Article
Chemistry, Physical
Sukanya Das, Niharika Kashyap, Sangeeta Kalita, Debanga Bhusan Bora, Ruli Borah
Summary: Twelve N-SO3H functionalised ammonium and imidazolium based Bronsted acidic ionic liquids with varying anions were synthesized and characterized. The effects of different cations and anions on the properties of the ILs were studied. The conductivity of the ILs in different solvents was measured and correlated with solvatochromic parameters of the solvents. The polarity of the ILs was studied using fluorescence emission spectroscopy. The electrochemical stability of the ILs in different solvents was determined. Among the four types of anions, CF3COO(- )and Cl- were found to have higher thermal stability.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Energy & Fuels
Zhiwen Ma, Tao Lu, Yali Pan, Yupeng Yuan, Yingqiang Sun
Summary: This study investigates the effect of alkyl chain length of cations in ionic liquids (ILs) on in-situ transesterification (IST) of microalgae. The results show that shorter alkyl chains of cations are favorable for cellulose extraction and biodiesel yield.
Article
Chemistry, Physical
Abobakr K. Ziyada, Abdelbagi Osman, Abdullah Ahmed Elbashir, Fahd Rajab, Abdul Majeed Khan, Mei Musa Ali Omar, Cecilia Devi Wilfred
Summary: This study synthesized propanenitrile imidazolium-based ionic liquids with different functional groups (allyl, ethoxyl, and benzyl) and incorporating dioctylsulfosuccinate (DOSS) anion. The elemental analysis and NMR results confirmed the synthesized IL structures. The properties of these ILs, including density, viscosity, refractive index, and several thermodynamic properties, were measured and analyzed. The findings provide valuable insights into the properties and potential applications of these ILs.
Article
Engineering, Chemical
Dawei Fang, Li Li, Jialin Miao, Peizhen Gao, Yuxin Zhang, Mei Hong, Jin Liu, Jie Wei
Summary: This study synthesized and characterized three ionic liquids and investigated their properties in binary systems with acetonitrile. The results indicate strong interactions, mainly ion-dipole interactions, between the ionic liquids and acetonitrile. The physical properties such as thermal expansion coefficient, excess molar volumes, and refractive index deviations were calculated and analyzed using the Redlich-Kister equation.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Physical
Kazuki Yoshii, Takuya Uto, Takakazu Onishi, Daichi Kosuga, Naoki Tachikawa, Yasushi Katayama
Summary: This study investigated the physicochemical properties of room temperature ionic liquids (RTILs) with different ether oxygen atoms through experimental and computational approaches. The results show that the position and number of ether oxygen atoms have a significant impact on the viscosity and transport properties of RTILs, providing valuable insights for the design of functionalized RTILs for various applications.
Article
Thermodynamics
S. Doblinger, D. S. Silvester, M. Costa Gomes
Summary: The solubilities of non-polar and polar gases in functionalized alkyl imidazolium ionic liquids were reported, showing that sulphur dioxide has the highest solubility. Oxygen is generally more soluble than hydrogen, and the molar volume of the ionic liquid and the presence of polar groups in the cation affect gas solubilities. None of the gases studied are chemically absorbed in the ionic liquids.
FLUID PHASE EQUILIBRIA
(2021)
Article
Chemistry, Physical
O. Palumbo, F. Trequattrini, A. Cimini, A. Tsurumaki, M. A. Navarra, A. Paolone
Summary: The study investigates the intra- and intermolecular interactions in ether-functionalized ionic liquids through infrared spectroscopy measurements, finding that the trans conformer of the FSI anion is more stable than the cis conformer and there is evidence of hydrogen bonding between the anion's O atom and the closest H atoms on the cation. The results suggest that such highly directional interactions are more observable in ether-functionalized samples, particularly those containing FSI as an anion.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Polymer Science
Praveenkumar Sappidi, Xiaoyang Liu, Kathryn E. O'Harra, Jason E. Bara, C. Heath Turner
Summary: Molecular dynamics simulations and complementary experiments were used to study the inter- and intramolecular structures and conformational properties of imidazolium ionenes in an ionic liquid. Different chemical and structural variations of the polymers were found to affect their internal interactions and interactions with surrounding molecules, resulting in changes in chain flexibility and alignment of imidazolium groups. The concentration of alkyl groups and polymer architecture also play important roles in determining the polymer structure and properties.
Article
Chemistry, Multidisciplinary
Yuval Simha, Gil Daniels, Amalya Goldman, Elihay Kuniavsky, Dmitry Tsvelikhovsky
Summary: A new strategy for direct access to fully substituted polycyclic imidazolium salts using alpha-enaminones and proline as the reagents is reported. This open-flask operation is a catalyst-, metal-, and Lewis acid-free green process, which does not require an ion-exchange step. It can produce good yields with minimal formation of side products, and is not limited to aryl substituents.
Article
Polymer Science
Anna Sowinska, Magdalena Maciejewska, Laina Guo, Etienne Delebecq
Summary: Task-specific ionic liquids (TSILs) are designed for specific applications to improve the efficiency of vulcanization of rubber compounds while maintaining safe processing, characterized by satisfactory functional properties in EPDM vulcanizates.
Article
Engineering, Chemical
Chi-Linh Do-Thanh, Huimin Luo, James A. Gaugler, Sheng Dai
Summary: A 1,2-hydroxypyridinone (HOPO) grafted ionic liquid (HOPO-IL) was synthesized and investigated for its extraction performance in various ionic liquids (ILs) and organic solvents. The results showed that the extraction performance of this HOPO-IL extractant was enhanced by approximately 2 folds in IL solvents compared to organic solvents. The study also revealed a strong pH dependence and a dominant cation-exchange mechanism of lanthanide extraction.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Nikolett Bagany, Aleksandar Tot, Milan Vranes, Slobodan Gadzuri
Summary: For the first time, a carboxyl-functionalized ionic liquid was synthesized and characterized, with experimental and computational determination of its acidity constant. The introduction of carboxyl group was found to enhance hydration and structure-making properties of the imidazolium-based ionic liquids, as supported by viscosity measurements and computational simulations.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Green & Sustainable Science & Technology
Shoaib Muhammad, Muhammad Naveed Javed, Komal Aziz Gill, Firdous Imran Ali, William Henderson, Ahmed Bari, Syed Ghulam Musharraf, Jameel Ahmed Baig, Imran Ali Hashmi
Summary: In this study, a green and efficient extraction method for iron triad elements from aqueous mixtures was developed using a novel ionic liquid. The method demonstrated high selectivity for cobalt and iron, while nickel was not easily detectable by the naked eye.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Physical
Qingshan Liu, Jiamin Chu, Xiaoxi Yang, Yulu Huang, Mingxing Zhao, Qige Zheng, Yanxia Qi
Summary: The densities of two functionalized ionic liquids with different ether solvents were measured, and apparent molar volumes were calculated at diluted concentrations. The effects of ether and methyl groups on the density and apparent molar volume were discussed, and the RRM equation was used for fitting. The infinite dilution apparent molar volumes, limiting apparent molar expansibility, and thermal expansion coefficients were obtained and discussed.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Review
Chemistry, Applied
Norah F. Alqahtani
Summary: This review explores the potential of Imidazolium-based ionic liquids (ImILs) in improving the solubility, stability, and functionality of chitosan, and provides an overview of the types and preparation methods of functionalized imidazolium ionic liquids (FImILs). Additionally, it discusses the various opportunities offered by FImIL-chitosan derivatives.
REACTIVE & FUNCTIONAL POLYMERS
(2024)
Article
Materials Science, Composites
Bilal Ghafoor, Henri Stephan Schrekker, Jonder Morais, Sandro Campos Amico
Summary: Carbon fiber composites require strong fiber-matrix interaction for high performance. This study explores the use of ionic liquids for non-covalent surface modification of carbon fiber. The modified fibers showed improved surface morphology and increased adhesion with epoxy resin, leading to enhanced interfacial shear strength. The proposed surface modification technique has the potential to improve the performance of carbon fiber polymer composites.
COMPOSITE INTERFACES
(2022)
Article
Entomology
Graziele Milani Pessini, Henri Stephan Schrekker, Vinicius Demetrio da Silva, Rafaela Barbosa Pares, Luis Francisco Angeli Alves, Lucineia de Fatima Chasko Ribeiro, Flavio Augusto Vicente Seixas, Maria Aparecida Fernandez
Summary: The effects of a pyridinium salt and seven imidazolium salts on a fungus causing white muscardine in silkworms were evaluated. One of the imidazolium salts was found to be effective in controlling the disease and had no negative effects on silkworm larvae development.
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
(2022)
Review
Materials Science, Composites
Eduardo Fischer Kerche, Eduardo Fonseca, Henri Stephan Schrekker, Sandro Campos Amico
Summary: This article provides an overview of the use of ionic liquids (IL) as compatibilizers in epoxy-based composites and discusses their effects. The results show that IL can enhance the interfacial interactions between reinforcements and epoxy matrix, leading to improved mechanical and thermal performances of the composites. It is suggested that further research is needed to explore strategies for using low IL content and to investigate the relationship between filler structure and composite properties.
POLYMER COMPOSITES
(2022)
Article
Public, Environmental & Occupational Health
Denise Leal dos Santos, Beni Jequicene Mussengue Chauque, Veridiana Gomes Virginio, Virgilio Carmenia Cossa, Christina Pettan-Brewer, Henri Stephan Schrekker, Marilise Brittes Rott
Summary: This article discusses the importance of One Health approaches in relation to Naegleria fowleri. The study reveals that climate change plays a major role in the growth and dispersion of the pathogen, and addresses issues such as temperature changes, antimicrobial resistance, and the transmission of other microorganisms. It emphasizes the urgency of diagnostic methods, development of new drugs, and environmental control measures.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2022)
Review
Chemistry, Multidisciplinary
Pedro Migowski, Pedro Lozano, Jairton Dupont
Summary: 1,3-Dialkyl imidazolium salts are versatile ionic liquids (ILs) that can function as solvents, supports, or modifiers for catalytic processes. They can modify the properties of catalysts and control the access of substrates and expulsion of products. The miscibility, hydrophobicity, ionicity, and basicity of ILs can be adjusted by choosing the appropriate alkyl side chain and anions, allowing fine-tuning of the catalytic system. ILs also offer the possibility of designing greener catalytic tools and various methods for product separation.
Article
Polymer Science
Eduardo Fischer Kerche, Agne Kairyte, Sylwia Czlonka, Vinicius Demetrio da Silva, Nicholas Alves Salles, Henri Stephan Schrekker, Sandro Campos Amico
Summary: In this study, four imidazolium-based ionic liquids were tested as compatibilizers for microcrystalline cellulose. The modified microcrystalline cellulose was used as reinforcements in epoxy resin to prepare biobased composites with enhanced performances. The imidazolium-based ionic liquids did not significantly modify the morphological and structural characteristics of the reinforcements, but improved the thermal stability, mechanical responses, and viscoelastic response of the composites.
Article
Immunology
Fernanda Giesel Baldissera, Tiago Fazolo, Matheus Brasil da Silva, Paulo Cesar de Santana Filho, Vinicius Demetrio da Silva, David Max Rivillo Perez, Joice Sandra Klitzke, Eduardo Giovanni de Oliveira Soares, Luiz Carlos Rodrigues Jr, Alessandra Peres, Eliane Dallegrave, Kely Campos Navegantes-Lima, Marta Chagas Monteiro, Henri Stephan Schrekker, Pedro Roosevelt Torres Romao
Summary: This study investigated the leishmanicidal activity of 24 imidazolium salts against Leishmania parasites, and found that 8 of them showed potential as drug candidates against the parasites and infected host cells.
FRONTIERS IN IMMUNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Muhammad I. Qadir, Jairton Dupont
Summary: Ionic liquids (ILs) are potential materials for capturing and converting CO2 to energy-adducts. They create a confined space around catalysts, controlling the diffusion of reactants, intermediates, and products through their hydrophobicity and contact ion pairs. By combining ILs with semiconductors, the electronic properties of the catalysts can be modulated to facilitate CO2 activation and increase photoreduction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Composites
Bilal Ghafoor, Umar Farooq, Henri Stephan Schrekker, Sandro Campos Amico
Summary: Hybrid composite laminates with enhanced properties were prepared by non-covalently modifying multiwall carbon nanotubes with an ionic liquid. The laminate containing 1 wt% of modified carbon nanotubes exhibited the best mechanical and thermomechanical properties.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Polymer Science
Clarissa Martins Leal Schrekker, Yuri Clemente Andrade Sokolovicz, Maria Grazia Raucci, Claudio Alberto Martins Leal, Luigi Ambrosio, Mario Lettieri Teixeira, Alexandre Meneghello Fuentefria, Henri Stephan Schrekker
Summary: Candida species have the ability to form biofilms on polymeric surfaces, which is related to human diseases. HDPE films containing imidazolium salts were prepared and showed reduced biofilm formation. The imidazolium salts did not show cytotoxic effects and demonstrated good biocompatibility. These films have potential as biomaterials to reduce the risk of fungal infections in medical devices.
Article
Chemistry, Multidisciplinary
Vinicius K. Tomazett, Gustavo Chacon, Graciane Marin, Marcus V. Castegnaro, Rafael P. das Chagas, Luciano M. Liao, Jairton Dupont, Muhammad I. Qadir
Summary: Chemical fixation of CO2 to epoxides is an efficient and environmentally friendly approach to produce cyclic carbonates. By using the n-butyl-3-methylimidazulim trichlorozincate (BMIm.ZnCl3) ionic liquid as catalyst, high conversion rates (56-95%) of different aromatic and aliphatic epoxides were achieved under ambient reaction conditions. The activity of the catalyst was further enhanced by supporting the IL on SiO2, resulting in a maximum conversion and yield (99%) of cyclic carbonates at higher reaction conditions. The reaction mechanism was found to involve strong hydrogen bonding between the epoxide oxygen and the C2-H of the imidazolium cation, with the ZnCl3 anion acting as a nucleophile to facilitate ring opening without dissociation.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Materials Science, Multidisciplinary
Marianna Mamusa, David Chelazzi, Michele Baglioni, Sergio Murgia, Emiliano Fratini, David Rivillo, Piet W. N. M. van Leeuwen, Henri S. Schrekker, Piero Baglioni
Summary: Solutions of weakly coordinating ionic liquids (ILs) in alkyl carbonates have attracted attention due to their green solvents properties, but the understanding of ILs' phase behavior and structure in organic polar solvents is lacking. This study investigates the interactions and nanoscale structure of a specific IL, [BMIm][BARF], in alkyl carbonate solvents. The results show that [BMIm][BARF] is mostly undissociated in these solvents and the presence of rod-like nanostructures in the IL/solvent mixtures. The study also reveals that the self-assembly of nano-sized structures is hindered by slower ion diffusion in alkyl carbonates with lower dielectric constants. The findings have implications in various fields including batteries, catalysis, extraction, and bio-applications.
APPLIED MATERIALS TODAY
(2023)
Article
Entomology
Harry Luiz Pilz-Junior, Stephanie Jansen, Carolina Maica Silva, Juliana Fank Gomes, Debora Rech Volz, Alessandra Bittencourt de Lemos, Wellington Junior da Silva, Tarcisio Freitas Milagres, Josiane Somariva Prophiro, Jonas Schmidt-Chanasit, Ana Luiza Ziulkoski, Eliane Dallegrave, Henri Stephan Schrekker, Gertrudes Corcao, Onilda Santos da Silva
Summary: The study investigated the toxic potential of two imidazolium salts on Culex quinquefasciatus larvae and their effects on non-target organisms and the environment. The results showed that one of the salts, C(16)MImMeS, exhibited excellent larvicidal activity but also negatively impacted germination and growth of Lactuca sativa. Both imidazolium salts showed cytotoxicity, with C(16)MImMeS being more toxic to mouse lung fibroblasts and human keratinocytes. The results also indicated that C(18)MImCl had a relatively low toxicity to Wistar rats, suggesting its safe application in non-target organisms. Overall, this study provides important information for the development of mosquito control formulations.
JOURNAL OF PEST SCIENCE
(2023)
Article
Chemistry, Physical
Muhammad I. Qadir, Marcus V. Castegnaro, Felipe F. Selau, Daniel L. Baptista, Gustavo Chacon, Renato B. Pontes, Allan M. Lisboa, Dario Eberhardt, Jairton Dupont
Summary: Reducing atmospheric CO2 is a major challenge due to increased industrial activities and its contribution to global warming. One effective approach is converting CO2 into C1 feedstocks like formic acid (FA). Ruthenium clusters and nanoparticles prepared by magnetron sputtering in different supported ionic liquid phases (SILPs) showed high efficiency in producing free FA. DFT calculations supported the hydrogenation of HCO3* to FA as the mechanistic approach.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Materials Science, Multidisciplinary
Niqab Khan, Rogerio Nunes Wolff, Hameed Ullah, Gustavo J. Chacon, Washington Santa Rosa, Jairton Dupont, Renato Vitalino Goncalves, Sherdil Khan
Summary: A dopant-free synthesis approach is presented to control the electronic structure of a semiconductor. BiVO4 synthesized using ionic liquids (ILs) showed improved photocatalytic performance, although it had a higher defect density and chemisorption compared to the conventional hydrothermal process.
MATERIALS ADVANCES
(2022)
