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Kumar K, Umapathi R, Venkatesu P. Ionic Liquids Mediated Micellization of Pluronic Copolymers: Aggregation Behavior of Amphiphilic Triblock Copolymers. J Phys Chem B 2023; 127:2107-2120. [PMID: 36867763 DOI: 10.1021/acs.jpcb.2c05683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Understanding the micellization of amphiphilic triblock copolymers, especially Pluronics can play a persuasive role in engineering "smart" formulations for drug delivery applications. Their underlying self-assembly in the presence of designer solvents such as ionic liquids (ILs) provides combinatorial benefits of unique munificent properties of ILs and copolymers. The complex molecular interactions in the Pluronic copolymers/ILs mixed system influence the aggregation mechanism of copolymers depending on various aspects with no standardized factors to govern the structure-property relationship, which led to the practical applications. Here, we summarized recent progress in understanding the micellization process of IL-Pluronic mixed systems. Special emphasis was given to pure Pluronic systems (i.e., PEO-PPO-PEO) without any structural modifications, such as copolymerization with other functional groups, and ILs having cholinium and imidazolium groups. We expect that the correlation between existing/developing experimental and theoretical studies will provide the necessary basis and impetus for successful utilization in drug delivery applications.
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Affiliation(s)
- Krishan Kumar
- Department of Chemistry, University of Delhi, Delhi 110 007, India.,Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea.,POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, 20018, Danostia-San Sebastian, Spain
| | - Reddicherla Umapathi
- Department of Biological Sciences and Bioengineering, Inha University, Incheon 22212, Republic of Korea
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2
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Luo H, Jiang K, Wang X, Yao H, Liang X, Li Y, Liu H. How multiple noncovalent interactions regulate the aggregation behavior of amphiphilic triblock copolymer/surface-active ionic liquid mixtures. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Bhattacharjee S, Pandit S, Seth D. How Kosmotropic and Chaotropic Osmolytes Perturb the Properties of an Aqueous Solution of a Pluronic Block Copolymer? LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9347-9362. [PMID: 35868256 DOI: 10.1021/acs.langmuir.2c01207] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Poloxamer 407 (P-407) composed of a poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (PEG-PPG-PEG) unit has two distinct microenvironments: the interior core formed by the PPG unit and the exterior shell formed by the PEG unit. In this work, we have used two fluorescent molecules coumarin-153 and 8-anilino-1-naphthalene sulfonic acid (ANS) of contrasting natures to characterize and probe the water dynamics in the core and corona regions of the copolymer by means of spectroscopic techniques, namely, absorption, fluorescence, and time-resolved fluorescence emission spectroscopy and Fourier transform infrared (FTIR) spectroscopy. Changes in the surface morphologies were characterized by using microscopic techniques. Further, two classes of osmolytes kosmotropic (betaine and sarcosine) and chaotropic (urea) known to perturb the water structure were added to aqueous solutions of P-407. Our studies reveal that the addition of kosmotropes decreases the critical micelle temperature (CMT) of the copolymer, whereas the chaotropic osmolyte increases the CMT. Steady-state studies reveal that the addition of the osmolytes to the copolymer increases the polarity of the micelle formed and hence results in the red shift in the ANS absorbance maximum. FTIR spectroscopy reveals that kosmotropes interact with the PEG moiety of the copolymer, whereas the chaotrope interacts with both the PEG and PPG moieties of the copolymer. Solvent relaxation studies produced less changes upon the addition of the kosmotropes, whereas a greater change in the relaxation time was observed in the presence of the chaotrope.
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Affiliation(s)
- Sanyukta Bhattacharjee
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar 801103, India
| | - Souvik Pandit
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar 801103, India
| | - Debabrata Seth
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar 801103, India
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4
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Abstract
"There's plenty of room at the bottom" (Richard Feynman, 1959): an invitation for (metalla)carboranes to enter the (new) field of nanomedicine. For two decades, the number of publications on boron cluster compounds designed for potential applications in medicine has been constantly increasing. Hundreds of compounds have been screened in vitro or in vivo for a variety of biological activities (chemotherapeutics, radiotherapeutics, antiviral, etc.), and some have shown rather promising potential for further development. However, until now, no boron cluster compounds have made it to the clinic, and even clinical trials have been very sparse. This review introduces a new perspective in the field of medicinal boron chemistry, namely that boron-based drugs should be regarded as nanomedicine platforms, due to their peculiar self-assembly behaviour in aqueous solutions, and treated as such. Examples for boron-based 12- and 11-vertex clusters and appropriate comparative studies from medicinal (in)organic chemistry and nanomedicine, highlighting similarities, differences and gaps in physicochemical and biological characterisation methods, are provided to encourage medicinal boron chemists to fill in the gaps between chemistry laboratory and real applications in living systems by employing bioanalytical and biophysical methods for characterising and controlling the aggregation behaviour of the clusters in solution.
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Affiliation(s)
- Marta Gozzi
- Institute of Inorganic ChemistryFaculty of Chemistry and MineralogyLeipzig UniversityJohannisallee 2904103LeipzigGermany
- Institute of Analytical ChemistryFaculty of Chemistry and MineralogyLeipzig UniversityLinnéstr. 304103LeipzigGermany
- Institute of Medicinal Physics and BiophysicsFaculty of MedicineLeipzig UniversityHärtelstr. 16–1804107LeipzigGermany
| | - Benedikt Schwarze
- Institute of Medicinal Physics and BiophysicsFaculty of MedicineLeipzig UniversityHärtelstr. 16–1804107LeipzigGermany
| | - Evamarie Hey‐Hawkins
- Institute of Inorganic ChemistryFaculty of Chemistry and MineralogyLeipzig UniversityJohannisallee 2904103LeipzigGermany
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5
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Pérez-Sánchez G, Schaeffer N, Lopes AM, Pereira JFB, Coutinho JAP. Using coarse-grained molecular dynamics to understand the effect of ionic liquids on the aggregation of Pluronic copolymer solutions. Phys Chem Chem Phys 2021; 23:5824-5833. [PMID: 33687390 DOI: 10.1039/d0cp06572b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This study is aimed to enhance the understanding of the interaction between ionic liquids (ILs) and non-ionic Pluronic triblock copolymers in aqueous two-phase micellar systems (ATPMS) used for the selective separation/purification of hydrophobic biomolecules. The ILs allow a precise control of the cloud point phase separation temperature (CPT), particularly important when the stability of the molecule is highly dependent on temperature. The effect of choline-based ILs, with two different counter-anions, chloride and hexanoate, was evaluated using molecular dynamics simulations (MD) for F-68 and L-35 Pluronic aqueous solutions. The simulations revealed the role played by the anions during the Pluronic self-assembly, with choline chloride hindering Pluronic aggregation and the choline hexanoate favouring micelle formation and coalescence, in agreement with the experimental data. A detailed study of the accessible surface area of Pluronic showed a progressive dehydration of the Pluronic hydrophilic micelle corona in choline hexanoate mixtures promoting inter-micelle interactions and, consequently, micelle coalescence. With the addition of choline hexanoate, it was observed that the hydrophilic segments, which form the micelle corona, twisted towards the Pluronic micelle core. The electrostatic interaction is also shown to play a key role in this IL-Pluronic aqueous solution, as the hexanoate anions are accommodated in the Pluronic micelle core, while the choline cations are hosted by the Pluronic micelle corona, with the ions interacting with each other during the self-assembly process. In addition, a comparison study of F-68 and L-35 aqueous solutions shows that the IL impact depends on the length of the Pluronic hydrophilic segment. This work provides a realistic microscopic scenario of the complex interactions between Pluronic copolymers and ILs.
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Affiliation(s)
- Germán Pérez-Sánchez
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 - Aveiro, Portugal.
| | - Nicolas Schaeffer
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 - Aveiro, Portugal.
| | - André M Lopes
- Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, SP, Brazil
| | - Jorge F B Pereira
- Univ Coimbra, CIEPQPF, Department of Chemical Engineering, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal
| | - João A P Coutinho
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-1933 - Aveiro, Portugal.
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6
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Pandey P, Somers AE, Hait SK, Forsyth M, Ramakumar SSV. A novel approach to improve the oil miscibility and incorporate multifunctionality in ionic liquids as lubricant additives. Phys Chem Chem Phys 2021; 23:3429-3440. [PMID: 33506849 DOI: 10.1039/d0cp05295g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Recently ionic liquids (ILs) have shown promising tribological properties as additives in base oils; however their lack of miscibility is a problem, with very few ILs being compatible with lubricant oil formulation (non-polar base oils). This work shows the use of a surfactant which can increase the range of available ILs that are stable when added to these base oils. In this study a range of tetraalkylphosphonium based ILs were successfully blended with a PIBSA surfactant and these blends were all shown to be miscible in a non-polar base oil. Without the PIBSA a number of the ILs were immiscible in the base oil. The tribological properties of IL additives that are miscible in the non-polar base oils were compared with and without the surfactant present and showed that the presence of the PIBSA did not affect the IL additives performance. Additionally, two ILs that are immiscible without the surfactant showed the greatest reduction in friction and wear. SEM analysis showed an increase in the amount of phosphorus on the wear surface when the surfactant was present, suggesting that the PIBSA enhances tribo-film formation. NMR, FTIR, DLS and TEM investigations into the interactions between the PIBSA and the ILs showed that the improved stability in the base oil may be due to intermolecular interactions such as hydrophobic, van der Waals, dipole-dipole or ion-dipole that reduce the size distribution of the previously immiscible ILs. The presence of the ILs was also shown to improve the resistance to corrosion. Prior to this study the ILs available for use as lubricant additives was severely limited and compromised, mostly based upon their miscibility. Here the use of PIBSA to increase the range of ILs available as lubricant additives has vastly improved the promise that they represent in this area.
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Affiliation(s)
- Priya Pandey
- Deakin University, Institute for Frontier Materials, 221 Burwood Hwy, Burwood, Victoria, Australia.
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Kurnik IS, D'Angelo NA, Mazzola PG, Chorilli M, Kamei DT, Pereira JFB, Vicente AA, Lopes AM. Polymeric micelles using cholinium-based ionic liquids for the encapsulation and release of hydrophobic drug molecules. Biomater Sci 2021; 9:2183-2196. [DOI: 10.1039/d0bm01884h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We generated stable amphiphilic copolymer-based polymeric micelles (PMs) with temperature-responsive properties utilizing Pluronic® L35 and a variety of ionic liquids (ILs) for the encapsulation and release of curcumin.
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Affiliation(s)
- Isabelle S. Kurnik
- Department of Engineering of Bioprocesses and Biotechnology
- School of Pharmaceutical Sciences
- São Paulo State University (UNESP)
- Araraquara
- Brazil
| | | | | | - Marlus Chorilli
- Department of Drugs and Medicines
- School of Pharmaceutical Sciences
- São Paulo State University (UNESP)
- Araraquara
- Brazil
| | - Daniel T. Kamei
- Department of Bioengineering
- University of California
- Los Angeles
- USA
| | - Jorge F. B. Pereira
- University of Coimbra
- CIEPQPF
- Department of Chemical Engineering
- Coimbra
- Portugal
| | | | - André M. Lopes
- Faculty of Pharmaceutical Sciences
- University of Campinas
- Campinas
- Brazil
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8
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Kurnik IS, Noronha MA, Câmara MC, Mazzola PG, Vicente AA, Pereira JF, Lopes AM. Separation and purification of curcumin using novel aqueous two-phase micellar systems composed of amphiphilic copolymer and cholinium ionic liquids. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117262] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Kurnik IS, Mussagy CU, Pereira JF, Lopes AM. Amphiphilic copolymer aqueous solutions with cholinium ionic liquids as adjuvants: New insights into determination of binodal curves and phase-separation mechanisms. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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10
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Ben Henda M. Effect of Pyrrolidinium Formate Ionic Liquid on Micellization of Direct and Reverse Pluronics in Aqueous Solutions. J Phys Chem B 2020; 124:5730-5739. [PMID: 32597658 DOI: 10.1021/acs.jpcb.0c01335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The behavior of direct and reverse Pluronic, copolymer nonionic surfactants, poly(ethylene oxide) PEO, and poly(propylene oxide) PPO copolymers, in aqueous solution and in the pyrrolidinium formate ([pyrr][F]) ionic liquid, was investigated using Fourier transform infrared spectroscopy (FTIR spectroscopy). The study was performed for a fixed Pluronic concentration at room temperature. We showed that in aqueous solution, the spectra associated with the direct and reverse Pluronics are similar irrespective of the difference in length of the various PPO and PEO blocks, their positions and the PPO:PEO ratio. The study of those same Pluronics dissolved in a pure pyrrolidinium formate solution showed that the Pluronic types were soluble and that the micellization process can take place at room temperature. The interaction between the Pluronic 10R5 aqueous solutions and the [pyrr][F] for various ionic liquid volumes is reported.
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Affiliation(s)
- M Ben Henda
- Physics Department, College of Science, Al-Zulfi, Majmaah University, Al-Majmaah, 11952, Saudi Arabia.,Physics Laboratory of Soft Matter and Electromagnetic Modelling, Faculty of Sciences of Tunis, Tunis El Manar University 2092 Tunis, Tunisia
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11
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Vyas B, Pillai SA, Ray D, Aswal VK, Wang MR, Chen LJ, Bahadur P. Interactions of alkyltriphenyl phosphonium based ionic liquids with block copolymer microstructures: A multitechnique study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Ion-association vis á vis hydrophobic effect in novel ionic liquids-tetraalkylphosphonium/polyisobutylenesuccinimide-tethered tetraalkylammonium diarylphosphates/thiophosphates: Synthesis and application. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.112084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Hashemi S, Saien J. Equilibrium and dynamic interfacial tensions of oil/water in the presence of an imidazolium ionic liquid strengthen with magnetite nanoparticles. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.101] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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14
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Li J, Huang WC, Gao L, Sun J, Liu Z, Mao X. Efficient enzymatic hydrolysis of ionic liquid pretreated chitin and its dissolution mechanism. Carbohydr Polym 2019; 211:329-335. [PMID: 30824097 DOI: 10.1016/j.carbpol.2019.02.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 01/28/2019] [Accepted: 02/08/2019] [Indexed: 01/08/2023]
Abstract
Colloidal chitin, the substrate of chitinase with an open hydrated gel-like structure, can be obtained by treatment using either traditional hydrochloric acid (HCl) or ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]). IL-pretreated chitin provided an efficient production of N-acetylglucosamine (175.62 mg g chitin) and N,N'-diacetylchitobiose (341.70 mg g chitin) with a conversion of 61.49% at 48 h catalyzed by chitinase from Streptomyces albolongus ATCC 27414. A short time second homogenization treatment after IL pretreatment can increase the conversion to 76.11%. A comprehensive characterization and comparison of chitin with different pretreatments suggested that enzymatic performances were correlated with the structural changes (size of the grains and porosity), high decrease in crystallinity, and high enzyme adsorption. The NMR spectroscopy studies of N-acetylglucosamine solvation in [Emim][OAc] clearly suggest that hydrogen bonding is formed between the hydroxyls of N-acetylglucosamine and both the anions and cations of the IL.
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Affiliation(s)
- Jing Li
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Wen-Can Huang
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Li Gao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Jianan Sun
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Zhen Liu
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
| | - Xiangzhao Mao
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266200, China.
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15
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Banerjee S, Omlor A, Wolny JA, Han Y, Lermyte F, Godfrey AE, O'Connor PB, Schünemann V, Danaie M, Sadler PJ. Generation of maghemite nanocrystals from iron–sulfur centres. Dalton Trans 2019; 48:9564-9569. [DOI: 10.1039/c9dt00514e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Electron beam induced generation of maghemite nanocrystals from polymer-encapsulated iron–sulfur centres.
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Affiliation(s)
- Samya Banerjee
- Department of Chemistry
- University of Warwick
- Coventry CV4 7AL
- UK
| | - Andreas Omlor
- Department of Physics
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
| | - Juliusz A. Wolny
- Department of Physics
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
| | - Yisong Han
- Department of Physics
- University of Warwick
- Coventry CV4 7Al
- UK
| | - Frederik Lermyte
- Department of Chemistry
- University of Warwick
- Coventry CV4 7AL
- UK
- School of Engineering
| | - Amy E. Godfrey
- Department of Chemistry
- University of Warwick
- Coventry CV4 7AL
- UK
| | | | - Volker Schünemann
- Department of Physics
- Technische Universität Kaiserslautern
- 67663 Kaiserslautern
- Germany
| | - Mohsen Danaie
- Diamond Light Source Ltd
- electron Physical Science Imaging Centre (ePSIC)
- Harwell Science & Innovation Campus
- Didcot
- Oxfordshire OX11 0DE
| | - Peter J. Sadler
- Department of Chemistry
- University of Warwick
- Coventry CV4 7AL
- UK
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16
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Agafonov M, Volkova T, Kumeev R, Chibunova E, Terekhova I. Impact of pluronic F127 on aqueous solubility and membrane permeability of antirheumatic compounds of different structure and polarity. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.060] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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17
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Patidar P, Bahadur A, Prasad K, Tiwari S, Aswal VK, Bahadur P. Synthesis, self-assembly and micellization characteristics of choline alkanoate ionic liquids in association with a star block copolymer. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Morphological transformations in Triton X-100 micelles modulated by imidazolium and pyridinium type Ionic Liquids: Investigations by scattering techniques. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.11.076] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhao X, Li S, Cheng H, Schmidt J, Thomas A. Ionic Liquid-Assisted Synthesis of Mesoporous Carbons with Surface-Enriched Nitrogen for the Hydrogen Evolution Reaction. ACS APPLIED MATERIALS & INTERFACES 2018; 10:3912-3920. [PMID: 29266923 DOI: 10.1021/acsami.7b14919] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Heteroatom-doped carbon materials are promising metal-free catalysts for the hydrogen evolution reaction (HER) at low voltage with high durability. However, many of the active sites introduced by heteroatom doping are hardly accessible within the bulk carbon structure and consequently contribute little to the catalytic activity. Here we report a facile ionic liquid-assisted method for synthesizing mesoporous nitrogen-doped carbons, enabling enrichment of nitrogen atoms at the pore surface, demonstrated by X-ray photoelectron spectroscopy (XPS) and temperature-programmed desorption of carbon dioxide (CO2-TPD). The resulting metal-free nitrogen-doped mesoporous carbons exhibit a remarkable electrocatalytic activity in HER. The accessible and efficient utilization of nitrogen atoms is responsible for the superior HER catalytic activity.
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Affiliation(s)
- Xiaojia Zhao
- Department of Chemistry, Division of Functional Materials, Technical University Berlin , Hardenbergstraße 40, 10623 Berlin, Germany
| | - Shuang Li
- Department of Chemistry, Division of Functional Materials, Technical University Berlin , Hardenbergstraße 40, 10623 Berlin, Germany
| | - Hefeng Cheng
- Department of Chemistry, Division of Functional Materials, Technical University Berlin , Hardenbergstraße 40, 10623 Berlin, Germany
| | - Johannes Schmidt
- Department of Chemistry, Division of Functional Materials, Technical University Berlin , Hardenbergstraße 40, 10623 Berlin, Germany
| | - Arne Thomas
- Department of Chemistry, Division of Functional Materials, Technical University Berlin , Hardenbergstraße 40, 10623 Berlin, Germany
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Patidar P, Bahadur A. Modulating effect of different biomolecules and other additives on cloud point and aggregation of amphiphilic linear and starblock copolymer. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.11.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Umapathi R, Reddy PM, Rani A, Venkatesu P. Influence of additives on thermoresponsive polymers in aqueous media: a case study of poly(N-isopropylacrylamide). Phys Chem Chem Phys 2018; 20:9717-9744. [DOI: 10.1039/c7cp08172c] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Thermoresponsive polymers (TRPs) in different solvent media have been studied over a long period and are important from both scientific and technical points of view.
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Affiliation(s)
| | - P. Madhusudhana Reddy
- Department of Chemistry
- University of Delhi
- Delhi-110 007
- India
- Department of Chemical Engineering
| | - Anjeeta Rani
- Department of Chemistry
- University of Delhi
- Delhi-110 007
- India
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22
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Synthesis, Characterization, Surface Properties and Micellization Behaviour of Imidazolium-based Ionic Liquids. J SURFACTANTS DETERG 2017. [DOI: 10.1007/s11743-017-2021-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Bhat PA, Chat OA, Dar AA. Studies on binary mixtures of Pluronic P123 and twin tailed 1-Butyl-3-methyl-imidazolium Aerosol OT - Aggregation behavior and impact on Naproxen and Rifampicin partitioning. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.05.140] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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24
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Bila WC, Mariano RMDS, Silva VR, Dos Santos MESM, Lamounier JA, Ferriolli E, Galdino AS. Applications of deuterium oxide in human health. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES 2017; 53:327-343. [PMID: 28165769 DOI: 10.1080/10256016.2017.1281806] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 10/12/2016] [Indexed: 06/06/2023]
Abstract
The main aim goal of this review was to gather information about recent publications related to deuterium oxide (D2O), and its use as a scientific tool related to human health. Searches were made in electronic databases Pubmed, Scielo, Lilacs, Medline and Cochrane. Moreover, the following patent databases were consulted: EPO (Espacenet patent search), USPTO (United States Patent and Trademark Office) and Google Patents, which cover researches worldwide related to innovations using D2O.
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Affiliation(s)
- Wendell Costa Bila
- a Graduate Programme in Health Sciences , Federal University of São João Del Rei-West Centre Campus , Divinópolis , Brazil
| | - Reysla Maria da Silveira Mariano
- b Graduate Programme in Biochemistry and Molecular Biology , Federal University of São João del Rei , Divinópolis , Brazil
- c Graduate Program in Biotechnology , Federal University of São João del Rei , Divinópolis , Brazil
| | - Valmin Ramos Silva
- d Faculty of Medicine, School of Sciences of Santa Casa de Misericórdia of Vitória , Nossa Senhora da Glória Children's Hospital , Vitória , Brazil
| | | | - Joel Alves Lamounier
- a Graduate Programme in Health Sciences , Federal University of São João Del Rei-West Centre Campus , Divinópolis , Brazil
| | - Eduardo Ferriolli
- e Ribeirão Preto Medical School , University of São Paulo , Ribeirão Preto , Brazil
| | - Alexsandro Sobreira Galdino
- b Graduate Programme in Biochemistry and Molecular Biology , Federal University of São João del Rei , Divinópolis , Brazil
- c Graduate Program in Biotechnology , Federal University of São João del Rei , Divinópolis , Brazil
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25
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Singh D, Sastry N, Trivedi P. Amphiphilic copolymers and surface active ionic liquid systems in aqueous media – Surface active and aggregation characteristics. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.04.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Umapathi R, Venkatesu P. Thermo-responsive triblock copolymer phase transition behaviour in imidazolium-based ionic liquids: Role of the effect of alkyl chain length of cations. J Colloid Interface Sci 2017; 485:183-191. [DOI: 10.1016/j.jcis.2016.09.034] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/14/2016] [Accepted: 09/14/2016] [Indexed: 10/21/2022]
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27
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Pillai SA, Lee CF, Ray D, Aswal VK, Pal H, Chen LJ, Bahadur P. Microstructure of copolymeric micelles modulated by ionic liquids: investigating the role of the anion and cation. RSC Adv 2016. [DOI: 10.1039/c6ra17016a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The addition of ionic liquids significantly alters the micellization behaviour of, and has a profound effect on, the micelles of T1304.
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Affiliation(s)
- Sadafara A. Pillai
- Department of Chemistry
- Veer Narmad South Gujarat University
- Surat 395007
- India
| | - Chin-Fen Lee
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Debes Ray
- Solid State Physics Divn
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Vinod K. Aswal
- Solid State Physics Divn
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Haridas Pal
- Radiation and Photochem. Divn
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| | - Li-Jen Chen
- Department of Chemical Engineering
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Pratap Bahadur
- Department of Chemistry
- Veer Narmad South Gujarat University
- Surat 395007
- India
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28
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Thakkar K, Bharatiya B, Aswal VK, Bahadur P. Aggregation of 1-alkyl-3-methylimidazolium octylsulphate ionic liquids and their interaction with Triton X-100 micelles. RSC Adv 2016. [DOI: 10.1039/c6ra14664c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Halogen-free surface active and biamphiphilic ionic liquids 1-alkyl-3-methylimidazolium octylsulphates (Cnmim C8SO4, n = 4, 6, 8, 10) were synthesized and their aqueous solution behaviour was studied using NMR and scattering techniques.
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Affiliation(s)
- Khushbu Thakkar
- Department of Chemistry
- Veer Narmad South Gujarat University
- Surat-395007
- India
| | - Bhavesh Bharatiya
- Shah-Schulman Center for Surface Science & Nanotechnology
- Dharmsinh Desai University
- Nadiad-387001
- India
| | - Vinod K. Aswal
- Solid State Physics Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Pratap Bahadur
- Department of Chemistry
- Veer Narmad South Gujarat University
- Surat-395007
- India
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29
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Thakkar K, Patel V, Ray D, Pal H, Aswal VK, Bahadur P. Interaction of imidazolium based ionic liquids with Triton X-100 micelles: investigating the role of the counter ion and chain length. RSC Adv 2016. [DOI: 10.1039/c6ra03086f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Size and shape of Triton X-100 micelles can easily be controlled by the appropriate selection of ionic liquids with varying hydrophobicity.
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Affiliation(s)
- Khushbu Thakkar
- Department of Chemistry
- Veer Narmad South Gujarat University
- Surat-395007
- India
| | - Vijay Patel
- Department of Chemistry
- Vidhyadeep Institute of Science
- Surat-394110
- India
| | - Debes Ray
- Solid State Physics Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Haridas Pal
- Radiation and Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Vinod K. Aswal
- Solid State Physics Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Pratap Bahadur
- Department of Chemistry
- Veer Narmad South Gujarat University
- Surat-395007
- India
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30
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Barry NPE, Pitto-Barry A, Romero-Canelón I, Tran J, Soldevila-Barreda JJ, Hands-Portman I, Smith CJ, Kirby N, Dove AP, O'Reilly RK, Sadler PJ. Precious metal carborane polymer nanoparticles: characterisation of micellar formulations and anticancer activity. Faraday Discuss 2015; 175:229-40. [PMID: 25270092 DOI: 10.1039/c4fd00098f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the encapsulation of highly hydrophobic 16-electron organometallic ruthenium and osmium carborane complexes [Ru/Os(p-cymene)(1,2-dicarba-closo-dodecarborane-1,2-dithiolate)] ( and ) in Pluronic® triblock copolymer P123 core-shell micelles. The spherical nanoparticles and , dispersed in water, were characterized by dynamic light scattering (DLS), cryogenic transmission electron microscopy (cryo-TEM), and synchrotron small-angle X-ray scattering (SAXS; diameter ca. 15 and 19 nm, respectively). Complexes and were highly active towards A2780 human ovarian cancer cells (IC(50) 0.17 and 2.50 μM, respectively) and the encapsulated complexes, as and nanoparticles, were less potent (IC(50) 6.69 μM and 117.5 μM, respectively), but more selective towards cancer cells compared to normal cells.
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Affiliation(s)
- Nicolas P E Barry
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK.
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31
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Vekariya RL, Aswal VK, Hassan PA, Soni SS. Influence of N-alkylpyridinium halide based ionic liquids on micellization of P123 in aqueous solutions: a SANS, DLS, and NMR study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:14406-14415. [PMID: 25380316 DOI: 10.1021/la502902n] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The isotropic micellar state of Pluronic P123 in the presence and absence of N-alkylpyridinium halide ionic liquids (ILs) is investigated using SANS, DLS, and (1)H NMR studies. The micellar structural parameters are obtained as a function of variation in alkyl chain length, anions, and concentrations of ILs by fitting the SANS scattering data with a model composed of core-shell form factor and a hard sphere structure factor of interaction. Addition of ILs decreases the micellar core, aggregation number, and hard sphere radius of P123 micelles. From quantitative analysis, we determined the amount of solvent (D2O + IL) present inside the core and the core-shell interface along with cationic head groups. This is further supported by monitoring interaction between ILs and polymer micelle using (1)H NMR spectroscopy. The results are discussed and explained as a function of concentration of C8PyCl, alkyl chain length, and anions of N-alkylpyridinium halides.
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Affiliation(s)
- Rohit L Vekariya
- Department of Chemistry, Sardar Patel University , Vallabh Vidyanagar 388120, Gujarat, India
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32
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Vekariya RL, Ray D, Aswal VK, Hassan PA, Soni SS. Effect of ionic liquids on microstructures of micellar aggregates formed by PEO–PPO–PEO block copolymer in aqueous solution. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.08.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Investigation on the interactions between hydrophobic anions of ionic liquids and Triton X-114 micelles in aqueous solutions. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.05.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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34
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Barry NPE, Pitto-Barry A, Sanchez AM, Dove AP, Procter RJ, Soldevila-Barreda JJ, Kirby N, Hands-Portman I, Smith CJ, O'Reilly RK, Beanland R, Sadler PJ. Fabrication of crystals from single metal atoms. Nat Commun 2014; 5:3851. [PMID: 24861089 PMCID: PMC4050283 DOI: 10.1038/ncomms4851] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2013] [Accepted: 04/10/2014] [Indexed: 11/16/2022] Open
Abstract
Metal nanocrystals offer new concepts for the design of nanodevices with a range of potential applications. Currently the formation of metal nanocrystals cannot be controlled at the level of individual atoms. Here we describe a new general method for the fabrication of multi-heteroatom-doped graphitic matrices decorated with very small, ångström-sized, three-dimensional (3D)-metal crystals of defined size. We irradiate boron-rich precious-metal-encapsulated self-spreading polymer micelles with electrons and produce, in real time, a doped graphitic support on which individual osmium atoms hop and migrate to form 3D-nanocrystals, as small as 15 Å in diameter, within 1 h. Crystal growth can be observed, quantified and controlled in real time. We also synthesize the first examples of mixed ruthenium–osmium 3D-nanocrystals. This technology not only allows the production of ångström-sized homo- and hetero-crystals, but also provides new experimental insight into the dynamics of nanocrystals and pathways for their assembly from single atoms. Metal nanocrystals are used in an ever growing list of applications, but precise control and understanding of their formation can be difficult. Here, the authors show a route that allows the controlled formation of metal nanocrystals to be carried out and observed at an atom-by-atom level.
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Affiliation(s)
- Nicolas P E Barry
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Anaïs Pitto-Barry
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Ana M Sanchez
- Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Andrew P Dove
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Richard J Procter
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | | | - Nigel Kirby
- Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Ian Hands-Portman
- School of Life Sciences, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Corinne J Smith
- School of Life Sciences, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Rachel K O'Reilly
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Richard Beanland
- Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
| | - Peter J Sadler
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
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35
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A green strategy for lithium isotopes separation by using mesoporous silica materials doped with ionic liquids and benzo-15-crown-5. J Radioanal Nucl Chem 2014. [DOI: 10.1007/s10967-014-3052-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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36
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Li H, Imai Y, Takiue T, Matsubara H, Aratono M. Effect and mixing of counter anions at the surface of aqueous solution of imidazolium-based ionic liquids. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.02.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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