Article
Chemistry, Physical
Corentin Cruche, William Neiderer, Shawn K. Collins
Summary: Rare energy-transfer processes involving copper complexes were explored in this study. By utilizing the optimized heteroleptic copper complex Cu(bphen)(XantPhos)BF4, photosensitized E -> Z isomerization of olefins was demonstrated. The XantPhos ligand provided sensitizers with improved catalyst stability, and the bphen ligand lengthened the excited-state lifetime. Successful photoisomerization reactions were conducted on a series of 25 di- and trisubstituted alkenes.
Article
Engineering, Chemical
Ana R. F. Carreira, Ana M. Ferreira, Mafalda R. Almeida, Joao A. P. Coutinho, Tania E. Sintra
Summary: The commercialization of chiral drugs is a growing concern in pharmacology due to the potential issues with the pharmacological activities of enantiomers in racemates. This study aimed to develop a platform for the resolution of propranolol using chiral selectors in biphasic systems, with a focus on enantioselective liquid-liquid extraction (ELLE) systems. The most efficient biphasic system identified involved 1,2-dichloroethane-water, dipentyl-L-tartrate, and boric acid as chiral selectors, achieving an enantioselectivity of 2.54.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Etty N. Kusumawati, Masayuki Shirai
Summary: This short review provides a brief overview of the development of catalytic applications in biphasic systems containing ionic liquids (ILs) in the past two years. The progress in the functionalization of ILs themselves and the combination of homogeneous and heterogeneous catalysts with ILs is described. Prospects and future challenges are also addressed.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2022)
Article
Chemistry, Physical
Aline M. M. Bessa, Regiane S. Pinheiro, Filipe X. Feitosa, Hosiberto B. de Sant'Ana, Rilvia S. de Santiago-Aguiar
Summary: Low viscosity lactam-based ionic liquids were evaluated as extractor solvents for organic components separation. The results showed that the anion structures of the ILs influenced the solubility of the ternary mixtures, while the cation structures mainly affected the miscibility of cyclohexene and cyclohexane. ILs containing ester anions exhibited good selectivity in the separation of aromatic and aliphatic compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Anusha Basaiahgari, Ramesh L. Gardas
Summary: Ionic liquid (IL)-based aqueous biphasic systems (ABSs) have attracted significant interest for extraction and separation of value-added compounds, serving as alternative solvents for non-biocompatible volatile organic compounds. Significant developments have been made in phase constituting components, temperature, pH, and extraction mechanisms in the field of IL-based ABS.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Chuanying Liu, Jianhui Lan, Qibin Yan, Zhipeng Wang, Chao Xu, Weiqun Shi, Chengliang Xiao
Summary: A new temperature-responsive alkaline aqueous biphasic system was developed to remove radioactive (TcO4-)-Tc-99. The micelle formed in the system showed a high affinity toward (TcO4-)-Tc-99 and could extract more than 98.6% of it from the waste supernatant. The loaded (TcO4-)-Tc-99 could be easily stripped using concentrated nitric acid.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Ana F. C. S. Rufino, Joana M. Bola, Joao A. . P. Coutinho, Francisca A. . E. Silva, Mara G. Freire, Emanuel Capela
Summary: Aqueous biphasic systems (ABS) have the potential to enhance separation processes by integrating multiple unit operations and operating under continuous mode. This study proposes the use of ionic liquids (ILs) as components of double-stimuli-responsive ABS, showing simultaneous responsiveness to temperature and pH. The findings inspire the development of customizable separation techniques, improving the performance and sustainability of separation processes.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Engineering, Chemical
Ana F. C. S. Rufino, Sara C. Ribeiro, Joao A. P. Coutinho, Francisca A. Silva, Mara G. Freire
Summary: This study proposes the use of triblock copolymers to develop double stimuli-responsive aqueous biphasic systems (ABS) with ionic liquids (ILs). The ABS exhibit a Lower Critical Solution Temperature (LCST)-like behavior and only show a simultaneous response to both pH and temperature when using a specific copolymer. Copolymers with an adequate content of polyethylene oxide (PEO) provide a stronger response to the simultaneous action of pH and temperature compared to the homopolymer polypropylene glycol (PPG). The results highlight the importance of adjusting polymer structure/monomer composition in developing ABS with double response to temperature and pH. The enhanced tailoring ability of the proposed systems is demonstrated through the simultaneous separation of two dyes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Energy & Fuels
Chuhua Jia, Cheng Zhang, Shaoqu Xie, Wanli Zhang, Ziling Wang, Hongfei Lin
Summary: Researchers have developed a novel biphasic catalytic process to efficiently produce bio-jet fuel from fatty acids, aiming to reduce the production costs in the aviation industry. By adjusting the catalyst and solvent, cracking selectivity can be tuned. The optimized Ru/C catalyst exhibits excellent performance, achieving high carbon yield of jet-fuel-range alkanes at relatively low temperatures.
Article
Chemistry, Physical
Shraddha Deshmukh, Aditya Madan Bhatt, Anil Boda, Rohit Singh Chauhan, Sk. Musharaf Ali, Arijit Sengupta
Summary: The efficient separation of tetravalent thorium ion (Th4+) from aqueous phase to ionic liquid phase was explored using two compounds, L1 and L2. The electron density on N in L1 was higher than that in L2 due to the positive inductive effect of the alkyl group. The extraction proceeded via a "cation exchange" mechanism, and each thorium complex was associated with three nitrate ions. The importance of this research is rated as 8 out of 10.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Paper & Wood
Ashlee Aiello, Tyler Cosby, David P. Durkin, Paul C. Trulove
Summary: The effects of variable ionic liquid treatment time on the morphology evolution of biphasic cellulose xerogels were studied using nitrogen gas physisorption and Raman spectroscopy. The results showed a constant pore size and increasing BET surface area with increasing treatment time. Raman spectroscopy confirmed the composition of the xerogel phase. Three regimes were identified to describe the propagation and growth of the cellulose phase.
Article
Chemistry, Multidisciplinary
Daniele Fiorito, Malaury Simon, Christophe M. Thomas, Clement Mazet
Summary: A [Ni/Mg]-catalyzed orthogonal tandem polymerization has been developed, starting from enol phosphates and leading to 1,4-cis-polydienes with selectivities up to 99%. By simple structural modifications of the monomeric unit, elastomeric or crystalline materials can be obtained. This tandem approach provides a straightforward and efficient way to enforce diversity and selectivity in diene polymerization while retaining a fair degree of control.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Engineering, Environmental
Wei Yang, Qiankun Han, Wenshi Li, Maosheng Wu, Jing Yao, Man Zhao, Xianmao Lu
Summary: This study proposes an electrolyte for redox-enhanced electrochemical capacitors (redox ECs) with the aim of suppressing self-discharge by blocking the diffusion of polyiodides at a liquid-liquid interface. The experimental results show that the EC cells with this electrolyte exhibit lower open circuit voltage drop and better energy retention compared to cells with conventional electrolyte.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Dichao Shi, Svetlana Heyte, Mickael Capron, Sebastien Paul
Summary: This review paper discusses strategies to improve the yield of dimethyl carbonate (DMC) synthesis, focusing on catalysts for CO2 and methanol activation, as well as the use of dehydrating agents for in situ water trapping during the reaction.
Article
Biochemistry & Molecular Biology
Wenbo Li, Yilin Wang, Dongchen Li, Jiachi Jiang, Kunlan Li, Kaili Zhang, Qingda An, Shangru Zhai, Ligang Wei
Summary: The oxidative depolymerization of alkali lignin in the [C(2)C(1)im]OAc system under mild conditions was successful, with the addition of water further improving reaction efficiency. The system allowed for the breakdown of specific inter-unit linkages of lignin, resulting in residual lignin with low molecular weight and narrow polydispersity index. The [C(2)C(1)im]OAc-based system proved to be a simple and efficient catalytic system for lignin oxidative depolymerization.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Engineering, Environmental
Jonathan Albo, Muhammad I. Qadir, Mario Samperi, Jesum Alves Fernandes, Imanol de Pedro, Jairton Dupont
Summary: The study achieved continuous conversion of CO2 into methanol using Cu nanoparticles synthesized in TiO2 photocatalyst in an optofluidic microreactor, outperforming previous Cu/TiO2-based systems and common CO2 photoreactors.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Alexander J. Kibler, Virginia S. Souza, Jesum Alves Fernandes, William Lewis, Stephen P. Argent, Jairton Dupont, Graham N. Newton
Summary: In this study, an organic-inorganic hybrid species based on the Wells-Dawson polyoxotungstate and novel fluorescent benzothiadiazole-imidazolium cations has been synthesized. X-ray crystallographic analysis revealed a hydrogen-bonded superstructure between the inorganic and organic components, with non-equivalent cations showing varying degrees of rotation between the BTD and imidazolium rings. UV-vis diffuse reflectance spectra indicated a band gap of 3.13 eV, while solid-state fluorescence properties suggested electron transfer between the inorganic and organic components.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Muhammad Qadir, Daniel L. Baptista, Jairton Dupont
Summary: This study demonstrates that ruthenium nanoparticles decorated on TiO2 nanomaterials with different morphologies show high efficiency and selectivity for the allylic oxidation of cycloalkenes. The Ru/TiO2 nanofibers display the highest activity, while Ru/TiO2 nanoparticles and nanotubes also exhibit good conversion rates. The catalytic efficiency of Ru/TiO2 nanomaterials is higher compared to Ru NPs and TiO2 nanomaterials individually, indicating a positive synergistic effect. The results suggest that the crystalline structure, pore volume, and surface area of the supports play a role in determining the activity of Ru/TiO2 NPs and NFs.
Article
Chemistry, Physical
Michele O. Vieira, Wesley F. Monteiro, Thuany M. Ferreira, Josiel B. Domingos, Jairton Dupont, Francisco P. dos Santos, Jackson D. Scholten
Summary: Surface active ionic liquids, particularly dicationic ILs, have attracted interest for their sustainable catalytic and extraction properties. The anion plays a crucial role in modulating the ILs' properties in solution, with some ILs showing superior ionic organization.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Michael Nazarkovsky, Bozena Czech, Alicja Zmudka, Viktor M. Bogatyrov, Olena Artiushenko, Vladimir Zaitsev, Tatiana D. Saint-Pierre, Rafael C. Rocha, Jiang Kai, Yutao Xing, Wellington D. G. Goncalves, Amanda G. Veiga, Maria Luiza M. Rocco, Syed Hamza Safeer, Mariia Galaburda, Victor Carozo, Ricardo Q. Aucelio, Richard J. Caraballo-Vivas, Olena Oranska, Jairton Dupont
Summary: Novel colorized zinc oxide-nanosilica composites were synthesized and analyzed, showing a direct correlation between ZnO concentration and color/optical properties. The most active sample had a higher ZnO concentration and exhibited significant visible light absorbance and luminescence. XPS studies revealed the formation of nanocomposites and impurities in ZnO that contributed to the optical and catalytic behavior, confirming the potential for wastewater detoxification.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Physical
Muhammad Qadir, Jonathan Albo, Imanol de Pedro, Miroslav Cieslar, Ignacio Hernandez, Philipp Bruener, Thomas Grehl, Marcus Castegnaro, Jonder Morais, Paulo R. Martins, Cristiane G. Silva, Muhammad Nisar, Jairton Dupont
Summary: Efficient and robust photocatalysts have been developed by combining bimetallic CuNi nanoparticles and TiO2. The CuNi NPs decorated TiO2 significantly promote the generation of CH3OH and syngas under visible light irradiation, achieving high yields and quantum efficiency.
MOLECULAR CATALYSIS
(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.
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
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
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)
Article
Chemistry, Multidisciplinary
Emerson C. Kohlrausch, Roberto dos Reis, Rhys W. Lodge, Isabel Vicente, Alexandre G. Brolo, Jairton Dupont, Jesum Alves Fernandes, Marcos J. L. Santos
Summary: The presence of a specific fraction of {112} facets on the TiO2 surface is found to be the key limiting step for anatase-to-rutile phase transition, instead of the crystallite size. This discovery allows for controlling the phase transition over a wide range of temperatures by suppressing the formation of {112} facets on anatase particles using specific concentrations of fluorinated ionic liquid during TiO2 synthesis.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Gabriel Abarca, Wellington D. G. Goncalves, Brunno L. Albuquerque, Jairton Dupont, Martin H. G. Prechtl, Jackson D. Scholten
Summary: Bimetallic RuPd nanoparticles immobilized in ionic liquids showed high catalytic activity for the selective hydrogenation of benzene and phenol, producing cyclohexane and cyclohexanol. The activity and selectivity are dependent on the ratio of Ru to Pd in the bimetallic nanoparticles.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Rodrigo Webber, Muhammad I. Qadir, Eduardo Sola, Marta Martin, Elizabeth Suarez, Jairton Dupont
CATALYSIS COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Brunno L. Albuquerque, Gustavo Chacon, Michael Nazarkovsky, Jairton Dupont
NEW JOURNAL OF CHEMISTRY
(2020)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
