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Said AR, Asaad GF, Shabana ME, Sayed AS, Elfeky DH, Mohamed Ali H, Adel Abdelfattah A, M El-Husseiny H, El-Dakroury WA. Desosomes and desimicelles - a novel vesicular and micellar system for enhanced oral delivery of poorly soluble drug: Optimization of in vitro characteristics and in vivo performance. Eur J Pharm Biopharm 2024; 200:114324. [PMID: 38759898 DOI: 10.1016/j.ejpb.2024.114324] [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: 02/17/2024] [Revised: 05/04/2024] [Accepted: 05/14/2024] [Indexed: 05/19/2024]
Abstract
This study introduces two innovative nanocarrier systems to improve oral drug delivery. Desosomes and desimicelles combine Deep eutectic solvent (DES) with vesicular or micellar nanosystems, respectively. These novel nanosystems integrate the DES solubilization potency for administering drugs with low aqueous solubility and the vesicular and micellar systems to bypass physiological barriers and improve poor drug bioavailability. Lornoxicam (LRX) is a BCS class II anti-inflammatory with limited aqueous solubility and rapid clearance. Desosomes and desimicelles were prepared and successfully optimized. The optimization depended on particle size, zetapotential, entrapment efficiency, and solubility. The optimized desosomes (LRX-DES-V) and desimicelles (LRX-DES-M) were pictured by transmission electron microscope. Differential scanning calorimetry (DSC) and FTIR analysis indicated the successful inclusion of LRX inside each system. Invitro LRX release profiles revealed controlled release of LRX-DES-V and LRX-DES-M, with more sustained release by the later one. In-vivo study, inflammation was induced using a carrageenan rat model, and the anti-inflammatory effect of LRX-pure, marketed product, traditional niosomes, LRX-DES-V & LRX-DES-M were determined using inhibition %, serum inflammatory cytokines, and histopathology. After 4 h of induction, LRX-DES-M (68.05%) showed a significant inhibition compared to LRX-DES-V (63.57%). LRX-DES-M also showed a better reduction in COX2, PGE2, and TNF-α (1.25-fold, 1.24-fold, and 1.36-fold inhibition), respectively, compared to LRX-DES-V. We can conclude that LRX-DES-V and LRX-DES-M showed better effects than all other groups and that LRX-DES-M might be more effective than LRX-DES-V.
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Affiliation(s)
- Abdelrahman R Said
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Gihan F Asaad
- Department of Pharmacology, Medical Research and Clinical Studies Institute, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Marwa E Shabana
- Pathology Department, National Research Centre, Dokki, Giza, Egypt
| | - Alaa S Sayed
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Dalia H Elfeky
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | - Hager Mohamed Ali
- Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt
| | | | - Hussein M El-Husseiny
- Laboratory of Veterinary Surgery, Department of Veterinary Medicine, Faculty of Agriculture, 5 Tokyo University of Agriculture and Technology, 3-5-8 Saiwai Cho, Fuchu-shi, Tokyo 183-8509, 6 Japan; Department of Surgery, Anesthesiology, and Radiology, Faculty of Veterinary Medicine, Benha 8 University, Moshtohor, Toukh, Elqaliobiya,13736, Egypt
| | - Walaa A El-Dakroury
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Badr University in Cairo (BUC), Badr City, Cairo 11829, Egypt.
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Kahlon NK, Matthewman EL, El Mohamad M, Greaves TL, Weber CC. Small-Angle X-ray Scattering Study of the Amphiphilic Bulk Nanostructure of Tetraalkylammonium Deep Eutectic Solvents. J Phys Chem B 2024. [PMID: 38662201 DOI: 10.1021/acs.jpcb.4c00943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Deep eutectic solvents (DESs) are low-melting mixtures, often prepared from a salt and a molecular hydrogen bond donor. Like ionic liquids, DESs that contain at least one sufficiently amphiphilic component can form bicontinuous nanostructures consisting of polar and nonpolar domains, although this has not been widely explored for many DES combinations. Here, the bulk nanostructures of DESs comprising tetraalkylammonium bromide salts (tetrabutylammonium bromide, tetraoctylammonium bromide, and methyltrioctylammonium bromide) with alkanols and alkanoic acids of systematically varied chain lengths (C2, C6, C8, and C10) as hydrogen bond donors have been studied. Small-angle X-ray scattering techniques were used to identify the relationship between the alkyl chain length and functionality of the hydrogen bond donor on the nature of the amphiphilic nanostructures formed. These findings demonstrated that the amphiphilic nanostructures of the DESs were not affected by the functional group on the hydrogen bond donor, with these nanostructures influenced primarily by both the absolute and relative alkyl chain lengths of the salt and hydrogen bond donor.
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Affiliation(s)
- Navjot K Kahlon
- School of Chemical Sciences, The University of Auckland, Auckland 1010, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
| | - Emma L Matthewman
- School of Chemical Sciences, The University of Auckland, Auckland 1010, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
| | | | | | - Cameron C Weber
- School of Chemical Sciences, The University of Auckland, Auckland 1010, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
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Zhang Y, Marlow JB, Wood K, Wang J, Warr GG, Li H, Atkin R. Phase behaviour and aggregate structures of the surface-active ionic liquid [BMIm][AOT] in water. J Colloid Interface Sci 2023; 652:749-757. [PMID: 37582670 DOI: 10.1016/j.jcis.2023.08.049] [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: 03/13/2023] [Revised: 08/02/2023] [Accepted: 08/08/2023] [Indexed: 08/17/2023]
Abstract
HYPOTHESIS The surface-active ionic liquid, 1-butyl-3-methylimidazolium 1,4-bis-2-ethylhexylsulfosuccinate ([BMIm][AOT]), has a sponge-like bulk nanostructure consisting of percolating polar and apolar domains formed by the ion charge groups and alkyl chains, respectively. We hypothesise that added water will swell the polar domains and change the liquid nanostructure. EXPERIMENTS Small angle X-ray scattering (SAXS), small angle neutron scattering (SANS) and polarizing optical microscopy (POM) were used to investigate the nanostructure of [BMIm][AOT] as a function of water content. Differential scanning calorimetry (DSC) was employed to probe the thermal transitions of [BMIm][AOT]-water mixtures and the mobility of water molecules. FINDINGS SAXS, SANS and POM show that at lower water contents, [BMIm][AOT]-water mixtures have a sponge-like nanostructure similar to the pure SAIL, at medium water contents a lamellar phase forms, and at high water contents vesicles form. DSC results reveal that water molecules are supercooled in the lamellar phase. For the first time, results reveal a series of transitions from inverse sponge, to lamellar then to vesicles, for [BMIm][AOT] upon dilution with water.
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Affiliation(s)
- Yunxiao Zhang
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Joshua B Marlow
- School of Chemistry and Sydney Nano Institute, The University of Sydney, NSW 2006, Australia
| | - Kathleen Wood
- Australian Nuclear Science and Technology Organisation, Lucas Heights, New South Wales 2234, Australia
| | - Jianan Wang
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Gregory G Warr
- School of Chemistry and Sydney Nano Institute, The University of Sydney, NSW 2006, Australia
| | - Hua Li
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia; Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia.
| | - Rob Atkin
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia.
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Baruah I, Borgohain G. Temperature dependent molecular dynamics simulation study to understand the stabilizing effect of NADES on the protein β-Lactoglobulin. J Mol Graph Model 2023; 125:108582. [PMID: 37595383 DOI: 10.1016/j.jmgm.2023.108582] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 07/24/2023] [Accepted: 07/28/2023] [Indexed: 08/20/2023]
Abstract
The thermal stability of a protein is an important concern for its practical application in food processing industries. In this study, we have carried out classical molecular dynamics simulations to systematically investigate the effect of NADES (natural deep eutectic solvent) on the stabilization of the protein β-Lactoglobulin (BLG) at different temperatures. This study sheds light on the very aspects of NADES composed of betaine and sorbitol on the stability of the protein. NADES provides better stability to the protein up to a temperature of 400 K than in water. It is observed that the protein starts to unfold above temperature 400 K in spite of the presence of NADES which is quiet evident from the root mean square deviation (RMSD) and radius of gyration (Rg) plots. The decreasing average solvent accessible surface area (SASA) values and increasing intra-protein hydrogen bonds indicate better stability of the protein in NADES medium than in water at temperatures 300 K and 400 K. At high temperatures viz. 450 K and 500 K the number and distribution of solvent species (betaine and sorbitol) around the protein surface show an increment that are evident from the calculations of solvation shell, radial and spatial distribution functions. Increased number of betaine molecules that interact with the protein through electrostatic interaction may lead to destabilization of the protein at these temperatures. This study suggests that NADES could be used as an ideal medium for thermal stability of the protein BLG up to a temperature of 400 K. Beyond this temperature, NADES used for this study fails to exert stabilization effect on the protein.
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Affiliation(s)
- Indrani Baruah
- Department of Chemistry, Cotton University, Guwahati, Assam, 781001, India
| | - Gargi Borgohain
- Department of Chemistry, Cotton University, Guwahati, Assam, 781001, India.
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Khokhar V, Pandey S. Constituent- and Composition-Dependent Surfactant Aggregation in (Lanthanide Salt + Urea) Deep Eutectic Solvents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:5129-5136. [PMID: 37001023 DOI: 10.1021/acs.langmuir.3c00189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Due to the ease of tailoring the physicochemical properties by simply changing a constituent or composition, deep eutectic solvents (DESs) possess widely varying capabilities for surfactant self-assembly that could depend on the surfactant headgroup charge. The self-aggregation process of three surfactants, sodium dodecylsulfate (SDS), cetyltrimethylammonium bromide (CTAB), and Triton X-100 (TX-100), dissolved in DESs composed of a lanthanide salt (Ln) and urea (U) is investigated. The role of the identity of the metal salt is assessed by using [La(NO3)3·6H2O] (La) and [Ce(NO3)3·6H2O] (Ce) and that of the composition is deciphered by systematically changing the mole ratio of the metal salt and urea in (La/U) DESs. The response to a fluorescence probe pyrene-1-carboxaldehyde along with electrical conductance and surface tension measurements is used to obtain the critical aggregation concentration (CAC). While the CACs in 1:3.5 (Ln/U) for SDS are significantly lower than that in water, the values are marginally higher for CTAB and TX-100. The CACs for all three surfactants are similar in 1:3.5 (La/U) and (Ce/U) DESs, implying that the identity of the metal in the salt is not so important. Increasing the urea composition in (La/U) DESs results in increased CAC for SDS and CTAB; however, a minimal decrease in CAC is observed for TX-100. From the temperature dependence of CAC, thermodynamic parameters, ΔGagg0, ΔHagg0, and ΔSagg0, of the surfactant self-aggregation process are estimated. These parameters reveal that while at a lower urea content, the SDS/CTAB self-assembly process is enthalpically driven, it becomes entropically favored at higher urea concentrations. The TX-100 self-aggregation in these DESs is found to be strongly enthalpically favored and entropically un-favored. These parameters are explained as a combination of passage of the solvophobic surfactant chain from the bulk DES to the aggregate pseudo-phase and differential orientation/organization of DES constituents around surfactant monomers and/or aggregates.
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Affiliation(s)
- Vaishali Khokhar
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Siddharth Pandey
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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Basu M, Hassan PA, Shelar SB. Modulation of surfactant self-assembly in deep eutectic solvents and its relevance to drug delivery-A review. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Current Advances in Lipid Nanosystems Intended for Topical and Transdermal Drug Delivery Applications. Pharmaceutics 2023; 15:pharmaceutics15020656. [PMID: 36839978 PMCID: PMC9967415 DOI: 10.3390/pharmaceutics15020656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/29/2023] [Accepted: 01/31/2023] [Indexed: 02/18/2023] Open
Abstract
Skin delivery is an exciting and challenging field. It is a promising approach for effective drug delivery due to its ease of administration, ease of handling, high flexibility, controlled release, prolonged therapeutic effect, adaptability, and many other advantages. The main associated challenge, however, is low skin permeability. The skin is a healthy barrier that serves as the body's primary defence mechanism against foreign particles. New advances in skin delivery (both topical and transdermal) depend on overcoming the challenges associated with drug molecule permeation and skin irritation. These limitations can be overcome by employing new approaches such as lipid nanosystems. Due to their advantages (such as easy scaling, low cost, and remarkable stability) these systems have attracted interest from the scientific community. However, for a successful formulation, several factors including particle size, surface charge, components, etc. have to be understood and controlled. This review provided a brief overview of the structure of the skin as well as the different pathways of nanoparticle penetration. In addition, the main factors influencing the penetration of nanoparticles have been highlighted. Applications of lipid nanosystems for dermal and transdermal delivery, as well as regulatory aspects, were critically discussed.
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Bryant SJ, Awad MN, Elbourne A, Christofferson AJ, Martin AV, Meftahi N, Drummond CJ, Greaves TL, Bryant G. Deep eutectic solvents as cryoprotective agents for mammalian cells. J Mater Chem B 2022; 10:4546-4560. [PMID: 35670530 DOI: 10.1039/d2tb00573e] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cryopreservation has facilitated numerous breakthroughs including assisted reproductive technology, stem cell therapies, and species preservation. Successful cryopreservation requires the addition of cryoprotective agents to protect against freezing damage and dehydration. For decades, cryopreservation has largely relied on the same two primary agents: dimethylsulfoxide and glycerol. However, both of these are toxic which limits their use for cells destined for clinical applications. Furthermore, these two agents are ineffective for hundreds of cell types, and organ and tissue preservation has not been achieved. The research presented here shows that deep eutectic solvents can be used as cryoprotectants. Six deep eutectic solvents were explored for their cryoprotective capacity towards mammalian cells. The solvents were tested for their thermal properties, including glass transitions, toxicity, and permeability into mammalian cells. A deep eutectic solvent made from proline and glycerol was an effective cryoprotective agent for all four cell types tested, even with extended incubation prior to freezing. This deep eutectic solvent was more effective and less toxic than its individual components, highlighting the importance of multi-component systems. Cells were characterised post-thawing using atomic force microscopy and confocal microscopy. Molecular dynamics simulations support the biophysical parameters obtained by experimentation. This is one of the first times that this class of solvents has been systematically tested for cryopreservation of mammalian cells and as such this research opens the way for the development of potentially thousands of new cryoprotective agents that can be tailored to specific cell types. The demonstrated capacity of cells to be incubated with the deep eutectic solvent at 37 °C for hours prior to freezing without significant loss of viability is a major step toward the storage of organs and tissues.
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Affiliation(s)
- Saffron J Bryant
- School of Science, College of STEM, RMIT University, Melbourne, Australia
| | - Miyah N Awad
- School of Science, College of STEM, RMIT University, Melbourne, Australia
| | - Aaron Elbourne
- School of Science, College of STEM, RMIT University, Melbourne, Australia
| | - Andrew J Christofferson
- School of Science, College of STEM, RMIT University, Melbourne, Australia.,ARC Centre of Excellence in Exciton Science, School of Science, College of STEM, RMIT University, Melbourne, Australia.
| | - Andrew V Martin
- School of Science, College of STEM, RMIT University, Melbourne, Australia
| | - Nastaran Meftahi
- ARC Centre of Excellence in Exciton Science, School of Science, College of STEM, RMIT University, Melbourne, Australia.
| | - Calum J Drummond
- School of Science, College of STEM, RMIT University, Melbourne, Australia
| | - Tamar L Greaves
- School of Science, College of STEM, RMIT University, Melbourne, Australia
| | - Gary Bryant
- School of Science, College of STEM, RMIT University, Melbourne, Australia
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Wu J, Yin T. Amphiphilic Deep Eutectic Solvent Based on Lidocaine and Lauric Acid: Formation of Microemulsion and Gel. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1170-1177. [PMID: 35029402 DOI: 10.1021/acs.langmuir.1c02837] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Deep eutectic solvent (DES), as a new type of promising green solvent, showed great advantages of easy preparation and no need for purification after synthesis and displayed great potential applications in various fields. Herein, we have constructed a new type of therapeutic DES based on lidocaine and lauric acid. The DES displayed good surface activity in constructing a nonaqueous microemulsion with 1,2-propanediol (PG) and isopropyl myristate (IPM) being the polar phase and nonpolar phase, respectively. The obtained nonaqueous microemulsion displayed a structural transition from W/O type to O/W type via a bicontinuous structure with an increase of the PG content. The size, morphology, and microstructure of the microemulsion were explored using dynamic light scattering (DLS), transmission electron microscopy (TEM), and UV-vis absorption spectra measurements. Furthermore, this novel DES can act as a gelator to form a gel in a certain water content range. The rheological measurements suggested the presence of a strong colloidal force. Therefore, the results presented herein were expected to provide a new perspective in the applications of deep eutectic solvent as a surfactant.
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Affiliation(s)
- Jieyu Wu
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Tianxiang Yin
- School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China
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Sakuragi M. Evaluation of the supramolecular structure of drug delivery carriers using synchrotron X-ray scattering. Polym J 2021. [DOI: 10.1038/s41428-021-00533-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Optimization of ultrasound-assisted dispersive liquid–liquid microextraction of niacinamide in pharmaceutical and cosmetic samples using experimental design. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106659] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Bulk and interfacial nanostructure and properties in deep eutectic solvents: Current perspectives and future directions. J Colloid Interface Sci 2021; 608:2430-2454. [PMID: 34785053 DOI: 10.1016/j.jcis.2021.10.163] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/25/2021] [Accepted: 10/26/2021] [Indexed: 12/25/2022]
Abstract
Deep eutectic solvents (DESs) are a tailorable class of solvents that are rapidly gaining scientific and industrial interest. This is because they are distinct from conventional molecular solvents, inherently tuneable via careful selection of constituents, and possess many attractive properties for applications, including catalysis, chemical extraction, reaction media, novel lubricants, materials chemistry, and electrochemistry. DESs are a class of solvents composed solely of hydrogen bond donors and acceptors with a melting point lower than the individual components and are often fluidic at room temperature. A unique feature of DESs is that they possess distinct bulk liquid and interfacial nanostructure, which results from intra- and inter-molecular interactions, including coulomb forces, hydrogen bonding, van der Waals interactions, electrostatics, dispersion forces, and apolar-polar segregation. This nanostructure manifests as preferential spatial arrangements of the different species, and exists over several length scales, from molecular- to nano- and meso-scales. The physicochemical properties of DESs are dictated by structure-property relationships; however, there is a significant gap in our understanding of the underlying factors which govern their solvent properties. This is a major limitation of DES-based technologies, as nanostructure can significantly influence physical properties and thus potential applications. This perspective provides an overview of the current state of knowledge of DES nanostructure, both in the bulk liquid and at solid interfaces. We provide definitions which clearly distinguish DESs as a unique solvent class, rather than a subset of ILs. An appraisal of recent work provides hints towards trends in structure-property relationships, while also highlighting inconsistencies within the literature suggesting new research directions for the field. It is hoped that this review will provide insight into DES nanostructure, their potential applications, and development of a robust framework for systematic investigation moving forward.
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Deep eutectic systems: An overview of fundamental aspects, current understanding and drug delivery applications. Int J Pharm 2021; 610:121203. [PMID: 34673164 DOI: 10.1016/j.ijpharm.2021.121203] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/24/2021] [Accepted: 10/07/2021] [Indexed: 01/03/2023]
Abstract
The deep eutectic system (DES) is a relatively new concept in the field of drug delivery science. DES is a class of eutectic mixtures comprised of two or more components, with a eutectic point far below than the melting temperature of the pure components. The strong hydrogen bonding interactions between DES constituents are responsible for significant lowering of melting point in DES. A significant number of molecules cannot reach from drug discovery phase to drug development phase because of poor biopharmaceutical attributes, such as solubility and permeability. DES can be a novel alternative to overcome these issues. In last few years DESs have been widely used in different pharmaceutical and chemical processes. However, comprehensive information regarding their drug delivery potential is not available. This review deals with fundamental aspects such as types, preparation, thermodynamics, toxicity, biodegradability and their applications in the field of drug delivery. Current challenges, future prospects and translational aspects of DES as drug delivery system have also been discussed.
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Hammons JA, Besford QA, Ilavsky J, Christofferson AJ. Manipulating meso-scale solvent structure from Pd nanoparticle deposits in deep eutectic solvents. J Chem Phys 2021; 155:074505. [PMID: 34418930 DOI: 10.1063/5.0058605] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Deep Eutectic Solvents (DESs) are complex solutions that present unique challenges compared to traditional solvents. Unlike most aqueous electrolytes and ionic liquids, DESs have delicate hydrogen bond networks that are responsible for their highly sensitive compositional dependence on the melting point. Prior work has demonstrated a unique nanoscale structure both experimentally and theoretically that brings both challenges and opportunities to their adoption in traditional electrochemical processes. In this study, we use in situ sample-rotated ultra-small angle x-ray scattering to resolve the near-interface solvent structure after electrodepositing Pd nanoparticles onto a glassy carbon electrode in choline chloride:urea and choline chloride:ethylene glycol DESs. Our results indicate that a hierarchical solvent structure can be observed on the meso-scale in the choline chloride:urea and choline chloride:ethylene glycol systems. Importantly, this extended solvent structure increases between -0.3 V and -0.5 V (vs Ag/AgCl) and remains high until -0.9 V (vs Ag/AgCl). Experimentally, the nature of this structure is more pronounced in the ethylene glycol system, as evidenced by both the x-ray scattering and the electrochemical impedance spectroscopy. Molecular dynamics simulations and dipolar orientation analysis reveal that chloride delocalization near the Pd interface and long-range interactions between the choline and each hydrogen bond donor (HBD) are very different and qualitatively consistent with the experimental data. These results show how the long-range solvent-deposit interactions can be tuned by changing the HBD in the DES and the applied potential.
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Affiliation(s)
- Joshua A Hammons
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - Quinn A Besford
- Leibniz-Institut für Polymerforschung e. V., Hohe Straße 6, 01069 Dresden, Germany
| | - Jan Ilavsky
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA
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Bryant SJ, Bathke EK, Edler KJ. Bottom-up cubosome synthesis without organic solvents. J Colloid Interface Sci 2021; 601:98-105. [PMID: 34058556 DOI: 10.1016/j.jcis.2021.05.072] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 05/10/2021] [Accepted: 05/14/2021] [Indexed: 01/20/2023]
Abstract
HYPOTHESIS Bottom-up synthesis of cubosomes is more energetically favourable than top-down approaches. However, bottom-up methods often rely on organic solvents such as ethanol as diluents, and lead to concurrent formation of liposomes. We propose using non-toxic diluents such as honey, glycerol and lactic acid for bottom-up cubosome synthesis. EXPERIMENTS Cubosomes were prepared using solutions of phytantriol in a range of diluents including choline chloride-glycerol, honey, lactic acid, glycerol, and ethanol. These solutions were added dropwise to water containing the stabiliser, poloxamer 407, following an established method of cubosome synthesis. The resulting structures were characterised using small-angle X-ray scattering, DLS and cryo-TEM. FINDINGS Cubosomes were successfully formed using a range of non-toxic diluents. This demonstrates that harmful organic solvents like ethanol are not required, and that the diluents need not be hydrotropes. Furthermore, unlike ethanol, these other diluents allowed formation of cubosomes without concurrent formation of liposomes. Given the huge potential for cubosomes in drug delivery, this new method offers a potentially useful low-cost, low-toxicity synthesis option.
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Affiliation(s)
- Saffron J Bryant
- School of Science, RMIT University, Melbourne, Victoria 3001, Australia; Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.
| | - Elly K Bathke
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom
| | - Karen J Edler
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.
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Matthews L, Ruscigno S, Rogers SE, Bartlett P, Johnson AJ, Sochon R, Briscoe WH. Fracto-eutectogels: SDS fractal dendrites via counterion condensation in a deep eutectic solvent. Phys Chem Chem Phys 2021; 23:11672-11683. [PMID: 33978002 DOI: 10.1039/d1cp01370j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Glyceline, a deep eutectic solvent comprising glycerol and choline chloride, is a green nonaqueous solvent with potential industrial applications. Molecular mechanisms of surfactant self-assembly in deep eutectic solvents are expected to differ from those in their constituent polar components and are not well understood. Here we report the observation of self-assembled SDS fractal dendrites with dimensions up to ∼mm in glyceline at SDS concentrations as low as cSDS ∼ 0.1 wt%. The prevalence of these dendritic fractal aggregates led to the formation of a gel phase at SDS concentrations above ≥1.9 wt% (the critical gelation concentration cCGC). The gel microscopic structure was visualised using polarised light microscopy (PLM); rheology measurements confirmed the formation of a colloidal gel, where the first normal stress difference was negative and the elastic modulus was dominant. Detailed nano-structural characterisation by small-angle neutron scattering (SANS) further confirmed the presence of fractal aggregates. Such SDS aggregation or gelation has not been observed in water at such low surfactant concentrations, whereas SDS has been reported to form lamellar aggregates in glycerol (a component of glyceline). We attribute the formation of the SDS fractal dendrites to the condensation of counterions (i.e. the choline ions) around the SDS aggregates - a diffusion-controlled process, leading to the aggregate morphology observed. These unprecedented results shed light on the molecular mechanisms of surfactant self-assembly in deep eutectic solvents, important to their application in industrial formulation.
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Affiliation(s)
- Lauren Matthews
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK. and Bristol Centre for Functional Nanomaterials, HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK
| | - Silvia Ruscigno
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Sarah E Rogers
- ISIS Muon and Neutron Source, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK
| | - Paul Bartlett
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | | | - Robert Sochon
- GlaxoSmithKline, St George's Avenue, Weybridge, KT13 0DE, UK
| | - Wuge H Briscoe
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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17
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Gutiérrez-Hernández A, Richaud A, Chacón-García L, Cortés-García CJ, Méndez F, Contreras-Celedón CA. Deep Eutectic Solvent Choline Chloride/ p-toluenesulfonic Acid and Water Favor the Enthalpy-Driven Binding of Arylamines to Maleimide in Aza-Michael Addition. J Org Chem 2021; 86:223-234. [PMID: 33232142 DOI: 10.1021/acs.joc.0c02039] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Deep eutectic solvents (DESs) have been considered "the organic reaction medium of the century" because they can be used as solvents and active catalysts in chemical reactions. However, experimental and theoretical studies are still needed to provide information on the structures of DESs, the kinetics and thermodynamics properties, the interactions between the DESs and the substrates, the effect of water on the DES supramolecular network and its physicochemical properties, and so forth. This information is very useful to understand the essence of the processes that take place in the catalysis of chemical reactions and, therefore, to help in the design of a DES for a specific reaction and sample. This article shows a systematic study of the impact of DES choline chloride/p-toluenesulfonic acid and DES choline chloride/p-toluenesulfonic acid-water in the aza-Michael addition of arylamines to maleimide to obtain aminopyrrolidine-2,5-dione derivatives. The derivatives are obtained under very mild reaction conditions with good yield. The global reaction is exothermic, spontaneous, permitted by enthalpy, and prohibited for entropy. The calculated potential energy surface shows a reaction mechanism of six steps controlled by enthalpy (except the last step that is controlled by entropy). The water incorporated in the supramolecular DES complex stabilizes the transition states and favors the enthalpy-driven binding. A set of H/D exchange NMR experiments validates the transition state existing in the fourth stage of the mechanism.
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Affiliation(s)
- Abelardo Gutiérrez-Hernández
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
| | - Arlette Richaud
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, Mexico.,Loire Valley Institute for Advanced Studies, Orléans & Tours, France CEMHTI, 1 Avenue de la Recherche Scientifique, Orléans 45000, France
| | - Luis Chacón-García
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
| | - Carlos J Cortés-García
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
| | - Francisco Méndez
- Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, Mexico.,Loire Valley Institute for Advanced Studies, Orléans & Tours, France CEMHTI, 1 Avenue de la Recherche Scientifique, Orléans 45000, France
| | - Claudia Araceli Contreras-Celedón
- Departamento de Síntesis Orgánica, Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edif. B-1, Ciudad Universitaria, Francisco J. Mújica, s/n, Morelia 58030, Michoacán, Mexico
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18
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Atri RS, Sanchez-Fernandez A, Hammond OS, Manasi I, Doutch J, Tellam JP, Edler KJ. Morphology Modulation of Ionic Surfactant Micelles in Ternary Deep Eutectic Solvents. J Phys Chem B 2020; 124:6004-6014. [PMID: 32551622 PMCID: PMC7467713 DOI: 10.1021/acs.jpcb.0c03876] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Deep eutectic solvents
(DES) are potentially greener solvents obtained
through the complexation of simple precursors which, among other applications,
have been investigated in recent years for their ability to support
the self-assembly of amphiphilic molecules. It is crucial to understand
the factors which influence surfactant solubility and self-assembly
with respect to the interaction of the surfactant molecule with the
DES components. In this work, small-angle neutron scattering (SANS)
has been used to investigate the micellization of cationic (CnTAB) and anionic (SDS) surfactants in a ternary
DES comprising choline chloride, urea, and glycerol, where the hydrogen
bond donors are mixed in varying molar ratios. The results show that
in each case either globular or rodlike micelles are formed with the
degree of elongation being directly dependent on the composition of
the DES. It is hypothesized that this composition dependence arises
largely from the poor solubility of the counterions in the DES, especially
at low glycerol content, leading to a tighter binding of the counterion
to the micelle surface and giving rise to micelles with a high aspect
ratio. This potential for accurate control over micelle morphology
presents unique opportunities for rheology control or to develop templated
syntheses of porous materials in DES, utilizing the solvent composition
to tailor micelle shape and size, and hence the pore structure of
the resulting material.
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Affiliation(s)
- Ria S Atri
- EPSRC Centre for Doctoral Training in Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.,Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
| | - Adrian Sanchez-Fernandez
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom.,Food Technology, Engineering and Nutrition, Lund University, Box 124, 221 00 Lund, Sweden
| | - Oliver S Hammond
- EPSRC Centre for Doctoral Training in Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom.,Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom.,Laboratoire de Chimie, École Normale Supérieure de Lyon, 46 Allée d'Italie, Lyon 69007, France
| | - Iva Manasi
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
| | - James Doutch
- ISIS Neutron and Muon Source, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - James P Tellam
- ISIS Neutron and Muon Source, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom
| | - Karen J Edler
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, United Kingdom
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19
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First investigation of liposomes behavior and phospholipids organization in choline chloride-based deep eutectic solvents by atomic force microscopy. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Emami S, Shayanfar A. Deep eutectic solvents for pharmaceutical formulation and drug delivery applications. Pharm Dev Technol 2020; 25:779-796. [DOI: 10.1080/10837450.2020.1735414] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Shahram Emami
- Department of Pharmaceutics, School of Pharmacy, Urmia University of Medical Sciences, Urmia, Iran
| | - Ali Shayanfar
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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21
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Warr GG, Atkin R. Solvophobicity and amphiphilic self-assembly in neoteric and nanostructured solvents. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2019.12.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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22
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Bhakuni K, Yadav N, Venkatesu P. A novel amalgamation of deep eutectic solvents and crowders as biocompatible solvent media for enhanced structural and thermal stability of bovine serum albumin. Phys Chem Chem Phys 2020; 22:24410-24422. [DOI: 10.1039/d0cp04397d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This study unravels the effect of a novel solvent medium designed by amalgamation of macromolecular crowders and deep eutectic solvents (DESs) on bovine serum albumin (BSA).
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Affiliation(s)
- Kavya Bhakuni
- Department of Chemistry
- University of Delhi
- Delhi
- India
| | - Niketa Yadav
- Department of Chemistry
- University of Delhi
- Delhi
- India
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23
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Susceptibility of biomembrane structure towards amphiphiles, ionic liquids, and deep eutectic solvents. ADVANCES IN BIOMEMBRANES AND LIPID SELF-ASSEMBLY 2020. [DOI: 10.1016/bs.abl.2020.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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24
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Xu P, Wang Y, Chen J, Wei X, Xu W, Ni R, Meng J, Zhou Y. Development of deep eutectic solvent-based aqueous biphasic system for the extraction of lysozyme. Talanta 2019; 202:1-10. [DOI: 10.1016/j.talanta.2019.04.053] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 04/15/2019] [Accepted: 04/19/2019] [Indexed: 12/29/2022]
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25
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El Achkar T, Fourmentin S, Greige-Gerges H. Deep eutectic solvents: An overview on their interactions with water and biochemical compounds. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111028] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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26
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Li Q, Tong K, Qiu J, Yan M, Tian Q, Chen X, Yue X. Molecular packing of surface active ionic liquids in a deep eutectic solvent: a small angle X-ray scattering (SAXS) study. SOFT MATTER 2019; 15:5060-5066. [PMID: 31180406 DOI: 10.1039/c9sm00760a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During the past decade, deep eutectic solvents (DESs) have shown promising application in the self-assembly of surfactants. Various aggregates such as micelles, vesicles, lyotropic liquid crystals, microemulsions and gels have been reported. In this research, the phase behaviours of imidazolium surface active ionic liquids (SAILs) CnmimBr (n = 12, 14, 16) were investigated in ChG. With the help of small angle X-ray scattering (SAXS), the types and structure parameters of aggregates were determined. The molecular packing of SAILs was influenced by the solvophobic chain length, surfactant concentration, temperature and solvent, accounting for their different aggregation behaviours. This study would give a good description of the molecular packing of surfactants in DESs.
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Affiliation(s)
- Qintang Li
- State Key Laboratory of Environment-friendly Energy Materials, Southwest University of Science and Technology, Mianyang 621000, China.
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27
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Panda S, Kundu K, Kiefer J, Umapathy S, Gardas RL. Molecular-Level Insights into the Microstructure of a Hydrated and Nanoconfined Deep Eutectic Solvent. J Phys Chem B 2019; 123:3359-3371. [PMID: 30924657 DOI: 10.1021/acs.jpcb.9b01603] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Despite the recent advancements in the field of deep eutectic solvents (DESs), their high viscosity often prevents practical applications. A versatile strategy to overcome this problem is either to add a co-solvent or to confine the DES inside a nanoscaled self-organized system. This work assesses the microstructures of a hydrated and nanoconfined DES comprising benzyltripropylammonium chloride [BTPA]Cl and ethylene glycol (EG). They act as a hydrogen-bond acceptor and a donor, respectively. The hydrogen bonding between [BTPA]Cl and EG in the DES (i.e., BTEG) and the molecular states of water in the hydrated BTEG were studied by Raman spectroscopy. The results show different hydrogen-bonding associations between water-water and water-BTEG or EG molecules. In addition, we investigated the confinement effects of BTEG in a Polysorbate 80 (Tween-80)/cyclohexane reverse micellar (RM) system. The results are compared with those of an ionic liquid-encapsulated RM system. The formation, bonding characteristics, and thermal stability of the RM droplets were studied by solubilization, dynamic light scattering, rheology, and Raman spectroscopy experiments. Furthermore, it is shown that hydrogen bonding between the DES and the surfactant leads to a stable RM system. Interestingly, the viscosity of the RM system is significantly lower than that of the neat DES suggesting that DESs have a much wider practical applicability in the form of RMs.
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Affiliation(s)
- Somenath Panda
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
| | - Kaushik Kundu
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Johannes Kiefer
- Technische Thermodynamik , University of Bremen , Bremen 28359 , Germany
| | - Siva Umapathy
- Department of Inorganic and Physical Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Ramesh L Gardas
- Department of Chemistry , Indian Institute of Technology Madras , Chennai 600036 , India
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28
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Stefanovic R, Webber GB, Page AJ. Polymer solvation in choline chloride deep eutectic solvents modulated by the hydrogen bond donor. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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29
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Catanionic and chain-packing effects on surfactant self-assembly in the ionic liquid ethylammonium nitrate. J Colloid Interface Sci 2019; 540:515-523. [DOI: 10.1016/j.jcis.2019.01.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/11/2019] [Accepted: 01/11/2019] [Indexed: 11/19/2022]
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30
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Hammond OS, Li H, Westermann C, Al-Murshedi AYM, Endres F, Abbott AP, Warr GG, Edler KJ, Atkin R. Nanostructure of the deep eutectic solvent/platinum electrode interface as a function of potential and water content. NANOSCALE HORIZONS 2019; 4:158-168. [PMID: 32254151 DOI: 10.1039/c8nh00272j] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The interfacial nanostructure of the three most widely-studied Deep Eutectic Solvents (DESs), choline chloride:urea (ChCl:Urea), choline chloride:ethylene glycol (ChCl:EG), and choline chloride:glycerol (ChCl:Gly) at a Pt(111) electrode has been studied as a function of applied potential and water content up to 50 wt%. Contact mode atomic force microscope (AFM) force-distance curves reveal that for all three DESs, addition of water increases the interfacial nanostructure up to ∼40 wt%, after which it decreases. This differs starkly from ionic liquids, where addition of small amounts of water rapidly decreases the interfacial nanostructure. For the pure DESs, only one interfacial layer is measured at OCP at 0.5 nm, which increases to 3 to 6 layers extending ∼5 nm from the surface at 40 or 50 wt% water. Application of a potential of ±0.25 V to the Pt electrode for the pure DESs increases the number of near surface layers to 3. However, when water is present the applied potential attenuates the steps in the force curve, which are replaced by a short-range exponential decay. This change was most pronounced for ChCl:EG with 30 wt% or 50 wt% water, so this system was probed using cyclic voltammetry, which confirms the interfacial nanostructure is akin to a salt solution.
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Affiliation(s)
- Oliver S Hammond
- Centre for Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2 7AY, UK
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31
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McCluskey AR, Sanchez-Fernandez A, Edler KJ, Parker SC, Jackson AJ, Campbell RA, Arnold T. Bayesian determination of the effect of a deep eutectic solvent on the structure of lipid monolayers. Phys Chem Chem Phys 2019; 21:6133-6141. [DOI: 10.1039/c9cp00203k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A novel reflectometry analysis method reveals the structure of lipid monolayers at the air-DES interface.
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Affiliation(s)
| | | | | | | | - Andrew J. Jackson
- European Spallation Source
- SE-211 00 Lund
- Sweden
- Department of Physical Chemistry
- Lund University
| | - Richard A. Campbell
- Division of Pharmacy and Optometry
- University of Manchester
- Manchester
- UK
- Institut Laue-Langevin
| | - Thomas Arnold
- Department of Chemistry
- University of Bath
- Bath
- UK
- Diamond Light Source
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32
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Pal M, Behera K, Yadav A, Pandey S. Modifying Properties of Aqueous Micellar Solutions by External Additives: Deep Eutectic Solvent versus Its Constituents. ChemistrySelect 2018. [DOI: 10.1002/slct.201802169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mahi Pal
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi -110016 India
| | - Kamalakanta Behera
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi -110016 India
| | - Anita Yadav
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi -110016 India
| | - Siddharth Pandey
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi -110016 India
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33
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Komal, Singh G, Singh G, Kang TS. Aggregation Behavior of Sodium Dioctyl Sulfosuccinate in Deep Eutectic Solvents and Their Mixtures with Water: An Account of Solvent's Polarity, Cohesiveness, and Solvent Structure. ACS OMEGA 2018; 3:13387-13398. [PMID: 31458052 PMCID: PMC6644625 DOI: 10.1021/acsomega.8b01637] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Accepted: 10/02/2018] [Indexed: 06/09/2023]
Abstract
An anionic surfactant sodium dioctyl sulfosuccinate (AOT) aggregates in deep eutectic solvents (DESs) and their mixtures with water (up to 50% w/w) in a contrasting manner. Two DESs, a mixture of choline chloride + urea and choline chloride + ethylene glycol, commonly known as Reline and Ethaline, respectively, are used as solvents. Behavior of AOT at air-solution interface and aggregation in bulk is investigated using surface tension, conductivity, fluorescence, and dynamic light scattering measurements. The obtained results are correlated with structural aspects of solvent systems as well as with inherent properties of solvent such as Kamlet-Taft polarity parameters, degree of cohesiveness derived from Gordon parameter (G), and cohesive energy density. It is observed that the spontaneity of aggregation in neat DESs or DES-water mixtures follows a trend reflected by various solvent parameters. However, characteristic properties of aggregation in water does not fit into this trend, where critical aggregation concentration of AOT is found in between 30 and 50% (w/w) of respective DES-water mixtures. 1H NMR and 1H-1H 2D NOESY spectroscopy is employed to get insights into reason behind this anomalous behavior. It is observed that AOT forms self-assembled structures similar to that of other surfactants in neat DESs, whereas it undergoes nanosegregation in DESs-water mixtures. The present results are expected to be useful for colloidal aspects of DESs and their mixtures with water.
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Affiliation(s)
- Komal
- Department of Chemistry, UGC Sponsored
Centre for Advanced Studies-II, Guru Nanak
Dev University, Amritsar 143005, India
| | - Gagandeep Singh
- Department of Chemistry, UGC Sponsored
Centre for Advanced Studies-II, Guru Nanak
Dev University, Amritsar 143005, India
| | - Gurbir Singh
- Department of Chemistry, UGC Sponsored
Centre for Advanced Studies-II, Guru Nanak
Dev University, Amritsar 143005, India
| | - Tejwant Singh Kang
- Department of Chemistry, UGC Sponsored
Centre for Advanced Studies-II, Guru Nanak
Dev University, Amritsar 143005, India
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Sakuragi M, Tsutsumi S, Kusakabe K. Deep Eutectic Solvent-Induced Structural Transition of Microemulsions Explored with Small-Angle X-ray Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12635-12641. [PMID: 30251861 DOI: 10.1021/acs.langmuir.8b02565] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Microemulsions (MEs) containing deep eutectic solvents (DESs) and water in the inner phase for use in transdermal delivery of poorly soluble drugs were prepared using a mixture of polyoxyethylene sorbitan monooleate (Tween-80) and sorbitan laurate (Span-20) as surfactants. We investigated the effects of the ratios of surfactant (Tween-80/Span-20) and solvents (DES components/water) on the ME structure determined by the analysis of small-angle X-ray scattering profiles with the core-corona model. Tween-80 with an unsaturated long alkyl chain induced a structural transition of MEs from a sphere to a cylinder. DESs caused the aggregation of surfactants due to the solvophobic interactions between DESs and the alkyl chains of surfactants. Transmittance electron microscopy images of MEs indicated the presence of aggregates of the dispersed ME particles with each shape.
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Affiliation(s)
- Mina Sakuragi
- Department of Nanoscience , Sojo University , 4-22-1 Ikeda , Nishi-ku, Kumamoto 860-0082 , Japan
| | - Shinsuke Tsutsumi
- Department of Nanoscience , Sojo University , 4-22-1 Ikeda , Nishi-ku, Kumamoto 860-0082 , Japan
| | - Katsuki Kusakabe
- Department of Nanoscience , Sojo University , 4-22-1 Ikeda , Nishi-ku, Kumamoto 860-0082 , Japan
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35
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Sanchez-Fernandez A, Moody GL, Murfin LC, Arnold T, Jackson AJ, King SM, Lewis SE, Edler KJ. Self-assembly and surface behaviour of pure and mixed zwitterionic amphiphiles in a deep eutectic solvent. SOFT MATTER 2018; 14:5525-5536. [PMID: 29926037 DOI: 10.1039/c8sm00755a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Recent investigations have shown that deep eutectic solvents provide a suitable environment for self-organisation of biomolecules, in particular phospholipids and proteins. However, the solvation of complex lyophilic moieties by deep eutectic solvents still remains unclear. Here we explore the behaviour of zwitterionic surfactants in choline chloride:glycerol eutectic mixture. Dodecyl-2-(trimethylammonio)ethylphosphate and N-alkyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (alkyl = dodecyl, tetradecyl) surfactants were investigated by means of surface tension, X-ray reflectivity and small-angle neutron scattering. These surfactants were found to remain surface active and form globular micelles in deep eutectic solvents. Still, the surface behaviour of these species was found to differ depending on the headgroup and tail structure. The morphology of the micelles also slightly varies between surfactants, demonstrating differences in the packing of individual monomers. The characteristics of mixtures of the dodecyl surfactants is also reported, showing a deviation from ideal mixing associated with attractive interactions between sulfobetaine and phosphocholine headgroups. Such non-ideality results in variation of the surface behaviour and self-assembly of these surfactant mixtures. The results presented here will potentially lead to the development of new alternatives for drug-delivery, protein solubilisation and biosensing through a better fundamental understanding of the behaviour of zwitterionic surfactants in deep eutectic solvents.
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Affiliation(s)
- A Sanchez-Fernandez
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
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36
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Baghlani M, Sadeghi R. Thermodynamics investigation of phase behavior of deep eutectic solvents-polymer aqueous biphasic systems. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.04.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Sanchez-Fernandez A, Hammond OS, Edler KJ, Arnold T, Doutch J, Dalgliesh RM, Li P, Ma K, Jackson AJ. Counterion binding alters surfactant self-assembly in deep eutectic solvents. Phys Chem Chem Phys 2018; 20:13952-13961. [DOI: 10.1039/c8cp01008k] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Counterion adsorption unexpectedly changes self-assembly behaviour in deep eutectic solvents.
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Affiliation(s)
| | - O. S. Hammond
- Centre for Sustainable Chemical Technologies
- University of Bath
- Bath
- UK
| | - K. J. Edler
- Department of Chemistry
- University of Bath
- Bath
- UK
| | - T. Arnold
- Department of Chemistry
- University of Bath
- Bath
- UK
- European Spallation Source
| | - J. Doutch
- ISIS Neutron and Muon Source
- Science and Technology Facilities Council
- Rutherford Appleton Laboratory
- Didcot
- UK
| | - R. M. Dalgliesh
- ISIS Neutron and Muon Source
- Science and Technology Facilities Council
- Rutherford Appleton Laboratory
- Didcot
- UK
| | - P. Li
- ISIS Neutron and Muon Source
- Science and Technology Facilities Council
- Rutherford Appleton Laboratory
- Didcot
- UK
| | - K. Ma
- ISIS Neutron and Muon Source
- Science and Technology Facilities Council
- Rutherford Appleton Laboratory
- Didcot
- UK
| | - A. J. Jackson
- European Spallation Source
- Lund
- Sweden
- Department of Physical Chemistry
- Lund University
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38
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Li Q, Wang J, Lei N, Yan M, Chen X, Yue X. Phase behaviours of a cationic surfactant in deep eutectic solvents: from micelles to lyotropic liquid crystals. Phys Chem Chem Phys 2018; 20:12175-12181. [DOI: 10.1039/c8cp00001h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Various aggregates, including micelles and the hexagonal, bicontinuous cubic and lamellar phases, are formed in deep eutectic solvents.
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Affiliation(s)
- Qintang Li
- State Key Laboratory for Environment-Friendly Energy Materials
- School of Material Science and Engineering
- Southwest University of Science and Technology
- Mianyang 621000
- China
| | - Jiao Wang
- Key Laboratory of Colloid and Interface Chemistry
- Shandong University
- Ministry of Education
- Jinan 250100
- China
| | - Nana Lei
- Key Laboratory of Colloid and Interface Chemistry
- Shandong University
- Ministry of Education
- Jinan 250100
- China
| | - Minhao Yan
- State Key Laboratory for Environment-Friendly Energy Materials
- School of Material Science and Engineering
- Southwest University of Science and Technology
- Mianyang 621000
- China
| | - Xiao Chen
- Key Laboratory of Colloid and Interface Chemistry
- Shandong University
- Ministry of Education
- Jinan 250100
- China
| | - Xiu Yue
- Laboratory of Environmental Sciences and Technology
- Xinjiang Technical Institute of Physics & Chemistry
- Chinese Academy of Sciences
- Urumqi 830011
- China
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39
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Sanchez-Fernandez A, Hammond OS, Jackson AJ, Arnold T, Doutch J, Edler KJ. Surfactant-Solvent Interaction Effects on the Micellization of Cationic Surfactants in a Carboxylic Acid-Based Deep Eutectic Solvent. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14304-14314. [PMID: 29182879 DOI: 10.1021/acs.langmuir.7b03254] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Deep eutectic solvents have been demonstrated to support amphiphile self-assembly, providing potential alternatives as structure-directing agents in the synthesis of nanostructures, and drug delivery. Here we have expanded on this recent research to investigate the self-assembly of alkyltrimethylammonium bromide surfactants in choline chloride:malonic acid deep eutectic solvent and mixtures of the solvent with water. Surface tension and small-angle neutron scattering were used to determine the behavior of the amphiphiles. Surfactants were found to remain active in the solvent, and surface tension measurements revealed changes in the behavior of the surfactants with different levels of hydration. Small-angle neutron scattering shows that in this solvent the micelle shape depends on the surfactant chain length, varying from globular micelles (aspect ratio ∼2) for short chain surfactants to elongated micelles (aspect ratio ∼14) for long chain surfactants even at low surfactant concentration. We suggest that the formation of elongated micelles can be explained through the interaction of the solvent with the surfactant headgroup, since ion-ion interactions between surfactant headgroups and solvent may modify the morphology of the micelles. The presence of water in the deep eutectic solvents promotes an increase in the charge density at the micelle interface and therefore the formation of less elongated, globular micelles.
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Affiliation(s)
- Adrian Sanchez-Fernandez
- Department of Chemistry, University of Bath , Claverton Down, Bath BA2 7AY, U.K
- European Spallation Source , Box 176, 22100 Lund, Sweden
| | - Oliver S Hammond
- Centre for Sustainable Chemical Technologies, University of Bath , Claverton Down, Bath BA2 7AY, U.K
| | - Andrew J Jackson
- European Spallation Source , Box 176, 22100 Lund, Sweden
- Department of Physical Chemistry, Lund University , SE-221 00 Lund, Sweden
| | - Thomas Arnold
- European Spallation Source , Box 176, 22100 Lund, Sweden
| | - James Doutch
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory , Didcot OX11 0QX, U.K
| | - Karen J Edler
- Department of Chemistry, University of Bath , Claverton Down, Bath BA2 7AY, U.K
- Centre for Sustainable Chemical Technologies, University of Bath , Claverton Down, Bath BA2 7AY, U.K
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40
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Chen Z, McDonald S, FitzGerald P, Warr GG, Atkin R. Small angle neutron scattering study of the conformation of poly(ethylene oxide) dissolved in deep eutectic solvents. J Colloid Interface Sci 2017; 506:486-492. [DOI: 10.1016/j.jcis.2017.07.068] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 07/11/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
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41
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Pal M, Yadav A, Pandey S. Aggregation of Carbocyanine Dyes in Choline Chloride-Based Deep Eutectic Solvents in the Presence of an Aqueous Base. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9781-9792. [PMID: 28830142 DOI: 10.1021/acs.langmuir.7b01981] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Deep eutectic solvents (DESs) have shown potential as novel media to support molecular aggregation. The self-aggregation behavior of two common and popular carbocyanine dyes, 5,5',6,6'-tetrachloro-1,1'-diethyl-3,3'-di(4-sulfobutyl)-benzimidazole carbocyanine (TDBC) and 5,5'-dichloro-3,3'-di(3-sulfopropyl)-9-methyl-benzothiacarbo cyanine (DMTC), is investigated within DES-based systems under ambient conditions. Although TDBC is known to form J-aggregates in basic aqueous solution, DMTC forms H-aggregates under similar conditions. The DESs used, glyceline and reline, are composed of salt choline chloride and two vastly different H-bond donors, glycerol and urea, respectively, in 1:2 mol ratios. Both DESs in the presence of base are found to support J-aggregates of TDBC. These fluorescent J-aggregates are characterized by small Stokes' shifts and subnanosecond fluorescence lifetimes. Under similar conditions, DMTC forms fluorescent H-aggregates along with J-aggregates within the two DES-based systems. The addition of cationic surfactant cetyltrimethylammonium bromide (CTAB) below its critical micelle concentration (cmc) to a TDBC solution of aqueous base-added glyceline shows the prominent presence of J-aggregates, and increasing the CTAB concentration to above cmc results in the disruption of J-aggregates and the formation of unprecedented H-aggregates. DMTC exclusively forms H-aggregates within a CTAB solution of aqueous base-added glyceline irrespective of the surfactant concentration. Anionic surfactant, sodium dodecylsulfate (SDS), present below its cmc within aqueous base-added DESs supports J-aggregation by TDBC; for similar SDS addition, DMTC forms H-aggregates within the glyceline-based system whereas both H- and J-aggregates exist within the reline-based system. A comparison of the carbocyanine dye behavior in various aqueous base-added DES systems to that in aqueous basic media reveals contrasting aggregation tendencies and/or efficiencies. Surfactants as additives are demonstrated to control and modulate carbocyanine dye self-aggregation within DES-based media. The unique nature of DESs as alternate media toward affecting cyanine dye aggregation is highlighted.
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Affiliation(s)
- Mahi Pal
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Anita Yadav
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
| | - Siddharth Pandey
- Department of Chemistry, Indian Institute of Technology Delhi , Hauz Khas, New Delhi 110016, India
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42
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Poulos AS, Jones CS, Cabral JT. Dissolution of anionic surfactant mesophases. SOFT MATTER 2017; 13:5332-5340. [PMID: 28702657 DOI: 10.1039/c7sm01096f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Linear and circular solvent penetration experiments are used to study the dissolution of anionic SLE3S surfactant mesophases in water. We show that a lamellar (Lα) phase in contact with water will transit through a series of cubic, hexagonal, and micellar phase bands with sharp interfaces identified from their optical textures. In both linear and circular geometries, the kinetics of front propagation and eventual dissolution are well described by diffusive penetration of water, and a simple model applies to both geometries, with a different effective diffusion coefficient for water Df as the only fitting parameter. Finally, we show a surprising variation of dissolution rates with initial surfactant concentration that can be well explained by assuming that the driving force for solvent penetration is the osmotic pressure difference between neat water and the aqueous fraction of the mesophase that is highly concentrated in surfactant counterions.
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Affiliation(s)
- Andreas S Poulos
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
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43
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Hammond OS, Bowron DT, Jackson AJ, Arnold T, Sanchez-Fernandez A, Tsapatsaris N, Garcia Sakai V, Edler KJ. Resilience of Malic Acid Natural Deep Eutectic Solvent Nanostructure to Solidification and Hydration. J Phys Chem B 2017; 121:7473-7483. [DOI: 10.1021/acs.jpcb.7b05454] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Oliver S. Hammond
- Centre
for Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2
7AY, U.K
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Daniel T. Bowron
- ISIS
Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | - Andrew J. Jackson
- European Spallation
Source, Box 176, 221 00 Lund, Sweden
- Division
of Physical Chemistry, Department of Chemistry, Lund University, Box
124, 221 00 Lund, Sweden
| | - Thomas Arnold
- Diamond
Light Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | | | | | - Victoria Garcia Sakai
- ISIS
Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot OX11 0QX, U.K
| | - Karen J. Edler
- Centre
for Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath BA2
7AY, U.K
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
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44
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Hammond OS, Bowron DT, Edler KJ. The Effect of Water upon Deep Eutectic Solvent Nanostructure: An Unusual Transition from Ionic Mixture to Aqueous Solution. Angew Chem Int Ed Engl 2017; 56:9782-9785. [PMID: 28480595 PMCID: PMC5596335 DOI: 10.1002/anie.201702486] [Citation(s) in RCA: 328] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 04/13/2017] [Indexed: 12/02/2022]
Abstract
The nanostructure of a series of choline chloride/urea/water deep eutectic solvent mixtures was characterized across a wide hydration range by neutron total scattering and empirical potential structure refinement (EPSR). As the structure is significantly altered, even at low hydration levels, reporting the DES water content is important. However, the DES nanostructure is retained to a remarkably high level of water (ca. 42 wt % H2O) because of solvophobic sequestration of water into nanostructured domains around cholinium cations. At 51 wt %/83 mol % H2O, this segregation becomes unfavorable, and the DES structure is disrupted; instead, water–water and DES–water interactions dominate. At and above this hydration level, the DES–water mixture is best described as an aqueous solution of DES components.
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Affiliation(s)
- Oliver S Hammond
- Centre for Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Daniel T Bowron
- ISIS Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell, Oxford, OX11 0QX, UK
| | - Karen J Edler
- Centre for Sustainable Chemical Technologies, University of Bath, Claverton Down, Bath, BA2 7AY, UK
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45
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Hammond OS, Bowron DT, Edler KJ. The Effect of Water upon Deep Eutectic Solvent Nanostructure: An Unusual Transition from Ionic Mixture to Aqueous Solution. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702486] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Oliver S. Hammond
- Centre for Sustainable Chemical TechnologiesUniversity of Bath Claverton Down Bath BA2 7AY UK
| | - Daniel T. Bowron
- ISIS Neutron and Muon SourceSTFC Rutherford Appleton Laboratory, Harwell Oxford OX11 0QX UK
| | - Karen J. Edler
- Centre for Sustainable Chemical TechnologiesUniversity of Bath Claverton Down Bath BA2 7AY UK
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46
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Effect of cation alkyl chain length on surface forces and physical properties in deep eutectic solvents. J Colloid Interface Sci 2017; 494:373-379. [DOI: 10.1016/j.jcis.2017.01.109] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 01/27/2017] [Accepted: 01/27/2017] [Indexed: 11/24/2022]
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47
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Bryant SJ, Wood K, Atkin R, Warr GG. Effect of protic ionic liquid nanostructure on phospholipid vesicle formation. SOFT MATTER 2017; 13:1364-1370. [PMID: 28111683 DOI: 10.1039/c6sm02652d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The formation of bilayer-based lyotropic liquid crystals and vesicle dispersions by phospholipids in a range of protic ionic liquids has been investigated by polarizing optical microscopy using isothermal penetration scans, differential scanning calorimetry, and small angle X-ray and neutron scattering. The stability and structure of both lamellar phases and vesicle dispersions is found to depend primarily on the underlying amphiphilic nanostructure of the ionic liquid itself. This finding has significant implications for the use of ionic liquids in soft and biological materials and for biopreservation, and demonstrates how vesicle structure and properties can be controlled through selection of cation and anion. For a given ionic liquid, systematic trends in bilayer thickness, chain-melting temperature and enthalpy increase with phospholipid acyl chain length, paralleling behaviour in aqueous systems.
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Affiliation(s)
- Saffron J Bryant
- School of Chemistry, F11, The University of Sydney, NSW 2006, Australia.
| | - Kathleen Wood
- Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC NSW 2232, Australia
| | - Rob Atkin
- Discipline of Chemistry, The University of Newcastle, Newcastle, NSW 2308, Australia
| | - Gregory G Warr
- School of Chemistry, F11, The University of Sydney, NSW 2006, Australia.
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48
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Facchin M, Scarso A, Selva M, Perosa A, Riello P. Towards life in hydrocarbons: aggregation behaviour of “reverse” surfactants in cyclohexane. RSC Adv 2017. [DOI: 10.1039/c7ra01027c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Unconventional life forms based on membranes able to self-assemble in hydrocarbons instead of water might exist in the hydrocarbon-rich environment of Titan. We present evidence of the self-assembly of reverse surfactants to yield typical micelles in a hydrocarbon solvent.
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Affiliation(s)
- M. Facchin
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - A. Scarso
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - M. Selva
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - A. Perosa
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
| | - P. Riello
- Dipartimento di Scienze Molecolari e Nanosistemi
- Laboratorio di Sistemi Chimici Complessi
- Università Ca' Foscari Venezia
- 30172 Venezia Mestre
- Italy
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49
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Sanchez-Fernandez A, Edler KJ, Arnold T, Alba Venero D, Jackson AJ. Protein conformation in pure and hydrated deep eutectic solvents. Phys Chem Chem Phys 2017; 19:8667-8670. [DOI: 10.1039/c7cp00459a] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Deep eutectic solvents as media for protein stabilisation: conformation in the absence and presence of water.
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Affiliation(s)
- A. Sanchez-Fernandez
- Department of Chemistry, University of Bath, Claverton Down
- Bath
- UK
- European Spallation Source
- Lund
| | - K. J. Edler
- Department of Chemistry, University of Bath, Claverton Down
- Bath
- UK
| | - T. Arnold
- Diamond Light Source, Harwell Campus
- Didcot
- UK
| | | | - A. J. Jackson
- European Spallation Source
- Lund
- Sweden
- Department of Physical Chemistry
- Lund University
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50
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Kaur S, Gupta A, Kashyap HK. Nanoscale Spatial Heterogeneity in Deep Eutectic Solvents. J Phys Chem B 2016; 120:6712-20. [DOI: 10.1021/acs.jpcb.6b04187] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Supreet Kaur
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Aditya Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Hemant K. Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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