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Ray D, Chamlagai D, Kumar S, Mukhopadhyay S, Chakrabarty S, Aswal VK, Mitra S. Molecular Insights into the Conformational and Binding Behaviors of Human Serum Albumin Induced by Surface-Active Ionic Liquids. J Phys Chem B 2024; 128:6622-6637. [PMID: 38937939 DOI: 10.1021/acs.jpcb.4c01915] [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: 06/29/2024]
Abstract
Extensive research has been carried out to investigate the stability and function of human serum albumin (HSA) when exposed to surface-active ionic liquids (SAILs) with different head groups (imidazolium, morpholinium, and pyridinium) and alkyl chain lengths (ranging from decyl to tetradecyl). Analysis of the protein fluorescence spectra indicates noticeable changes in the secondary structure of HSA with varying concentrations of all SAILs tested. Helicity calculations based on the Fourier transform infrared (FTIR) data show that HSA becomes more organized at the micellar concentration of SAILs, leading to an increased protein activity at this level. Small-angle neutron scattering (SANS) data confirm the formation of a bead-necklace structure between the SAILs and HSA. Atomistic molecular dynamics (MD) simulation results identify several hotspots on the protein surface for interaction with SAIL, which results in the modulation of protein conformational fluctuation and stability. Furthermore, fluorescence resonance energy transfer (FRET) experiments with the intramolecular charge transfer (ICT) probe trans-ethyl p-(dimethylamino) cinnamate (EDAC) demonstrate that higher alkyl chain lengths and SAIL concentrations result in a significantly increased energy transfer efficiency. The findings of this study provide a detailed molecular-level understanding of how the protein structure and function are affected by the presence of SAILs, with potential implications for a wide range of applications involving protein-SAIL composite systems.
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Affiliation(s)
- Dhiman Ray
- Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - Dipak Chamlagai
- Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India
| | - Sugam Kumar
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sutanu Mukhopadhyay
- Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata 700106, India
| | - Suman Chakrabarty
- Department of Chemical and Biological Sciences, S. N. Bose National Centre for Basic Sciences, Kolkata 700106, India
| | - Vinod K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Sivaprasad Mitra
- Department of Chemistry, North-Eastern Hill University, Shillong 793 022, India
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2
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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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Dasanayake GS, Hamadani CM, Singh G, Kumar Misra S, Vashisth P, Sharp JS, Adhikari L, Baker GA, Tanner EEL. Imidazolium-based zwitterionic liquid-modified PEG-PLGA nanoparticles as a potential intravenous drug delivery carrier. NANOSCALE 2024; 16:5584-5600. [PMID: 38410026 DOI: 10.1039/d3nr06349f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
Zwitterionic-based systems offer promise as next-generation drug delivery biomaterials capable of enhancing nanoparticle (NP) stimuli-responsiveness, biorecognition, and biocompatibility. Further, imidazole-functionalized amphiphilic zwitterions are able to readily bind to various biological macromolecules, enabling antifouling properties for enhanced drug delivery efficacy and bio-targeting. Herein, we describe structurally tuned zwitterionic imidazole-based ionic liquid (ZIL)-coated PEG-PLGA nanoparticles made with sonicated nanoprecipitation. Upon ZIL surface modification, the hydrodynamic radius increased by nearly 20 nm, and the surface charge significantly shifted closer to neutral. 1H NMR spectra suggests that the amount of ZIL on the nanoparticle surface is controlled by the structure of the ZIL and that the assembly occurs as a result of non-covalent interactions of ZIL-coated nanoparticle with the polymer surface. These nanoparticle-zwitterionic liquid (ZIL) constructs demonstrate selective affinity towards red blood cells in whole mouse blood and show relatively low human hemolysis at ∼5%. Additionally, we observe higher nanoparticle accumulation of ZIL-NPs compared with unmodified NP controls in human triple-negative breast cancer cells (MDA-MB-231). Furthermore, although the ZIL shows similar protein adsorption by SDS-PAGE, LC-MS/MS protein analysis data demonstrate a difference in the relative abundance and depletion of proteins in mouse and human serum. Hence, we show that ZIL-coated nanoparticles provide a new potential platform to enhance RBC-based drug delivery systems for cancer treatments.
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Affiliation(s)
- Gaya S Dasanayake
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677, USA.
| | - Christine M Hamadani
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677, USA.
| | - Gagandeep Singh
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677, USA.
| | - Sandeep Kumar Misra
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677, USA
| | - Priyavrat Vashisth
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677, USA.
| | - Joshua S Sharp
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677, USA.
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677, USA
| | - Laxmi Adhikari
- Department of Chemistry, University of Missouri, Columbia, MO, 65211, USA
| | - Gary A Baker
- Department of Chemistry, University of Missouri, Columbia, MO, 65211, USA
| | - Eden E L Tanner
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677, USA.
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Singh G, Dasanayake GS, Chism CM, Vashisth P, Kaur A, Misra SK, Sharp JS, Tanner EEL. Good's Buffer Based Highly Biocompatible Ionic Liquid Modified PLGA Nanoparticles for the Selective Uptake in Cancer Cells. MATERIALS CHEMISTRY FRONTIERS 2023; 7:6213-6228. [PMID: 38204762 PMCID: PMC10776129 DOI: 10.1039/d3qm00787a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Achieving safe and efficacious drug delivery is still an outstanding challenge. Herein we have synthesized 20 biocompatible Good's buffer-based ionic liquids (GBILs) with a range of attractive properties for drug delivery applications. The synthesized GBILs were used to coat the surface of poly(lactic-co-glycolic acid) (PLGA) by nanoprecipitation-sonication and characterized by dynamic light scattering (DLS) and proton nuclear magnetic resonance (1H NMR) spectroscopy. The GBIL-modified PLGA NPs were then tested for their interaction with bio-interfaces such as serum proteins (using SDS-PAGE and LCMS) and red blood cells (RBCs) isolated from human and BALB/c mouse blood. In this report, we show that surface modification of PLGA with certain GBILs led to modulation of preferential cellular uptake towards human triple-negative breast cancer cells (MDA-MB-231) compared to human normal healthy breast cells (MCF-10A). For example, cholinium N,N-bis(2-hydroxyethyl)-2-aminoethane sulfonate (CBES) coated PLGA NPs were found to be selective for MDA-MB-231 cells (60.7 ± 0.7 %) as compared to MCF-10A cells (27.3 ± 0.7 %). In this way, GBIL-coatings have increased PLGA NP uptake in the cancer cells by 2-fold while decreasing the uptake towards normal healthy breast cells. Therefore, GBIL-modified nanoparticles could be a versatile platform for targeted drug delivery and gene therapy applications, as their surface properties can be tailored to interact with specific cell receptors and enhance cellular uptake. This formulation technique has shown promising results for targeting specific cells, which could be explored further for other cell types to achieve site-specific and efficient delivery of therapeutic agents.
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Affiliation(s)
- Gagandeep Singh
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677
| | - Gaya S. Dasanayake
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677
| | - Claylee M. Chism
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677
| | - Priyavrat Vashisth
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677
| | - Amandeep Kaur
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677
| | - Sandeep Kumar Misra
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677
| | - Joshua S. Sharp
- Department of BioMolecular Sciences, University of Mississippi, University, MS 38677
| | - Eden E. L. Tanner
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677
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Katrahalli U, Shanker G, Pal D, Hadagali MD. Molecular spectroscopic and docking analysis of the interaction of fluorescent thiadicarbocyanine dye with biomolecule bovine serum albumin. J Biomol Struct Dyn 2023; 41:10702-10712. [PMID: 36546697 DOI: 10.1080/07391102.2022.2158135] [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: 07/18/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022]
Abstract
Binding studies of the water-soluble thiadicarbocyanine dye 3,3'-diethylthiadicarbocyanine acetate (DTC) with bovine serum albumin (BSA) were examined under physiological conditions using spectroscopic techniques like fluorescence, UV-Visible, circular dichroism (CD), FT-IR and molecular docking methods. Compiled experimental results envisage that DTC quench the fluorescence intensity of BSA. The increasing binding constants (K) were found to be in the order of 103 Mol-1 as a function of temperature, as calculated from the fluorescence quenching data. The quenching mechanism, thermodynamic parameters (ΔH0, ΔS0 and ΔG0) and the number of binding sites have been explored. CD values showed that the secondary structure of the BSA has been altered upon binding to DTC. Displacement experiments were carried out with different site probes to find out the binding site of DTC on BSA and it was found that binding interaction at site II of sub-domain IIIA. The interference of common metal ions on the interaction of DTC with BSA has also been studied. The experimental data exhibit that DTC interacts with BSA by hydrophobic forces. The experimental findings from BSA binding studies were validated by using in silico molecular docking technique. The results of the investigations were accurately supported by studies on molecular docking. The optimal shape of the molecular probe demonstrated the affinity as a free binding energy release of -7.37 Kcal/mol. The present research report endeavors to the approachable nature of water-soluble DTC dye and paves way for targeted biological interactions.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
| | - Govindaswamy Shanker
- Department of Chemistry, Jnana Bharathi Campus, Bangalore University, Bangalore, India
| | - Debnath Pal
- Department of Computational and Data Sciences, Indian Institute of Science, Bangalore, India
| | - Manjunatha Devagondanahalli Hadagali
- Department of Computational and Data Sciences, Indian Institute of Science, Bangalore, India
- Department of Studies in Chemistry, Davangere University, Davangere, India
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Darlington DS, Mahurin AN, Kapusta K, Suh E, Smith C, Jarrett E, Chism CM, Meador WE, Kelly ZC, Delcamp JH, Zhao Y, Hammer NI, Kariyawasam CS, Somarathne RP, Fitzkee NC, Tanner EEL. Selective Near-Infrared Blood Detection Driven by Ionic Liquid-Dye-Albumin Nanointeractions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:10806-10819. [PMID: 37501336 PMCID: PMC10506859 DOI: 10.1021/acs.langmuir.3c00727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Due to its abundance in blood, a great deal of research has been undertaken to develop efficient biosensors for serum albumin and provide insight into the interactions that take place between these biosensing molecules and the protein. Near-infrared (NIR, >700 nm) organic dyes have been shown to be effective biosensors of serum albumin, but their effectiveness is diminished in whole blood. Herein, it is shown that an NIR sulfonate indolizine-donor-based squaraine dye, SO3SQ, can be strengthened as a biosensor of albumin through the addition of biocompatible ionic liquids (ILs). Specifically, the IL choline glycolate (1:1), at a concentration of 160 mM, results in the enhanced fluorescence emission ("switch-on") of the dye in the presence of blood. The origin of the fluorescence enhancement was investigated via methods, including DLS, ITC, and molecular dynamics. Further, fluorescence measurements were conducted to see the impact the dye-IL system had on the fluorescence of the tryptophan residue of human serum albumin (HSA), as well as to determine its apparent association constants in relation to albumin. Circular dichroism (CD) spectroscopy was used to provide evidence that the dye-IL system does not alter the secondary structures of albumin or DNA. Our results suggest that the enhanced fluorescence of the dye in the presence of IL and blood is due to diversification of binding sites in albumin, controlled by the interaction of the IL-dye-albumin complex.
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Affiliation(s)
- Donovan S Darlington
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Allison N Mahurin
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Karina Kapusta
- Department of Chemistry and Physics, Tougaloo College, Tougaloo, Mississippi 39174, United States
| | - Ember Suh
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Cameron Smith
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Ethan Jarrett
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Claylee M Chism
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - William E Meador
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Zakeyia C Kelly
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Jared H Delcamp
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
- Air Force Research Laboratory, Materials and Manufacturing Directorate (RXNC), Wright-Patterson AFB, 2230 Tenth Street B655, Dayton, Ohio 45433, United States
- UES, Inc., 4401 Dayton Xenia Rd, Dayton, Ohio 45432, United States
| | - Yongfeng Zhao
- Department of Chemistry, Physics and Atmospheric Sciences, Jackson State University, Jackson, Mississippi 39217, United States
| | - Nathan I Hammer
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
| | - Chathuri S Kariyawasam
- Department of Chemistry, Mississippi State University, Starkville, Mississippi 39762, United States
| | - Radha P Somarathne
- Department of Chemistry, Mississippi State University, Starkville, Mississippi 39762, United States
| | - Nicholas C Fitzkee
- Department of Chemistry, Mississippi State University, Starkville, Mississippi 39762, United States
| | - Eden E L Tanner
- Department of Chemistry and Biochemistry, The University of Mississippi, University, Mississippi 38677, United States
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Kharmyssov C, Sekerbayev K, Nurekeyev Z, Gaipov A, Utegulov ZN. Mechano-Chemistry across Phase Transitions in Heated Albumin Protein Solutions. Polymers (Basel) 2023; 15:polym15092039. [PMID: 37177189 PMCID: PMC10180835 DOI: 10.3390/polym15092039] [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: 02/16/2023] [Revised: 04/02/2023] [Accepted: 04/14/2023] [Indexed: 05/15/2023] Open
Abstract
The presence of certain proteins in biofluids such as synovial fluid, blood plasma, and saliva gives these fluids non-Newtonian viscoelastic properties. The amount of these protein macromolecules in biofluids is an important biomarker for the diagnosis of various health conditions, including Alzheimer's disease, cardiovascular disorders, and joint quality. However, existing technologies for measuring the behavior of macromolecules in biofluids have limitations, such as long turnaround times, complex protocols, and insufficient sensitivity. To address these issues, we propose non-contact, optical Brillouin and Raman spectroscopy to assess the viscoelasticity and chemistry of non-Newtonian solutions, respectively, at different temperatures in several minutes. In this work, bovine and human serum albumin solution-based biopolymers were studied to obtain both their collective dynamics and molecular chemical evolution across heat-driven phase transitions at various protein concentrations. The observed phase transitions at elevated temperatures could be fully delayed in heated biopolymers by appropriately raising the level of protein concentration. The non-contact optical monitoring of viscoelastic and chemical property evolution could represent novel potential mechano-chemical biomarkers for disease diagnosis and subsequent treatment applications, including hyperthermia.
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Affiliation(s)
- Chingis Kharmyssov
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, 010000 Astana, Kazakhstan
- Science Department, Astana IT University, 010000 Astana, Kazakhstan
| | - Kairolla Sekerbayev
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Zhangatay Nurekeyev
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, 010000 Astana, Kazakhstan
- Institute for Experimental Physics, Hamburg University, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Abduzhappar Gaipov
- Department of Medicine, School of Medicine, Nazarbayev University, 010000 Astana, Kazakhstan
| | - Zhandos N Utegulov
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, 010000 Astana, Kazakhstan
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9
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Singh G, Kaur M, Singh M, Kaur H, Kang TS. Spontaneous Fibrillation of Bovine Serum Albumin at Physiological Temperatures Promoted by Hydrolysis-Prone Ionic Liquids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10319-10329. [PMID: 34407374 DOI: 10.1021/acs.langmuir.1c01350] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
This study highlights the role of time-dependent hydrolysis of ionic liquid anion, [BF4]-, of ionic liquid (IL), 1-ethyl-3-methylimidazolium tetrafluoroborate, [C2mim][BF4], which results in ever-changing pH conditions. Such pH changes along with the ionic interactions bring conformational changes in bovine serum albumin (BSA), leading to the formation of amyloid fibers at 37 °C without external control of pH or addition of electrolyte. The fibrillation of BSA occurs spontaneously with the addition of IL; however, the highest growth rate has been observed in aqueous solution of 10% IL (v/v %) among investigated systems. Thioflavin T (ThT) fluorescence emission has been employed to monitor the growth and development of β-sheet content in amyloid fibrils. The structural alterations in BSA have also been investigated using intrinsic fluorescence measurements. Circular dichroism (CD) measurements confirmed the formation of amyloid fibrils. Transmission electron microscopy (TEM) has been explored to establish the morphologies of BSA fibrils at different intervals of time, whereas atomic force microscopy (AFM) has established the helically twisted nature of grown amyloid fibrils. The docking studies have been utilized to understand the insertion of IL ions in different domains of BSA, which along with decreased pH cause the unfolding and growth of BSA into amyloid fibrils. It is expected that the results obtained from this study would help to understand the impact of IL containing [BF4]- anion on protein stability and aggregation along with providing a new platform to control the formation of amyloid fibrils and other biomaterials driven via ionic interactions and alterations in pH.
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Affiliation(s)
- Gagandeep Singh
- Department of Chemistry, UGC-Centre for Advance Studies-II, Guru Nanak Dev University, Amritsar 143005, India
| | - Manvir Kaur
- Department of Chemistry, UGC-Centre for Advance Studies-II, Guru Nanak Dev University, Amritsar 143005, India
| | - Manpreet Singh
- Department of Chemistry, UGC-Centre for Advance Studies-II, Guru Nanak Dev University, Amritsar 143005, India
| | - Harmandeep Kaur
- Department of Chemistry, UGC-Centre for Advance Studies-II, Guru Nanak Dev University, Amritsar 143005, India
| | - Tejwant Singh Kang
- Department of Chemistry, UGC-Centre for Advance Studies-II, Guru Nanak Dev University, Amritsar 143005, India
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El Seoud OA, Keppeler N, Malek NI, Galgano PD. Ionic Liquid-Based Surfactants: Recent Advances in Their Syntheses, Solution Properties, and Applications. Polymers (Basel) 2021; 13:1100. [PMID: 33808369 PMCID: PMC8036849 DOI: 10.3390/polym13071100] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 11/16/2022] Open
Abstract
The impetus for the expanding interest in ionic liquids (ILs) is their favorable properties and important applications. Ionic liquid-based surfactants (ILBSs) carry long-chain hydrophobic tails. Two or more molecules of ILBSs can be joined by covalent bonds leading, e.g., to gemini compounds (GILBSs). This review article focuses on aspects of the chemistry and applications of ILBSs and GILBSs, especially in the last ten years. Data on their adsorption at the interface and micelle formation are relevant for the applications of these surfactants. Therefore, we collected data for 152 ILBSs and 11 biamphiphilic compounds. The head ions of ILBSs are usually heterocyclic (imidazolium, pyridinium, pyrrolidinium, etc.). Most of these head-ions are also present in the reported 53 GILBSs. Where possible, we correlate the adsorption/micellar properties of the surfactants with their molecular structures, in particular, the number of carbon atoms present in the hydrocarbon "tail". The use of ILBSs as templates for the fabrication of mesoporous nanoparticles enables better control of particle porosity and size, hence increasing their usefulness. ILs and ILBSs form thermodynamically stable water/oil and oil/water microemulsions. These were employed as templates for (radical) polymerization reactions, where the monomer is the "oil" component. The formed polymer nanoparticles can be further stabilized against aggregation by using a functionalized ILBS that is co-polymerized with the monomers. In addition to updating the literature on the subject, we hope that this review highlights the versatility and hence the potential applications of these classes of surfactants in several fields, including synthesis, catalysis, polymers, decontamination, and drug delivery.
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Affiliation(s)
- Omar A. El Seoud
- Institute of Chemistry, The University of São Paulo, São Paulo 05508-000, Brazil; (N.K.); (P.D.G.)
| | - Nicolas Keppeler
- Institute of Chemistry, The University of São Paulo, São Paulo 05508-000, Brazil; (N.K.); (P.D.G.)
| | - Naved I. Malek
- Applied Chemistry Department, Sardar Vallabhbhai National Institute of Technology, Surat 395 007, Gujarat, India;
| | - Paula D. Galgano
- Institute of Chemistry, The University of São Paulo, São Paulo 05508-000, Brazil; (N.K.); (P.D.G.)
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11
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Reddy RR, Reddy JG, Kumar BVNP. NMR investigations on binding and dynamics of imidazolium-based ionic liquids with HEWL. Phys Chem Chem Phys 2020; 22:23824-23836. [PMID: 33073278 DOI: 10.1039/d0cp04584e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Molecular level insights on protein-ionic liquid (P-IL) interactions are beneficial for assessing protein stability, binding and dynamics. In the present work, interactions of ILs, namely, 1-butyl 3-methylimidazolium methyl sulfate (IL1), 1-butyl 3-methylimidazolium octyl sulfate (IL2) and 1-butyl 3-methylimidazolium chloride (IL3) with hen egg white lysozyme (HEWL) protein were investigated using solution-state nuclear magnetic resonance (NMR) spectroscopy. To ascertain the binding and dynamics from the perspective of both protein and IL, various ligand based NMR approaches such as selective and non-selective nuclear spin-relaxation (R1SEL and R1NS), saturation transfer difference (STD), difference of inversion recovery rate with and without target irradiation (DIRECTION), 35Cl line-shape and spin-relaxation, and protein back bone amide chemical shift perturbations (CSPs) from 1H-15N HSQC were utilized. Among the ILs investigated, IL2 experiences significant interaction relative to those of IL1 and IL3, as revealed by the combined R1SEL and R1NS analysis, which is further supported by STD NMR. CSP analyses of 1H-15N HSQC spectra of aqueous P-IL mixtures enabled to identify the potential binding sites of ILs with HEWL. Whereas, 15N longitudinal (R1) and transverse (R2) spin-relaxation rates and 15N{1H} heteronuclear nuclear Overhauser effect (hetNOE) data subjected to the model free analysis for IL2 yielded the rotational correlation times and order parameters of various residues of HEWL. Furthermore, the results could discern the nature of interactions between studied ILs and HEWL in terms of specific and non-specific interactions.
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Affiliation(s)
- R Ravikanth Reddy
- NMR, Centre for Analysis, Testing, Evaluation & Reporting Services (CATERS), CSIR-Central Leather Research Institute, Chennai - 600020, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India
| | - Jithender G Reddy
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India and NMR Division, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad - 500007, India.
| | - B V N Phani Kumar
- NMR, Centre for Analysis, Testing, Evaluation & Reporting Services (CATERS), CSIR-Central Leather Research Institute, Chennai - 600020, India. and Academy of Scientific and Innovative Research (AcSIR), Ghaziabad - 201002, India
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