1
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Hernández SI, Altava B, Portillo-Rodríguez JA, Santamaría-Holek I, García-Alcántara C, Luis SV, Compañ V. The Debye length and anionic transport properties of composite membranes based on supported ionic liquid-like phases (SILLPS). Phys Chem Chem Phys 2022; 24:29731-29746. [PMID: 36458515 DOI: 10.1039/d2cp01519f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An analysis of the ionic transport properties of BMIM [NTf2] in supported ionic-liquid-like phase (SILLP)-based membranes has been carried out based on experimental impedance spectroscopy measurements. The direct current (dc)-conductivity was analyzed to determine the temperature and frequency dependence. The fit of the loss tangent curve data with the Cole-Cole approximation of the electrode polarization model provides the conductivity, diffusivity, and density of charge carriers. Among these quantities, a significant increase in conductivity is observed when an ionic liquid is added to the polymeric matrix containing imidazolium fragments. The use of a recent generalization of Eyring's absolute rate theory allowed the elucidation of how the local entropy restrictions, due to the porosity of the polymeric matrix, control the conductive process. The fit of the conductivity data as a function of temperature manifests the behavior of the excess entropy with respect to the temperature. The activation entropy and enthalpy were also determined. Our results correlate the Debye length (LD) with the experimental values of conductivity, electrode polarization relaxation time, and sample relaxation time involved. Our work provides novel insights into the description of ionic transport in membranes as the diffusivity, mobility, and free charge density depend on the LD. Moreover, we discuss the behavior of the polarization relaxation time, the sample relaxation time, and the static permittivity as a function of the temperature.
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Affiliation(s)
- S I Hernández
- Unidad Multidisciplinaria de Docencia e Investigación-Juriquilla, Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Juriquilla, Querétaro, CP 76230, Mexico.
| | - Belen Altava
- Departamento de Química Orgánica, Universitat Jaume I, 12080-Castellón de la Plana, Spain.
| | - J A Portillo-Rodríguez
- Facultad de Ingeniería, Universidad Autónoma de Quéretaro, Cerro de las Campanas s/n, Centro Universitario, C.P. 760009, Querétaro, Mexico.
| | - Iván Santamaría-Holek
- Unidad Multidisciplinaria de Docencia e Investigación-Juriquilla, Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Juriquilla, Querétaro, CP 76230, Mexico.
| | - C García-Alcántara
- Escuela Nacional de Estudios Superiores Juriquilla, Universidad Nacional Autónoma de México (UNAM), Juriquilla, Querétaro, CP 76230, Mexico.
| | - Santiago V Luis
- Departamento de Química Orgánica, Universitat Jaume I, 12080-Castellón de la Plana, Spain.
| | - Vicente Compañ
- Departamento de Termodinámica Aplicada, Universitat Politécnica de Valencia, C/Camino de Vera s/n, 46022-Valencia, Spain.
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2
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Valls A, Altava B, Aseyev V, Carreira-Barral I, Conesa L, Falomir E, García-Verdugo E, Luis SV, Quesada R. Structure-antitumor activity relationships of tripodal imidazolium-amino acid based salts. Effect of the nature of the amino acid, amide substitution and anion. Org Biomol Chem 2021; 19:10575-10586. [PMID: 34734950 DOI: 10.1039/d1ob01825f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The antitumor activity of imidazolium salts is highly dependent upon their lipophilicity that can be tuned by the introduction of different hydrophobic substituents on the nitrogen atoms of the imidazolium ring of the molecule. Taking this into consideration, we have synthesized and characterized a series of tripodal imidazolium salts derived from L-valine and L-phenylalanine containing different hydrophobic groups and tested them against four cancer cell lines at physiological and acidic pH. At acidic pH (6.2) the anticancer activity of some of the tripodal compounds changes dramatically, and this parameter is crucial to control their cytotoxicity and selectivity. Moreover, several of these compounds displayed selectivity against the control healthy cell line higher than four. The transmembrane anion transport studies revealed moderate transport abilities suggesting that the observed biological activity is likely not the result of just their transport activity. The observed trends in biological activity at acidic pH agree well with the results for the CF leakage assay. These results strongly suggest that this class of compounds can serve as potential chemotherapeutic agents.
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Affiliation(s)
- Adriana Valls
- Department of Inorganic and Organic Chemistry, ESTCE, University Jaume I, Av. Sos Baynat, s/n, 12004, Castellón, Spain.
| | - Belén Altava
- Department of Inorganic and Organic Chemistry, ESTCE, University Jaume I, Av. Sos Baynat, s/n, 12004, Castellón, Spain.
| | - Vladimir Aseyev
- Department of Chemistry, University of Helsinki, P.O. Box 55 (A413, A. I. Virtasen aukio 1), FIN-00014 HY Helsinki, Finland
| | | | - Laura Conesa
- Department of Inorganic and Organic Chemistry, ESTCE, University Jaume I, Av. Sos Baynat, s/n, 12004, Castellón, Spain.
| | - Eva Falomir
- Department of Inorganic and Organic Chemistry, ESTCE, University Jaume I, Av. Sos Baynat, s/n, 12004, Castellón, Spain.
| | - Eduardo García-Verdugo
- Department of Inorganic and Organic Chemistry, ESTCE, University Jaume I, Av. Sos Baynat, s/n, 12004, Castellón, Spain.
| | - Santiago Vicente Luis
- Department of Inorganic and Organic Chemistry, ESTCE, University Jaume I, Av. Sos Baynat, s/n, 12004, Castellón, Spain.
| | - Roberto Quesada
- Department of Chemistry, Faculty of Science, Universidad de Burgos, 09001 Burgos, Spain
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3
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Valls A, Altava B, Aseyev V, García-Verdugo E, Luis SV. Imidazolium based gemini amphiphiles derived from L-valine. Structural elements and surfactant properties. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Tellez-Cruz MM, Escorihuela J, Solorza-Feria O, Compañ V. Proton Exchange Membrane Fuel Cells (PEMFCs): Advances and Challenges. Polymers (Basel) 2021; 13:3064. [PMID: 34577965 PMCID: PMC8468942 DOI: 10.3390/polym13183064] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 08/21/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022] Open
Abstract
The study of the electrochemical catalyst conversion of renewable electricity and carbon oxides into chemical fuels attracts a great deal of attention by different researchers. The main role of this process is in mitigating the worldwide energy crisis through a closed technological carbon cycle, where chemical fuels, such as hydrogen, are stored and reconverted to electricity via electrochemical reaction processes in fuel cells. The scientific community focuses its efforts on the development of high-performance polymeric membranes together with nanomaterials with high catalytic activity and stability in order to reduce the platinum group metal applied as a cathode to build stacks of proton exchange membrane fuel cells (PEMFCs) to work at low and moderate temperatures. The design of new conductive membranes and nanoparticles (NPs) whose morphology directly affects their catalytic properties is of utmost importance. Nanoparticle morphologies, like cubes, octahedrons, icosahedrons, bipyramids, plates, and polyhedrons, among others, are widely studied for catalysis applications. The recent progress around the high catalytic activity has focused on the stabilizing agents and their potential impact on nanomaterial synthesis to induce changes in the morphology of NPs.
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Affiliation(s)
- Miriam M. Tellez-Cruz
- Department of Chemistry, Centro de Investigación y de Estudios Avanzados, Av. IPN 2508, Ciudad de México 07360, Mexico; (M.M.T.-C.); (O.S.-F.)
| | - Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València, Av. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Omar Solorza-Feria
- Department of Chemistry, Centro de Investigación y de Estudios Avanzados, Av. IPN 2508, Ciudad de México 07360, Mexico; (M.M.T.-C.); (O.S.-F.)
| | - Vicente Compañ
- Departamento de Termodinámica Aplicada (ETSII), Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
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5
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Vicent C, Valls A, Escorihuela J, Altava B, Luis S. Unveiling anion-induced folding in tripodal imidazolium receptors by ion-mobility mass spectrometry. Chem Commun (Camb) 2021; 57:8616-8619. [PMID: 34369516 DOI: 10.1039/d1cc02818a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The anion-induced folding of tripodal imidazolium receptors has been investigated by NMR spectroscopy, electrospray ionization ion mobility mass spectrometry and DFT calculations. Such folding can be switched by anion release upon collision induced dissociation.
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Affiliation(s)
- Cristian Vicent
- Servei Central d'Instrumentació Científica (SCIC), Universitat Jaume I, Avda. Sos Baynat s/n, 12006 Castellón, Spain.
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6
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Barjola A, Escorihuela J, García-Bernabé A, Sahuquillo Ó, Giménez E, Compañ V. Diffusivity and free anion concentration of ionic liquid composite polybenzimidazole membranes. RSC Adv 2021; 11:26379-26390. [PMID: 35479428 PMCID: PMC9037350 DOI: 10.1039/d1ra05364g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 07/27/2021] [Indexed: 11/21/2022] Open
Abstract
PBI composite membranes containing 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIM-NTf2) at 1, 5, 10, 20 and 50 wt% have been prepared and the conductivity has been analyzed by electrochemical impedance spectroscopy.
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Affiliation(s)
- Arturo Barjola
- Instituto de Tecnología de Materiales
- Universitat Politècnica de València
- 46022 Valencia
- Spain
| | - Jorge Escorihuela
- Departamento de Química Orgánica
- Universitat de València
- 46100 Valencia
- Spain
| | - Abel García-Bernabé
- Departamento de Termodinámica Aplicada
- Universitat Politècnica de València
- 46022 Valencia
- Spain
| | - Óscar Sahuquillo
- Instituto de Tecnología de Materiales
- Universitat Politècnica de València
- 46022 Valencia
- Spain
| | - Enrique Giménez
- Instituto de Tecnología de Materiales
- Universitat Politècnica de València
- 46022 Valencia
- Spain
| | - Vicente Compañ
- Departamento de Termodinámica Aplicada
- Universitat Politècnica de València
- 46022 Valencia
- Spain
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7
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Imidazole and Imidazolium Antibacterial Drugs Derived from Amino Acids. Pharmaceuticals (Basel) 2020; 13:ph13120482. [PMID: 33371256 PMCID: PMC7767166 DOI: 10.3390/ph13120482] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/17/2020] [Accepted: 12/17/2020] [Indexed: 11/17/2022] Open
Abstract
The antibacterial activity of imidazole and imidazolium salts is highly dependent upon their lipophilicity, which can be tuned through the introduction of different hydrophobic substituents on the nitrogen atoms of the imidazole or imidazolium ring of the molecule. Taking this into consideration, we have synthesized and characterized a series of imidazole and imidazolium salts derived from L-valine and L-phenylalanine containing different hydrophobic groups and tested their antibacterial activity against two model bacterial strains, Gram-negative E. coli and Gram-positive B. subtilis. Importantly, the results demonstrate that the minimum bactericidal concentration (MBC) of these derivatives can be tuned to fall close to the cytotoxicity values in eukaryotic cell lines. The MBC value of one of these compounds toward B. subtilis was found to be lower than the IC50 cytotoxicity value for the control cell line, HEK-293. Furthermore, the aggregation behavior of these compounds has been studied in pure water, in cell culture media, and in mixtures thereof, in order to determine if the compounds formed self-assembled aggregates at their bioactive concentrations with the aim of determining whether the monomeric species were in fact responsible for the observed antibacterial activity. Overall, these results indicate that imidazole and imidazolium compounds derived from L-valine and L-phenylalanine—with different alkyl lengths in the amide substitution—can serve as potent antibacterial agents with low cytotoxicity to human cell lines.
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8
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Hu Y, Long S, Fu H, She Y, Xu Z, Yoon J. Revisiting imidazolium receptors for the recognition of anions: highlighted research during 2010-2019. Chem Soc Rev 2020; 50:589-618. [PMID: 33174897 DOI: 10.1039/d0cs00642d] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Imidazolium based receptors selectively recognize anions, and have received more and more attention. In 2006 and 2010, we reviewed the mechanism and progress of imidazolium salt recognition of anions, respectively. In the past ten years, new developments have emerged in this area, including some new imidazolium motifs and the identification of a wider variety of biological anions. In this review, we discuss the progress of imidazolium receptors for the recognition of anions in the period of 2010-2019 and highlight the trends in this area. We first classify receptors based on motifs, including some newly emerging receptors, as well as new advances in existing receptor types at this stage. Then we discuss separately according to the types of anions, including ATP, GTP, DNA and RNA.
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Affiliation(s)
- Ying Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, China.
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9
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Butler SM, Jolliffe KA. Molecular recognition and sensing of dicarboxylates and dicarboxylic acids. Org Biomol Chem 2020; 18:8236-8254. [PMID: 33001119 DOI: 10.1039/d0ob01761b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The recognition and detection of dicarboxylic acids and dicarboxylates is of significance for a wide variety of applications, including medical diagnosis, monitoring of health and of environmental contaminants, and in industry. Hence small molecule receptors and sensors for dicarboxylic acids and dicarboxylates have great potential for applications in these fields. This review outlines the challenges faced in the recognition and detection of these species, strategies that have been used to obtain effective and observable interactions with dicarboxylic acids and dicarboxylates, and progress made in this field in the period from 2014 to 2020.
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Affiliation(s)
- Stephen M Butler
- School of Chemistry, The University of Sydney, NSW 2006, Australia.
| | - Katrina A Jolliffe
- School of Chemistry, The University of Sydney, NSW 2006, Australia. and The University of Sydney Nano Institute (Sydney Nano), The University of Sydney, NSW 2006, Australia
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10
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González-Rodríguez J, Valls A, Arias Abrodo P, Gutiérrez Álvarez MD, González-Álvarez J, Altava B, Luis SV. Polymeric Ionic Liquids Derived from L-Valine for the Preparation of Highly Selective Silica-Supported Stationary Phases in Gas Chromatography. Polymers (Basel) 2020; 12:E2348. [PMID: 33066384 PMCID: PMC7602222 DOI: 10.3390/polym12102348] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 10/12/2020] [Indexed: 02/03/2023] Open
Abstract
A series of silica-supported polymeric ionic liquid (PIL)-based stationary phases derived from a vinylic L-valine ionic liquid monomer and divinylbenzene (DVB) as the crosslinking agent have been prepared and studied as gas chromatographic stationary phases. These coated gas chromatographic columns exhibited good thermal stabilities (230-300 °C) and high efficiencies (1700-2700 plates/m), and were characterized using a linear solvation parameter model in order to understand the effects of the amount of DVB on the features of the resulting composite systems. Their retention behavior and separation efficiencies were demonstrated using the Grob test. By tuning the crosslinking degree for the IL-derived stationary phase, the separation selectivity and resolution of different compounds were improved. The different retention behaviors observed for many analytes indicate that these stationary phases may be applicable as new types of GC stationary phases.
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Affiliation(s)
- Jorge González-Rodríguez
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain; (J.G.-R.); (P.A.A.); (M.D.G.Á.)
| | - Adriana Valls
- Department of Organic and Inorganic Chemistry, University Jaume I, Avda. V. Sos Baynat, 12071 Castellón, Spain;
| | - Pilar Arias Abrodo
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain; (J.G.-R.); (P.A.A.); (M.D.G.Á.)
| | - María Dolores Gutiérrez Álvarez
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain; (J.G.-R.); (P.A.A.); (M.D.G.Á.)
| | - Jaime González-Álvarez
- Department of Physical and Analytical Chemistry, University of Oviedo, Julián Clavería 8, 33006 Oviedo, Spain; (J.G.-R.); (P.A.A.); (M.D.G.Á.)
| | - Belén Altava
- Department of Organic and Inorganic Chemistry, University Jaume I, Avda. V. Sos Baynat, 12071 Castellón, Spain;
| | - Santiago V. Luis
- Department of Organic and Inorganic Chemistry, University Jaume I, Avda. V. Sos Baynat, 12071 Castellón, Spain;
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11
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Escorihuela J, Olvera-Mancilla J, Alexandrova L, del Castillo LF, Compañ V. Recent Progress in the Development of Composite Membranes Based on Polybenzimidazole for High Temperature Proton Exchange Membrane (PEM) Fuel Cell Applications. Polymers (Basel) 2020; 12:E1861. [PMID: 32825111 PMCID: PMC7564738 DOI: 10.3390/polym12091861] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 12/16/2022] Open
Abstract
The rapid increasing of the population in combination with the emergence of new energy-consuming technologies has risen worldwide total energy consumption towards unprecedent values. Furthermore, fossil fuel reserves are running out very quickly and the polluting greenhouse gases emitted during their utilization need to be reduced. In this scenario, a few alternative energy sources have been proposed and, among these, proton exchange membrane (PEM) fuel cells are promising. Recently, polybenzimidazole-based polymers, featuring high chemical and thermal stability, in combination with fillers that can regulate the proton mobility, have attracted tremendous attention for their roles as PEMs in fuel cells. Recent advances in composite membranes based on polybenzimidazole (PBI) for high temperature PEM fuel cell applications are summarized and highlighted in this review. In addition, the challenges, future trends, and prospects of composite membranes based on PBI for solid electrolytes are also discussed.
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Affiliation(s)
- Jorge Escorihuela
- Departamento de Química Orgánica, Universitat de València, Av. Vicent Andrés Estellés s/n, Burjassot, 46100 Valencia, Spain
| | - Jessica Olvera-Mancilla
- Departamento de Polímeros, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico; (J.O.-M.); (L.A.); (L.F.d.C.)
| | - Larissa Alexandrova
- Departamento de Polímeros, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico; (J.O.-M.); (L.A.); (L.F.d.C.)
| | - L. Felipe del Castillo
- Departamento de Polímeros, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), Ciudad Universitaria, Coyoacán, Ciudad de México 04510, Mexico; (J.O.-M.); (L.A.); (L.F.d.C.)
| | - Vicente Compañ
- Departamento de Termodinámica Aplicada (ETSII), Universitat Politècnica de València, Camino de Vera. s/n, 46022 Valencia, Spain
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12
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Priyanka V, Gardas RL. Mono- and di- cationic ionic liquids based aqueous biphasic systems for the extraction of diclofenac sodium. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116048] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Rezki N, Al-Sodies SA, Ahmed HE, Ihmaid S, Messali M, Ahmed S, Aouad MR. A novel dicationic ionic liquids encompassing pyridinium hydrazone-phenoxy conjugates as antimicrobial agents targeting diverse high resistant microbial strains. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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14
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Valls A, Altava B, Burguete MI, Escorihuela J, Martí-Centelles V, Luis SV. Supramolecularly assisted synthesis of chiral tripodal imidazolium compounds. Org Chem Front 2019. [DOI: 10.1039/c9qo00163h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Supramolecular interactions based on amide groups direct the preferential formation of tritopic instead of monotopic or ditopic imidazolium compounds.
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Affiliation(s)
- Adriana Valls
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- Castellón
- Spain
| | - Belén Altava
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- Castellón
- Spain
| | - M. Isabel Burguete
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- Castellón
- Spain
| | - Jorge Escorihuela
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- Castellón
- Spain
| | | | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- Castellón
- Spain
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15
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Rubio OH, Taouil R, Muñiz FM, Monleón LM, Simón L, Sanz F, Morán JR. A molecular receptor selective for zwitterionic alanine. Org Biomol Chem 2018; 15:477-485. [PMID: 27929186 DOI: 10.1039/c6ob02237e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A molecular receptor has been synthesized joining an aza-crown ether with a chiral chromane which mimics the oxyanion hole of the enzymes. With this receptor an apolar host-guest complex with zwitterionic alanine has been achieved through the formation of up to seven H-bonds. This complex allows the extraction of aqueous alanine to a chloroform phase, while other natural amino acids are poorly extracted or are not extracted at all. Due to the chiral nature of the receptor, enantioselective extraction from the aqueous alanine solution to a chloroform phase takes place. X-Ray analysis combined with anisotropic effects, NOE and CD studies revealed the absolute configuration of both strong and weak complexes. Modelling studies also support the proposed structures. The presence of an oxyanion-hole motif in this structure was corroborated by X-ray diffraction studies.
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Affiliation(s)
- Omayra H Rubio
- Organic Chemistry Department, University of Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain
| | - Rachid Taouil
- Organic Chemistry Department, University of Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain
| | - Francisco M Muñiz
- Department of Organic Chemistry, Faculty of Chemical Sciences, University of Concepción, Edmundo Larenas 129, PO Box 160-C, Concepción, Chile.
| | - Laura M Monleón
- Organic Chemistry Department, University of Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain
| | - Luis Simón
- Engineering Chemistry Department, University of Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain
| | - Francisca Sanz
- X-Ray Diffraction Service, University of Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain
| | - Joaquín R Morán
- Organic Chemistry Department, University of Salamanca, Plaza de los Caídos 1-5, 37008 Salamanca, Spain
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16
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Carmo dos Santos NA, Badetti E, Licini G, Abbate S, Longhi G, Zonta C. A stereodynamic fluorescent probe for amino acids. Circular dichroism and circularly polarized luminescence analysis. Chirality 2017; 30:65-73. [DOI: 10.1002/chir.22780] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 09/28/2017] [Accepted: 10/02/2017] [Indexed: 01/09/2023]
Affiliation(s)
| | - Elena Badetti
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
| | - Sergio Abbate
- Department of Molecular and Translational Medicine; Università di Brescia; Brescia BS Italy
| | - Giovanna Longhi
- Department of Molecular and Translational Medicine; Università di Brescia; Brescia BS Italy
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche; Università degli Studi di Padova; Padova PD Italy
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17
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Abstract
A simple and efficient method for the synthesis of novel water soluble antioxidants in the form of dicationic ionic liquids (DILs) was described in the framework of our study.
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Affiliation(s)
- Kamil Czerniak
- Department of Chemical Technology
- Poznan University of Technology
- 60-965 Poznan
- Poland
| | - Filip Walkiewicz
- Department of Chemical Technology
- Poznan University of Technology
- 60-965 Poznan
- Poland
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18
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Chiral lactic hydrazone derivatives as potential bioactive antibacterial agents: Synthesis, spectroscopic, structural and molecular docking studies. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.09.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Escorihuela J, Burguete MI, Ujaque G, Lledós A, Luis SV. Mechanistic implications of the enantioselective addition of alkylzinc reagents to aldehydes catalyzed by nickel complexes with α-amino amide ligands. Org Biomol Chem 2016; 14:11125-11136. [DOI: 10.1039/c6ob01878e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The enantioselective alkylation of aldehydes catalysed by nickel(ii)-complexes derived from α-amino amides was studied by means of density functional theory (DFT) and ONIOM (B3LYP:UFF) calculations.
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Affiliation(s)
- Jorge Escorihuela
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- 12071 Castellón de la Plana
- Spain
| | - M. Isabel Burguete
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- 12071 Castellón de la Plana
- Spain
| | - Gregori Ujaque
- Unitat de Química Física
- Departament de Química
- Edifici Cn. Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Agustí Lledós
- Unitat de Química Física
- Departament de Química
- Edifici Cn. Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- 12071 Castellón de la Plana
- Spain
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González-Mendoza L, Altava B, Burguete MI, Escorihuela J, Hernando E, Luis SV, Quesada R, Vicent C. Bis(imidazolium) salts derived from amino acids as receptors and transport agents for chloride anions. RSC Adv 2015. [DOI: 10.1039/c5ra05880e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Binding properties towards different anions and chloride transport activity have been studied using different bis(imidazolium) salts.
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Affiliation(s)
| | - Belén Altava
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- E-12071 Castellón
- Spain
| | - M. Isabel Burguete
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- E-12071 Castellón
- Spain
| | - Jorge Escorihuela
- Wageningen UR
- Laboratory of Organic Chemistry
- 6703 HB Wageningen
- The Netherlands
| | - Elsa Hernando
- Departamento de Química
- Facultad de Ciencias
- Universidad de Burgos
- 09001 Burgos
- Spain
| | - Santiago V. Luis
- Departamento de Química Inorgánica y Orgánica
- Universitat Jaume I
- E-12071 Castellón
- Spain
| | - Roberto Quesada
- Departamento de Química
- Facultad de Ciencias
- Universidad de Burgos
- 09001 Burgos
- Spain
| | - Cristian Vicent
- Serveis Centrals d'Instrumentació Científica
- Universitat Jaume I
- 12071 Castellón
- Spain
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