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Shokri S, Ebrahimi N, Sadeghi R. Combined experimental and computational investigation of tetrabutylammonium bromide-carboxylic acid-based deep eutectic solvents. J Mol Graph Model 2024; 131:108805. [PMID: 38838616 DOI: 10.1016/j.jmgm.2024.108805] [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: 04/16/2024] [Revised: 05/26/2024] [Accepted: 05/28/2024] [Indexed: 06/07/2024]
Abstract
Aiming at shedding light on the molecular interactions in deep eutectic solvents (DESs), the DESs based on tetrabutylammonium bromide (TBAB) as hydrogen bond acceptor (HBA) and carboxylic acids (CAs) (formic acid (FA), oxalic acid (OA), and malonic acid (MA)) as hydrogen bond donor (HBD) were investigated by both experimental and theoretical techniques. The thermal behaviors of the prepared DESs were investigated by differential scanning calorimetry (DSC) method. In order to study the hydrogen bond formation between the DESs constituents, the FT-IR analysis was carried out. The large positive deviations of the iso solvent activity lines of ternary HBA + HBD + 2-propanol mixtures determined by the isopiestic technique from the semi-ideal behavior indicate that CAs interact strongly with TBAB and therefore they can form DESs. Molecular dynamics (MD) simulations were performed to present an atomic-scale image of the components and describe the microstructure of DESs. From the MD simulations, the radial distribution functions (RDFs), coordination numbers (CNs), combined distribution functions (CDFs), and spatial distribution functions (SDFs) were calculated to investigate the interaction between the components and three-dimensional visualization of the DESs. The obtained results confirmed the importance of hydrogen bonds in the formation of TBAB/CAs DESs.
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Affiliation(s)
- Sahar Shokri
- Department of Chemistry, University of Kurdistan, Sanandaj, 66177-15175, Iran
| | - Nosaibah Ebrahimi
- Department of Chemistry, University of Kurdistan, Sanandaj, 66177-15175, Iran
| | - Rahmat Sadeghi
- Department of Chemistry, University of Kurdistan, Sanandaj, 66177-15175, Iran.
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Di Muzio S, Trequattrini F, Palumbo O, Roy P, Brubach JB, Paolone A. An Eutectic Mixture in the Tetrabutylammonium Bromide-Octanol System: Macroscopic and Microscopic Points of View. Chemphyschem 2024:e202400219. [PMID: 38726706 DOI: 10.1002/cphc.202400219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/29/2024] [Indexed: 06/21/2024]
Abstract
An eutectic mixture of tetrabutylammonium bromide and octanol in the molar ratio 1-10 exhibited a melting point of -17 °C. This system was investigated by means of infrared spectroscopy, in the liquid and in the solid state. Classical molecular dynamics was performed to study the fine details of the hydrogen bond interactions established in the mixture. Both octanol and the mixtures displayed an almost featureless far-infrared spectrum in the liquid state but it becomes highly structured in the solid phase. DFT calculations suggest that new vibrational modes appearing in the mixture at low temperatures may be related to the population of the higher energy conformers of the alcohol. Mid-infrared spectroscopy measurements evidenced no shift of the CH stretching bands in the mixture compared to the starting materials, while the OH stretching are blue shifted by a few cm-1. Consistently, molecular dynamics provides a picture of the mixture in which part of the hydrogen bonds (HB) of pure octanol is replaced by weaker HB formed with the Br anion. Due to these interactions the ionic couple becomes more separated. In agreement with this model, the lengths of all HB are much larger than those observed in mixtures containing acids reported in previous studies.
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Affiliation(s)
- Simone Di Muzio
- Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Piazzale Aldo Moro 5, 00185, Rome, Italy
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Francesco Trequattrini
- Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Piazzale Aldo Moro 5, 00185, Rome, Italy
- Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Oriele Palumbo
- Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Pascale Roy
- Synchrotron Soleil, L'Orme des Merisier, 91190, Saint-Aubin, France
| | | | - Annalisa Paolone
- Istituto dei Sistemi Complessi, Consiglio Nazionale delle Ricerche, Piazzale Aldo Moro 5, 00185, Rome, Italy
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Sahoo CP, Panda DK, Bhargava BL. Computational insight into the effect of alkyl chain length in tetraalkylammonium-based deep eutectic solvents. J Mol Graph Model 2024; 128:108717. [PMID: 38281418 DOI: 10.1016/j.jmgm.2024.108717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 01/30/2024]
Abstract
The effect of the increase in the alkyl chain length of cation on the properties of deep eutectic solvents based on ethylene glycol has been investigated employing classical molecular dynamics simulations. The change in the structural and dynamic properties in both the bulk and liquid-vapor interface is explored through various analyses. The interaction between the anion and the ethylene glycol increases with an increase in the alkyl chain length of the cation, as observed in the increase of the lifetime of the hydrogen bond formed between the two. The terminal carbon atoms are found to be closer to each other when the cation changes from tetraethylammonium to tetrabutylammonium. The cations are located closer to the interface, and the association of the alkyl chains becomes more significant with increased alkyl chain length, decreasing the surface tension values.
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Affiliation(s)
- Chandan Prasad Sahoo
- School of Chemical Sciences, National Institute of Science Education & Research, An OCC of Homi Bhabha National Institute, P.O.: Jatni, Khurda, Odisha 752050, India
| | - Deepak Kumar Panda
- School of Chemical Sciences, National Institute of Science Education & Research, An OCC of Homi Bhabha National Institute, P.O.: Jatni, Khurda, Odisha 752050, India
| | - B L Bhargava
- School of Chemical Sciences, National Institute of Science Education & Research, An OCC of Homi Bhabha National Institute, P.O.: Jatni, Khurda, Odisha 752050, India.
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Bian Y, Zhang Y, Liu T, Zhang F, Gao HY. Room-temperature synthesis of imine-linked magnetic covalent organic polymers in deep eutectic solvents for the extraction of flavonoids and their determination with HPLC-MS/MS. Mikrochim Acta 2023; 190:424. [PMID: 37776373 DOI: 10.1007/s00604-023-05976-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/28/2023] [Indexed: 10/02/2023]
Abstract
A novel imine-linked magnetic covalent organic polymer, Fe3O4@TAB-TFPT, was synthesized using environmentally friendly deep eutectic solvents as the reaction medium instead of conventional organic solvents. The materials were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), FT-IR, N2 adsorption-desorption isotherms, energy dispersive spectrometer (EDS), X-ray photoelectron spectra (XPS), and thermo gravimetric analysis (TGA). Subsequently, the materials were employed as an adsorbent for magnetic solid-phase extraction (MSPE) of flavonoids, including Kurarinone, Norkurarinone, Xanthohumol, and Isoxanthohumol, prior to their determination by HPLC-MS/MS. The validation results demonstrate good linearity within the concentration range 0.1-1000 ng∙mL-1 (R2 ≥ 0.9963), high enrichment factors ranging from 18.9 to 30.7, and low LODs (0.01-0.05 ng∙mL-1) and LOQs (0.05-0.1 ng∙mL-1). Furthermore, recoveries between 80.60% and 108.40% with relative standard deviations ≤ 8.49% were achieved. The proposed MSPE-HPLC-MS/MS method was successfully applied to the determination of flavonoids in Sophora flavescens Aition sample.
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Affiliation(s)
- Yu Bian
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China
| | - Yuan Zhang
- School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - Tong Liu
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China
| | - Feng Zhang
- Institute of Food Safety, Chinese Academy of Inspection & Quarantine, Beijing, 100176, China.
- Key Laboratory of Food Quality and Safety for State Market Regulation, Beijing, 100176, China.
| | - Hui-Yuan Gao
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, 110016, China.
- Key Laboratory of Structure-Based Drug Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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Chowdhury UD, Malayil I, Bhargava BL. Understanding the screening effect of aqueous DES on the IDPs: A molecular dynamics simulation study using amyloid β 42 monomer. J Mol Graph Model 2023; 119:108398. [PMID: 36542916 DOI: 10.1016/j.jmgm.2022.108398] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/16/2022] [Accepted: 12/12/2022] [Indexed: 12/16/2022]
Abstract
Deep eutectic solvents (DESs) have emerged as the promising replacement to the ionic liquids in solvent engineering for bio-compatibility. We aim to understand the effect of aqueous deep eutectic solvents on the conformation of intrinsically disordered proteins (IDPs). In this context, we have studied the effect on amyloid beta (Aβ42) monomer in the hydrated DES composed of tetrabutylammonium chloride and ethylene glycol in a 3:1 ratio using all-atom molecular dynamics simulations. DES is found to effectively screen the interaction of four zones of the amyloid beta monomer with water. Water molecules and the DES constituents modulate the local protein-solvent interactions, in the solvation shell of the protein. In addition, the aqueous DES medium conserves the secondary structure of the Aβ42 monomer by increasing the intramolecular hydrogen bonding and D23-K28 salt-bridge interactions when compared to the pure water medium. The current study provides insights into the impact of DES in stabilizing an IDP, at molecular level. We envisage the hindered aggregation of the amyloid beta structures in DES medium over the pure water medium due to the screening of hydrophobic intramolecular interactions.
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Affiliation(s)
- Unmesh D Chowdhury
- School of Chemical Sciences, National Institute of Science Education & Research-Bhubaneswar, an OCC of Homi Bhabha National Institute, P.O. Jatni, Khurda, Odisha 752050, India
| | - Insha Malayil
- School of Chemical Sciences, National Institute of Science Education & Research-Bhubaneswar, an OCC of Homi Bhabha National Institute, P.O. Jatni, Khurda, Odisha 752050, India
| | - B L Bhargava
- School of Chemical Sciences, National Institute of Science Education & Research-Bhubaneswar, an OCC of Homi Bhabha National Institute, P.O. Jatni, Khurda, Odisha 752050, India.
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A separation strategy of Au(III), Pd(II) and Pt(IV) based on hydrophobic deep eutectic solvent from hydrochloric acid media. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Shishov A, Makoś-Chełstowska P, Bulatov A, Andruch V. Deep Eutectic Solvents or Eutectic Mixtures? Characterization of Tetrabutylammonium Bromide and Nonanoic Acid Mixtures. J Phys Chem B 2022; 126:3889-3896. [PMID: 35608166 PMCID: PMC9169048 DOI: 10.1021/acs.jpcb.2c00858] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Deep eutectic solvents
have quickly attracted the attention of
researchers because they better meet the requirements of green chemistry
and thus have the potential to replace conventional hazardous organic
solvents in some areas. To better understand the nature of these mixtures,
as well as expand the possibilities of their use in different industries,
a detailed examination of their physical properties, such as density,
viscosity, the nature of the interactions between their constituents,
the phase diagrams, depression of their melting point, and interpretation
of these results is necessary. In this work, the mixtures of tetrabutylammonium
bromide (TBAB) and nonanoic acid (NA) in different molar ratios are
theoretically and experimentally investigated by applying a phase
diagram constructed on the basis of differential scanning calorimetry
measurements and COSMO-RS model. Spectral properties are investigated
based on Fourier transform infrared spectroscopy and density functional
theory. The observed eutectic point indicates the formation of a DES
in the TBAB−NA system in a 1:2 molar ratio. This is due to
the presence of hydrogen bonds between the carboxyl group from the
NA molecule and the bromine atom from the TBAB molecule. Other eutectic
mixtures are most likely the solutions of TBAB in NA, in which hydrogen
bonds predominate between acid molecules.
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Affiliation(s)
- Andrey Shishov
- Institute of Chemistry, Saint Petersburg State University, RU-198504 Saint Petersburg, Russia
| | - Patrycja Makoś-Chełstowska
- Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdańsk University of Technology, 80-233 Gdańsk, Poland.,EcoTech Center, Research Centre, Gdańsk University of Technology, G. Narutowicza St. 11/12, 80-233 Gdańsk, Poland
| | - Andrey Bulatov
- Institute of Chemistry, Saint Petersburg State University, RU-198504 Saint Petersburg, Russia
| | - Vasil Andruch
- Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, Pavol Jozef Šafárik University in Košice, SK-04154 Košice, Slovak Republic
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