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Chen T, Sun Z, Guo Y, Xu Y. Does the active hydrogen atom in the hydantoin anion affect the physical properties, CO 2 capture and conversion of ionic liquids? Phys Chem Chem Phys 2024; 26:12957-12964. [PMID: 38632968 DOI: 10.1039/d3cp05965k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
Compared to the effect of the active hydrogen atom in the cation in protic ionic liquids (ILs) on their properties and applications, there are very few reports on the role of the active hydrogen atom in the anion. In order to better understand the role of the active hydrogen atom in the anion, the physical properties, CO2 capture and conversion of three hydantoin-based anion-functionalized ILs ([P4442][Hy], [P4442]2[Hy], and [HDBU][Hy]) have been investigated via experiments, spectroscopy, and DFT calculations in this work. The results show that the active hydrogen atom in the anion can form anionic hydrogen bonding networks, which significantly increase the melting point and viscosity and decrease the basicity of the IL, thereby weakening its ability to capture and convert CO2. Interestingly, [P4442][Hy] undergoes a solid/liquid two-phase transition during CO2 absorption/desorption due to the formation of quasi-intramolecular hydrogen bonding between the active hydrogen atom and the O- atom of the absorbed CO2, suggesting that the presence of the active hydrogen atom gives [P4442][Hy] the potential to be an excellent molecular switch. As there is no active hydrogen atom in the anion of [P4442]2[Hy], it shows excellent CO2 capture and conversion performance through the double-site interaction. [HDBU][Hy] shows the weakest catalytic CO2 conversion due to the presence of active hydrogen atoms on both its anion and cation. Therefore, the active hydrogen atom in the anion may play a more important role in the properties and potential applications of ILs than the active hydrogen atom in the cation.
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Affiliation(s)
- Tingting Chen
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
| | - Zhongyuan Sun
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
| | - Yujun Guo
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
| | - Yingjie Xu
- Department of Chemistry, Shaoxing University, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China.
- Zhejiang Engineering Research Center of Fat-soluble Vitamin, 508 Huancheng West Road, Shaoxing, Zhejiang Province, 312000, China
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2
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Knanghat R, Senapati S. Toward Greater DNA Stability by Leveraging the Proton-Donating Ability of Protic Ionic Liquids. J Phys Chem B 2024. [PMID: 38682809 DOI: 10.1021/acs.jpcb.3c08479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
Abstract
Deoxyribonucleic acid (DNA) stability is a prerequisite in many applications, ranging from DNA-based vaccines and data storage to gene therapy. However, the strategies to enhance DNA stability are limited, and the underlying mechanisms are poorly understood. Ionic liquids (ILs), molten salts of organic cations and organic/inorganic anions, are showing tremendous prospects in myriads of applications. With a judicious choice of constituent ions, the protic nature of ILs can be tuned. In this work, we investigate the relative stability of full-length genomic DNA in aqueous IL solutions of increasing protic nature. Our experimental measurements show that the protic ionic liquids (PILs) enhance the DNA melting temperature significantly while unaltering its native B-conformation. Molecular dynamics simulations and quantum mechanical calculation results suggest that the intramolecular Watson-Crick H-bonding in DNA remains unaffected and, in addition, the PILs induce stronger H-bonding networks in solution through their ability to make multiple intermolecular H-bonds with the nucleobases and among its constituent ions, thus aiding greater DNA stability. The detailed understanding obtained from this study could bring about the much-awaited breakthrough in improved DNA stability for its sustained use in the aforesaid applications!
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Affiliation(s)
- Rajani Knanghat
- Department of Biotechnology and BJM School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
| | - Sanjib Senapati
- Department of Biotechnology and BJM School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India
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3
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Iribarren I, Mates-Torres E, Trujillo C. Revisiting ion-pair interactions in phase transfer catalysis: from ionic compounds to real catalyst systems. Dalton Trans 2024; 53:1322-1335. [PMID: 38116737 DOI: 10.1039/d3dt03978a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Ion-pairing is a fundamental phenomenon that significantly influences phase-transfer catalysis. In this study, we conduct a comprehensive investigation of ion-pair interactions, aiming to establish a comprehensive understanding of their nature and implications. The study begins with the examination of polar ionic compounds to define the concept of an ion-pair in the context of phase-transfer catalysis. Subsequently, a diverse range of ion-pair catalyst models were explored to gain insight into the factors governing their interactions. Finally, the focus shifts towards the characterisation of real phase-transfer catalysts, bridging the gap between theoretical models and practical applications. Through a combination of computational approaches and theoretical analysis, this work provides valuable insight into the nature of ion-pair interactions within phase-transfer catalysis fields.
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Affiliation(s)
- Iñigo Iribarren
- School of Chemistry, Trinity College Dublin, The University of Dublin, 154-160 Pearse Street, D02 R590 Dublin, Ireland
| | - Eric Mates-Torres
- School of Chemistry, Trinity College Dublin, The University of Dublin, 154-160 Pearse Street, D02 R590 Dublin, Ireland
| | - Cristina Trujillo
- School of Chemistry, Trinity College Dublin, The University of Dublin, 154-160 Pearse Street, D02 R590 Dublin, Ireland
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4
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Kislenko E, İncel A, Gawlitza K, Sellergren B, Rurack K. Towards molecularly imprinted polymers that respond to and capture phosphorylated tyrosine epitopes using fluorescent bis-urea and bis-imidazolium receptors. J Mater Chem B 2023; 11:10873-10882. [PMID: 37877301 DOI: 10.1039/d3tb01474f] [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: 10/26/2023]
Abstract
Early detection of cancer is essential for successful treatment and improvement in patient prognosis. Deregulation of post-translational modifications (PTMs) of proteins, especially phosphorylation, is present in many types of cancer. Therefore, the development of materials for the rapid sensing of low abundant phosphorylated peptides in biological samples can be of great therapeutic value. In this work, we have synthesised fluorescent molecularly imprinted polymers (fMIPs) for the detection of the phosphorylated tyrosine epitope of ZAP70, a cancer biomarker. The polymers were grafted as nanometer-thin shells from functionalised submicron-sized silica particles using a reversible addition-fragmentation chain-transfer (RAFT) polymerisation. Employing the combination of fluorescent urea and intrinsically cationic bis-imidazolium receptor cross-linkers, we have developed fluorescent sensory particles, showing an imprinting factor (IF) of 5.0. The imprinted polymer can successfully distinguish between phosphorylated and non-phosphorylated tripeptides, reaching lower micromolar sensitivity in organic solvents and specifically capture unprotected peptide complements in a neutral buffer. Additionally, we have shown the importance of assessing the influence of counterions present in the MIP system on the imprinting process and final material performance. The potential drawbacks of using epitopes with protective groups, which can co-imprint with targeted functionality, are also discussed.
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Affiliation(s)
- Evgeniia Kislenko
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Str. 11, D-12489 Berlin, Germany.
| | - Anıl İncel
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-20506 Malmö, Sweden
| | - Kornelia Gawlitza
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Str. 11, D-12489 Berlin, Germany.
| | - Börje Sellergren
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-20506 Malmö, Sweden
| | - Knut Rurack
- Chemical and Optical Sensing Division, Bundesanstalt für Materialforschung und -prüfung (BAM), Richard-Willstätter-Str. 11, D-12489 Berlin, Germany.
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5
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Kim S, Conrad JA, Tow GM, Maginn EJ, Boatz JA, Gordon MS. Intermolecular interactions in clusters of ethylammonium nitrate and 1-amino-1,2,3-triazole. Phys Chem Chem Phys 2023; 25:30428-30457. [PMID: 37917371 DOI: 10.1039/d3cp02407e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
The intermolecular interaction energies, including hydrogen bonds (H-bonds), of clusters of the ionic liquid ethylammonium nitrate (EAN) and 1-amino-1,2,3-triazole (1-AT) based deep eutectic propellants (DeEP) are examined. 1-AT is introduced as a neutral hydrogen bond donor (HBD) to EAN in order to form a eutectic mixture. The effective fragment potential (EFP) is used to examine the bonding interactions in the DeEP clusters. The resolution of the Identity (RI) approximated second order Møller-Plesset perturbation theory (RI-MP2) and coupled cluster theory (RI-CCSD(T)) are used to validate the EFP results. The EFP method predicts that there are significant polarization and charge transfer effects in the EAN:1-AT complexes, along with Coulombic, dispersion and exchange repulsion interactions. The EFP interaction energies are in good agreement with the RI-MP2 and RI-CCSD(T) results. The quasi-atomic orbital (QUAO) bonding and kinetic bond order (KBO) analyses are additionally used to develop a conceptual and semi-quantitative understanding of the H-bonding interactions as a function of the size of the system. The QUAO and KBO analyses suggest that the H-bonds in the examined clusters follow the characteristic hydrogen bonding three-center four electron interactions. The strongest H-bonding interactions between the (EAN)1:(1-AT)n and (EAN)2:(1-AT)n (n = 1-5) complexes are observed internally within EAN; that is, between the ethylammonium cation [EA]+ and the nitrate anion ([NO3]-). The weakest H-bonding interactions occur between [NO3]- and 1-AT. Consequently, the average strengths of the H-bonds within a given (EAN)x:(1-AT)n complex decrease as more 1-AT molecules are introduced into the EAN monomer and EAN dimer. The QUAO bonding analysis suggests that 1-AT in (EAN)x:(1-AT)n can act as both a HBD and a hydrogen bond acceptor simultaneously. It is observed that two 1-AT molecules can form H-bonds to each other. Although the KBOs that correspond to H-bonding interactions in [EA]+:1-AT, [NO3]-:1-AT and between two 1-AT molecules are weaker than the H-bonds in EAN, those weak H-bond networks with 1-AT could be important to form a stable DeEP.
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Affiliation(s)
- Shinae Kim
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, IA 50011, USA.
- Combustion Research Facility, Sandia National Laboratories, Livermore, California 94550, USA
| | - Justin A Conrad
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, IA 50011, USA.
| | - Garrett M Tow
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Edward J Maginn
- Department of Chemical & Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Jerry A Boatz
- Aerospace Systems Directorate, Air Force Research Laboratory, Edwards Air Force Base, California 93524, USA
| | - Mark S Gordon
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, IA 50011, USA.
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6
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Light, Water, and Melatonin: The Synergistic Regulation of Phase Separation in Dementia. Int J Mol Sci 2023; 24:ijms24065835. [PMID: 36982909 PMCID: PMC10054283 DOI: 10.3390/ijms24065835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 03/17/2023] [Indexed: 03/22/2023] Open
Abstract
The swift rise in acceptance of molecular principles defining phase separation by a broad array of scientific disciplines is shadowed by increasing discoveries linking phase separation to pathological aggregations associated with numerous neurodegenerative disorders, including Alzheimer’s disease, that contribute to dementia. Phase separation is powered by multivalent macromolecular interactions. Importantly, the release of water molecules from protein hydration shells into bulk creates entropic gains that promote phase separation and the subsequent generation of insoluble cytotoxic aggregates that drive healthy brain cells into diseased states. Higher viscosity in interfacial waters and limited hydration in interiors of biomolecular condensates facilitate phase separation. Light, water, and melatonin constitute an ancient synergy that ensures adequate protein hydration to prevent aberrant phase separation. The 670 nm visible red wavelength found in sunlight and employed in photobiomodulation reduces interfacial and mitochondrial matrix viscosity to enhance ATP production via increasing ATP synthase motor efficiency. Melatonin is a potent antioxidant that lowers viscosity to increase ATP by scavenging excess reactive oxygen species and free radicals. Reduced viscosity by light and melatonin elevates the availability of free water molecules that allow melatonin to adopt favorable conformations that enhance intrinsic features, including binding interactions with adenosine that reinforces the adenosine moiety effect of ATP responsible for preventing water removal that causes hydrophobic collapse and aggregation in phase separation. Precise recalibration of interspecies melatonin dosages that account for differences in metabolic rates and bioavailability will ensure the efficacious reinstatement of the once-powerful ancient synergy between light, water, and melatonin in a modern world.
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7
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Antony FM, Wasewar KL. Ionic liquids as green solvents in process industry for reaction and separation: emphasizing on protocatechuic acid recovery. CHEM ENG COMMUN 2023. [DOI: 10.1080/00986445.2023.2185519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Fiona Mary Antony
- Chemical Engineering Department, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra, India
| | - Kailas L. Wasewar
- Chemical Engineering Department, Visvesvaraya National Institute of Technology (VNIT), Nagpur, Maharashtra, India
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8
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Yang X, Yin ZZ, Zheng G, Zhou M, Zhang H, Li J, Cai W, Kong Y. Molecularly imprinted miniature electrochemical biosensor for SARS-CoV-2 spike protein based on Au nanoparticles and reduced graphene oxide modified acupuncture needle. Bioelectrochemistry 2023; 151:108375. [PMID: 36716516 PMCID: PMC9883973 DOI: 10.1016/j.bioelechem.2023.108375] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/10/2023] [Accepted: 01/20/2023] [Indexed: 01/28/2023]
Abstract
Accurate detection of SARS-CoV-2 spike (SARS-CoV-2-S) protein is of clinical significance for early diagnosis and timely treatment of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Herein, a surface molecularly imprinted miniature biosensor was fabricated. Au nanoparticles (AuNPs), reduced graphene oxide (rGO), poly(methylene blue)/poly(ionic liquids) and poly(ionic liquids) were successively electrodeposited onto the pinpoint of an acupuncture needle (AN). The molecularly imprinted miniature biosensor was obtained after the template of SARS-CoV-2-S protein was removed, which could be used for sensitive detection of SARS-CoV-2-S protein. The linear range and limit of detection (LOD) were 0.1 ∼ 1000 ng mL-1 and 38 pg mL-1, respectively, which were superior to other molecularly imprinted biosensors previously reported. The developed miniature biosensor also exhibited high specificity and stability. The reliability of the biosensor was evaluated by the detection of SARS-CoV-2-S protein in clinical serum samples.
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Affiliation(s)
- Xu Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Zheng-Zhi Yin
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China.
| | - Guojun Zheng
- Department of Clinical Laboratory, Changzhou No.3 People's Hospital, Changzhou 213001, China
| | - Min Zhou
- Department of Clinical Laboratory, Changzhou No.3 People's Hospital, Changzhou 213001, China
| | - Hongyu Zhang
- Department of Clinical Laboratory, Changzhou No.3 People's Hospital, Changzhou 213001, China
| | - Junyao Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China
| | - Wenrong Cai
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China; Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yong Kong
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
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9
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Szpecht A, Zielinski D, Galinski M, Smiglak M. Thermal and Electrochemical Properties of Ionic Liquids Bearing Allyl Group with Sulfonate-Based Anions-Application Potential in Epoxy Resin Curing Process. Molecules 2023; 28:molecules28020709. [PMID: 36677767 PMCID: PMC9864641 DOI: 10.3390/molecules28020709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/03/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023] Open
Abstract
Sulfonate-based ionic liquids (ILs) with allyl-containing cations have been previously obtained by us, however, the present study aims to investigate the thermal, electrochemical and curing properties of these ILs. To determine the temperature range in which ionic liquid maintains a liquid state, thermal properties must be examined using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). Melting, cold crystallization and glass transition temperatures are discussed, as well as decomposition temperatures for imidazolium- and pyridinium-based ionic liquids. The conductivity and electrochemical stability ranges were studied in order to investigate their potential applicability as electrolytes. Finally, the potential of triflate-based ILs as polymerization initiators for epoxy resins was proven.
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Affiliation(s)
- Andrea Szpecht
- Poznan Science and Technology Park, Adam Mickiewicz University Foundation, 61-612 Poznań, Poland
- Correspondence:
| | - Dawid Zielinski
- Poznan Science and Technology Park, Adam Mickiewicz University Foundation, 61-612 Poznań, Poland
- Faculty of Chemistry, Adam Mickiewicz University, 61-614 Poznań, Poland
| | - Maciej Galinski
- Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, 60-965 Poznań, Poland
| | - Marcin Smiglak
- Poznan Science and Technology Park, Adam Mickiewicz University Foundation, 61-612 Poznań, Poland
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10
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Revealing the wetting mechanism of Li+-doped ionic liquids on the TiO2 surface. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2022.118211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Liu Q, Xiao K, Abulimiti B, Xiang M, Wang D, An H, Zheng J. A
DFT
‐based study of the hydrogen‐bonding interactions between epicatechin and methanol/water. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Qifan Liu
- College of Physics and Electronic Engineering Xinjiang Normal University Urumqi China
| | - Kelaiti Xiao
- College of Computer Science and Technology Xinjiang Normal University Urumqi China
| | - Bumaliya Abulimiti
- College of Physics and Electronic Engineering Xinjiang Normal University Urumqi China
| | - Mei Xiang
- College of Physics and Electronic Engineering Xinjiang Normal University Urumqi China
| | - Danqi Wang
- College of Physics and Electronic Engineering Xinjiang Normal University Urumqi China
| | - Han An
- College of Physics and Electronic Engineering Xinjiang Normal University Urumqi China
| | - Jingyan Zheng
- College of Physics and Electronic Engineering Xinjiang Normal University Urumqi China
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12
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Kalhor S, Fattahi A. Design of ionic liquids containing glucose and choline as drug carriers, finding the link between QM and MD studies. Sci Rep 2022; 12:21941. [PMID: 36535965 PMCID: PMC9763358 DOI: 10.1038/s41598-022-25963-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Designing drug delivery systems for therapeutic compounds whose receptors are located in the cytosol of cells is challenging as a bilayer cell membrane is negatively charged. The newly designed drug delivery systems should assist the mentioned drugs in passing the membrane barriers and achieving their targets. This study concentrated on developing novel ionic liquids (ILs) that interact effectively with cell membranes. These ILs are based on glucose-containing choline and are expected to be non-toxic. The binding energies of the known pharmaceutically active ionic liquids were calculated at the B3LYP/6-311++G(d,p) level in the gas phase and compared with those of our newly designed carbohydrate-based ionic liquids. Subsequently, we employed MD simulations to obtain information about the interactions of these known and designed ILs with the cell membrane. In our approach, we adopted QM and MD studies and illustrated that there could be a link between the QM and MD results.
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Affiliation(s)
- Sepideh Kalhor
- grid.412553.40000 0001 0740 9747Department of Chemistry, Sharif University of Technology, Tehran, Iran
| | - Alireza Fattahi
- grid.412553.40000 0001 0740 9747Department of Chemistry, Sharif University of Technology, Tehran, Iran
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13
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Fedorova IV, Yablokov ME, Safonova LP. Quantum-Chemical Study of Acid–Base Interaction between Alkylamines and Different Brønsted Acids. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s003602442212010x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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14
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Kondratenko YA, Makovskaya ON, Antuganov DO, Zolotarev AA, Ugolkov VL, Nadporojskii MA, Kochina TA. Dicationic protic ionic liquids based on N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Structure of ethylammonium hydrogen sulfate protic ionic liquid through DFT calculations and MD simulations: the role of hydrogen bonds. Struct Chem 2022. [DOI: 10.1007/s11224-022-02042-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Chen T, Chen T, Wu X, Xu Y. Effects of the structure on physicochemical properties and CO2 absorption of hydroxypyridine anion-based protic ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119743] [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]
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17
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Computational approaches to structural properties investigation of triethylammonium- and triethanolammonium-based protic ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Kalel RA, Gaikwad DS. Cooperative catalysis: Condensation-aromatization for synthesis of 2-(4-nitrophenyl)-1H-benzimidazole by silica immobilized Brønsted-Lewis acidic ionic liquid (Si-BLAIL). J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Yan F, Guo Y, Wang Z, Zhao L, Zhang X. Efficient separation of CO2/CH4 by ionic liquids confined in graphene oxide: A molecular dynamics simulation. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120736] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Anggraini Y, Yusuf A, Wonorahardjo S, Kurnia D, Viridi S, Magdalena Sutjahja I. Role of C2 Methylation and Anion Type on the Physicochemical and Thermal Properties of Imidazolium-Based Ionic Liquids. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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21
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Wang Y, He H, Wang C, Lu Y, Dong K, Huo F, Zhang S. Insights into Ionic Liquids: From Z-Bonds to Quasi-Liquids. JACS AU 2022; 2:543-561. [PMID: 35373210 PMCID: PMC8965826 DOI: 10.1021/jacsau.1c00538] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Indexed: 05/26/2023]
Abstract
Ionic liquids (ILs) hold great promise in the fields of green chemistry, environmental science, and sustainable technology due to their unique properties, such as a tailorable structure, the various types available, and their environmentally friendly features. On the basis of multiscale simulations and experimental characterizations, two unique features of ILs are as follows: (1) strong coupling interactions between the electrostatic forces and hydrogen bonds, namely in the Z-bond, and (2) the unique semiordered structure and properties of ultrathin films, specifically regarding the quasi-liquid. In accordance with the aforementioned theoretical findings, many cutting-edge applications have been proposed: for example, CO2 capture and conversion, biomass conversion and utilization, and energy storage materials. Although substantial progress has been made recently in the field of ILs, considerable challenges remain in understanding the nature of and devising applications for ILs, especially in terms of e.g. in situ/real-time observation and highly precise multiscale simulations of the Z-bond and quasi-liquid. In this Perspective, we review recent developments and challenges for the IL research community and provide insights into the nature and function of ILs, which will facilitate future applications.
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Affiliation(s)
- Yanlei Wang
- Beijing
Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory
of Multiphase Complex Systems, CAS Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s
Republic of China
| | - Hongyan He
- Beijing
Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory
of Multiphase Complex Systems, CAS Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s
Republic of China
| | - Chenlu Wang
- Beijing
Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory
of Multiphase Complex Systems, CAS Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s
Republic of China
| | - Yumiao Lu
- Beijing
Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory
of Multiphase Complex Systems, CAS Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Kun Dong
- Beijing
Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory
of Multiphase Complex Systems, CAS Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Feng Huo
- Beijing
Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory
of Multiphase Complex Systems, CAS Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Suojiang Zhang
- Beijing
Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory
of Multiphase Complex Systems, CAS Key Laboratory of Green Process
and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- University
of Chinese Academy of Sciences, Beijing 100049, People’s
Republic of China
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22
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Zhao Y, Zhen Y. Looking for life activity in ionic liquids. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Ab Rahim AH, Abd Ghani N, Hasanudin N, Yunus NM, Azman NS. Thermal Kinetics of Monocationic and Dicationic Pyrrolidinium-Based Ionic Liquids. MATERIALS 2022; 15:ma15031247. [PMID: 35161194 PMCID: PMC8840748 DOI: 10.3390/ma15031247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/06/2022] [Accepted: 01/08/2022] [Indexed: 12/10/2022]
Abstract
This work presents an in-depth kinetic thermal degradation comparison between traditional monocationic and the newly developed dicationic ionic liquid (IL), both coupled with a bromide (Br−) anion by using non-isothermal thermogravimetric analysis. Thermal analyses of 1-butyl-1-methylpyrrolidinium bromide [C4MPyr][Br] and 1,4-bis(1-methylpyrrolidinium-1-yl)butane dibromide [BisC4MPyr][Br2] were conducted at a temperature range of 50–650 °C and subjected to various heating rates, which are 5, 10, 15, 20 and 25 °C/min. Thermogravimetric analysis revealed that dicationic IL, [BisC4MPyr][Br2] is less thermally stable compared to monocationic [C4MPyr][Br]. A detailed analysis of kinetic parameters, which are the activation energy (Ea) and pre-exponential factor (log A), was calculated by using Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO) and Starink. This study revealed that the average Ea and log A of [BisC4MPyr][Br2] are lower than [C4MPyr][Br], which may be contributed to by its low thermal stability. Conclusively, it proved that the Ea and log A of ILs are strongly related to the thermal stability of ILs.
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Affiliation(s)
- Asyraf Hanim Ab Rahim
- Centre of Research in Ionic Liquids, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Noraini Abd Ghani
- Centre of Research in Ionic Liquids, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
- Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Noorhafizah Hasanudin
- Centre of Research in Ionic Liquids, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Normawati M Yunus
- Centre of Research in Ionic Liquids, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
- Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
| | - Ninna Sakina Azman
- Centre of Research in Ionic Liquids, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
- Fundamental and Applied Sciences Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia
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24
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Water sorption by ionic liquids: Evidence of a diffusion-controlled sorption process derived from the case study of [BMIm][OAc]. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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The role and the place of ionic liquids in molecularly imprinted polymer-based electrochemical sensors development for sensitive drug assay. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2021.116512] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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Bhattacharjee S, Khan S. Molecular insights into the electrowetting behavior of aqueous ionic liquids. Phys Chem Chem Phys 2022; 24:1803-1813. [PMID: 34985472 DOI: 10.1039/d1cp01821c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular dynamics (MD) simulations were applied to investigate the wettability of aqueous hydrophilic and hydrophobic imidazolium-based ionic liquid (IL) nano-droplets on a graphite surface under a perpendicular electric field. Imminent transformation in the droplet configuration was observed at E = 0.08 V Å-1 both for hydrophobic ILs 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [EMIM][NTF2] and SPC/E water droplets. However, for the hydrophilic IL, 1-ethyl-3-methylimidazolium tetrafluoroborate [EMIM][BF4], the droplet was entirely elongated to column-shaped at E = 0.09 V Å-1 for lower weight percentages of ILs and at E = 0.15 V Å-1 for a higher weight percentage of ILs (i.e., 50 wt%). We explored the impact of the electric field through various parameters such as mass and charge density distribution across the droplet, contact angle of the droplet, orientation of water dipoles, and hydrogen bond analysis. The external electric field was found to influence the orientation of water dipoles and the accumulation of charge at various interfaces was observed with an increase in an electric field, which finally leads to shape deformation and depletion of ions from the liquid-vapor interface of the droplet. However, this behavior strongly depends on the hydrophilicity or hydrophobicity of the ILs and thus, is critically examined for both the ILs.
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Affiliation(s)
- Sanchari Bhattacharjee
- Department of Chemical & Biochemical Engineering, Indian Institute of Technology Patna, Patna, 801103, India.
| | - Sandip Khan
- Department of Chemical & Biochemical Engineering, Indian Institute of Technology Patna, Patna, 801103, India.
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27
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Patil KR, Barge SS, Bhosale BD, Dagade DH. Influence of protic ionic liquids on hydration of glycine based peptides. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 265:120378. [PMID: 34543989 DOI: 10.1016/j.saa.2021.120378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 08/31/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
The structure of water, especially around the solute is thought to play an important role in many biological and chemical processes. Water-peptide and cosolvent-peptide interactions are crucial in determining the structure and function of protein molecules. In this work, we present the H-bonding analysis for model peptides like glycyl-glycine (gly-gly), glycine-ւ-valine (gly-val), glycyl-ւ-leucine (gly-leu) and triglycine (trigly) and triethylammonium based carboxylate protic ionic liquids (PILs) in aqueous solutions as well as for peptides in ∼0.2 mol·L-1 of aqueous PIL solutions in the spectral range of 7800-5500 cm-1 using Fourier transform near-infrared (FT-NIR) spectroscopy at 298.15 K. The hydration numbers for peptides and PILs were obtained using NIR method of simultaneous estimation of hydration spectrum and hydration number of a solute dissolved in water. The H-bond of water molecules around peptides and PILs are found to be stronger and shorter than those in pure liquid water. We observe that the hydration shell around zwitterions is a clathrate-like cluster of water in which ions entrap. Watery network analysis confirms that singly H-bonded species or NHBs changes to partial or distorted ice-like structures of water in the hydration shell of PILs. The overall water H-bonding in the hydration sphere of PILs increases in the order TEAF < TEAA < TEAG < TEAPy ≈ TEAP < TEAB. The influence of PILs on hydration behavior of peptides is explored in terms of H-bonding, cooperativity, hydrophobicity, water structural changes, ionic interactions etc.
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Affiliation(s)
- Kunal R Patil
- Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India
| | - Seema S Barge
- Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India
| | | | - Dilip H Dagade
- Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India.
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28
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Understanding the physicochemical and transport properties of pyrazolium based ionic liquids bearing iodide and triiodide anions. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Shmukler LE, Fedorova IV, Fadeeva Y, Gruzdev MS, Safonova LP. Alkylimidazolium Protic Ionic Liquids: Structural Features and Physicochemical Properties. Chemphyschem 2021; 23:e202100772. [PMID: 34904777 DOI: 10.1002/cphc.202100772] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/04/2021] [Indexed: 11/08/2022]
Abstract
We focus on a series of protic ionic liquids (PILs) with imidazolium and alkylimidazolium (1R3HIm, R = methyl, ethyl, propyl, and butyl) cations. Using the literature data and our experimental results on the thermal and transport properties, we analyze the effects of the anion nature and the alkyl radical length in the cation structure on the above properties. DFT calculations in gas and solvent phase have resulted in microscopic insights into the structure and cation-anion binding in these PILs. We show that the higher thermodynamic stability of an ion pair raises the PIL decomposition temperature. The melting points of the salts with the same cation decrease as the hydrocarbon radical in the cation becomes longer, which correlates with the weaker ion-ion interaction in the ion pairs. A comparative analysis of the protic ILs and corresponding ILs (1R3MeIm) with the same radical (R) in the cation structure and the same anion has been performed. The lower melting points of the ILs with 1R3MeIm cations are assumed to result from the weakening both of the ion-ion interaction and hydrogen bond.
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Affiliation(s)
- Liudmila E Shmukler
- G A Krestov Institute of Solution Chemistry Russian Academy of Sciences: Institut himii rastvorov imeni G A Krestova Rossijskoj akademii nauk, laboratory 1-8, RUSSIAN FEDERATION
| | - Irina V Fedorova
- G A Krestov Institute of Solution Chemistry Russian Academy of Sciences: Institut himii rastvorov imeni G A Krestova Rossijskoj akademii nauk, laboratory 1-8, RUSSIAN FEDERATION
| | - Yuliya Fadeeva
- G A Krestov Institute of Solution Chemistry Russian Academy of Sciences: Institut himii rastvorov imeni G A Krestova Rossijskoj akademii nauk, laboratory 1-8, Akademicheskaya, 1, 153045, Ivanovo, RUSSIAN FEDERATION
| | - Matvey S Gruzdev
- G A Krestov Institute of Solution Chemistry Russian Academy of Sciences: Institut himii rastvorov imeni G A Krestova Rossijskoj akademii nauk, laboratory 1-8, RUSSIAN FEDERATION
| | - Liubov P Safonova
- G A Krestov Institute of Solution Chemistry Russian Academy of Sciences: Institut himii rastvorov imeni G A Krestova Rossijskoj akademii nauk, laboratory 1-8, RUSSIAN FEDERATION
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30
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Wang C, Wang Y, Gan Z, Lu Y, Qian C, Huo F, He H, Zhang S. Topological engineering of two-dimensional ionic liquid islands for high structural stability and CO 2 adsorption selectivity. Chem Sci 2021; 12:15503-15510. [PMID: 35003578 PMCID: PMC8654070 DOI: 10.1039/d1sc05431g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 10/29/2021] [Indexed: 11/21/2022] Open
Abstract
Ionic liquids (ILs) as green solvents and catalysts are highly attractive in the field of chemistry and chemical engineering. Their interfacial assembly structure and function are still far less well understood. Herein, we use coupling first-principles and molecular dynamics simulations to resolve the structure, properties, and function of ILs deposited on the graphite surface. Four different subunits driven by hydrogen bonds are identified first, and can assemble into close-packed and sparsely arranged annular 2D IL islands (2DIIs). Meanwhile, we found that the formation energy and HOMO–LUMO gap decrease exponentially as the island size increases via simulating a series of 2DIIs with different topological features. However, once the size is beyond the critical value, both the structural stability and electrical structure converge. Furthermore, the island edges are found to be dominant adsorption sites for CO2 and better than other pure metal surfaces, showing an ultrahigh adsorption selectivity (up to 99.7%) for CO2 compared with CH4, CO, or N2. Such quantitative structure–function relations of 2DIIs are meaningful for engineering ILs to efficiently promote their applications, such as the capture and conversion of CO2. Multi-scale simulations reveal the structure and properties of the two-dimensional ionic liquid islands supported by graphite, and the island edges show an ultrahigh adsorption selectivity for CO2 compared with CH4, CO, or N2.![]()
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Affiliation(s)
- Chenlu Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China .,University of Chinese Academy of Sciences Beijing 100049 China
| | - Yanlei Wang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China .,University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhongdong Gan
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Yumiao Lu
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Cheng Qian
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology Ulsan 44919 South Korea
| | - Feng Huo
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China
| | - Hongyan He
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China .,University of Chinese Academy of Sciences Beijing 100049 China.,Innovation Academy for Green Manufacture, Chinese Academy of Sciences Beijing 100190 China.,Dalian National Laboratory for Clean Energy Dalian 116023 Liaoning China
| | - Suojiang Zhang
- Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences Beijing 100190 China .,University of Chinese Academy of Sciences Beijing 100049 China
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31
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Daso R, Mitchell SM, Lebedenko CG, Heise RM, Banerjee IA. Exploring the Interactions of Ionic Liquids with Bio-Organic Amphiphiles Using Computational Approaches. ACS OMEGA 2021; 6:32460-32474. [PMID: 34901596 PMCID: PMC8655765 DOI: 10.1021/acsomega.1c03864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 11/03/2021] [Indexed: 06/14/2023]
Abstract
Bio-organic amphiphiles have been shown to effectively impart unique physicochemical properties to ionic liquids resulting in the formation of versatile hybrid composites. In this work, we utilized computational methods to probe the formation and properties of hybrids prepared by mixing three newly designed bio-organic amphiphiles with 14 ionic liquids containing cholinium or glycine betaine cations and a variety of anions. The three amphiphiles were designed such that they contain unique biological moieties found in nature by conjugating (a) malic acid with the amino acid glutamine, (b) thiomalic acid with the antiviral, antibacterial pyrazole compound [3-(3,5-dimethyl-1H-pyrazol-1-yl)benzyl]amine, and (c) Fmoc-protected valine with diphenyl amine. Conductor-like screening model for real solvents (COSMO-RS) was used to obtain sigma profiles of the hybrid mixtures and to predict viscosities and mixing enthalpies of each composite. These results were used to determine optimal ionic liquid-bio-organic amphiphile mixtures. Molecular dynamics simulations of three optimal hybrids were then performed, and the interactions involved in the formation of the hybrids were analyzed. Our results indicated that cholinium-based ILs interacted most favorably with the amphiphiles through a variety of inter- and intramolecular interactions. This work serves to illustrate important factors that influence the interactions between bio-organic amphiphiles and bio-ILs and aids in the development of novel ionic liquid-based composites for a wide variety of potential biological applications.
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32
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Caputo D, Fusco C, Nacci A, Palazzo G, Murgia S, D'Accolti L, Gentile L. A selective cellulose/hemicellulose green solvents extraction from buckwheat chaff. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2021. [DOI: 10.1016/j.carpta.2021.100094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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33
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He Y, Guo Y, Yan F, Yu T, Liu L, Zhang X, Zheng T. Density functional theory study of adsorption of ionic liquids on graphene oxide surface. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116946] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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34
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He X, Zhu J, Tan L, Wang H, Zhou M. Phosphonium ionic liquid-promoted Ce-doped nitrogen-rich TiO 2for degradation gaseous pollutant under visible light irradiation. NANOTECHNOLOGY 2021; 33:075708. [PMID: 34666319 DOI: 10.1088/1361-6528/ac30ef] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
Altering physicochemical properties of TiO2based on modifying the cation and anion structure of ionic liquids (ILs) is of great interests for environment. Up to date, the research involving IL-assisted synthesis of TiO2was focused on imidazolium IL, and much less attention was devoted to IL with other structures. Hence, strategy for preparation of TiO2in phosphonium IL is presented to control the growth of TiO2nanocrystals. The as-prepared noble cerium-doped nitrogen-rich phosphonium IL-TiO2photocatalyst with assisted by tributyl(propyl)phosphonium tetrafluoroborate exhibits a higher specific surface area and smaller crystallite size, which is conducive to the production of more and faster active substance, such as hydroxyl oxygen. When evaluated for photocatalysis of gaseous toluene under visible light irradiation, the sample manifests high degradation rate and efficiency, as well as excellent recycling performance due to the existence of superoxide radical produced by the Ce3+/Ce4+redox reaction. The introduction of phosphonium IL and Ce greatly enhanced charge separation efficiency and promoted production of active substances. Nitrogen also existed in the form of interstitial nitrogen and substituted nitrogen improves its response to visible light. This work shows promising application of phosphonium IL for highly enhanced TiO2photocatalytic performance.
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Affiliation(s)
- Xiaodong He
- School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, People's Republic of China
| | - Jiamei Zhu
- School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, People's Republic of China
| | - Liang Tan
- School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, People's Republic of China
| | - Hongmin Wang
- School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, People's Republic of China
| | - Min Zhou
- School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou, Jiangsu 221116, People's Republic of China
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35
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Ranga PK, Ahmad F, Singh G, Tyagi A, Vijaya Anand R. Recent advances in the organocatalytic applications of cyclopropene- and cyclopropenium-based small molecules. Org Biomol Chem 2021; 19:9541-9564. [PMID: 34704583 DOI: 10.1039/d1ob01549d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The development of novel small molecule-based catalysts for organic transformations has increased noticeably in the last two decades. A very recent addition to this particular research area is cyclopropene- and cyclopropenium-based catalysts. At one point in time, particularly in the mid-20th century, much attention was focused on the structural aspects and physical properties of cyclopropene-based compounds. However, a paradigm shift was observed in the late 20th century, and the focus shifted to the synthetic utility of these compounds. In fact, a wide range of cyclopropene derivatives have been found serving as valuable synthons for the construction of carbocycles, heterocycles and other useful organic compounds. In the last few years, the catalytic applications of cyclopropene/cyclopropenium-based compounds have been uncovered and many synthetic protocols have been developed using cyclopropene-based compounds as organocatalysts. Therefore, the main objective of this review is to highlight recent developments in the catalytic applications of cyclopropene-based small molecules in different areas of organocatalysis such as phase-transfer catalysis (PTC), Brønsted base catalysis, hydrogen-bond donor catalysis, nucleophilic carbene catalysis, and electrophotocatalysis developed within the past two decades.
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Affiliation(s)
- Pavit K Ranga
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Feroz Ahmad
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Gurdeep Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Akshi Tyagi
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
| | - Ramasamy Vijaya Anand
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, Knowledge City, S.A.S Nagar, Manauli (PO), Punjab - 140306, India.
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36
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Pollard VA, Fuentes MA, Robertson SD, Weetman C, Kennedy AR, Brownlie J, Angus FJ, Smylie C, Mulvey RE. Reactivity studies and structural outcomes of a bulky dialkylaluminium amide in the presence of the N-heterocyclic carbene, ItBu. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Abbas Khakiani B, Shirini F, Tajik H, Taherpour Nahzomi H, Daneshvar N. Synthesis, characterization, and physicochemical properties of three new nanostructured benzimidazole-based dicationic Brønsted acidic molten salts and comparison of their catalytic and antibacterial activities. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117104] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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38
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Kou X, Huang Y, Yang Y. Effect of the length and aromaticity of N3-substituent on adsorption performance of imidazolium-based poly(ionic liquids) towards Pd (II). JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126623. [PMID: 34271447 DOI: 10.1016/j.jhazmat.2021.126623] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 06/28/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
Imidazolium-based poly(ionic liquids) (PILs) have been deemed as attractive candidates in the field of precious metal adsorption. However, their further performance optimization is hampered by a lack of an inner understanding of the structure-adsorption performance relationship. In this research, electron and charge distributions of the imidazolium cations are tailored by changing the N3-substitute, and their adsorption performances for PdCl42- were optimized accordingly. Furthermore, the adsorption mechanism is studied by synthesizing corresponding ionic liquid (IL) monomers and their Pd-adducts. Interestingly, longer N3 alkyl chains lead to more hydrogen bonds with PdCl42-, which is beneficial for adsorption. Whereas, it is unfavorable for attracting anions due to a decrease in electrostatic potential (ESP) around cations caused by longer alkyl chains and aromatic substituents at N3 position. It is worth noting that the ESP around the cations plays a more important role in the adsorption process, which determines the adsorption performance of the imidazolium-based PILs. Thus, the performance optimization of imidazolium-based PILs should mainly focus on increasing the ESP of imidazolium cations in the future. This research highlights the potential of the cationic structure-adsorption performance relationship of PILs, which opens a new avenue to develop adsorbents for the metallurgical industry.
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Affiliation(s)
- Xin Kou
- School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China; The Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou 730000, PR China
| | - Yong Huang
- School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China; The Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou 730000, PR China
| | - Ying Yang
- School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China; The Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province, Lanzhou University, Lanzhou 730000, PR China.
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39
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de Souza ÍF, Paschoal VH, Bernardino K, Lima TA, Daemen LL, Z Y, Ribeiro MC. Vibrational spectroscopy and molecular dynamics simulation of choline oxyanions salts. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117100] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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40
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Ionic liquid facilitated melting of the metal-organic framework ZIF-8. Nat Commun 2021; 12:5703. [PMID: 34588462 PMCID: PMC8481281 DOI: 10.1038/s41467-021-25970-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 09/10/2021] [Indexed: 02/08/2023] Open
Abstract
Hybrid glasses from melt-quenched metal-organic frameworks (MOFs) have been emerging as a new class of materials, which combine the functional properties of crystalline MOFs with the processability of glasses. However, only a handful of the crystalline MOFs are meltable. Porosity and metal-linker interaction strength have both been identified as crucial parameters in the trade-off between thermal decomposition of the organic linker and, more desirably, melting. For example, the inability of the prototypical zeolitic imidazolate framework (ZIF) ZIF-8 to melt, is ascribed to the instability of the organic linker upon dissociation from the metal center. Here, we demonstrate that the incorporation of an ionic liquid (IL) into the porous interior of ZIF-8 provides a means to reduce its melting temperature to below its thermal decomposition temperature. Our structural studies show that the prevention of decomposition, and successful melting, is due to the IL interactions stabilizing the rapidly dissociating ZIF-8 linkers upon heating. This understanding may act as a general guide for extending the range of meltable MOF materials and, hence, the chemical and structural variety of MOF-derived glasses.
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Ju Z, Zhou L, Lu X, Li Y, Yao X, Cheng S, Chen G, Ge C. Mechanistic insight into the roles of anions and cations in the degradation of poly(ethylene terephthalate) catalyzed by ionic liquids. Phys Chem Chem Phys 2021; 23:18659-18668. [PMID: 34612403 DOI: 10.1039/d1cp02038b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Ionic liquids (ILs) have shown high catalytic activity in the degradation of poly(ethylene terephthalate) (PET), but the effects of the anions and cations, as well as the mechanism, remain ambiguous. Glycolysis is an important recycling method that converts waste PET into monomers through various chemical reactions. To reveal the role of ILs and the molecular mechanism of the glycolysis of PET, density functional theory (DFT) calculations have been carried out for the possible pathways for the generation of bis(hydroxyethyl)terephthalate (BHET) catalyzed by isolated anions/cations and ion pairs at different sites. The pathway with the lowest barrier for the glycolysis of PET is the cleavage of the C-O ester bond, which generates the BHET monomer. The synergistic effects of the cations and anions play a critical role in the glycolysis of PET. The cations mainly attack the carbonyl oxygen of PET to catalyze the reaction, and the anions mainly form strong H-bonds with PET and ethylene glycol (EG). In terms of the mechanism, the H-bonds render the hydroxyl oxygen of EG more electronegative. The cation coordinates the carbonyl oxygen of the ester, and the hydroxyl oxygen of EG attacks the ester group carbon of PET, with proton transfer to the carbonyl oxygen. A four-membered-ring transition state would be formed by PET, EG, and the IL catalyst, which regularly accelerates the degradation of PET. These results provide fundamental help in understanding the roles of ILs and the mechanism of IL-catalyzed PET degradation.
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Affiliation(s)
- Zhaoyang Ju
- College of Chemical & Material Engineering, Quzhou University, Quzhou 324000, P. R. China.
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Vicent C, Valls A, Escorihuela J, Altava B, Luis S. Unveiling anion-induced folding in tripodal imidazolium receptors by ion-mobility mass spectrometry. Chem Commun (Camb) 2021; 57:8616-8619. [PMID: 34369516 DOI: 10.1039/d1cc02818a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The anion-induced folding of tripodal imidazolium receptors has been investigated by NMR spectroscopy, electrospray ionization ion mobility mass spectrometry and DFT calculations. Such folding can be switched by anion release upon collision induced dissociation.
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Affiliation(s)
- Cristian Vicent
- Servei Central d'Instrumentació Científica (SCIC), Universitat Jaume I, Avda. Sos Baynat s/n, 12006 Castellón, Spain.
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Uddin S, Islam MR, Chowdhury MR, Wakabayashi R, Kamiya N, Moniruzzaman M, Goto M. Lipid-Based Ionic-Liquid-Mediated Nanodispersions as Biocompatible Carriers for the Enhanced Transdermal Delivery of a Peptide Drug. ACS APPLIED BIO MATERIALS 2021; 4:6256-6267. [PMID: 35006923 DOI: 10.1021/acsabm.1c00563] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Lipid-based biocompatible ionic liquids (LBILs) have attracted attention as carriers in transdermal drug delivery systems (TDDSs) because of their lipophilic character. In this study, we report the formulation of a peptide-LBIL complex microencapsulated in an oil phase as a potential carrier for the transdermal delivery of leuprolide acetate as a model hydrophilic peptide. The peptide-LBIL complexes were prepared via a water-in-oil emulsion composed of 1,2-dimyristoyl-sn-glycerol-3-ethyl-phosphatidylcholine (EDMPC), a fatty acid (stearic, oleic, and linoleic acid)-based LBIL, and cyclohexane followed by freeze-drying to remove the water and cyclohexane. Then, the peptide-LBIL complexes were nanodispersed and stabilized in isopropyl myristate (IPM) using sorbitol laurate (Span-20). Ionic-liquid-in-oil nanodispersions (IL/O-NDs) were prepared with varying weight ratios of LBILs and Span-20 as the surfactant and the cosurfactant, respectively. Keeping the overall surfactant constant at 10 wt % in IPM, a 5:5 wt % ratio of surfactant (IL) and cosurfactant (Span-20) in the IL/O-NDs significantly (p < 0.0001) increased the physiochemical stability, drug-loading capacity, and drug encapsulation efficiency. The in vitro and in vivo peptide delivery across the skin was increased significantly (p < 0.0001) using IL/O-NDs, compared with non-IL-treated groups. Of all of the LBIL-based formulations, [EDMPC][Linoleate]/O-ND was considered the most preferable for a TDDS based on the pharmacokinetic parameters. The transdermal delivery flux with [EDMPC][Linoleate]/O-ND was increased 65-fold compared with the aqueous delivery vehicle. The IL/O-NDs were able to deform the lipid and protein arrangements of the skin layers to enhance the transdermal permeation of the peptide. In vitro and in vivo cytotoxicity studies of the IL/O-NDs revealed the biocompatibility of the LBIL-based formulations. These results indicated that IL/O-NDs are promising biocompatible carriers for lipid-peptide TDDSs.
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Affiliation(s)
- Shihab Uddin
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Md Rafiqul Islam
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Department of Applied Chemistry and Chemical Engineering, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Md Raihan Chowdhury
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Rie Wakabayashi
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Advanced Transdermal Drug Delivery System Centre, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Noriho Kamiya
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Advanced Transdermal Drug Delivery System Centre, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Division of Biotechnology, Centre for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Muhammad Moniruzzaman
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, 32610 Seri Iskandar, Perak, Malaysia
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Advanced Transdermal Drug Delivery System Centre, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Division of Biotechnology, Centre for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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Trenzado JL, Rodríguez Y, Gutiérrez A, Cincotti A, Aparicio S. Experimental and molecular modeling study on the binary mixtures of [EMIM][BF4] and [EMIM][TFSI] ionic liquids. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116049] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhang J, Chen Z, Zhang Y, Dong S, Chen Y, Zhang S. Poly(ionic liquid)s Containing Alkoxy Chains and Bis(trifluoromethanesulfonyl)imide Anions as Highly Adhesive Materials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2100962. [PMID: 34117661 DOI: 10.1002/adma.202100962] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/13/2021] [Indexed: 06/12/2023]
Abstract
Adhesive materials have wide applications in diverse fields, but the development of a novel and multipurpose adhesive is a great challenge. This study demonstrates that conventional poly(ionic liquid)s (PILs) can be designed as highly efficient adhesives by simply introducing alkoxy moieties into the cationic backbone of PILs containing bis(trifluoromethanesulfonimide) (TFSI- ) anions. The incorporated flexible alkoxy chain not only reduces the glass transition temperature of PILs but also endows these materials with strong hydrogen bonding interactions, which, together with the unique electrostatic interaction of the PILs, simultaneously contributes to a high cohesive energy and interfacial adhesive energy. Consequently, these alkoxy PILs are highly adhesive on various substrates such as glass, ceramic, stainless steel, aluminum, and polymers, in contrast to the nonadhesive behavior of conventional PILs. Photosensitive or electronically conductive composite adhesives are fabricated by virtue of the compatibility between ionic liquids and carbon nanotubes or silver nanofibers. Interestingly, the PIL-2-TFSI adhesive possesses a unique and reversible response to electric fields and achieves up to 35% improvement in adhesive strength.
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Affiliation(s)
- Jun Zhang
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Zhanying Chen
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Yan Zhang
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
| | - Shengyi Dong
- College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Yufang Chen
- College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, 410073, China
| | - Shiguo Zhang
- College of Materials Science and Engineering, Hunan University, Changsha, 410004, China
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Chen H, Wang Z, Xu X, Gong S, Zhou Y. The molecular behavior of pyridinium/imidazolium based ionic liquids and toluene binary systems. Phys Chem Chem Phys 2021; 23:13300-13309. [PMID: 34095933 DOI: 10.1039/d1cp00874a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imidazolium and pyridinium-based ionic liquids (ILs) have attracted increasing attention in the extraction of aromatic VOCs. However, fundamental studies on the mechanism of capturing aromatic VOCs have been less reported. In this work, the interactions between two ILs, 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIMTFSI) and N-butylpyridinium bis(trifluoromethylsulfonyl)imide (BpyTFSI), and toluene (C6H5CH3), were investigated by using attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), excess infrared spectroscopy, hydrogen nuclear magnetic resonance (1H NMR) spectroscopy and quantum chemical calculations. Some conclusions were obtained as follows: (1) H atoms on EMIMTFSI/BpyTFSI were located above or below the benzene ring and were mainly formed as C2-Hπ bonds and C2,6-Hπ bonds with C6H5CH3, respectively. C-Hπ bonds played a significant role in capturing aromatic compounds. (2) Upon adding C6H5CH3, the two IL-C6H5CH3 system's interaction strength was as follows: EMIMTFSI-C6H5CH3 > BpyTFSI-C6H5CH3. (3) Since C6H5CH3 was unable to disrupt the interactions between cations and anions of ion pairs in the two studied IL-C6H5CH3 systems, only ion cluster-C6H5CH3 and ion pair-C6H5CH3 complexes were observed. This work may provide theoretical insights into the separation mechanism for capturing VOCs.
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Affiliation(s)
- Hong Chen
- Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, College of Chemistry and Chemical Engineering, Instrumental Analysis Center of Qingdao University, Qingdao University, Qingdao 266071, China.
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Palumbo O, Cimini A, Trequattrini F, Brubach JB, Roy P, Paolone A. Evidence of the CH···O HydrogenBonding in Imidazolium-Based Ionic Liquids from Far-Infrared Spectroscopy Measurements and DFT Calculations. Int J Mol Sci 2021; 22:ijms22116155. [PMID: 34200392 PMCID: PMC8201385 DOI: 10.3390/ijms22116155] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/04/2021] [Accepted: 06/04/2021] [Indexed: 12/14/2022] Open
Abstract
Knowledge of all the intermolecular forces occurring in ionic liquids (ILs) is essential to master their properties. Aiming at investigating the weaker hydrogen bonding in aprotic liquids, the present work combined computational study and far-infrared spectroscopy on four imidazolium-based ILs with different anions. The DFT calculations of the ionic couples, using the ωB97X-D functional and considering both the empirical dispersion corrections and the presence of a polar solvent, show that, for all samples, the lowest energy configurations of the ion pair present H atoms, directly bound to C atoms of the cation and close to O atoms of the anion, capable of creating moderate to weak hydrogen bonding with anions. For the liquids containing anions of higher bonding ability, the absorption curves generated from the calculated vibrational frequencies and intensities show absorption bands between 100 and 125 cm−1 corresponding to the stretching of the hydrogen bond. These indications are in complete agreement with the presently reported temperature dependence of the far-infrared spectrum, where the stretching modes of the hydrogen bonding are detected only for samples presenting a moderate interaction and become particularly prominent at low temperatures. Moreover, from the analysis of the infrared spectra, the occurrence of various phase transitions as a function of temperature was detected, and the difference in the average energy between the H-bonded and the dispersion-governed molecular configurations was evaluated.
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Affiliation(s)
- Oriele Palumbo
- CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Rome, Italy; (O.P.); (A.C.); (A.P.)
| | - Adriano Cimini
- CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Rome, Italy; (O.P.); (A.C.); (A.P.)
| | - Francesco Trequattrini
- CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Rome, Italy; (O.P.); (A.C.); (A.P.)
- Physics Department, Sapienza University of Rome, Piazzale A. Moro 5, 00185 Rome, Italy
- Correspondence:
| | - Jean-Blaise Brubach
- Synchrotron SOLEIL, AILES Beamline, L’Orme des Merisiers Saint-Aubin, BP 48, CEDEX, 91192 Gif-sur-Yvette, France; (J.-B.B.); (P.R.)
| | - Pascale Roy
- Synchrotron SOLEIL, AILES Beamline, L’Orme des Merisiers Saint-Aubin, BP 48, CEDEX, 91192 Gif-sur-Yvette, France; (J.-B.B.); (P.R.)
| | - Annalisa Paolone
- CNR-ISC, U.O.S. La Sapienza, Piazzale A. Moro 5, 00185 Rome, Italy; (O.P.); (A.C.); (A.P.)
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Tan L, Zhu J, He X, Zhou M, Zhang S. The mechanism of toluene absorption by phosphonium ionic liquids with multiple sites. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115501] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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