1
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Liu N, Li SB, Zheng YZ, Xu SY, Shen JS. Minimalistic Artificial Catalysts with Esterase-Like Activity from Multivalent Nanofibers Formed by the Self-Assembly of Dipeptides. ACS OMEGA 2023; 8:2491-2500. [PMID: 36687071 PMCID: PMC9851029 DOI: 10.1021/acsomega.2c06972] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Imitating and incorporating the multiple key structural features observed in natural enzymes into a minimalistic molecule to develop an artificial catalyst with outstanding catalytic efficiency is an attractive topic for chemists. Herein, we designed and synthesized one class of minimalistic dipeptide molecules containing a terminal -SH group and a terminal His-Phe dipeptide head linked by a hydrophobic alkyl chain with different lengths, marked as HS-C n+1-His-Phe (n = 4, 7, 11, 15, and 17; n + 1 represents the carbon atom number of the alkyl chain). The His (-imidazole), Phe (-CO2 -) moieties, the terminal -SH group, and a long hydrophobic alkyl chain were found to have important contributions to achieve high binding ability leading to outstanding absolute catalytic efficiency (k cat/K M) toward the hydrolysis reactions of carboxylic ester substrates.
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Affiliation(s)
- Ning Liu
- Xiamen
Key Laboratory of Optoelectronic Materials and Advanced Manufacturing,
College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Shuai-Bing Li
- Xiamen
Key Laboratory of Optoelectronic Materials and Advanced Manufacturing,
College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Yan-Zhen Zheng
- College
of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China
| | - Su-Ying Xu
- State
Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory
of Environmentally Harmful Chemical Analysis, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jiang-Shan Shen
- Xiamen
Key Laboratory of Optoelectronic Materials and Advanced Manufacturing,
College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
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2
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Abdul Rub M, Khan F, Azum N, Marwani HM, Asiri AM, Alamry KA. Effect on micellization behavior of promethazine hydrochloride and dimethyldodecylethylammonium bromide mixture in distinctive media: A multi-technique study. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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3
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Interaction of an imidazolium based ionic liquid with antidepressant drugs: A physicochemical study. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128159] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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4
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Mixed Oxime-Functionalized IL/16-s-16 Gemini Surfactants System: Physicochemical Study and Structural Transitions in the Presence of Promethazine as a Potential Chiral Pollutant. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10020046] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The increasing concern about chiral pharmaceutical pollutants is connected to environmental contamination causing both chronic and acute harmful effects on living organisms. The design and application of sustainable surfactants in the remediation of polluted sites require knowledge of partitioning between surfactants and potential pollutants. The interfacial and thermodynamic properties of two gemini surfactants, namely, alkanediyi-α,ω-bis(dimethylhexadecyl ammonium bromide) (16-s-16, where s = 10, 12), were studied in the presence of the inherently biodegradable oxime-functionalized ionic liquid (IL) 4-((hydroxyimino)methyl)-1-(2-(octylamino)-2-oxoethyl)pyridin-1-ium bromide (4-PyC8) in an aqueous solution using surface tension, conductivity, fluorescence, FTIR and 1H NMR spectroscopic techniques. The conductivity, surface tension and fluorescence measurements indicated that the presence of the IL 4-PyC8 resulted in decreasing CMC and facilitated the aggregation process. The various thermodynamic parameters, interfacial properties, aggregation number and Stern–Volmer constant were also evaluated. The IL 4-PyC8-gemini interactions were studied using DLS, FTIR and NMR spectroscopic techniques. The hydrodynamic diameter of the gemini aggregates in the presence of promethazine (PMZ) as a potential chiral pollutant and the IL 4-PyC8 underwent a transition when the drug was added, from large aggregates (270 nm) to small micelles, which supported the gemini:IL 4-PyC8:promethazine interaction. The structural transitions in the presence of promethazine may be used for designing systems that are responsive to changes in size and shape of the aggregates as an analytical signal for selective detection and binding pollutants.
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5
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Pandya SJ, Kapitanov IV, Banjare MK, Behera K, Borovkov V, Ghosh KK, Karpichev Y. Mixed Oxime-Functionalized IL/16-s-16 Gemini Surfactants System: Physicochemical Study and Structural Transitions in the Presence of Promethazine as a Potential Chiral Pollutant. CHEMOSENSORS 2022; 10:46. [DOI: https:/doi.org/10.3390/chemosensors10020046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2023]
Abstract
The increasing concern about chiral pharmaceutical pollutants is connected to environmental contamination causing both chronic and acute harmful effects on living organisms. The design and application of sustainable surfactants in the remediation of polluted sites require knowledge of partitioning between surfactants and potential pollutants. The interfacial and thermodynamic properties of two gemini surfactants, namely, alkanediyi-α,ω-bis(dimethylhexadecyl ammonium bromide) (16-s-16, where s = 10, 12), were studied in the presence of the inherently biodegradable oxime-functionalized ionic liquid (IL) 4-((hydroxyimino)methyl)-1-(2-(octylamino)-2-oxoethyl)pyridin-1-ium bromide (4-PyC8) in an aqueous solution using surface tension, conductivity, fluorescence, FTIR and 1H NMR spectroscopic techniques. The conductivity, surface tension and fluorescence measurements indicated that the presence of the IL 4-PyC8 resulted in decreasing CMC and facilitated the aggregation process. The various thermodynamic parameters, interfacial properties, aggregation number and Stern–Volmer constant were also evaluated. The IL 4-PyC8-gemini interactions were studied using DLS, FTIR and NMR spectroscopic techniques. The hydrodynamic diameter of the gemini aggregates in the presence of promethazine (PMZ) as a potential chiral pollutant and the IL 4-PyC8 underwent a transition when the drug was added, from large aggregates (270 nm) to small micelles, which supported the gemini:IL 4-PyC8:promethazine interaction. The structural transitions in the presence of promethazine may be used for designing systems that are responsive to changes in size and shape of the aggregates as an analytical signal for selective detection and binding pollutants.
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6
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Bhattacharjee S, Chakraborty D, Khan S. Wetting behavior of aqueous 1-alkyl-3-methylimidazolium tetrafluoroborate {[Cn MIM][BF4] (n = 2, 4, 6)} on graphite surface. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Aqueous solutions of hydroxyl-functionalized ionic liquids: Molecular dynamics studies. J Mol Graph Model 2020; 101:107721. [PMID: 32882635 DOI: 10.1016/j.jmgm.2020.107721] [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: 04/30/2020] [Revised: 07/20/2020] [Accepted: 07/29/2020] [Indexed: 11/21/2022]
Abstract
A series of aqueous solutions of 1-(n-hydroxyalkyl)-3-(n-hydroxyalkyl) imidazolium bromide ([HOCnCmOHIm][Br], with n and m = 2, 6,10 and 14) were studied by atomistic molecular dynamics simulations. Structural properties were characterized by the radial distribution functions between different pairs, angular distributions and aggregation numbers. Dynamics of the system has been investigated by computing the diffusion of the ions and molecules. Structures of the aggregates formed depend upon the length of the hydroxyalkyl chains. The long-distance spatial correlations observed in solutions with cations having long chain substituent are arising due to the formation of intercalated structures. A thin film like structure is formed in solutions having longer hydroxyalkyl chains, with the structure stabilized by the dispersion interactions between the interdigitated alkyl chains and the hydrogen bond formation between the hydroxyl group of a cation with head group of a different cation. Anions are dispersed near the surface of the film.
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8
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Abstract
Abstract
Ionic liquids (ILs) give a wide scope of favorable applications due to their much-upgraded properties. The strong electrostatic interactions between the cationic moiety of IL and the anionic surfactant play a very important role in the assembly of the large aggregates. We have investigated the aggregation behavior of anionic surfactants and IL in aqueous solution. Different temperatures and concentrations of IL have been taken to study the effect on critical micelles concentrations of surfactant. The critical micelle concentration values obtained by conductivity measurements are further confirmed by the fluorescence studies. The method is based on the fit of the experimental obtained raw data of fluorescence spectroscopy to a simple nonlinear category of a Boltzmann type sigmoidal function. Thermodynamical parameters of micellization
Δ
H
m
0
$\Delta H_{m}^{0}$
,
Δ
G
m
0
$\Delta G_{m}^{0}$
and
Δ
S
m
0
$\Delta S_{m}^{0}$
have been considered to study the effect of aqueous IL 1-butyl-3-methylimidazolium bromide concentration and temperature on aggregation behavior of surfactant sodium dodecyl sulfate. FT-IR spectra have been studies to verify the structural changes arise in the aqueous IL and surfactant system.
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9
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Koishi T. Molecular Dynamics Study of the Effect of Water on Hydrophilic and Hydrophobic Ionic Liquids. J Phys Chem B 2018; 122:12342-12350. [PMID: 30507194 DOI: 10.1021/acs.jpcb.8b07774] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We performed molecular dynamics (MD) simulations of ionic liquid (IL)-water mixtures to investigate the effects of water addition. The IL cation 1-butyl-3-methylimidazolium ([C4mim]) and the four anions, nitrate (NO3), tetrafluoroborate (BF4), hexafluorophosphate (PF6), and bis(trifluoromethanesulfonyl)imide (NTf2), were used to examine the effects of differences in hydrophobicity and anion size. The radial distribution functions of water-water have two different water content dependences. In NO3 and BF4 systems, the effect of water-anion-water structures connected by hydrogen bonds due to the strong interaction of anion-water is large. The growth of water clusters changes the peak heights of the radial distribution functions in PF6 and NTf2 systems. The increase in the diffusion constant is small in the NO3 system but is not small in the other systems. The relaxation time of the anion-water hydrogen bonds in the NO3 system is much longer than those in the other systems. It is the reason for the low water content dependency of the diffusion constants of the NO3 system. The water constant dependences of structures in NO3 and BF4 systems are similar, but that in the diffusion constant is not. The BF4 system shows hydrophilic features in the structural change and hydrophobic features in the water content dependences of the diffusion constant. The addition of water molecules provides various hydrophobicity/hydrophilicity of anions.
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Affiliation(s)
- Takahiro Koishi
- Department of Applied Physics , University of Fukui , 3-9-1 Bunkyo , Fukui 910-8507 , Japan
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10
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Banjare MK, Kurrey R, Yadav T, Sinha S, Satnami ML, Ghosh KK. A comparative study on the effect of imidazolium-based ionic liquid on self-aggregation of cationic, anionic and nonionic surfactants studied by surface tension, conductivity, fluorescence and FTIR spectroscopy. J Mol Liq 2017; 241:622-632. [DOI: https:/doi.org/10.1016/j.molliq.2017.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2023]
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11
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A comparative study on the effect of imidazolium-based ionic liquid on self-aggregation of cationic, anionic and nonionic surfactants studied by surface tension, conductivity, fluorescence and FTIR spectroscopy. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.06.009] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Ma H, Ke H, Wang T, Xiao J, Du N, Yu L. Self-assembly of imidazolium-based surface active ionic liquids in aqueous solution: The role of different substituent group on aromatic counterions. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.05.116] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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13
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Affiliation(s)
- Kun Dong
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaomin Liu
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Haifeng Dong
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiangping Zhang
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Suojiang Zhang
- State Key Laboratory of Multiphase
Complex Systems, Beijing Key Laboratory of Ionic Liquids Clean Process,
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
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14
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Wang JY, Su YL, Wu BH, Cheng SH. Reusable electrochemical sensor for bisphenol A based on ionic liquid functionalized conducting polymer platform. Talanta 2016; 147:103-10. [DOI: 10.1016/j.talanta.2015.09.035] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 09/11/2015] [Accepted: 09/12/2015] [Indexed: 01/25/2023]
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15
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Bešter-Rogač M, Fedotova MV, Kruchinin SE, Klähn M. Mobility and association of ions in aqueous solutions: the case of imidazolium based ionic liquids. Phys Chem Chem Phys 2016; 18:28594-28605. [DOI: 10.1039/c6cp05010g] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combining MD simulations and RISM calculations with experiments, we demonstrated that the interionic interactions of investigated ILs as model 1,1 electrolytes in water solutions are weak but evidently dependent on the molecular structure.
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Affiliation(s)
| | | | | | - Marco Klähn
- Institute of Chemical and Engineering Sciences
- Agency for Science
- Technology and Research
- Singapore
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16
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Palchowdhury S, Bhargava BL. Self-Assembly of Cations in Aqueous Solutions of Hydroxyl-Functionalized Ionic Liquids: Molecular Dynamics Studies. J Phys Chem B 2015; 119:11815-24. [DOI: 10.1021/acs.jpcb.5b06151] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Sourav Palchowdhury
- School of Chemical Sciences, National Institute of Science Education & Research, Bhubaneswar 751005, Odisha, India
| | - B. L. Bhargava
- School of Chemical Sciences, National Institute of Science Education & Research, Bhubaneswar 751005, Odisha, India
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17
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Affiliation(s)
- Robert Hayes
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
| | - Gregory G. Warr
- School
of Chemistry, The University of Sydney, NSW 2006, Sydney, Australia
| | - Rob Atkin
- Discipline
of Chemistry, The University of Newcastle, NSW 2308, Callaghan, Australia
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18
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Palchowdhury S, Bhargava BL. Effect of spacer chain length on the liquid structure of aqueous dicationic ionic liquid solutions: molecular dynamics studies. Phys Chem Chem Phys 2015; 17:11627-37. [DOI: 10.1039/c5cp00873e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Cations in an aqueous [C16(MIm)2][2Br] solution aggregate spontaneously to form micelles, with a hydrophobic core composed of spacer alkyl chains and a hydrophilic surface composed of imidazolium head groups.
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Affiliation(s)
- Sourav Palchowdhury
- School of Chemical Sciences
- National Institute of Science Education & Research
- Bhubaneswar-751005
- India
| | - B. L. Bhargava
- School of Chemical Sciences
- National Institute of Science Education & Research
- Bhubaneswar-751005
- India
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19
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Palchowdhury S, Bhargava BL. Ionic liquids at nonane-water interfaces: molecular dynamics studies. J Phys Chem B 2014; 118:13930-9. [PMID: 25387241 DOI: 10.1021/jp508950k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The structures of ternary systems with water, nonane, and an ionic liquid, with the ionic liquid placed between water and nonane, have been studied using atomistic molecular dynamics simulations. Three different ionic liquids with 1-n-butyl-3-methylimidazolium cation and bromide, tetrafluoroborate, and trifluoromethanesulfonate anions have been studied. The ionic liquids disperse into the aqueous phase quickly and are solubilized in water within 15 ns to form two equivalent nonane-aqueous ionic liquid interfaces. The interfacial region is enriched with ionic liquids due to the amphiphilicity of the cations. The presence of ionic liquids at the interface reduces the interfacial tension between the nonane and water, thus facilitating the mixing of aqueous and nonane phases. The reduction in the interfacial tension is found to be inversely related to the solubility of the corresponding ionic liquid in water. The butyl chains of the cations and the trifluoromethanesulfonate anions present in the interfacial region are found to be preferentially oriented parallel to the interface normal.
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Affiliation(s)
- Sourav Palchowdhury
- School of Chemical Sciences, National Institute of Science Education & Research , Bhubaneswar - 751005, Odisha, India
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