0cp03424j] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
For many years, experimental and theoretical studies have investigated the solubility of CO2 in a variety of ionic liquids (ILs), but the overarching absorption mechanism is still unclear. Currently, two different factors are believed to dominate the absorption performance: (a) the fractional free volume (FFV) accessible for absorption; and (b) the nature of the CO2 interactions with the anion species. The FFV is often more influential than the specific choice of the anion, but neither mechanism provides a complete picture. Herein, we have attempted to decouple these mechanisms in order to provide a more definitive molecular-level perspective of CO2 absorption in IL solvents. We simulate a series of nine different multivalent ILs comprised of imidazolium cations and sulfonate/sulfonimide anions tethered to benzene rings, along with a comprehensive analysis of the CO2 absorption and underlying molecular-level features. We find that the CO2 solubility has a very strong, linear correlation with respect to FFV, but only when comparisons are constrained to a common anion species. The choice of anion results in a fundamental remapping of the correlation between CO2 solubility and FFV. Overall, the free volume effect dominates in the ILs with smaller FFV values, while the choice of anion becomes more important in the systems with larger FFVs. Our proposed mechanistic map is intended to provide a more consistent framework for guiding further IL design for gas absorption applications.
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Affiliation(s)
- Xiaoyang Liu
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Kathryn E O'Harra
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Jason E Bara
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
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Atkinson H, Bara JE, Turner CH. Molecular-level analysis of the wetting behavior of imidazolium-based ionic liquids on bismuth telluride surfaces. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2019.115270] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Lu Z, Liu X, Zhang B, Gan Z, Tang S, Ma L, Wu T, Nelson GJ, Qin Y, Turner CH, Lei Y. Structure and reactivity of single site Ti catalysts for propylene epoxidation. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.051] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Szala-Bilnik J, Abedini A, Crabtree E, Bara JE, Turner CH. Molecular Transport Behavior of CO 2 in Ionic Polyimides and Ionic Liquid Composite Membrane Materials. J Phys Chem B 2019; 123:7455-7463. [PMID: 31368706 DOI: 10.1021/acs.jpcb.9b05555] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ionic polyimides (i-PI) are a new class of polymer materials that are very promising for CO2 capture membranes, and recent experimental studies have demonstrated their enhanced separation performance with the addition of imidazolium-based ionic liquids (ILs). However, there is very little known about the molecular-level interactions in these systems, which give rise to interesting gas adsorption and diffusion characteristics. In this study, we use a combination of Monte Carlo and molecular dynamics simulations to analyze the equilibrium and transport properties of CO2 molecules in the i-PI and i-PI + IL composite materials. The addition of several different common ILs are modeled, which have a plasticization effect on the i-PI, lowering the glass transition temperature (Tg). The solubility of CO2 strongly correlates with the Tg, but the diffusion demonstrates more unpredictable behavior. At low concentrations, the IL has a blocking effect, leading to reduced diffusion rates. However, as the IL surpasses a threshold value, the relationship is inverted and the IL has a facilitating effect on the gas transport. This behavior is attributed to the simultaneous contributions of the increased i-PI plasticization at higher IL concentrations (facilitating gas hopping rates from cavity-to-cavity) and the increased IL continuity throughout the system, enabling more favorable transport pathways for CO2 diffusion.
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Affiliation(s)
- Joanna Szala-Bilnik
- Department of Chemical and Biological Engineering , The University of Alabama , Tuscaloosa , Alabama 35487-0203 , United States
| | - Asghar Abedini
- Department of Chemical and Biological Engineering , The University of Alabama , Tuscaloosa , Alabama 35487-0203 , United States
| | - Ellis Crabtree
- Department of Chemical and Biological Engineering , The University of Alabama , Tuscaloosa , Alabama 35487-0203 , United States
| | - Jason E Bara
- Department of Chemical and Biological Engineering , The University of Alabama , Tuscaloosa , Alabama 35487-0203 , United States
| | - C Heath Turner
- Department of Chemical and Biological Engineering , The University of Alabama , Tuscaloosa , Alabama 35487-0203 , United States
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Abedini A, Crabtree E, Bara JE, Turner CH. Molecular analysis of selective gas adsorption within composites of ionic polyimides and ionic liquids as gas separation membranes. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.08.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ji J, Lu Z, Lei Y, Turner CH. Mechanistic insights into the direct propylene epoxidation using Au nanoparticles dispersed on TiO2/SiO2. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.06.064] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wang H, An W, Liu X, Heath Turner C. Oxygen reduction reaction on Pt(1 1 1), Pt(2 2 1), and Ni/Au1Pt3(2 2 1) surfaces: Probing scaling relationships of reaction energetics and interfacial composition. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.03.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Liu X, An W, Turner CH, Resasco DE. Hydrodeoxygenation of m-cresol over bimetallic NiFe alloys: Kinetics and thermodynamics insight into reaction mechanism. J Catal 2018. [DOI: 10.1016/j.jcat.2018.01.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Liu X, An W, Wang Y, Turner CH, Resasco DE. Hydrodeoxygenation of guaiacol over bimetallic Fe-alloyed (Ni, Pt) surfaces: reaction mechanism, transition-state scaling relations and descriptor for predicting C–O bond scission reactivity. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00282g] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Small means big: DFT-calculated C–O bond length of adsorbed intermediates can serve as a good descriptor for predicting the C–O bond scission reactivity of phenolics over metal catalysts.
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Affiliation(s)
- Xiaoyang Liu
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- China
| | - Wei An
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- China
| | - Yixing Wang
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- China
| | - C. Heath Turner
- Department of Chemical and Biological Engineering
- University of Alabama
- Tuscaloosa
- USA
| | - Daniel E. Resasco
- School of Chemical
- Biological and Materials Engineering and Center for Biomass Refining
- University of Oklahoma
- Norman
- USA
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31
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Liu X, An W, Wang Y, Turner CH, Resasco DE. Correction: Hydrodeoxygenation of guaiacol over bimetallic Fe-alloyed (Ni, Pt) surfaces: reaction mechanism, transition-state scaling relations and descriptor for predicting C–O bond scission reactivity. Catal Sci Technol 2018. [DOI: 10.1039/c8cy90066c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for ‘Hydrodeoxygenation of guaiacol over bimetallic Fe-alloyed (Ni, Pt) surfaces: reaction mechanism, transition-state scaling relations and descriptor for predicting C–O bond scission reactivity’ by Xiaoyang Liu et al., Catal. Sci. Technol., 2018, 8, 2146–2158.
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Affiliation(s)
- Xiaoyang Liu
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- China
| | - Wei An
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- China
| | - Yixing Wang
- College of Chemistry and Chemical Engineering
- Shanghai University of Engineering Science
- Shanghai 201620
- China
| | - C. Heath Turner
- Department of Chemical and Biological Engineering
- University of Alabama
- Tuscaloosa
- USA
| | - Daniel E. Resasco
- School of Chemical, Biological and Materials Engineering and Center for Biomass Refining
- University of Oklahoma
- Norman
- USA
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Affiliation(s)
- Deepti Srivastava
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - C. Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Erik E. Santiso
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Keith E. Gubbins
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
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Abedini A, Crabtree E, Bara JE, Turner CH. Molecular Simulation of Ionic Polyimides and Composites with Ionic Liquids as Gas-Separation Membranes. Langmuir 2017; 33:11377-11389. [PMID: 28764329 DOI: 10.1021/acs.langmuir.7b01977] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Polyimides are at the forefront of advanced membrane materials for CO2 capture and gas-purification processes. Recently, ionic polyimides (i-PIs) have been reported as a new class of condensation polymers that combine structural components of both ionic liquids (ILs) and polyimides through covalent linkages. In this study, we report CO2 and CH4 adsorption and structural analyses of an i-PI and an i-PI + IL composite containing [C4mim][Tf2N]. The combination of molecular dynamics (MD) and grand canonical Monte Carlo (GCMC) simulations is used to compute the gas solubility and the adsorption performance with respect to the density, fractional free volume (FFV), and surface area of the materials. Our results highlight the polymer relaxation process and its correlation to the gas solubility. In particular, the surface area can provide meaningful guidance with respect to the gas solubility, and it tends to be a more sensitive indicator of the adsorption behavior versus only considering the system density and FFV. For instance, as the polymer continues to relax, the density, FFV, and pore-size distribution remain constant while the surface area can continue to increase, enabling more adsorption. Structural analyses are also conducted to identify the nature of the gas adsorption once the ionic liquid is added to the polymer. The presence of the IL significantly displaces the CO2 molecules from the ligand nitrogen sites in the neat i-PI to the imidazolium rings in the i-PI + IL composite. However, the CH4 molecules move from the imidazolium ring sites in the neat i-PI to the ligand nitrogen atoms in the i-PI + IL composite. These molecular details can provide critical information for the experimental design of highly selective i-PI materials as well as provide additional guidance for the interpretation of the simulated adsorption systems.
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Affiliation(s)
- Asghar Abedini
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
| | - Ellis Crabtree
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
| | - Jason E Bara
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
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Abstract
A new apparatus to measure the hydrostatic pressures developed during the cementation of dowel-retained prostheses has been developed and is described. The initial results obtained using this apparatus have been shown to vary from zero if the dowel is coated with cement, to 1.1 times 104 kN/m2 when cement is placed into the prepared hole for an optimally fitting dowel. Avenues of further research using this apparatus are mentioned.
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Affiliation(s)
- C H Turner
- The Dental School, University of Sheffield (formerly University College Hospital Dental School)
| | - M J Gross
- Department of Geophysics, University of Newcastle upon Tyne
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36
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Whitley JW, Benefield SC, Liu H, Burnette MT, Turner CH, Bara JE. Photopolymerization Behavior of Coordinated Ionic Liquids Formed from Organic Monomers with Alkali and Alkaline Earth Metal Bistriflimide Salts. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600358] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- John W. Whitley
- Department of Chemical and Biological Engineering; University of Alabama; Tuscaloosa AL 35487-0203 USA
| | - Shellby C. Benefield
- Department of Chemical and Biological Engineering; University of Alabama; Tuscaloosa AL 35487-0203 USA
| | - Haining Liu
- Department of Chemistry and Biochemistry; University of Notre Dame; Notre Dame IN 46566 USA
| | - Michael T. Burnette
- Department of Chemical and Biological Engineering; University of Alabama; Tuscaloosa AL 35487-0203 USA
| | - C. Heath Turner
- Department of Chemical and Biological Engineering; University of Alabama; Tuscaloosa AL 35487-0203 USA
| | - Jason E. Bara
- Department of Chemical and Biological Engineering; University of Alabama; Tuscaloosa AL 35487-0203 USA
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37
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Abedini A, Ludwig T, Zhang Z, Turner CH. Molecular Dynamics Simulation of Bismuth Telluride Exfoliation Mechanisms in Different Ionic Liquid Solvents. Langmuir 2016; 32:9982-9992. [PMID: 27622940 DOI: 10.1021/acs.langmuir.6b02663] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bismuth telluride (Bi2Te3) is a well-known thermoelectric material with potential applications in several different emerging technologies. The bulk structure is composed of stacks of quintuple sheets (with weak interactions between neighboring sheets), and the performance of the material can be significantly enhanced if exfoliated into two-dimensional nanosheets. In this study, eight different imidazolium-based ionic liquids are evaluated as solvents for the exfoliation and dispersion of Bi2Te3 at temperatures ranging from 350 to 550 K. Three distinct exfoliation mechanisms are evaluated (pulling, shearing, and peeling) using steered molecular dynamics simulations, and we predict that the peeling mechanism is thermodynamically the most favorable route. Furthermore, the [Tf2N-]-based ionic liquids are particularly effective at enhancing the exfoliation, and this performance can be correlated to the unique molecular-level solvation structures developed at the Bi2Te3 surfaces. This information helps provide insight into the molecular origins of exfoliation and solvation involving Bi2Te3 (and possibly other layered chalcogenide materials) and ionic liquid solvents.
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Affiliation(s)
- Asghar Abedini
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
| | - Thomas Ludwig
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
| | - Zhongtao Zhang
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
| | - C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama , Box 870203, Tuscaloosa, Alabama 35487, United States
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Abstract
The properties of gold nanoparticles strongly depend on their three-dimensional atomic structure, leading to an increased emphasis on controlling and predicting nanoparticle structural evolution during the synthesis process. In order to provide this atomistic-level insight and establish a link to the experimentally-observed growth behavior, a kinetic Monte Carlo simulation (KMC) approach is developed for capturing Au nanoparticle growth characteristics. The advantage of this approach is that, compared to traditional molecular dynamics simulations, the atomistic nanoparticle structural evolution can be tracked on time scales that approach the actual experiments. This has enabled several different comparisons against experimental benchmarks, and it has helped transition the KMC simulations from a hypothetical toy model into a more experimentally-relevant test-bed. The model is initially parameterized by performing a series of automated comparisons of Au nanoparticle growth curves versus the experimental observations, and then the refined model allows for detailed structural analysis of the nanoparticle growth behavior. Although the Au nanoparticles are roughly spherical, the maximum/minimum dimensions deviate from the average by approximately 12.5%, which is consistent with the corresponding experiments. Also, a surface texture analysis highlights the changes in the surface structure as a function of time. While the nanoparticles show similar surface structures throughout the growth process, there can be some significant differences during the initial growth at different synthesis conditions.
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Affiliation(s)
- C Heath Turner
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
| | - Yu Lei
- Department of Chemical and Materials Engineering, The University of Alabama in Huntsville, Huntsville, AL 35899, USA
| | - Yuping Bao
- Department of Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487, USA.
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39
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Ludwig T, Guo L, McCrary P, Zhang Z, Gordon H, Quan H, Stanton M, Frazier RM, Rogers RD, Wang HT, Turner CH. Mechanism of bismuth telluride exfoliation in an ionic liquid solvent. Langmuir 2015; 31:3644-3652. [PMID: 25760309 DOI: 10.1021/acs.langmuir.5b00239] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Bismuth telluride (Bi2Te3) is a well-known thermoelectric material that has a layered crystal structure. Exfoliating Bi2Te3 to produce two-dimensional (2D) nanosheets is extremely important because the exfoliated nanosheets possess unique properties, which can potentially revolutionize several material technologies such as thermoelectrics, heterogeneous catalysts, and infrared detectors. In this work, ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([C4mim]Cl) is used to exfoliate Bi2Te3 nanoplatelets. In both experiments and in molecular dynamics (MD) simulations, the Bi2Te3 nanoplatelets yield a stable dispersion of 2D nanosheets in the IL solvent, and our MD simulations provide molecular-level insight into the kinetics and thermodynamics of the exfoliation process. An analysis of the dynamics of Bi2Te3 during exfoliation indicates that the relative translation (sliding apart) of adjacent layers caused by IL-induced forces plays an important role in the process. Moreover, an evaluation of the MD trajectories and electrostatic interactions indicates that the [C4mim](+) cation is primarily responsible for initiating Bi2Te3 layer sliding and separation, while the Cl(-) anion is less active. Overall, our combined experimental and computational investigation highlights the effectiveness of IL-assisted exfoliation, and the underlying molecular-level insights should accelerate the development of future exfoliation techniques for producing 2D chalcogenide materials.
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Affiliation(s)
| | | | | | | | - Haley Gordon
- ⊥Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
- #St. Mary's College, Notre Dame, Indiana 46556, United States
| | | | - Michael Stanton
- ∇Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Shannon MS, Irvin AC, Liu H, Moon JD, Hindman MS, Turner CH, Bara JE. Chemical and Physical Absorption of SO2 by N-Functionalized Imidazoles: Experimental Results and Molecular-level Insight. Ind Eng Chem Res 2014. [DOI: 10.1021/ie503752h] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Matthew S. Shannon
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - A. Christopher Irvin
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Haining Liu
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Joshua D. Moon
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Michelle S. Hindman
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - C. Heath Turner
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Jason E. Bara
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
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41
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Affiliation(s)
- Haining Liu
- Department of Chemical and
Biological Engineering, The University of Alabama, Box 870203, Tuscaloosa, Alabama 35487-0203, United States
| | - Jason E. Bara
- Department of Chemical and
Biological Engineering, The University of Alabama, Box 870203, Tuscaloosa, Alabama 35487-0203, United States
| | - C. Heath Turner
- Department of Chemical and
Biological Engineering, The University of Alabama, Box 870203, Tuscaloosa, Alabama 35487-0203, United States
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42
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Liu H, Turner CH. Oxygen adsorption characteristics on hybrid carbon and boron-nitride nanotubes. J Comput Chem 2014; 35:1058-63. [DOI: 10.1002/jcc.23589] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 02/17/2014] [Accepted: 02/23/2014] [Indexed: 01/21/2023]
Affiliation(s)
- Haining Liu
- Department of Chemical and Biological Engineering; The University of Alabama; Tuscaloosa Alabama 35487-0203
| | - C. Heath Turner
- Department of Chemical and Biological Engineering; The University of Alabama; Tuscaloosa Alabama 35487-0203
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43
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Abstract
Hybrid CNT–BNNT materials are predicted to have enhanced NO2 adsorption, which leads to large shifts in band gap, indicating potential sensing applications.
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Affiliation(s)
- Haining Liu
- Department of Chemical and Biological Engineering
- The University of Alabama
- Tuscaloosa, USA
| | - C. Heath Turner
- Department of Chemical and Biological Engineering
- The University of Alabama
- Tuscaloosa, USA
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44
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Liu H, Zhang Z, Bara JE, Turner CH. Electrostatic Potential within the Free Volume Space of Imidazole-Based Solvents: Insights into Gas Absorption Selectivity. J Phys Chem B 2013; 118:255-64. [DOI: 10.1021/jp410143j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Haining Liu
- Department of Chemical & Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Zhongtao Zhang
- Department of Chemical & Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Jason E. Bara
- Department of Chemical & Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - C. Heath Turner
- Department of Chemical & Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
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45
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Hindman MS, Stanton AD, Irvin AC, Wallace DA, Moon JD, Reclusado KR, Liu H, Belmore KA, Liang Q, Shannon MS, Turner CH, Bara JE. Synthesis of 1,2-Dialkyl-, 1,4(5)-Dialkyl-, and 1,2,4(5)-Trialkylimidazoles via a One-Pot Method. Ind Eng Chem Res 2013. [DOI: 10.1021/ie401861b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Michelle S. Hindman
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Alexander D. Stanton
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - A. Christopher Irvin
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - David A. Wallace
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Joshua D. Moon
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
- NSF-REU Site: Engineering Solutions for Clean Energy Generation, Storage and Consumption, Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Kristopher R. Reclusado
- NSF-REU Site: Engineering Solutions for Clean Energy Generation, Storage and Consumption, Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
- Department of Chemical Engineering, Villanova University, Villanova, Pennsylvania 19085,
United States
| | - Haining Liu
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Kenneth A. Belmore
- Department
of Chemistry, University of Alabama, Tuscaloosa,
Alabama 35487-0336, United States
| | - Qiaoli Liang
- Department
of Chemistry, University of Alabama, Tuscaloosa,
Alabama 35487-0336, United States
| | - Matthew S. Shannon
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - C. Heath Turner
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
| | - Jason E. Bara
- Department of Chemical & Biological Engineering, University of Alabama, Tuscaloosa, Alabama 35487-0203, United States
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Turner CH, Cooper A, Zhang Z, Shannon MS, Bara JE. Molecular Simulation of the Thermophysical Properties of N-Functionalized Alkylimidazoles. J Phys Chem B 2012; 116:6529-35. [DOI: 10.1021/jp3029787] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
| | - Alex Cooper
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904-4741,
United States
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47
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Morris SJ, Ali I, Turner CH, Thurston DE. An Investigation of the Possible Mode of Action of Neothramycin, A Pyrrolo {2,1-C}{1,4}Benzodiazepine Antitumour Agent. J Pharm Pharmacol 2011. [DOI: 10.1111/j.2042-7158.1990.tb14416.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- SJ Morris
- School of Pharmacy, Portsmouth polytechnic, PO1 2DZ
| | - I Ali
- School of Pharmacy, Portsmouth polytechnic, PO1 2DZ
| | - CH Turner
- School of Pharmacy, Portsmouth polytechnic, PO1 2DZ
| | - DE Thurston
- School of Pharmacy, Portsmouth polytechnic, PO1 2DZ
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Palchoudhury S, An W, Xu Y, Qin Y, Zhang Z, Chopra N, Holler RA, Turner CH, Bao Y. Synthesis and growth mechanism of iron oxide nanowhiskers. Nano Lett 2011; 11:1141-1146. [PMID: 21309553 DOI: 10.1021/nl200136j] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Iron oxide nanowhiskers with dimensions of approximately 2 × 20 nm were successfully synthesized by selectively heating an iron oleate complex. Such nanostructures resulted from the difference in the ligand coordination microenvironments of the Fe(III) oleate complex, according to our electronic structure calculations and thermogravimetric analysis. A ligand-directed growth mechanism was subsequently proposed to rationalize the growth process. The formation of the nanowhiskers provides a unique example of shape-controlled nanostructures, offering additional insights into nanoparticle synthesis.
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Affiliation(s)
- Soubantika Palchoudhury
- Chemical and Biological Engineering, The University of Alabama , Tuscaloosa, Alabama, 35487 United States
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49
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Abstract
The in situ growth stress and postgrowth stress relaxation during the L1(0) chemical ordering of Fe0.54Pt0.46 thin films have been characterized. The compressive stress is reduced with an increase in order parameter. The postgrowth stress relaxation rate increased with the order parameter and is rationalized in terms of an increase in the interfacial energy contribution at the grain boundaries because of chemical order. Density functional theory calculations were performed to quantify possible diffusion pathways and binding energies for Fe and Pt that may mitigate surface migration.
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Affiliation(s)
- B Fu
- Department of Metallurgical and Materials Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0202, USA
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50
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