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Imamura K, Yokogawa D, Sato H. Recent developments and applications of reference interaction site model self-consistent field with constrained spatial electron density (RISM-SCF-cSED): A hybrid model of quantum chemistry and integral equation theory of molecular liquids. J Chem Phys 2024; 160:050901. [PMID: 38341702 DOI: 10.1063/5.0190116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 01/04/2024] [Indexed: 02/13/2024] Open
Abstract
The significance of solvent effects in electronic structure calculations has long been noted, and various methods have been developed to consider this effect. The reference interaction site model self-consistent field with constrained spatial electron density (RISM-SCF-cSED) is a hybrid model that combines the integral equation theory of molecular liquids with quantum chemistry. This method can consider the statistically convergent solvent distribution at a significantly lower cost than molecular dynamics simulations. Because the RISM theory explicitly considers the solvent structure, it performs well for systems where hydrogen bonds are formed between the solute and solvent molecules, which is a challenge for continuum solvent models. Taking advantage of being founded on the variational principle, theoretical developments have been made in calculating various properties and incorporating electron correlation effects. In this review, we organize the theoretical aspects of RISM-SCF-cSED and its distinctions from other hybrid methods involving integral equation theories. Furthermore, we carefully present its progress in terms of theoretical developments and recent applications.
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Affiliation(s)
- Kosuke Imamura
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Daisuke Yokogawa
- Graduate School of Arts and Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Hirofumi Sato
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
- Fukui Institute for Fundamental Chemistry, Kyoto University, Kyoto 606-8103, Japan
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Bai Y, Zhang H, Liang W, Zhu C, Yan L, Li C. Advances of Zn Metal-Free "Rocking-Chair"-Type Zinc Ion Batteries: Recent Developments and Future Perspectives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2306111. [PMID: 37821411 DOI: 10.1002/smll.202306111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 09/07/2023] [Indexed: 10/13/2023]
Abstract
Aqueous zinc ion battery (AZIBs) has attracted the attention of many researchers because of its safety, economy, environmental protection, and high ionic conductivity of electrolytes. However, the battery greatly suffers from zinc dendrite produced by zinc metal anode leading to poor cycle life and even unsafe problems, which limit its further development for various important applications. It is known that the success of the commercialization of lithium-ion batteries (LIBs) is mainly due to replacement of lithium metal anode with graphite, which avoids the formation of Li dendrite. Therefore, it is an important step to develop aqueous zinc ion anode to replace conventional zinc metal one with zinc-metal free anode material. In this review, the working principle and development prospect of "rocking-chair" AZIBs are introduced. The research progress of different types of zinc metal-free anode materials and cathode materials in "rocking-chair" AZIBs is reviewed. Finally, the limitations and challenges of the Zn metal-free "rocking-chair" AZIBs as well as solutions are deeply discussed, aiming to provide new strategies for the development of advanced zinc-ion batteries.
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Affiliation(s)
- Youcun Bai
- Institute for Materials Science and Devices, School of Materials Science & Engineering, Suzhou University of Science & Technology, Suzhou, 215011, P. R. China
| | - Heng Zhang
- Institute for Materials Science and Devices, School of Materials Science & Engineering, Suzhou University of Science & Technology, Suzhou, 215011, P. R. China
| | - Wenhao Liang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
| | - Chong Zhu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, China
| | - Lijin Yan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 401331, China
| | - Changming Li
- Institute for Materials Science and Devices, School of Materials Science & Engineering, Suzhou University of Science & Technology, Suzhou, 215011, P. R. China
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Ieritano C, Haack A, Hopkins WS. Chemical Transformations Can Occur during DMS Separations: Lessons Learned from Beer's Bittering Compounds. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2023. [PMID: 37310853 DOI: 10.1021/jasms.3c00040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
While developing a DMS-based separation method for beer's bittering compounds, we observed that the argentinated forms of humulone tautomers (i.e., [Hum + Ag]+) were partially resolvable in a N2 environment seeded with 1.5 mol % of isopropyl alcohol (IPA). Attempting to improve the separation by introducing resolving gas unexpectedly caused the peaks for the cis-keto and trans-keto tautomers of [Hum + Ag]+ to coalesce. To understand why resolution loss occurred, we first confirmed that each of the tautomeric forms (i.e., dienol, cis-keto, and trans-keto) responsible for the three peaks in the [Hum + Ag]+ ionogram were assigned to the correct species by employing collision-induced dissociation, UV photodissociation spectroscopy, and hydrogen-deuterium exchange (HDX). The observation of HDX indicated that proton transfer was stimulated by dynamic clustering processes between IPA and [Hum + Ag]+ during DMS transit. Because IPA accretion preferentially occurs at Ag+, which can form pseudocovalent bonds with a suitable electron donor, solvent clustering also facilitated the formation of exceptionally stable microsolvated ions. The exceptional stability of these microsolvated configurations disproportionately impacted the compensation voltage (CV) required to elute each tautomer when the temperature within the DMS cell was varied. The disparity in CV response caused the peaks for the cis- and trans-keto species to merge when a temperature gradient was induced by the resolving gas. Moreover, simulations showed that microsolvation with IPA mediates dienol to trans-keto tautomerization during DMS transit, which, to the best of our knowledge, is the first observation of keto/enol tautomerization occurring within an ion-mobility device.
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Affiliation(s)
- Christian Ieritano
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
- Watermine Innovation, Waterloo, Ontario N0B 2T0, Canada
| | - Alexander Haack
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - W Scott Hopkins
- Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
- Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
- Watermine Innovation, Waterloo, Ontario N0B 2T0, Canada
- Centre for Eye and Vision Research, 17 W Hong Kong Science Park, Shatin, New Territories 999077, Hong Kong
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The Role of Emergent Processing Technologies in Beer Production. BEVERAGES 2023. [DOI: 10.3390/beverages9010007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The brewing industry is regarded as a fiercely competitive and insatiable sector of activity, driven by the significant technological improvements observed in recent years and the most recent consumer trends pointing to a sharp demand for sensory enhanced beers. Some emergent and sustainable technologies regarding food processing such as pulsed electric fields (PEF), ultrasound (US), thermosonication (TS), high-pressure processing (HPP), and ohmic heating (OH) have shown the potential to contribute to the development of currently employed brewing methodologies by both enhancing the quality of beer and contributing to processing efficiency with a promise of being more environmentally friendly. Some of these technologies have not yet found their way into the industrial brewing process but already show potential to be embedded in continuous thermal and non-thermal unit operations such as pasteurization, boiling and sterilization, resulting in beer with improved organoleptic properties. This review article aims to explore the potential of different advanced processing technologies for industrial application in several key stages of brewing, with particular emphasis on continuous beer production.
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Liang J, Zhang D, Cao Y, Xue K, Xia Y, Qi Z. Insight into pyrolysis mechanism of 1,2-propylene glycol: Based on density functional theory and wavefunction analysis. J Mol Graph Model 2022; 116:108277. [PMID: 35930820 DOI: 10.1016/j.jmgm.2022.108277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/19/2022] [Accepted: 07/14/2022] [Indexed: 12/15/2022]
Abstract
The multiple thermal decomposition mechanisms of 1,2-propylene glycol are studied through theoretical calculation and experiment, including carbon chain break, dehydrogenation and dehydration mechanism. The wavefunction is employed to analyze the decomposition process from a micro perspective. DLPNO-CCSD(T)/CBS method is engaged in establishing potential energy surface. The results reveal that the dehydration and carbon chain break mechanism are the primary pyrolysis paths, and the former is the dominant pyrolysis mechanism at low temperature, while the latter is applicable at the high temperature. The pyrolysis products are mainly acetaldehyde, propanal and acetone, which is consistent with experimental results. Besides, the comparison results of 1,2-propylene glycol and glycerol pyrolysis products indicate that the increment of hydroxyls are conducive to the generation of carbonyl compounds during the polyol thermal decomposition. This work is aimed to comprehensively investigate the pyrolysis mechanism of 1,2-propylene glycol and provide the valuable thermodynamics and kinetic data for developing efficient polyol pyrolysis technology. Furthermore, it provides a reference for choosing low-toxic tobacco humectant.
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Affiliation(s)
- Jiankang Liang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, PR China
| | - Dongdong Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, PR China
| | - Yi Cao
- China Tobacco Jiangsu Industrial Co., Ltd., Nanjing, Jiangsu, 210019, PR China
| | - Ke Xue
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, PR China
| | - Yong Xia
- School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou, Hunan, 412007, PR China
| | - Zhengjian Qi
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, PR China.
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