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Fernandes LC, Correia DM, Tariq M, Esperança JMSS, Martins P, Lanceros-Méndez S. Multifunctional Magnetoelectric Sensing and Bending Actuator Response of Polymer-Based Hybrid Materials with Magnetic Ionic Liquids. Nanomaterials (Basel) 2023; 13:2186. [PMID: 37570504 PMCID: PMC10420811 DOI: 10.3390/nano13152186] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/25/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023]
Abstract
With the evolution of the digital society, the demand for miniaturized multifunctional devices has been increasing, particularly for sensors and actuators. These technological translators allow successful interaction between the physical and digital worlds. In particular, the development of smart materials with magnetoelectric (ME) properties, capable of wirelessly generating electrical signals in response to external magnetic fields, represents a suitable approach for the development of magnetic field sensors and actuators due to their ME coupling, flexibility, robustness and easy fabrication, compatible with additive manufacturing technologies. This work demonstrates the suitability of magnetoelectric (ME) responsive materials based on the magnetic ionic liquid (MIL) 1-butyl-3-methylimidazolium tetrachloroferrate ([Bmim][FeCl4]) and the polymer poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE) for magnetic sensing and actuation device development. The developed sensor works in the AC magnetic field and has frequency-dependent sensitivity. The materials show voltage responses in the mV range, suitable for the development of magnetic field sensors with a highest sensitivity (s) of 76 mV·Oe-1. The high ME response (maximum ME voltage coefficient of 15 V·cm-1·Oe-1) and magnetic bending actuation (2.1 mm) capability are explained by the magnetoionic (MI) interaction and the morphology of the composites.
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Affiliation(s)
- Liliana C. Fernandes
- Physics Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal; (L.C.F.); (P.M.)
- Laboratory of Physics for Materials and Emergent Technologies, LapMET, Universidade do Minho, 4710-057 Braga, Portugal
| | | | - Mohammad Tariq
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; (M.T.); (J.M.S.S.E.)
| | - José M. S. S. Esperança
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal; (M.T.); (J.M.S.S.E.)
| | - Pedro Martins
- Physics Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal; (L.C.F.); (P.M.)
- Laboratory of Physics for Materials and Emergent Technologies, LapMET, Universidade do Minho, 4710-057 Braga, Portugal
- IB-S Institute of Science and Innovation for Sustainability, Universidade do Minho, 4710-057 Braga, Portugal
| | - Senentxu Lanceros-Méndez
- Physics Centre of Minho and Porto Universities (CF-UM-UP), Universidade do Minho, 4710-057 Braga, Portugal; (L.C.F.); (P.M.)
- Laboratory of Physics for Materials and Emergent Technologies, LapMET, Universidade do Minho, 4710-057 Braga, Portugal
- BCMaterials, Basque Centre for Materials and Applications, UPV/EHU Science Park, 48940 Leioa, Spain
- IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain
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Soromenho MRC, Afonso CAM, Esperança JMSS. Diarylethene-Based Ionic Liquids: Synthesis and Photo-Driven Solution Properties. Int J Mol Sci 2023; 24:3533. [PMID: 36834945 PMCID: PMC9960670 DOI: 10.3390/ijms24043533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
In this work, the design and synthesis of a series of photochromic gemini diarylethene-based ionic liquids (GDILs) with different cationic motifs is reported. Several synthetic pathways were optimized for the formation of cationic GDILs with chloride as the counterion. The different cationic motifs were achieved through the N-alkylation of the photochromic organic core unit with different tertiary amines, including different aromatic amines such as imidazole derivatives and pyridinium, and other non-aromatic amines. These novel salts present surprising water solubility with unexplored photochromic features that broaden their known applications. The covalent attachment of the different side groups dictates their water solubility and differences upon photocyclization. The physicochemical properties of GDILs in aqueous and in imidazolium-based ionic liquid (IL) solutions were investigated. Upon irradiation with ultraviolet (UV) light, we have observed changes in the physico-chemical properties of distinct solutions containing these GDILs, at very low concentrations. More specifically, in aqueous solution, the overall conductivity increased with the time of UV photoirradiation. In contrast, in IL solution, these photoinducible changes are dependent on the type of ionic liquid used. These compounds can improve non-ionic and ionic liquids' solutions since we can change their properties, such as conductivity, viscosity or ionicity, only by UV photoirradiation. The electronic and conformational changes associated with these innovative stimuli GDILs may open new opportunities for their use as photoswitchable materials.
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Affiliation(s)
- Mário R. C. Soromenho
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Carlos A. M. Afonso
- Research Institute for Medicine (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - José M. S. S. Esperança
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
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Carrera GVSM, Cruz ML, Klimenko K, Esperança JMSS, Aires-de-Sousa J. Prediction of the Phase Composition Profile of Three-Compound Mixtures in Liquid-Liquid Equilibrium: A Chemoinformatics Approach. Chemphyschem 2022; 23:e202200300. [PMID: 35929613 DOI: 10.1002/cphc.202200300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 08/04/2022] [Indexed: 01/04/2023]
Abstract
Machine-learning models were developed to predict the composition profile of a three-compound mixture in liquid-liquid equilibrium (LLE), given the global composition at certain temperature and pressure. A chemoinformatics approach was explored, based on the MOLMAP technology to encode molecules and mixtures. The chemical systems involved an ionic liquid (IL) and two organic molecules. Two complementary models have been optimized for the IL-rich and IL-poor phases. The two global optimized models are highly accurate, and were validated with independent test sets, where combinations of molecule1+molecule2+IL are different from those in the training set. These results highlight the MOLMAP encoding scheme, based on atomic properties to train models that learn relationships between features of complex multi-component chemical systems and their profile of phase compositions.
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Affiliation(s)
- Gonçalo V S M Carrera
- Chemistry Department LAQV-REQUIMTE, NOVA School of Science and Technology, 2829-516, Caparica, Portugal
| | - Mariana L Cruz
- Chemistry Department LAQV-REQUIMTE, NOVA School of Science and Technology, 2829-516, Caparica, Portugal
| | - Kyrylo Klimenko
- Chemistry Department LAQV-REQUIMTE, NOVA School of Science and Technology, 2829-516, Caparica, Portugal
| | - José M S S Esperança
- Chemistry Department LAQV-REQUIMTE, NOVA School of Science and Technology, 2829-516, Caparica, Portugal
| | - João Aires-de-Sousa
- Chemistry Department LAQV-REQUIMTE, NOVA School of Science and Technology, 2829-516, Caparica, Portugal
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Klimenko K, Inês JM, Esperança JMSS, Aires-de-Sousa J, Carrera GVSM. SelinfDB: A Database of Selectivity at Infinite Dilution for Liquid–Liquid Extraction. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00326] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Kyrylo Klimenko
- LAQV/REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - João Miguel Inês
- LAQV/REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - José M. S. S. Esperança
- LAQV/REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - João Aires-de-Sousa
- LAQV/REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Gonçalo V. S. M. Carrera
- LAQV/REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
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Agostinho DAS, Jesus AR, Silva ABP, Esperança JMSS, Paiva A, Duarte ARC, Reis PM. Improvement of New Dianionic Ionic Liquids vs Monoanionic in Solubility of Poorly Water-Soluble Drugs. J Pharm Sci 2021; 110:2489-2500. [PMID: 33484731 DOI: 10.1016/j.xphs.2021.01.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/12/2021] [Indexed: 10/22/2022]
Abstract
New ionic liquids (ILs) based on dianionic phosphonate anions and ammonium cations were prepared and characterized. They were used as excipients to increase the water solubility of two oral drugs, piroxicam and ibuprofen, that are slightly soluble in water. An increment in solubility of 300-fold was achieved for ibuprofen when compared with pure water, with only 0.25 mol% of IL in water. Interestingly, this was achieved with the less toxic dianionic ionic liquid [N4 1 2OH 2OH]2 [C2H5PO3], which presents an IC50 of 120 mM (≈0.25 mol%). On the other hand, piroxicam showed an increase of 480-fold for the same dianionic ionic liquid, with the same ionic liquid percentage. In contrast, for monoanionic ionic liquids, the effect was not so pronounced, and only a 10-fold was obtained, in the presence of 0.3 mol% of IL. The lipophilicity (logP) of drugs decreased in the presence of these ILs. Cytotoxicity profile of these ILs was determined and they did not show a significant impact towards healthy fibroblasts. The cytotoxicity of ibuprofen and piroxicam was also determined, and cellular viability almost did not change when ionic liquid was in the presence of 1 mM of oral drug.
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Affiliation(s)
- Daniela A S Agostinho
- LAQV, Requimte, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
| | - Ana R Jesus
- LAQV, Requimte, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
| | - Ana B P Silva
- LAQV, Requimte, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
| | - José M S S Esperança
- LAQV, Requimte, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
| | - Alexandre Paiva
- LAQV, Requimte, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal
| | - Ana R C Duarte
- LAQV, Requimte, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal.
| | - Patrícia M Reis
- LAQV, Requimte, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, 2829-516, Portugal.
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Paramasivam K, Fialho CB, Cruz TFC, Rodrigues AI, Ferreira B, Gomes CSB, Vila-Viçosa D, Charas A, Esperança JMSS, Vieira Ferreira LF, Calhorda MJ, Maçanita AL, Morgado J, Gomes PT. New luminescent tetracoordinate boron complexes: an in-depth experimental and theoretical characterisation and their application in OLEDs. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00403d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
New luminescent 2-iminopyrrolyl boron complexes with different BX2 moieties are extensively studied via complementary experimental and theoretical methodologies, including application in OLEDs.
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Affiliation(s)
- Krishnamoorthy Paramasivam
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Centre for Environmental Research, Department of Chemistry, Kongu Engineering College, Perundurai, Erode 638 060, India
| | - Carina B. Fialho
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Tiago F. C. Cruz
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Ana I. Rodrigues
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Bruno Ferreira
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Clara S. B. Gomes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- UCIBIO-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Diogo Vila-Viçosa
- BioISI - Biosystems & Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
| | - Ana Charas
- Instituto de Telecomunicações, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - José M. S. S. Esperança
- LAQV-REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Luís F. Vieira Ferreira
- BSIRG – Biospectroscopy and Interfaces Research Group, IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Maria José Calhorda
- BioISI - Biosystems & Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, 1749-016 Lisboa, Portugal
| | - António L. Maçanita
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Jorge Morgado
- Instituto de Telecomunicações, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Pedro T. Gomes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
- Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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Ferreira TJ, Vera AT, de Moura BA, Esteves LM, Tariq M, Esperança JMSS, Esteves IAAC. Paramagnetic Ionic Liquid/Metal Organic Framework Composites for CO 2/CH 4 and CO 2/N 2 Separations. Front Chem 2020; 8:590191. [PMID: 33304882 PMCID: PMC7701274 DOI: 10.3389/fchem.2020.590191] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/20/2020] [Indexed: 12/05/2022] Open
Abstract
Global warming is arguably the biggest scientific challenge of the twenty-first century and its environmental consequences are already noticeable. To mitigate the emissions of greenhouse gases, particularly of CO2, there is an urgent need to design materials with improved adsorbent properties. Five different magnetic ionic liquids were impregnated into the metal–organic framework ZIF-8. The composites were produced by a direct-contact method, and their performance as sorbents for gas separation applications was studied. The impact of the ionic liquid anion on the sorption capacity and ideal CO2/CH4 and CO2/N2 selectivities were studied, focusing on understanding the influence of metal atom and ligand on the adsorbent properties. Reproducible methodology, along with rigorous characterization, were established to assess the impact of the ionic liquid on the performance of the composite materials. Results show that the ionic liquid was well-impregnated, and the ZIF-8 structure was maintained after ionic liquid impregnation. The produced composites were of microporous nature and were thermally stable. CO2, CH4, and N2 adsorption–desorption isotherms were obtained at 303 K and between 0 and 16 bar. The adsorption-desorption data of the composites were compared with that obtained for original ZIF-8. The general trend in composites is that the increased gas uptake per available pore volume compensates the pore volume loss. Adsorption data per unit mass showed that composites have reversible sorption, but inferior gas uptake at all pressure ranges. This is due to the observed total pore volume loss by the ionic liquid pore occupation/blockage. In most cases, composites showed superior selectivity performance at all pressure range. In particular, the composite [C4MIM]2[MnCl4]@ZIF-8 shows a different low-pressure selectivity trend from the original MOF, with a 33% increase in the CO2/N2 selectivity at 1 bar and 19% increase in the CO2/CH4 selectivity at 10 bar. This material shows potential for use in a post-combustion CO2 capture application that can contribute to greenhouse gas mitigation.
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Affiliation(s)
- Tiago J Ferreira
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa (FCT NOVA), Costa da Caparica, Portugal
| | - Ana T Vera
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa (FCT NOVA), Costa da Caparica, Portugal
| | - Beatriz A de Moura
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa (FCT NOVA), Costa da Caparica, Portugal
| | - Laura M Esteves
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa (FCT NOVA), Costa da Caparica, Portugal
| | - Mohammad Tariq
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa (FCT NOVA), Costa da Caparica, Portugal
| | - José M S S Esperança
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa (FCT NOVA), Costa da Caparica, Portugal
| | - Isabel A A C Esteves
- Laboratório Associado para a Química Verde/Rede de Química e Tecnologia (LAQV/REQUIMTE), Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa (FCT NOVA), Costa da Caparica, Portugal
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Fernandes LC, Correia DM, Fernández E, Tariq M, Esperança JMSS, Lanceros-Méndez S. Design of Ionic-Liquid-Based Hybrid Polymer Materials with a Magnetoactive and Electroactive Multifunctional Response. ACS Appl Mater Interfaces 2020; 12:42089-42098. [PMID: 32806893 DOI: 10.1021/acsami.0c10746] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Multifunctional materials with sensor and actuator capabilities play an increasing role in modern technology. In this scope, hybrid materials with magnetic sensing and an electromechanical actuator response based on magnetic ionic liquids (MILs) and the polymer poly(vinylidene fluoride) (PVDF) have been developed. MILs comprising different cation alkyl chain lengths [Cnmim]+ and sharing the same anion [FeCl4]- were incorporated at 20 wt % into the PVDF matrix and the morphological, physical, chemical, and functional properties of the materials were evaluated. An increasing IL alkyl chain length leads to the formation of a porous structure, together with an increase in the electroactive PVDF β-phase content of the polymer and a decrease in the crystallinity degree and thermal stability. The magnetic susceptibility of the [Cnmim][FeCl4]/PVDF films reveals a paramagnetic behavior. The multifunctional response is characterized by a magnetoionic response that decreases with increasing IL alkyl chain length, the highest magnetoionic coefficient (1.06 ± 0.015 V cm-1 Oe-1) being observed for [C2mim][FeCl4]/PVDF. The electromechanical actuator response is characterized by a highest displacement of 1.1 mm for the [C4mim][FeCl4]/PVDF film by applying a voltage of 4 V at a frequency of 100 mHz. Further, their solution processing makes these multiresponsive materials compatible with additive manufacturing technologies.
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Affiliation(s)
- Liliana C Fernandes
- Centre of Physics, University of Minho, 4710-057 Braga, Portugal
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - Daniela M Correia
- Centre of Physics, University of Minho, 4710-057 Braga, Portugal
- Centre of Chemistry, University of Trás-os-Montes e Alto Douro, 5000-801 Vila Real, Portugal
| | - Eduardo Fernández
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - Mohammad Tariq
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - José M S S Esperança
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Senentxu Lanceros-Méndez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
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Neves CMSS, Figueiredo M, Reis PM, Sousa ACA, Cristóvão AC, Fiadeiro MB, Rebelo LPN, Coutinho JAP, Esperança JMSS, Freire MG. Simultaneous Separation of Antioxidants and Carbohydrates From Food Wastes Using Aqueous Biphasic Systems Formed by Cholinium-Derived Ionic Liquids. Front Chem 2019; 7:459. [PMID: 31316969 PMCID: PMC6610481 DOI: 10.3389/fchem.2019.00459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 06/11/2019] [Indexed: 01/12/2023] Open
Abstract
The food industry produces significant amounts of waste, many of them rich in valuable compounds that could be recovered and reused in the framework of circular economy. The development of sustainable and cost-effective technologies to recover these value added compounds will contribute to a significant decrease of the environmental footprint and economic burden of this industry sector. Accordingly, in this work, aqueous biphasic systems (ABS) composed of cholinium-derived bistriflimide ionic liquids (ILs) and carbohydrates were investigated as an alternative process to simultaneously separate and recover antioxidants and carbohydrates from food waste. Aiming at improving the biocompatible character of the studied ILs and proposed process, cholinium-derived bistriflimide ILs were chosen, which were properly designed by playing with the cation alkyl side chain and the number of functional groups attached to the cation to be able to create ABS with carbohydrates. These ILs were characterized by cytotoxicity assays toward human intestinal epithelial cells (Caco-2 cell line), demonstrating to have a significantly lower toxicity than other well-known and commonly used fluorinated ILs. The capability of these ILs to form ABS with a series of carbohydrates, namely monosaccharides, disaccharides and polyols, was then appraised by the determination of the respective ternary liquid-liquid phase diagrams at 25°C. The studied ABS were finally used to separate carbohydrates and antioxidants from real food waste samples, using an expired vanilla pudding as an example. With the studied systems, the separation of the two products occurs in one-step, where carbohydrates are enriched in the carbohydrate-rich phase and antioxidants are mainly present in the IL-rich phase. Extraction efficiencies of carbohydrates ranging between 89 and 92% to the carbohydrate-rich phase, and antioxidant relative activities ranging between 65 and 75% in the IL-rich phase were obtained. Furthermore, antioxidants from the IL-rich phase were recovered by solid-phase extraction, and the IL was recycled for two more times with no losses on the ABS separation performance. Overall, the obtained results show that the investigated ABS are promising platforms to simultaneously separate carbohydrates and antioxidants from real food waste samples, and could be used in further related applications foreseeing industrial food waste valorization.
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Affiliation(s)
- Catarina M S S Neves
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Marcos Figueiredo
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | | | - Ana C A Sousa
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Ana C Cristóvão
- CICS-UBI - Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | - Mariana B Fiadeiro
- CICS-UBI - Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal
| | | | - João A P Coutinho
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | | | - Mara G Freire
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
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10
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Esperança JMSS, Tariq M, Pereiro AB, Araújo JMM, Seddon KR, Rebelo LPN. Anomalous and Not-So-Common Behavior in Common Ionic Liquids and Ionic Liquid-Containing Systems. Front Chem 2019; 7:450. [PMID: 31281812 PMCID: PMC6596442 DOI: 10.3389/fchem.2019.00450] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 06/05/2019] [Indexed: 11/27/2022] Open
Abstract
This work highlights unexpected, not so well known responses of ionic liquids and ionic liquid-containing systems, which are reported in a collective manner, as a short review. Examples include: (i) Minima in the temperature dependence of the isobaric thermal expansion coefficient of some ILs; (ii) Viscosity Minima in binary mixtures of IL + Molecular solvents; (iii) Anomalies in the surface tension within a family of ILs; (iv) The constancy among IL substitution of Cp/Vm at and around room temperature; (v) ILs as glass forming liquids; (vi) Alternate odd-even side alkyl chain length effects; (vii) Absolute negative pressures in ILs and IL-containing systems; (viii) Reversed-charged ionic liquid pairs; (ix) LCST immiscibility behavior in IL + solvent systems.
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Affiliation(s)
- José M S S Esperança
- LAQV/REQUIMTE, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Caparica, Portugal
| | - Mohammad Tariq
- LAQV/REQUIMTE, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Caparica, Portugal
| | - Ana B Pereiro
- LAQV/REQUIMTE, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Caparica, Portugal
| | - João M M Araújo
- LAQV/REQUIMTE, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Caparica, Portugal
| | - Kenneth R Seddon
- QUILL Research Centre, the Queen's University of Belfast, Belfast, United Kingdom
| | - Luis Paulo N Rebelo
- LAQV/REQUIMTE, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, Caparica, Portugal
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11
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Fernandes LC, Correia DM, García-Astrain C, Pereira N, Tariq M, Esperança JMSS, Lanceros-Méndez S. Ionic-Liquid-Based Printable Materials for Thermochromic and Thermoresistive Applications. ACS Appl Mater Interfaces 2019; 11:20316-20324. [PMID: 31074605 DOI: 10.1021/acsami.9b00645] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Smart materials exhibiting thermochromic and themoresistive properties based on the electroactive polymer poly(vinylidene fluoride) (PVDF) and the ionic liquid (IL) bis(1-butyl-3-methylimidazolium) tetrachloronickelate ([Bmim]2[NiCl4]) have been developed with different contents of [Bmim]2[NiCl4] (10, 20, and 40 wt %) within the polymer matrix. The morphology of the composites is studied, and the thermochromic and thermoresistive properties are evaluated. Independently of the IL content, the PVDF/[Bmim]2[NiCl4] composites present a porous morphology and thermochromic response, revealed by the color change of the composites from transparent to dark blue, attributed to the tetrahedral complex NiCl42- formed after a dehydration process. Further, the electrical conductivity increases with increasing IL content and decreases with increasing temperature. It is also shown that the incorporation of the IL into the PVDF matrix leads to an increase in the electroactive β phase and a decrease in the degree of crystallinity and thermal stability with increasing [Bmim]2[NiCl4] content. The printability and applicability of the developed materials as sensors are also demonstrated.
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Affiliation(s)
- Liliana C Fernandes
- BCMaterials, Basque Center for Materials , Applications and Nanostructures , UPV/EHU Science Park , 48940 Leioa , Spain
| | - Daniela M Correia
- Departamento de Química e CQ-VR , Universidade de Trás-os-Montes e Alto Douro , 5001-801 Vila Real , Portugal
- Centro de Física, Campus de Gualtar , Universidade do Minho , 4710-057 Braga , Portugal
| | - Clara García-Astrain
- BCMaterials, Basque Center for Materials , Applications and Nanostructures , UPV/EHU Science Park , 48940 Leioa , Spain
| | - Nelson Pereira
- Centro de Física, Campus de Gualtar , Universidade do Minho , 4710-057 Braga , Portugal
| | - Mohammad Tariq
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia , Universidade Nova de Lisboa , 2829-516 Caparica , Portugal
| | - José M S S Esperança
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia , Universidade Nova de Lisboa , 2829-516 Caparica , Portugal
| | - Senentxu Lanceros-Méndez
- BCMaterials, Basque Center for Materials , Applications and Nanostructures , UPV/EHU Science Park , 48940 Leioa , Spain
- Ikerbasque, Basque Foundation for Science , 48013 Bilbao , Spain
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12
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Correia DM, Martins P, Tariq M, Esperança JMSS, Lanceros-Méndez S. Low-field giant magneto-ionic response in polymer-based nanocomposites. Nanoscale 2018; 10:15747-15754. [PMID: 30094455 DOI: 10.1039/c8nr03259a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The future of magnetoelectric (ME) materials is closely linked to the optimization of the ME response on nanocomposites or to the introduction of new effects to achieve higher ME performance from low magnetic fields. Here, we report a P(VDF-TrFE)/[C4mim][FeCl4] nanocomposite with a magneto-ionic response that produces giant magnetoelectric coefficients up to ≈10 V cm-1 Oe-1. This response comprises a magnetically triggered ionic/charge movement within the porous structure of the polymer, being this a novel phenomenon never experimentally observed or explored in magnetoelectric composites. This work successfully demonstrates the concept of exploring magnetic ionic liquids, such as [C4mim][FeCl4], in polymer-based magnetoelectric nanocomposites, suitable for low-field magnetic sensing devices. Such nanocomposites have remarkable potential for applications, not only because they exhibit a high ME response with scalable production and with good reproducibility but also because this coupling between magnetic order and electric order via ionic effects can lead to additional novel effects.
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Affiliation(s)
- Daniela M Correia
- Departamento de Química e CQ-VR, Universidade de Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
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13
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Belchior DCV, Sintra TE, Carvalho PJ, Soromenho MRC, Esperança JMSS, Ventura SPM, Rogers RD, Coutinho JAP, Freire MG. Odd-even effect on the formation of aqueous biphasic systems formed by 1-alkyl-3-methylimidazolium chloride ionic liquids and salts. J Chem Phys 2018; 148. [PMID: 30283158 DOI: 10.1063/1.5012020] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This work provides a comprehensive evaluation of the effect of the cation alkyl side chain length of the 1-alkyl-3-methylimidazolium chloride series ([C n C1im]Cl, n = 2-14) of ionic liquids (ILs) on their capability to form aqueous biphasic systems (ABSs) with salts and self-aggregation derived properties. The liquid-liquid phase behavior of ternary systems composed of [C n C1im]Cl, water, and K3PO4 or K2CO3 and the respective Setschenow salting-out coefficients (ks ), a quantitative measure of the two-phase formation ability, were determined. An odd-even effect in the ks values along the number of methylene groups of the longest IL cation alkyl side chain was identified for the ABS formed by K2CO3, a weaker salting-out agent where the phenomenon is clearly identified. In general, cations with even alkyl side chains, being likely to display higher molar volumes, are more easily salted-out and thus more prone to undergo phase separation. The odd-even effect in the ks values is, however, more significant in ILs up to n = 6, where the nanostructuration/nanosegregation of ILs plays a less relevant role. Still, with the [C n C1im]Cl (n = 7-14) series of ILs, an odd-even effect was also identified in the ILs' ionization degree, molar conductivity, and conductivity at infinite dilution. In summary, it is shown here that the ILs' odd-even effect occurs in IL aqueous solutions and not just in neat ILs, an already well-established phenomenon occurring in a series of ILs' properties described as a result of the orientation of the terminal methyl groups to the imidazolium ring cation and consequent effect in the ILs' cohesive energy.
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Affiliation(s)
- Diana C V Belchior
- CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Tânia E Sintra
- CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Pedro J Carvalho
- CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mário R C Soromenho
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - José M S S Esperança
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - Sónia P M Ventura
- CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Robin D Rogers
- 525 Solutions, Inc., P.O. Box 2206, Tuscaloosa, Alabama 35403, USA.,Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, USA
| | - João A P Coutinho
- CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mara G Freire
- CICECO-Aveiro Institute of Materials, Chemistry Department, University of Aveiro, 3810-193 Aveiro, Portugal
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14
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Abstract
This review highlights the pyridinium salts in terms of their natural occurrence, synthesis, reactivity, biological properties, and diverse applications.
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Affiliation(s)
- Subbiah Sowmiah
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- Research Institute for Medicines (iMed.ULisboa)
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- LAQV-REQUIMTE
| | - Luís P. N. Rebelo
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
- LAQV-REQUIMTE
| | - Carlos A. M. Afonso
- Research Institute for Medicines (iMed.ULisboa)
- Faculty of Pharmacy
- Universidade de Lisboa
- 1649-009 Lisboa
- Portugal
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15
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Ruivo D, Canongia Lopes JN, Deive FJ, Esperança JMSS, Rebelo LPN, Rodriguez A, Shimizu K. Molecular dynamics studies on the structure and interactions of ionic liquids containing amino-acid anions. Phys Chem Chem Phys 2018; 20:23864-23872. [DOI: 10.1039/c8cp03831g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Several molecular dynamics (MD) simulations have been performed in order to obtain structural information on ionic liquids (ILs) based on amino-acid anions.
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Affiliation(s)
- Diana Ruivo
- LAQV
- REQUIMTE
- Departamento de Química
- Faculdade de Ciências e Tecnologia
- Universidade Nova de Lisboa
| | - José N. Canongia Lopes
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | | | - José M. S. S. Esperança
- LAQV
- REQUIMTE
- Departamento de Química
- Faculdade de Ciências e Tecnologia
- Universidade Nova de Lisboa
| | - Luís Paulo N. Rebelo
- LAQV
- REQUIMTE
- Departamento de Química
- Faculdade de Ciências e Tecnologia
- Universidade Nova de Lisboa
| | - Ana Rodriguez
- Department of Chemical Engineering
- University of Vigo
- 36310 Vigo
- Spain
| | - Karina Shimizu
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
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16
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Cruz TFC, Shimizu K, Esperança JMSS, Rebelo LPN, Gomes PT, Canongia Lopes JN. ILs through the looking glass: electrostatics and structure probed using charge-inverted ionic liquid pairs. Faraday Discuss 2017; 206:203-218. [PMID: 28930331 DOI: 10.1039/c7fd00139h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Ionic liquids combining potassium cations with 1-alkyl-3-methylcyclopentadienyl anions, K[CnC1Cp] (n = 4, 6) have been synthesized. Differential scanning calorimetry measurements have shown that K[C4C1Cp] and K[C6C1Cp] melt without decomposition at around 90 °C. These two ionic liquids are the charge-inverted counterparts of [C4C1Im]Cl and [C6C1Im]Cl, two common ionic liquids. The concept of charge-inverted ionic pairs is used to explore the nature of the interactions and structure in different ionic compounds, from simple alkali halide salts to ionic liquids based on complex molecular ions. Different sets of experimental data, empirical correlations and molecular dynamics simulations are used to that effect.
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Affiliation(s)
- Tiago F C Cruz
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - Karina Shimizu
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - José M S S Esperança
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, E-mail: and Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal
| | - Luís Paulo N Rebelo
- LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal, E-mail: and Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal
| | - Pedro T Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
| | - José N Canongia Lopes
- Centro de Química Estrutural, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal.
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17
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Bordes É, Costa AJL, Szala-Bilnik J, Andanson JM, Esperança JMSS, Gomes MFC, Lopes JNC, Pádua AAH. Polycyclic aromatic hydrocarbons as model solutes for carbon nanomaterials in ionic liquids. Phys Chem Chem Phys 2017; 19:27694-27703. [DOI: 10.1039/c7cp04932c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this work is to understand the details of the interactions of ionic liquids with carbon nanomaterials (graphene and nanotubes) using polyaromatic compounds as model solutes.
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Affiliation(s)
- Émilie Bordes
- Institut de Chimie de Clermont-Ferrand
- CNRS and Université Clermont Auvergne
- 63177 Aubière
- France
| | - Anabela J. L. Costa
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780 – 157 Oeiras
- Portugal
- LAQV
| | - Joanna Szala-Bilnik
- Institut de Chimie de Clermont-Ferrand
- CNRS and Université Clermont Auvergne
- 63177 Aubière
- France
| | - Jean-Michel Andanson
- Institut de Chimie de Clermont-Ferrand
- CNRS and Université Clermont Auvergne
- 63177 Aubière
- France
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica António Xavier
- Universidade Nova de Lisboa
- 2780 – 157 Oeiras
- Portugal
- LAQV
| | | | - José N. Canongia Lopes
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
- Portugal
| | - Agílio A. H. Pádua
- Institut de Chimie de Clermont-Ferrand
- CNRS and Université Clermont Auvergne
- 63177 Aubière
- France
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18
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Canongia Lopes JN, Esperança JMSS, de Ferro AM, Pereiro AB, Plechkova NV, Rebelo LPN, Seddon KR, Vázquez-Fernández I. Protonic Ammonium Nitrate Ionic Liquids and Their Mixtures: Insights into Their Thermophysical Behavior. J Phys Chem B 2016; 120:2397-406. [PMID: 26886188 DOI: 10.1021/acs.jpcb.5b11900] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study is centered on the thermophysical characterization of different families of alkylammonium nitrate ionic liquids and their binary mixtures, namely the determination at atmospheric pressure of densities, electric conductivities and viscosities in the 288.15 < T/K < 353.15 range. First, measurements focusing on ethylammonium, propylammonium and butylammonium nitrate systems, and their binary mixtures, were determined. These were followed by studies involving binary mixtures composed of ethylammonium nitrate (with three hydrogen bond donor groups) and different homologous ionic liquids with differing numbers of hydrogen bond donor groups: diethylammonium nitrate (two hydrogen bond donors), triethylammonium nitrate (one hydrogen bond donor) and tetraethylammonium nitrate (no hydrogen bond donors). Finally, the behavior of mixtures with different numbers of equivalent carbon atoms in the alkylammonium cations was analyzed. The results show a quasi-ideal behavior for all monoalkylammonium nitrate mixtures. In contrast, the other mixtures show deviations from ideality, namely when the difference in the number of carbon atoms present in the cations increases or the number of hydrogen bond donors present in the cation decreases. Overall, the results clearly show that, besides the length and distribution of alkyl chains present in a cation such as alkylammonium, there are other structural and interaction parameters that influence the thermophysical properties of both pure compounds and their mixtures.
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Affiliation(s)
- José N Canongia Lopes
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , 2780-157, Oeiras, Portugal.,Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa , Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - José M S S Esperança
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , 2780-157, Oeiras, Portugal
| | - André Mão de Ferro
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , 2780-157, Oeiras, Portugal
| | - Ana B Pereiro
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , 2780-157, Oeiras, Portugal
| | - Natalia V Plechkova
- The QUILL Research Centre, School of Chemistry and Chemical Engineering, The Queen's University of Belfast , Stranmillis Road, Belfast BT9 5AG, U.K
| | - Luis P N Rebelo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , 2780-157, Oeiras, Portugal
| | - Kenneth R Seddon
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa , 2780-157, Oeiras, Portugal.,The QUILL Research Centre, School of Chemistry and Chemical Engineering, The Queen's University of Belfast , Stranmillis Road, Belfast BT9 5AG, U.K
| | - Isabel Vázquez-Fernández
- The QUILL Research Centre, School of Chemistry and Chemical Engineering, The Queen's University of Belfast , Stranmillis Road, Belfast BT9 5AG, U.K
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19
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Sowmiah S, Veiros LF, Esperança JMSS, Rebelo LP, Afonso CAM. Organocatalyzed One-Step Synthesis of Functionalized N-Alkyl-Pyridinium Salts from Biomass Derived 5-Hydroxymethylfurfural. Org Lett 2015; 17:5244-7. [DOI: 10.1021/acs.orglett.5b02573] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Subbiah Sowmiah
- Instituto
de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
- iMed. UL, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1640-003 Lisboa, Portugal
| | - Luís F. Veiros
- Centro
de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal
| | - José M. S. S. Esperança
- Instituto
de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Luís P.N. Rebelo
- Instituto
de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Carlos A. M. Afonso
- iMed. UL, Faculdade de Farmácia da Universidade de Lisboa, Av. Prof. Gama Pinto, 1640-003 Lisboa, Portugal
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20
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Tariq M, Shimizu K, Esperança JMSS, Canongia Lopes JN, Rebelo LPN. Viscosity minima in binary mixtures of ionic liquids + molecular solvents. Phys Chem Chem Phys 2015; 17:13480-94. [PMID: 25933136 DOI: 10.1039/c5cp01563d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The viscosity (η) of four binary mixtures (ionic liquids plus molecular solvents, ILs+MSs) was measured in the 283.15 < T/K < 363.15 temperature range. Different IL/MS combinations were selected in such a way that the corresponding η(T) functions exhibit crossover temperatures at which both pure components present identical viscosity values. Consequently, most of the obtained mixture isotherms, η(x), exhibit clear viscosity minima in the studied T-x range. The results are interpreted using auxiliary molecular dynamics (MD) simulation data in order to correlate the observed η(T,x) trends with the interactions in each mixture, including the balance between electrostatic forces and hydrogen bonding.
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Affiliation(s)
- M Tariq
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
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21
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Kowacz M, Marchel M, Juknaite L, Carvalho AL, Romão MJ, Esperança JMSS, Rebelo LPN. Protein crystal nucleation induced by ionic liquid-functionalized mineral particles. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315099222] [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: 11/10/2022] Open
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22
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Deive FJ, Ruivo D, Rodrigues JV, Gomes CM, Sanromán MÁ, Rebelo LPN, Esperança JMSS, Rodríguez A. On the hunt for truly biocompatible ionic liquids for lipase-catalyzed reactions. RSC Adv 2015. [DOI: 10.1039/c4ra15021j] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One of the challenges in the field of biocatalysis is the search for efficient reaction media avoiding enzyme deactivation.
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Affiliation(s)
| | - Diana Ruivo
- Instituto de Tecnologia Química e Biológica
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
| | - João V. Rodrigues
- Instituto de Tecnologia Química e Biológica
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
| | - Cláudio M. Gomes
- Instituto de Tecnologia Química e Biológica
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
| | | | - Luís Paulo N. Rebelo
- Instituto de Tecnologia Química e Biológica
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica
- Universidade Nova de Lisboa
- 2780-157 Oeiras
- Portugal
| | - Ana Rodríguez
- Department of Chemical Engineering
- University of Vigo
- 36310 Vigo
- Spain
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Kowacz M, Esperança JMSS, Rebelo LPN. Spontaneous emulsification in ionic liquid/water systems and its use for templating of solids. Soft Matter 2014; 10:3798-3805. [PMID: 24705788 DOI: 10.1039/c4sm00213j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the spontaneous formation of nano-sized ionic liquid/water (IL/W) emulsions in a simple system solely composed of an IL and aqueous solution of an inorganic salt. The IL ions play a dual role, that of both a surfactant and the dispersed phase. No extra surfactant is needed to promote emulsification. Droplets generation at the IL/W interface is captured by nanoparticulate and porous films that imprint the morphology of this unstable interface. The emulsion droplets are employed to create core-shell microcrystals with potential functionality.
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Affiliation(s)
- Magdalena Kowacz
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal.
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Moscoso F, Deive FJ, Esperança JMSS, Rodríguez A. Pesticide removal from aqueous solutions by adding salting out agents. Int J Mol Sci 2013; 14:20954-65. [PMID: 24145747 PMCID: PMC3821652 DOI: 10.3390/ijms141020954] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 10/12/2013] [Accepted: 10/12/2013] [Indexed: 11/16/2022] Open
Abstract
Phase segregation in aqueous biphasic systems (ABS) composed of four hydrophilic ionic liquids (ILs): 1-butyl-3-methylimidazolium methylsulfate and 1-ethyl-3-methylimidazolium methylsulfate (C(n)C₁im C₁SO₄, n = 2 and 4), tributylmethyl phosphonium methylsulfate (P₄₄₄₁ C₁SO₄) and methylpyridinium methylsulfate (C₁Py C₁SO₄) and two high charge density potassium inorganic salts (K₂CO₃ and K₂HPO₄) were determined by the cloud point method at 298.15 K. The influence of the addition of the selected inorganic salts to aqueous mixtures of ILs was discussed in the light of the Hofmeister series and in terms of molar Gibbs free energy of hydration. The effect of the alkyl chain length of the cation on the methylsulfate-based ILs has been investigated. All the solubility data were satisfactorily correlated to several empirical equations. A pesticide (pentachlorophenol, PCP) extraction process based on the inorganic salt providing a greater salting out effect was tackled. The viability of the proposed process was analyzed in terms of partition coefficients and extraction efficiencies.
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Affiliation(s)
- Fátima Moscoso
- Department of Chemical Engineering, University of Vigo, 36310 Vigo, Spain; E-Mails: (F.M.); (F.J.D.)
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-756 Oeiras, Portugal; E-Mail:
| | - Francisco J. Deive
- Department of Chemical Engineering, University of Vigo, 36310 Vigo, Spain; E-Mails: (F.M.); (F.J.D.)
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-756 Oeiras, Portugal; E-Mail:
| | - Ana Rodríguez
- Department of Chemical Engineering, University of Vigo, 36310 Vigo, Spain; E-Mails: (F.M.); (F.J.D.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +34-986-812-213; Fax: +34-986-812-383
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25
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Tariq M, Esperança JMSS, Soromenho MRC, Rebelo LPN, Lopes JNC. Shifts in the temperature of maximum density (TMD) of ionic liquid aqueous solutions. Phys Chem Chem Phys 2013; 15:10960-70. [PMID: 23710486 DOI: 10.1039/c3cp50387a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This work investigates for the first time shifts in the temperature of maximum density (TMD) of water caused by ionic liquid solutes. A vast amount of high-precision volumetric data--more than 6000 equilibrated (static) high-precision density determination corresponding to ∼90 distinct ionic liquid aqueous solutions of 28 different types of ionic liquid--allowed us to analyze the TMD shifts for different homologous series or similar sets of ionic solutes and explain the overall effects in terms of hydrophobic, electrostatic and hydrogen-bonding contributions. The differences between the observed TMD shifts in the -2 < t/°C < 4 range and salting-in or salting-out effects produced by the same type of ions in aqueous solutions at higher temperatures are discussed taking into account the different types of possible solute-water interactions that can modify the structure of the aqueous phase. The results also reveal different insights concerning the nature of the ions that constitute typical ionic liquids and are consistent with previous results that established hydrophobic and hydrophilic scales for ionic liquid ions based on their specific interactions with water and other probe molecules.
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Affiliation(s)
- M Tariq
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal.
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26
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Costa AJL, Soromenho MRC, Shimizu K, Esperança JMSS, Lopes JNC, Rebelo LPN. Unusual LCST-type behaviour found in binary mixtures of choline-based ionic liquids with ethers. RSC Adv 2013. [DOI: 10.1039/c3ra40327k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Costa AJL, Soromenho MRC, Shimizu K, Marrucho IM, Esperança JMSS, Lopes JNC, Rebelo LPN. Liquid–Liquid Equilibrium of Cholinium-Derived Bistriflimide Ionic Liquids with Water and Octanol. J Phys Chem B 2012; 116:9186-95. [DOI: 10.1021/jp3053168] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Anabela J. L. Costa
- Instituto de Tecnologia Química
e Biológica, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal
| | - Mário R. C. Soromenho
- Instituto de Tecnologia Química
e Biológica, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal
| | - Karina Shimizu
- Instituto de Tecnologia Química
e Biológica, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal
- Centro de Química Estrutural, Instituto Superior Técnico, 1049-001 Lisboa,
Portugal
| | - Isabel M. Marrucho
- Instituto de Tecnologia Química
e Biológica, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química
e Biológica, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal
| | - J. N. Canongia Lopes
- Instituto de Tecnologia Química
e Biológica, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal
- Centro de Química Estrutural, Instituto Superior Técnico, 1049-001 Lisboa,
Portugal
| | - Luís Paulo N. Rebelo
- Instituto de Tecnologia Química
e Biológica, Universidade Nova de Lisboa, Av. República, 2780-157 Oeiras, Portugal
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28
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Dias AMA, Marceneiro S, Braga MEM, Coelho JFJ, Ferreira AGM, Simões PN, Veiga HIM, Tomé LC, Marrucho IM, Esperança JMSS, Matias AA, Duarte CMM, Rebelo LPN, de Sousa HC. Phosphonium-based ionic liquids as modifiers for biomedical grade poly(vinyl chloride). Acta Biomater 2012; 8:1366-79. [PMID: 22085860 DOI: 10.1016/j.actbio.2011.10.034] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 09/26/2011] [Accepted: 10/28/2011] [Indexed: 11/16/2022]
Abstract
This work reports and discusses the influence of four phosphonium-based ionic liquids (PhILs), namely trihexyl(tetradecyl) phosphonium dicyanamide, [P(6,6,6,14)][dca]; trihexyl(tetradecyl) phosphonium bis(trifluoromethylsulfonyl)imide, [P(6,6,6,14)][Tf(2)N]; tetrabutyl phosphonium bromide, [P(4,4,4,4)][Br]; and tetrabutyl phosphonium chloride, [P(4,4,4,4)][Cl], on some of the chemical, physical and biological properties of a biomedical-grade suspension of poly(vinyl chloride) (PVC). The main goal of this work was to evaluate the capacity of these PhILs to modify some of the properties of neat PVC, in particular those that may allow their use as potential alternatives to traditional phthalate-based plasticizers in PVC biomedical applications. PVC films having different PhIL compositions (0, 5, 10 and 20 wt.%) were prepared (by solvent film casting) and characterised by Fourier transform infrared, thermogravimetric analysis, differential scanning calorimetry, dynamical mechanical thermal analysis, scanning electron microscopy/energy-dispersive X-ray/electron probe microanalysis, X-ray diffraction, transmittance, permeability towards oxygen and carbon dioxide, thermal degradation, contact angle measurement, water and vapour uptake, leachability and biocompatibility (haemolytic potential, thrombogenicity and cytotoxicity). A conventional organic plasticizer (di-isononyl phthalate) was used for comparison purposes. The results obtained showed that it was possible to change the neat PVC hydrophobicity, and consequently its water uptake capacity and plasticizer leachability, just by changing the PhIL employed and its composition. It was also possible to significantly change the thermal and mechanical properties of PVC films by choosing appropriate PhIL cation/anion combinations. However, a specific PhIL may not always be capable of simultaneously keeping and/or improving both physical properties. In addition, ionic halide salts were found to promote PVC dehydrochlorination. Finally, none of the prepared materials presented toxicity against Caco-2 cells, though pure [P(6,6,6,14)][dca] decreased HepG2 cells viability. Moreover, PVC films with [P(6,6,6,14)][dca] and [P(4,4,4,4)][Cl] were found to be haemolytic and thus these PhILs must be avoided as PVC modifiers if biomedical applications are envisaged. In conclusion, from all the PhILs tested, [P(6,6,6,14)][Tf(2)N] showed the most promising results regarding blood compatibility, leaching and permeability to gases of PVC films. The results presented are a strong indicator that adequate PhILs may be successfully employed as PVC multi-functional plasticizers for a wide range of potential applications, including those in the biomedical field.
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Affiliation(s)
- Ana M A Dias
- CIEPQPF, Chemical Engineering Department, FCTUC, University of Coimbra, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal.
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29
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Costa AJL, Soromenho MRC, Shimizu K, Marrucho IM, Esperança JMSS, Lopes JNC, Rebelo LPN. Density, Thermal Expansion and Viscosity of Cholinium-Derived Ionic Liquids. Chemphyschem 2012; 13:1902-9. [DOI: 10.1002/cphc.201100852] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 01/20/2012] [Indexed: 11/07/2022]
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30
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31
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Kowacz M, Mukhopadhyay A, Carvalho AL, Esperança JMSS, Romão MJ, Rebelo LPN. Hofmeister effects of ionic liquids in protein crystallization: Direct and water-mediated interactions. CrystEngComm 2012. [DOI: 10.1039/c2ce25129a] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Pereiro AB, Araújo JMM, Oliveira FS, Bernardes CES, Esperança JMSS, Canongia Lopes JN, Marrucho IM, Rebelo LPN. Inorganic salts in purely ionic liquid media: the development of high ionicity ionic liquids (HIILs). Chem Commun (Camb) 2012; 48:3656-8. [DOI: 10.1039/c2cc30374d] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Rocha MAA, Lima CFRAC, Gomes LR, Schröder B, Coutinho JAP, Marrucho IM, Esperança JMSS, Rebelo LPN, Shimizu K, Lopes JNC, Santos LMNBF. High-Accuracy Vapor Pressure Data of the Extended [CnC1im][Ntf2] Ionic Liquid Series: Trend Changes and Structural Shifts. J Phys Chem B 2011; 115:10919-26. [DOI: 10.1021/jp2049316] [Citation(s) in RCA: 184] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marisa A. A. Rocha
- Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, R. Campo Alegre 687, P-4169-007 Porto, Portugal
| | - Carlos F. R. A. C. Lima
- Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, R. Campo Alegre 687, P-4169-007 Porto, Portugal
| | - Lígia R. Gomes
- CIAGEB, Faculdade de Ciências da Saúde da UFP, Universidade Fernando Pessoa, R. Carlos da Maia 296, P-4200-150 Porto, Portugal
| | - Bernd Schröder
- CICECO, Departamento de Química, Universidade de Aveiro, P-3810-193 Aveiro, Portugal
| | - João A. P. Coutinho
- CICECO, Departamento de Química, Universidade de Aveiro, P-3810-193 Aveiro, Portugal
| | - Isabel M. Marrucho
- CICECO, Departamento de Química, Universidade de Aveiro, P-3810-193 Aveiro, Portugal
- Instituto de Tecnologia Química e Biológica, ITQB2, Universidade Nova de Lisboa, Av. República, Apartado 127, P-2780-901 Oeiras, Portugal
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica, ITQB2, Universidade Nova de Lisboa, Av. República, Apartado 127, P-2780-901 Oeiras, Portugal
| | - Luís P. N. Rebelo
- Instituto de Tecnologia Química e Biológica, ITQB2, Universidade Nova de Lisboa, Av. República, Apartado 127, P-2780-901 Oeiras, Portugal
| | - Karina Shimizu
- Centro de Química Estrutural/IST, Av. Rovisco Pais, P-1049-001 Lisboa, Portugal
| | - José N. Canongia Lopes
- Instituto de Tecnologia Química e Biológica, ITQB2, Universidade Nova de Lisboa, Av. República, Apartado 127, P-2780-901 Oeiras, Portugal
- Centro de Química Estrutural/IST, Av. Rovisco Pais, P-1049-001 Lisboa, Portugal
| | - Luís M. N. B. F. Santos
- Centro de Investigação em Química, Departamento de Química e Bioquímica, Faculdade de Ciências da Universidade do Porto, R. Campo Alegre 687, P-4169-007 Porto, Portugal
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Ruivo D, Pereiro AB, Esperança JMSS, Canongia Lopes JN, Rebelo LPN. Rationalizing the Diverse Solid−Liquid Equilibria of Binary Mixtures of Benzene and Its Fluorinated Derivatives. J Phys Chem B 2010; 114:12589-96. [DOI: 10.1021/jp105639p] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Diana Ruivo
- Instituto de Tecnologia Química e Biológica, (www.itqb.unl.pt), UNL, Av. República, Apartado 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, (cqe.ist.utl.pt), IST/UTL, 1049 001 Lisboa, Portugal
| | - Ana B. Pereiro
- Instituto de Tecnologia Química e Biológica, (www.itqb.unl.pt), UNL, Av. República, Apartado 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, (cqe.ist.utl.pt), IST/UTL, 1049 001 Lisboa, Portugal
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica, (www.itqb.unl.pt), UNL, Av. República, Apartado 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, (cqe.ist.utl.pt), IST/UTL, 1049 001 Lisboa, Portugal
| | - José N. Canongia Lopes
- Instituto de Tecnologia Química e Biológica, (www.itqb.unl.pt), UNL, Av. República, Apartado 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, (cqe.ist.utl.pt), IST/UTL, 1049 001 Lisboa, Portugal
| | - Luis P. N. Rebelo
- Instituto de Tecnologia Química e Biológica, (www.itqb.unl.pt), UNL, Av. República, Apartado 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, (cqe.ist.utl.pt), IST/UTL, 1049 001 Lisboa, Portugal
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35
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Pereiro AB, Deive FJ, Rodríguez A, Ruivo D, Canongia Lopes JN, Esperança JMSS, Rebelo LPN. New Insight into Phase Equilibria Involving Imidazolium Bistriflamide Ionic Liquids and Their Mixtures with Alcohols and Water. J Phys Chem B 2010; 114:8978-85. [DOI: 10.1021/jp104245g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana B. Pereiro
- Instituto de Tecnología Química e Biológica, Universidade Nova de Lisboa (UNL), Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST/UTL), 1049-001 Lisboa, Portugal
| | - Francisco J. Deive
- Instituto de Tecnología Química e Biológica, Universidade Nova de Lisboa (UNL), Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST/UTL), 1049-001 Lisboa, Portugal
| | - Ana Rodríguez
- Instituto de Tecnología Química e Biológica, Universidade Nova de Lisboa (UNL), Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST/UTL), 1049-001 Lisboa, Portugal
| | - Diana Ruivo
- Instituto de Tecnología Química e Biológica, Universidade Nova de Lisboa (UNL), Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST/UTL), 1049-001 Lisboa, Portugal
| | - José N. Canongia Lopes
- Instituto de Tecnología Química e Biológica, Universidade Nova de Lisboa (UNL), Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST/UTL), 1049-001 Lisboa, Portugal
| | - José M. S. S. Esperança
- Instituto de Tecnología Química e Biológica, Universidade Nova de Lisboa (UNL), Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST/UTL), 1049-001 Lisboa, Portugal
| | - Luís P. N. Rebelo
- Instituto de Tecnología Química e Biológica, Universidade Nova de Lisboa (UNL), Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, Vigo University, P.O. Box 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST/UTL), 1049-001 Lisboa, Portugal
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36
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Vitorino J, Leal JP, Minas da Piedade ME, Canongia Lopes JN, Esperança JMSS, Rebelo LPN. The Nature of Protic Ionic Liquids in the Gas Phase Revisited: Fourier Transform Ion Cyclotron Resonance Mass Spectrometry Study of 1,1,3,3-Tetramethylguanidinium Chloride. J Phys Chem B 2010; 114:8905-9. [DOI: 10.1021/jp1042798] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joana Vitorino
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1649-016 Lisboa, Portugal, Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal (www.itqb.unl.pt), and Centro de Química Estrutural, Complexo Interdisciplinar, Instituto Superior Técnico da Universidade Técnica de Lisboa, 1049-001
| | - João P. Leal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1649-016 Lisboa, Portugal, Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal (www.itqb.unl.pt), and Centro de Química Estrutural, Complexo Interdisciplinar, Instituto Superior Técnico da Universidade Técnica de Lisboa, 1049-001
| | - Manuel E. Minas da Piedade
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1649-016 Lisboa, Portugal, Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal (www.itqb.unl.pt), and Centro de Química Estrutural, Complexo Interdisciplinar, Instituto Superior Técnico da Universidade Técnica de Lisboa, 1049-001
| | - José N. Canongia Lopes
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1649-016 Lisboa, Portugal, Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal (www.itqb.unl.pt), and Centro de Química Estrutural, Complexo Interdisciplinar, Instituto Superior Técnico da Universidade Técnica de Lisboa, 1049-001
| | - José M. S. S. Esperança
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1649-016 Lisboa, Portugal, Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal (www.itqb.unl.pt), and Centro de Química Estrutural, Complexo Interdisciplinar, Instituto Superior Técnico da Universidade Técnica de Lisboa, 1049-001
| | - Luís Paulo N. Rebelo
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, 1649-016 Lisboa, Portugal, Unidade de Ciências Químicas e Radiofarmacêuticas, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal (www.itqb.unl.pt), and Centro de Química Estrutural, Complexo Interdisciplinar, Instituto Superior Técnico da Universidade Técnica de Lisboa, 1049-001
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Deive FJ, Rodríguez A, Pereiro AB, Shimizu K, Forte PAS, Romão CC, Canongia Lopes JN, Esperança JMSS, Rebelo LPN. Phase Equilibria of Haloalkanes Dissolved in Ethylsulfate- or Ethylsulfonate-Based Ionic Liquids. J Phys Chem B 2010; 114:7329-37. [DOI: 10.1021/jp1025015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Francisco J. Deive
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - Ana Rodríguez
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - Ana B. Pereiro
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - Karina Shimizu
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - Paulo A. S. Forte
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - Carlos C. Romão
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - José N. Canongia Lopes
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - José M. S. S. Esperança
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
| | - Luís P. N. Rebelo
- Instituto de Tecnologia Química e Biológica, UNL, Avenida República 127, 2780-901 Oeiras, Portugal, Chemical Engineering Department, University of Vigo, 36310, Vigo, Spain, and Centro de Química Estrutural, Instituto Superior Técnico, UTL, 1049 001 Lisboa, Portugal
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Leal JP, da Piedade MEM, Canongia Lopes JN, Tomaszowska AA, Esperança JMSS, Rebelo LPN, Seddon KR. Bridging the gap between ionic liquids and molten salts: group 1 metal salts of the bistriflamide anion in the gas phase. J Phys Chem B 2009; 113:3491-8. [PMID: 19278265 DOI: 10.1021/jp811039b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fourier transform ion cyclotron resonance mass spectrometry experiments showed that liquid Group 1 metal salts of the bistriflamide anion undergoing reduced-pressure distillation exhibit a remarkable behavior that is in transition between that of the vapor-liquid equilibrium characteristics of aprotic ionic liquids and that of the Group 1 metal halides: the unperturbed vapors resemble those of aprotic ionic liquids, in the sense that they are essentially composed of discrete ion pairs. However, the formation of large aggregates through a succession of ion-molecule reactions is closer to what might be expected for Group 1 metal halides. Similar experiments were also carried out with bis{(trifluoromethyl)sulfonyl}amine to investigate the effect of H(+), which despite being the smallest Group 1 cation, is generally regarded as a nonmetal species. In this case, instead of the complex ion-molecule reaction pattern found for the vapors of Group 1 metal salts, an equilibrium similar to those observed for aprotic ionic liquids was observed.
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Affiliation(s)
- João P Leal
- Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Lisboa, Portugal
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Rebelo LPN, Lopes JNC, Esperança JMSS, Guedes HJR, Łachwa J, Najdanovic-Visak V, Visak ZP. Accounting for the unique, doubly dual nature of ionic liquids from a molecular thermodynamic and modeling standpoint. Acc Chem Res 2007; 40:1114-21. [PMID: 17622178 DOI: 10.1021/ar7000556] [Citation(s) in RCA: 200] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The fascinating, complex behavior of ionic liquids is analyzed using a molecular perspective that emphasizes the doubly dual nature of ionic liquids underlying the existence of cations and anions forming high- and low-charge-density regions. Our work bridges the liquid, gas, and solid phases spanning 5 years of research on themes as diverse as the vaporization, liquid-liquid demixing, solidification, and thermophysical behavior of ionic liquids and their mixtures and solutions.
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Affiliation(s)
- Luís Paulo N Rebelo
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. República, Apartado 127, 2780-901 Oeiras, Portugal.
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Rebelo LPN, Canongia Lopes JN, Esperança JMSS, Filipe E. On the critical temperature, normal boiling point, and vapor pressure of ionic liquids. J Phys Chem B 2007; 109:6040-3. [PMID: 16851662 DOI: 10.1021/jp050430h] [Citation(s) in RCA: 251] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One-stage, reduced-pressure distillations at moderate temperature of 1-decyl- and 1-dodecyl-3-methylimidazolium bistriflilamide ([Ntf(2)](-)) ionic liquids (ILs) have been performed. These liquid-vapor equilibria can be understood in light of predictions for normal boiling points of ILs. The predictions are based on experimental surface tension and density data, which are used to estimate the critical points of several ILs and their corresponding normal boiling temperatures. In contrast to the situation found for relatively unstable ILs at high-temperature such as those containing [BF(4)](-) or [PF(6)](-) anions, [Ntf(2)](-)-based ILs constitute a promising class in which reliable, accurate vapor pressure measurements can in principle be performed. This property is paramount for assisting in the development and testing of accurate molecular models.
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Abstract
Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS) experiments showed that when aprotic ionic liquids vaporize under pressure and temperature conditions similar to those of a reduced-pressure distillation, the gas phase is composed of discrete anion-cation pairs. The evolution of the mass spectrometric signals recorded during fractional distillations of binary ionic liquid mixtures allowed us to monitor the changes of the gas-phase composition and the relative volatility of the components. In addition, we have studied a protic ionic liquid, and demonstrated that it exists as separated neutral molecules in the gas phase.
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Affiliation(s)
- João P Leal
- Departamento de Química, Instituto Tecnológico e Nuclear, 2686-953 Sacavém, Portugal
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Santos LMNBF, Lopes JNC, Coutinho JAP, Esperança JMSS, Gomes LR, Marrucho IM, Rebelo LPN. Ionic liquids: first direct determination of their cohesive energy. J Am Chem Soc 2007; 129:284-5. [PMID: 17212402 DOI: 10.1021/ja067427b] [Citation(s) in RCA: 277] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luís M N B F Santos
- Centro de Investigação em Química, Faculdade de Ciências, Universidade do Porto, R. Campo Alegre, 687, 4169 007 Porto, Portugal
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Earle MJ, Esperança JMSS, Gilea MA, Lopes JNC, Rebelo LPN, Magee JW, Seddon KR, Widegren JA. The distillation and volatility of ionic liquids. Nature 2006; 439:831-4. [PMID: 16482154 DOI: 10.1038/nature04451] [Citation(s) in RCA: 1204] [Impact Index Per Article: 66.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2005] [Accepted: 11/21/2005] [Indexed: 11/09/2022]
Abstract
It is widely believed that a defining characteristic of ionic liquids (or low-temperature molten salts) is that they exert no measurable vapour pressure, and hence cannot be distilled. Here we demonstrate that this is unfounded, and that many ionic liquids can be distilled at low pressure without decomposition. Ionic liquids represent matter solely composed of ions, and so are perceived as non-volatile substances. During the last decade, interest in the field of ionic liquids has burgeoned, producing a wealth of intellectual and technological challenges and opportunities for the production of new chemical and extractive processes, fuel cells and batteries, and new composite materials. Much of this potential is underpinned by their presumed involatility. This characteristic, however, can severely restrict the attainability of high purity levels for ionic liquids (when they contain poorly volatile components) in recycling schemes, as well as excluding their use in gas-phase processes. We anticipate that our demonstration that some selected families of commonly used aprotic ionic liquids can be distilled at 200-300 degrees C and low pressure, with concomitant recovery of significant amounts of pure substance, will permit these currently excluded applications to be realized.
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Affiliation(s)
- Martyn J Earle
- The QUILL Centre, The Queen's University of Belfast, Stranmillis Road, Belfast BT9 5AG, UK
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Lachwa J, Szydlowski J, Najdanovic-Visak V, Rebelo LPN, Seddon KR, Nunes da Ponte M, Esperança JMSS, Guedes HJR. Evidence for Lower Critical Solution Behavior in Ionic Liquid Solutions. J Am Chem Soc 2005; 127:6542-3. [PMID: 15869269 DOI: 10.1021/ja0510257] [Citation(s) in RCA: 118] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lower critical solution temperatures (LCST)-type of phase diagrams, including the presence of closed loops, have been encountered for the first time in binary and quasi-binary liquid solutions of ionic liquids. Furthermore, the results constitute the first experimental support for the existence of a theoretically postulated, but never encountered, special kind of type VII phase diagram. Two distinct mechanisms are involved in the appearance of demixing upon temperature increase. These findings underlie the presence of specific, oriented interactions between the ionic liquid, 1-alkyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide, [Cnmim][NTf2], and trichloromethane, as well as aggregation phenomena.
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Affiliation(s)
- Joanna Lachwa
- Instituto de Tecnologia Química e Biológica, UNL, Av. República, Apartado 127, 2780-901 Oeiras, Portugal
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Canongia Lopes JN, Cordeiro TC, Esperança JMSS, Guedes HJR, Huq S, Rebelo LPN, Seddon KR. Deviations from Ideality in Mixtures of Two Ionic Liquids Containing a Common Ion. J Phys Chem B 2005; 109:3519-25. [PMID: 16851388 DOI: 10.1021/jp0458699] [Citation(s) in RCA: 232] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Excess molar volumes of six binary mixtures composed of two ionic liquids of the 1-methyl-3-alkyl-imidazolium bis(trifluoromethylsulfonyl)amide family -- ([C(m)()mim] + [C(n)()mim])[NTf(2)] with n and m ranging from 2 to 10 -- were measured for several compositions at 298 and 333 K. Similarly, three other binary systems containing [C(4)mim](+) (1-methyl-3-butylimidazolium) as a common cation have been studied: [C(4)mim]([NTf(2)] + [PF(6)]), [C(4)mim]([NTf(2)] + [BF(4)]) and [C(4)mim]([BF(4)] + [PF(6)]). Thus, the mixing process of two distinct ions of equal sign embedded in a constant field network of a given counterion was analyzed. All systems exhibit small, positive V(E) values of the order of a few tenths of cm(3) mol(-1), which are essentially temperature and pressure independent. The results show additive trends, for instance, the V(E) values become larger as the difference between the alkyl chain lengths of the two cations increases. The Flory theory of mixtures provides a useful, semiquantitative correlation between the excess volumes and excess enthalpies in these systems, allowing for comparison with analogous results obtained within the linear primary alcohols.
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Affiliation(s)
- José N Canongia Lopes
- Centro de Química Estrutural, Instituto Superior Técnico, 1049-001 Lisboa, Portugal.
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Najdanovic-Visak V, Esperança JMSS, Rebelo LPN, Nunes da Ponte M, Guedes HJR, Seddon KR, de Sousa HC, Szydlowski J. Pressure, Isotope, and Water Co-solvent Effects in Liquid−Liquid Equilibria of (Ionic Liquid + Alcohol) Systems. J Phys Chem B 2003. [DOI: 10.1021/jp034576x] [Citation(s) in RCA: 146] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Najdanovic-Visak V, Serbanovic A, Esperança JMSS, Guedes HJR, Rebelo LPN, da Ponte MN. Supercritical carbon dioxide-induced phase changes in (ionic liquid, water and ethanol mixture) solutions: application to biphasic catalysis. Chemphyschem 2003; 4:520-2. [PMID: 12785271 DOI: 10.1002/cphc.200300663] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Vesna Najdanovic-Visak
- Instituto de Tecnologia Química e Biológica Universidade Nova de Lisboa, Apartado 127 2781-901 Oeiras, Portugal
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Najdanovic-Visak V, Esperança JMSS, Rebelo LPN, Nunes da Ponte M, Guedes HJR, Seddon KR, Szydlowski J. Phase behaviour of room temperature ionic liquid solutions: an unusually large co-solvent effect in (water + ethanol). Phys Chem Chem Phys 2002. [DOI: 10.1039/b201723g] [Citation(s) in RCA: 201] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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