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Bharmoria P, Tietze AA, Mondal D, Kang TS, Kumar A, Freire MG. Do Ionic Liquids Exhibit the Required Characteristics to Dissolve, Extract, Stabilize, and Purify Proteins? Past-Present-Future Assessment. Chem Rev 2024; 124:3037-3084. [PMID: 38437627 PMCID: PMC10979405 DOI: 10.1021/acs.chemrev.3c00551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 02/08/2024] [Accepted: 02/19/2024] [Indexed: 03/06/2024]
Abstract
Proteins are highly labile molecules, thus requiring the presence of appropriate solvents and excipients in their liquid milieu to keep their stability and biological activity. In this field, ionic liquids (ILs) have gained momentum in the past years, with a relevant number of works reporting their successful use to dissolve, stabilize, extract, and purify proteins. Different approaches in protein-IL systems have been reported, namely, proteins dissolved in (i) neat ILs, (ii) ILs as co-solvents, (iii) ILs as adjuvants, (iv) ILs as surfactants, (v) ILs as phase-forming components of aqueous biphasic systems, and (vi) IL-polymer-protein/peptide conjugates. Herein, we critically analyze the works published to date and provide a comprehensive understanding of the IL-protein interactions affecting the stability, conformational alteration, unfolding, misfolding, and refolding of proteins while providing directions for future studies in view of imminent applications. Overall, it has been found that the stability or purification of proteins by ILs is bispecific and depends on the structure of both the IL and the protein. The most promising IL-protein systems are identified, which is valuable when foreseeing market applications of ILs, e.g., in "protein packaging" and "detergent applications". Future directions and other possibilities of IL-protein systems in light-harvesting and biotechnology/biomedical applications are discussed.
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Affiliation(s)
- Pankaj Bharmoria
- CICECO
- Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
- Department
of Smart Molecular, Inorganic and Hybrid Materials, Institute of Materials Science of Barcelona (ICMAB-CSIC), 08193 Bellaterra, Barcelona, Spain
- Department
of Chemistry and Molecular Biology, Wallenberg Centre for Molecular
and Translational Medicine, University of
Gothenburg, SE-412 96 Göteborg, Sweden
| | - Alesia A. Tietze
- Department
of Chemistry and Molecular Biology, Wallenberg Centre for Molecular
and Translational Medicine, University of
Gothenburg, SE-412 96 Göteborg, Sweden
| | - Dibyendu Mondal
- CICECO
- Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
- Institute
of Plant Genetics (IPG), Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland
- Centre
for Nano and Material Sciences, JAIN (Deemed-to-be
University), Jain Global
Campus, Bangalore 562112, India
| | - Tejwant Singh Kang
- Department
of Chemistry, UGC Center for Advance Studies-II,
Guru Nanak Dev University (GNDU), Amritsar 143005, Punjab, India
| | - Arvind Kumar
- Salt
and Marine Chemicals Division, CSIR-Central
Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, Gujarat, India
| | - Mara G Freire
- CICECO
- Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
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2
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Delineating molecular interactions within surface active ionic liquids + tartrazine dye solutions: A comparative study with conventional surfactant-DTAC. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132798] [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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3
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Ullah S, Zhang P, Wang Y, Chen Z, Wang C, Liu C, Xu B. Effect of electrolytes on the interfacial rheological behaviors of N-cocoyl glycinate. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2020.1844736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Sana Ullah
- School of Light Industry, Beijing Technology and Business University, Beijing, P. R. China
| | - Pingping Zhang
- School of Light Industry, Beijing Technology and Business University, Beijing, P. R. China
| | - Yuzhao Wang
- School of Light Industry, Beijing Technology and Business University, Beijing, P. R. China
| | - Zhenghong Chen
- School of Light Industry, Beijing Technology and Business University, Beijing, P. R. China
| | - Ce Wang
- School of Light Industry, Beijing Technology and Business University, Beijing, P. R. China
| | - Changyao Liu
- School of Light Industry, Beijing Technology and Business University, Beijing, P. R. China
| | - Baocai Xu
- School of Light Industry, Beijing Technology and Business University, Beijing, P. R. China
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5
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Interaction of ionic liquids with human serum albumin in the view of bioconcentration: a preliminary study. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-02021-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
AbstractBioaccumulation potential is critical in PBT and risk assessment of chemicals. However, for ionic liquids (ILs), this aspect remains neglected. It is especially important to fill this gap, because for this group of compounds, existing data confirm their risk of being environmentally persistent and toxicity. Moreover, considering preliminary reports on the interactions of ILs with lipids, it may be assumed that ILs have a higher potential for bioaccumulation than indicated by previous estimations built upon octanol–water partition coefficients. Moreover, the bioconcentration of ionizable chemical compounds may also be strongly related to plasma protein contents. Therefore, in this work, the affinity of a set of imidazolium cations and organic anions, and their combination to human serum albumin (HSA) was determined. The obtained results reveal that both cations and anions can be strongly bound to HSA, and blood proteins might play an important role in overall bioaccumulation. Furthermore, it was observed that HSA binding properties towards IL cations depend on the hydrophobicity of cations. The obtained data also provide indication that cation–anion interaction may affect ILs ions affinity to HSA.
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Bai Y, Zeng X, Zhang C, Zhang T, Wang C, Han M, Zhou G, Xu X. Effects of high hydrostatic pressure treatment on the emulsifying behavior of myosin and its underlying mechanism. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111397] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Cao H, Hu Y, Xu W, Wang Y, Guo X. Recent progress in the assembly behavior of imidazolium-based ionic liquid surfactants. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114354] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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8
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Ullah S, Yao K, Zhang P, Wang Y, Chen Z, Liu C, Wang C, Xu B. Effect of Added Tetraalkylammonium Counterions on the Dilational Rheological Behaviors of N-Cocoyl Glycinate. J Oleo Sci 2020; 69:883-891. [PMID: 32641611 DOI: 10.5650/jos.ess20031] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Ion specific effect, which is also known as Hofmeister effect, has been reported in numerous systems including ionic surfactant aggregates. Acyl amino acid surfactants have attracted growing attentions in the field of novel surfactants research due to their environmentally benign characteristics. The objective of this study was to investigate the effect of different salts containing NH4+ and tetraalkylammonium (TAA+), where alkyl = methyl (TMA+), ethyl (TEA+), and propyl (TPA+), cations on the dilational rheological properties of interfacial film are stabilized by potassium N-cocoyl glycinate (KCGl). The interfacial behaviors were studied using oscillating drop shape analysis method. The interfacial tensions (IFTs) and dilational rheological parameters results illustrate that KCGl in the presence of salts has better interfacial activity and stronger intermolecular interaction, indicating that added cations contribute to denser molecular packing at oil-water interface. Ion specific effects were observed in the system. Among the cations, KCGl shows highest dilational modulus in the presence of NH4+. The overall interaction between cations and headgroups of KCGl decreases in the sequence NH4+ >TMA+ >TEA+ ≈TPA+, which follows Hofmeister series. The increasing hydrophobicity of TAA+ prevents the interaction between cations and KCGl's headgroup, and therefore prevent amphiphiles from packing closely at interface. The results present a theoretical origin for useful application of KCGl in cosmetics, petroleum and daily chemical industries.
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Affiliation(s)
- Sana Ullah
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
| | - Kaixin Yao
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
| | - Pingping Zhang
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
| | - Yuzhao Wang
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
| | - Zhenghong Chen
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
| | - Changyao Liu
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
| | - Ce Wang
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
| | - Baocai Xu
- Department of Applied Chemistry, Beijing Key Laboratory of Flavor Chemistry, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Technology and Business University
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9
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Li ZY, Wang YF, Cao XL, Guo LL, Zhang L, Zhang L. Studies of interfacial interactions between petroleum acids and associating polyacrylamide by dilational rheological measurements. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2019.1623685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Zong-Yang Li
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, P. R. China
- Exploration & Development, Research Institute of Shengli Oilfield Co. Ltd, SINOPEC, Dongying, Shandong, P. R. China
| | - Ye-Fei Wang
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong, P. R. China
| | - Xu-Long Cao
- Exploration & Development, Research Institute of Shengli Oilfield Co. Ltd, SINOPEC, Dongying, Shandong, P. R. China
| | - Lan-Lei Guo
- Exploration & Development, Research Institute of Shengli Oilfield Co. Ltd, SINOPEC, Dongying, Shandong, P. R. China
| | - Lei Zhang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
| | - Lu Zhang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, P. R. China
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10
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Lei J, Gao Y, Ma Y, Zhao K, Du F. Improving the emulsion stability by regulation of dilational rheology properties. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123906] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Chen Z, Zhang P, Sun Y, Wang C, Xu B. Interfacial Dilational Rheology of Sodium Lauryl Glycine and Mixtures with Conventional Surfactants. J SURFACTANTS DETERG 2019. [DOI: 10.1002/jsde.12312] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhenghong Chen
- School of Food and Chemical EngineeringBeijing Technology and Business University Beijing 100048 P. R. China
| | - Pingping Zhang
- School of Food and Chemical EngineeringBeijing Technology and Business University Beijing 100048 P. R. China
| | - Yimeng Sun
- School of Food and Chemical EngineeringBeijing Technology and Business University Beijing 100048 P. R. China
| | - Ce Wang
- School of Food and Chemical EngineeringBeijing Technology and Business University Beijing 100048 P. R. China
| | - Baocai Xu
- School of Food and Chemical EngineeringBeijing Technology and Business University Beijing 100048 P. R. China
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12
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The dilational rheology and splashing behavior of ionic liquid-type imidazolium Gemini surfactant solutions: Impact of alkyl chain length. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.03.146] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Li N, Zhang Y, Huang B, Li H. Ultrasonic dispersion temperature- and pH-tuned spectral and electrochemical properties of bovine serum albumin on carbon nanotubes and its conformational transition. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.11.089] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Cao C, Zhou ZL, Cao LD, Zheng L, Xu J, Li FM, Huang QL. Influence of the surface limiting elasticity modulus on the impact behavior of droplets of difenoconazole-loaded mesoporous silica nanoparticles with associated SDS. SOFT MATTER 2018; 14:6070-6075. [PMID: 29987304 DOI: 10.1039/c8sm01196f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The relation between the surface limiting elasticity modulus, ε0, of difenoconazole-loaded mesoporous silica nanoparticle (DF-MSN) formulations with associated SDS and the height of the first returning droplet impacting on cabbage and rice leaf surfaces was investigated. The surface dilational rheology properties were determined by means of surface tension relaxation. The impact of a droplet on the leaf surface was recorded with a high-speed camera. The surface limiting elasticity modulus, ε0, shows differences with different SDS concentrations. A positive correlation between droplet first rebound height and the surface limiting elasticity modulus, ε0, is observed. The pesticide droplet impact on the target leaf surface is a rather complex phenomenon, so the focus of this article is to establish a relationship between the surface limiting elasticity modulus, ε0, and droplet first rebound height. These findings introduce a chemical way to affect the impact behavior of pesticide droplets on target crop leaf surfaces, which may be of particular importance for pesticide spraying and crop protection, especially for hydrophobic and superhydrophobic target crops.
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Affiliation(s)
- Chong Cao
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, No. 2 Yuanmingyuan West Road, Beijing 100193, China.
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15
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Cao C, Cao LD, Huang QL, Du FP. Impact of imidazolium-based ionic liquid surfactant additions on dilational rheology properties of different protein adsorption layer. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2017.1281143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Chong Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Li-Dong Cao
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Qi-Liang Huang
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Feng-Pei Du
- Department of Applied Chemistry, College of Science, China Agriculture University, Beijing, China
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16
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Lai L, Wei XQ, Huang WH, Mei P, Ren ZH, Liu Y. Impact of carbon quantum dots on dynamic properties of BSA and BSA/DPPC adsorption layers. J Colloid Interface Sci 2017; 506:245-254. [DOI: 10.1016/j.jcis.2017.07.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 07/09/2017] [Accepted: 07/15/2017] [Indexed: 10/19/2022]
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17
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Mei QX, Lai L, Zhou ZQ, Mei P, Ren ZH, Zheng YC, Liu Y. Impact of multiple quaternary ammonium salts on dynamic properties of BSA adsorption layer at different pH values. SOFT MATTER 2017; 13:7273-7282. [PMID: 28990032 DOI: 10.1039/c7sm01607g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The interaction mechanism of multiple quaternary ammonium salts (MQAS) with bovine serum albumin (BSA) was examined by the fluorescence quenching method and circular dichroism (CD) spectra. Moreover, the effects of MQAS on the dynamic properties of BSA adsorption layers at different pH values were investigated using dilational interfacial rheology. Results show that the quenching constants increase with an increase in pH values and decrease with an increase in the experiment temperature at pH 5.3. The quenching mechanism is static quenching, and the electrostatic force dominates the interaction between MQAS and BSA at pH 5.3. Due to three positive head groups, MQAS can significantly affect the dynamic interfacial activity of BSA molecules at a relatively low concentration. At pH 4.3, the electrostatic repulsion is unfavorable for the formation of MQAS/BSA complexes. Consequently, MQAS molecules will replace BSA molecules from the interface by competitive adsorption. At the pH value above the isoelectric point of BSA, the electrostatic attraction is better for the formation of MQAS/BSA complexes, which exhibit a rapid adsorption rate and an enhanced interfacial activity. Moreover, the kinetic dependencies of interfacial dilational elasticity for the MQAS/BSA mixtures become nonmonotonous. The appearance of the maximum interfacial elasticity values can be attributed to the formation of tails and loops, which suggests that the addition of MQAS destroys the secondary and tertiary structure of protein in the bulk phase. In addition, the effects of MQAS on the secondary structure of protein were demonstrated by CD spectra.
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Affiliation(s)
- Qi-Xiang Mei
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, P. R. China.
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18
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Cao C, Zhou ZL, Zheng L, Huang QL, Du FP. Dilational rheology of different globular protein with imidazolium-based ionic liquid surfactant adsorption layer at the decane/water interface. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.121] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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19
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Kumar A, Bisht M, Venkatesu P. Biocompatibility of ionic liquids towards protein stability: A comprehensive overview on the current understanding and their implications. Int J Biol Macromol 2017; 96:611-651. [DOI: 10.1016/j.ijbiomac.2016.12.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 10/20/2022]
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20
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Bhadani A, Misono T, Singh S, Sakai K, Sakai H, Abe M. Structural diversity, physicochemical properties and application of imidazolium surfactants: Recent advances. Adv Colloid Interface Sci 2016; 231:36-58. [PMID: 27063924 DOI: 10.1016/j.cis.2016.03.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 01/19/2016] [Accepted: 03/21/2016] [Indexed: 10/22/2022]
Abstract
The current review covers recent advances on development and investigation of cationic surfactants containing imidazolium headgroup, which are being extensively investigated for their self-aggregation properties and are currently being utilized in various conventional and non-conventional application areas. These surfactants are being used as: soft template for synthesis of mesoporous/microporous materials, drug and gene delivery agent, stabilizing agent for nanoparticles, dispersants for single/multi walled carbon nanotubes, antimicrobial and antifungal agent, viscosity modifiers, preparing nanocomposite materials, stabilizing microemulsions, corrosion inhibitors and catalyst for organic reactions. Recently several structural derivatives of these surfactants have been developed having many interesting physicochemical properties and they have demonstrated enormous potential in the area of nanotechnology, material science and biomedical science.
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21
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Hyperbranched exopolysaccharide-enhanced foam properties of sodium fatty alcohol polyoxyethylene ether sulfate. Colloids Surf B Biointerfaces 2016; 141:206-212. [DOI: 10.1016/j.colsurfb.2016.01.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 01/22/2016] [Accepted: 01/26/2016] [Indexed: 11/21/2022]
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22
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Lépori CMO, Correa NM, Silber JJ, Falcone RD. How the cation 1-butyl-3-methylimidazolium impacts the interaction between the entrapped water and the reverse micelle interface created with an ionic liquid-like surfactant. SOFT MATTER 2016; 12:830-844. [PMID: 26542472 DOI: 10.1039/c5sm02421h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The behavior of the interfacial water entrapped in reverse micelles (RMs) formed by the ionic liquid-like surfactant 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate (bmim-AOT) dissolved in benzene (or chlorobenzene) was investigated using noninvasive techniques such as dynamic light scattering (DLS), static light scattering (SLS), FT-IR and (1)H NMR. The DLS and SLS results reveal the formation of discrete spherical and non-interacting water droplets stabilized by the bmim-AOT surfactant. Moreover, since the droplet size increases as the W0 (W0 = [water]/[surfactant]) value increases, water interacts with the RM interface. From FT-IR and (1)H NMR data, a weaker water-surfactant interaction in bmim-AOT RMs in comparison with the RMs created by sodium 1,4-bis-2-ethylhexylsulfosuccinate (Na-AOT) is detected. Consequently, there are less water molecules interacting with the interface in bmim-AOT RMs, and their hydrogen bond network is not completely disrupted as they are in Na-AOT RMs. The results show how the nature of the new cation impacts the interaction between the entrapped water and the RM interface, modifying the interfacial water structure in comparison with the results known for Na-AOT.
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Affiliation(s)
- Cristian M O Lépori
- Departamento de Química, Universidad Nacional de Río Cuarto, Agencia Postal # 3, C.P. X5804BYA Río Cuarto, Argentina.
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23
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Asadabadi S, Saien J. Effects of pH and salinity on adsorption of different imidazolium ionic liquids at the interface of oil–water. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2015.10.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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