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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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Deepika Amirchand K, Kaur K, Singh V. Biochar Based Self Cleaning Superhydrophobic Surface with Aqueous DESphobic Properties. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Stephens NM, Smith EA. Structure of Deep Eutectic Solvents (DESs): What We Know, What We Want to Know, and Why We Need to Know It. Langmuir 2022; 38:14017-14024. [PMID: 36346803 DOI: 10.1021/acs.langmuir.2c02116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Deep eutectic solvents (DESs) are a tunable class of solvents with many advantageous properties including good thermal stability, facile synthesis, low vapor pressure, and low-to-negligible toxicity. DESs are composed of hydrogen bond donors and acceptors that, when combined, significantly decrease the freezing point of the resulting solvent. DESs have distinct interfacial and bulk structural heterogeneity compared to traditional solvents, in part due to various intramolecular and intermolecular interactions. Many of the physiochemical properties observed for DESs are influenced by structure. However, our understanding of the interfacial and bulk structure of DESs is incomplete. To fully exploit these solvents in a range of applications including catalysis, separations, and electrochemistry, a better understanding of DES structure must be obtained. In this Perspective, we provide an overview of the current knowledge of the interfacial and bulk structure of DESs and suggest future research directions to improve our understanding of this important information.
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Affiliation(s)
- Nicole M Stephens
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011-3111, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
| | - Emily A Smith
- Ames National Laboratory, U.S. Department of Energy, Ames, Iowa 50011-3111, United States
- Department of Chemistry, Iowa State University, Ames, Iowa 50011-3111, United States
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Elderderi S, Sacré P, Wils L, Chourpa I, Elbashir AA, Hubert P, Byrne HJ, Boudesocque-delaye L, Ziemons E, Bonnier F. Comparison of Vibrational Spectroscopic Techniques for Quantification of Water in Natural Deep Eutectic Solvents. Molecules 2022; 27:4819. [PMID: 35956767 PMCID: PMC9370017 DOI: 10.3390/molecules27154819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/22/2022] [Accepted: 07/23/2022] [Indexed: 11/17/2022] Open
Abstract
Vibrational spectroscopic techniques, i.e., attenuated total reflectance infrared (ATR-IR), near infrared spectroscopy (NIRS) and Raman spectroscopy (RS), coupled with Partial Least Squares Regression (PLSR), were evaluated as cost-effective label-free and reagent-free tools to monitor water content in Levulinic Acid/L-Proline (LALP) (2:1, mol/mol) Natural Deep Eutectic Solvent (NADES). ATR-IR delivered the best outcome of Root Mean Squared Error (RMSE) of Cross-Validation (CV) = 0.27% added water concentration, RMSE of Prediction (P) = 0.27% added water concentration and mean % relative error = 2.59%. Two NIRS instruments (benchtop and handheld) were also compared during the study, respectively yielding RMSECV = 0.35% added water concentration, RMSEP = 0.56% added water concentration and mean % relative error = 5.13% added water concentration, and RMECV = 0.36% added water concentration, RMSEP = 0.68% added water concentration and mean % relative error = 6.23%. RS analysis performed in quartz cuvettes enabled accurate water quantification with RMECV = 0.43% added water concentration, RMSEP = 0.67% added water concentration and mean % relative error = 6.75%. While the vibrational spectroscopic techniques studied have shown high performance in relation to reliable determination of water concentration, their accuracy is most likely related to their sensitivity to detect the LALP compounds in the NADES. For instance, whereas ATR-IR spectra display strong features from water, Levulinic Acid and L-Proline that contribute to the PLSR predictive models constructed, NIRS and RS spectra are respectively dominated by either water or LALP compounds, representing partial molecular information and moderate accuracy compared to ATR-IR. However, while ATR-IR instruments are common in chemistry and physics laboratories, making the technique readily transferable to water quantification in NADES, Raman spectroscopy offers promising potential for future development for in situ, sample withdrawal-free analysis for high throughput and online monitoring.
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Liu Y, Wu Y, Liu J, Wang W, Yang Q, Yang G. Deep eutectic solvents: Recent advances in fabrication approaches and pharmaceutical applications. Int J Pharm 2022; 622:121811. [PMID: 35550409 DOI: 10.1016/j.ijpharm.2022.121811] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/25/2022] [Accepted: 05/05/2022] [Indexed: 12/25/2022]
Abstract
Deep eutectic solvents (DESs) have received increasing attention in the past decade owing to their distinguished properties including biocompatibility, tunability, thermal and chemical stability. Particularly, DESs have joined forces in pharmaceutical industry, not only to efficiently separate actives from natural products, but also to dramatically increase solubility and permeability of drugs, both are critical for the drug absorption and efficacy. As a result, lately DESs have been extensively and practically adopted as versatile drug delivery systems for different routes such as nasal, transdermal and oral administration with enhanced bioavailability. This review summarizes the emerging progress of DESs by introducing applied fabrication approaches with advantages and limitations thereof, and by highlighting the pharmaceutical applications of DESs.
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Affiliation(s)
- Yiwen Liu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yujing Wu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jinming Liu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Wenxi Wang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Qingliang Yang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Research Institute of Pharmaceutical Particle Technology, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Gensheng Yang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China; Research Institute of Pharmaceutical Particle Technology, Zhejiang University of Technology, Hangzhou 310014, China.
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Wu J, Zhou R, Radjenovic PM, Liu S, Wu D, Li J, Mao B, Yan J. Electrochemical impedance spectroscopy and Raman spectroscopy studies on electrochemical interface between Au(111) electrode and ethaline deep eutectic solvent. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138859] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Kalhor P, Yarivand O, Seifpanahi-Shabani K. Quantum chemical calculations on dissolution of dimethylformamide in ethaline. J Mol Graph Model 2021; 107:107966. [PMID: 34174555 DOI: 10.1016/j.jmgm.2021.107966] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 05/23/2021] [Accepted: 06/06/2021] [Indexed: 11/22/2022]
Abstract
Deep-eutectic solvents (DESs) gained attention of researchers as green solvents. Making binary mixtures of DESs with appropriate cosolvents is a strategy to obtain more favorable mixtures. Here, structural features and hydrogen bonding (H-bonding) properties of binary mixtures containing ethaline (ETH) DES, (choline chloride (ChCl):2 ethylene glycol (EG)) with N,N-dimethylformamide (DMF) are reported. Such investigations are carried out by density functional theory (DFT) calculations. The results show that in ETH-DMF mixtures, DMF molecules can hardly overcome the strong Columbic interaction and doubly ionic H-bonds between the ions Ch+ and Cl- or the ionic H-bonds between Ch+ and EG. Upon EG addition to ChCl to obtain ETH or DMF addition to ETH, the Cl- … Ch+ connectivity decreases, implying charge delocalization from Cl- to other components rather than Ch+. This is supported by the blue shift of Ch+ hydroxyl observed in the calculated infrared spectra.
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Xiong D, Zhang Q, Ma W, Wang Y, Wan W, Shi Y, Wang J. Temperature-switchable deep eutectic solvents for selective separation of aromatic amino acids in water. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118479] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Das N, Khan T, Subba N, Sen P. Correlating Bromelain's activity with its structure and active-site dynamics and the medium's physical properties in a hydrated deep eutectic solvent. Phys Chem Chem Phys 2021; 23:9337-9346. [PMID: 33885064 DOI: 10.1039/d1cp00046b] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Deep eutectic solvents (DESs) are emerging as new media of choice for biocatalysis due to their environmentally friendly nature, fine-tunability, and potential biocompatibility. This work deciphers the behaviour of bromelain in a ternary DES composed of acetamide, urea, and sorbitol at mole fractions of 0.5, 0.3, and 0.2, respectively (0.5Ac/0.3Ur/0.2Sor), with various degrees of hydration. Bromelain is an essential industrial proteolytic enzyme, and the chosen DES is non-ionic and liquid at room temperature. This provides us with a unique opportunity to contemplate protein behaviour in a non-ionic DES for the very first time. Our results infer that at a low DES concentration (up to 30% V/V DES), bromelain adopts a more compact structural conformation, whereas at higher DES concentrations, it becomes somewhat elongated. The microsecond conformational fluctuation time around the active site of bromelain gradually increases with increasing DES concentration, especially beyond 30% V/V. Interestingly, bromelain retains most of its enzymatic activity in the DES, and at some concentrations, the activity is even higher compared with its native state. Furthermore, we correlate the activity of bromelain with its structure, its active-site dynamics, and the physical properties of the medium. Our results demonstrate that the compact structural conformation and flexibility of the active site of bromelain favour its proteolytic activity. Similarly, a medium with increased polarity and decreased viscosity is favourable for its activity. The presented physical insights into how enzymatic activity depends on the protein structure and dynamics and the physical properties of the medium might provide useful guidelines for the rational design of DESs as biocatalytic media.
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Affiliation(s)
- Nilimesh Das
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur - 208 016, UP, India.
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Affiliation(s)
- Supreet Kaur
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Monika Kumari
- 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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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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