Article
Materials Science, Multidisciplinary
Fuad Othman Abdullah, Leila Behrouzi, Babak Kaboudin
Summary: This study developed a method for synthesizing highly stable PdNPs on AO extract, demonstrating its efficient catalytic activity in the reduction of nitroaromatic compounds. Characterization of the catalyst and investigation of product yields confirmed its practicality and high efficiency in the reaction.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Multidisciplinary Sciences
Ankit Thakuri, Mainak Banerjee, Amrita Chatterjee
Summary: In this study, a rapid and convenient method for the synthesis of unsymmetrical azo dyes was developed using microwave-assisted and metal-catalyst-free techniques. The effects of electronic and substituent groups on the reaction were thoroughly understood through competitive reactions.
Article
Chemistry, Physical
Debika Gogoi, Rajeshvari Samatbhai Karmur, Manash R. Das, Narendra Nath Ghosh
Summary: Water pollution is a major issue that threatens human health and aquatic life. This study presents a highly efficient catalyst (Cu-CF-PC) derived from biomass, which can effectively remove various water pollutants. The catalyst is cost-effective, reusable, and environmentally friendly.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Jie Yin, Zhouyang Yin, Jing Jin, Mingzi Sun, Bolong Huang, Honghong Lin, Zhenhui Ma, Michelle Muzzio, Mengqi Shen, Chao Yu, Hong Zhang, Yong Peng, Pinxian Xi, Chun-Hua Yan, Shouheng Sun
Summary: A new form of catalyst using ferromagnetic hexagonal-close-packed (hcp) Co nanosheets has been developed for selective reduction of CO2 to ethanal. Through experimental testing and density functional theory (DFT) calculations, it was found that the unique intralayer electron transfer on the hcp Co surface promotes selective formation of ethanal by suppressing complete hydrogenation of intermediate products.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Binbin Feng, Rou Guo, Qiulan Cai, Yaping Song, Nan Li, Yanghe Fu, De-Li Chen, Jiangwei Zhang, Weidong Zhu, Fumin Zhang
Summary: This study provides an approach for fabricating isolated nickel single-atom sites catalyst with high performance in catalytic transfer hydrogenation reaction for aniline synthesis. The hollow structure facilitates the enhancement of catalytic performance.
Article
Chemistry, Applied
Piotr Cyganowski, Joanna Wolska
Summary: This study presents a new approach for synthesizing aromatic amines using nitroaromatic compounds (NARs) in contaminated wastewaters. The researchers developed anion exchange membranes with gold nanoparticles (AuNPs) to simultaneously reduce and separate the NARs. The nanocomposite membranes formed using tetrahydrofuran (THF) showed better performance in the reduction and separation process.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Chemistry, Organic
Ruiqin Zhang, Yuxin Ding, Renchao Ma, Xuqiong Xiao, Rener Chen, Lei Wang, Yongmin Ma
Summary: An efficient synthesis method for multi-substituted pyridines and pyrroles from aryl methyl ketones with 1-amino-2-methylpropan-2-ol and 1,2-diamino-2-methylpropane has been developed. The reactions involve cleavage of a C-N bond and formation of two new bonds (C-C bond and C-N bond) through an oxidative cyclization process promoted by I-2/PhNO2. The selective cleavage occurs at the C-N bond adjacent to the primary carbon of 1,2-diamino-2-methylpropane.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Review
Chemistry, Multidisciplinary
Ghodsi Mohammadi Ziarani, Zohreh Kheilkordi, Fatemeh Mohajer, Alireza Badiei, Rafael Luque
Summary: Magnetically recoverable nano-catalysts have been widely used in chemical reactions, particularly in the synthesis of pyridine derivatives with multicomponent reactions, showcasing a range of excellent biological activities.
Article
Biochemistry & Molecular Biology
Mohammad Hassan Maleki, Mahsa Rezaie, Mohammad Dinari
Summary: A green and facile method was developed to prepare catalysts with copper fixed on a magnetic carrageenan surface. The structure and morphology of the catalysts were analyzed, and their excellent performance in reducing nitrophenol compounds was confirmed. Due to the magnetic properties, the catalysts could be easily separated and used multiple times.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Energy & Fuels
Savan K. Raj, Kinjal B. Patel, Vartika Sharma, Divesh N. Srivastava, Vaibhav Kulshrestha
Summary: This study fabricated palladium-modified MXene nanoflowers using a facile hydrothermal treatment. The synthesized material, nPdNFs, showed successful incorporation of nPds in MXene nanoflowers and acted as an excellent support material. Among the calcined materials at different temperatures, nPdNFs-3 calcined at 300 degrees C exhibited the highest number of active catalytic sites for the hydrogen evolution reaction (HER), and its electrochemical performance was evaluated.
Article
Chemistry, Multidisciplinary
Chao-Zheng Zhou, Yu-Rou Zhao, Yan-Jun Guo, Ping Zhang, Yang Li
Summary: This study presents a sustainable method for the production of formaldehyde through the disproportionation of formic acid, catalyzed by iridium-triggered vanadium complexes under mild conditions. The successful demonstration of gram-scale application of in situ generated formaldehyde highlights the potential of this method in industrial production processes.
Article
Multidisciplinary Sciences
Adem Ruzgar, Yasar Karatas, Mehmet Gulcan
Summary: Nitrophenols are toxic and carcinogenic pollutants in agricultural and industrial wastewater that are resistant to organisms in water. This paper reports the efficient catalytic performance of Pd0@nano-HAp catalyst in reducing nitrophenols in water, as well as its reusability and thermodynamic parameters.
Article
Multidisciplinary Sciences
Zesong Ma, Zhilong Yang, Wenchuan Lai, Qiyou Wang, Yan Qiao, Haolan Tao, Cheng Lian, Min Liu, Chao Ma, Anlian Pan, Hongwen Huang
Summary: This study demonstrates the successful electrochemical reduction of CO2 to multicarbon products in strongly acidic electrolyte by combining the confinement effect and cation effect, showing high Faradaic efficiency, partial current density, and stability. The cation effect is found to play a crucial role in C-C coupling.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Applied
Veronica A. Jimenez, Kelly Marrugo, Cristian H. Campos, Joel B. Alderete, Cecilia C. Torres
Summary: Copper nanoparticles were synthesized with PEG-PAMAM-G3 as a capping agent, and were successfully used as catalysts for the reduction of poorly soluble nitrocompounds in aqueous media. The nanocatalysts showed efficient catalytic performance and stability, indicating their potential for environmentally friendly catalytic processes.
Article
Biochemistry & Molecular Biology
Laszlo Kollar, Adam Erdelyi, Haroon Rasheed, Attila Takacs
Summary: The study presents a novel synthetic method for producing N-acylnortropane derivatives of biological importance by aminocarbonylation reactions using tropane-based amines as N-nucleophiles and Pd(OAc)(2)/2 PPh3 catalysts, with the bidentate Xantphos ligand required for specific compounds. The resulting carboxamides were isolated and fully characterized, demonstrating the potential of this approach for accessing diverse structures of biologically relevant compounds.
Article
Chemistry, Physical
Dominik Madej, Adrian Konopko, Piotr Piotrowski, Agnieszka Krogul-Sobczak
Article
Chemistry, Applied
Jakub Cedrowski, Kajetan Dabrowa, Pawel Przybylski, Agnieszka Krogul-Sobczak, Grzegorz Litwinienko
Summary: SFN and ERN, two isothiocyanates, exhibit chemopreventive and anticancer activities by modulating cellular redox status and showing significant antioxidant effects at elevated temperatures. These effects are attributed to their ability to induce cytoprotective enzymes and participate in radical trapping during lipid oxidation.
Article
Chemistry, Multidisciplinary
Yafang Guo, Andrea Baschieri, Fabio Mollica, Luca Valgimigli, Jakub Cedrowski, Grzegorz Litwinienko, Riccardo Amorati
Summary: Research demonstrates that polydopamine exhibits excellent antioxidant activity by trapping alkylperoxyl radicals through reducing ortho-quinone moieties. This reaction occurs via a hydrogen atom transfer mechanism, as evidenced by the kinetic solvent effect observed in model quinone reactions with hydroperoxyl radicals. This discovery aids in understanding the redox-mediated bioactivity of melanins and quinones.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Inorganic & Nuclear
Sabina W. Jaros, Agnieszka Krogul-Sobczak, Barbara Bazanow, Magdalena Florek, Dominik Poradowski, Dmytro S. Nesterov, Urszula Sliwinska-Hill, Alexander M. Kirillov, Piotr Smolenski
Summary: Coordination polymers with bioactive metal centers and linkers, low toxicity, stability, tailorable structures, and bioavailability have emerged as a new class of potent biologically active agents. Quinolinic acid, a potent neurotoxic metabolite, has been utilized as a building block to assemble a new silver(I) coordination polymer with distinctive bioactive features, exhibiting remarkable antiviral, antibacterial, and selective cytotoxic activities. This study expands the family of bioactive coordination polymers with potent antiviral, antibacterial, and antiproliferative activity.
INORGANIC CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Jacek Grebowski, Paulina Kazmierska-Grebowska, Natalia Cichon, Piotr Piotrowski, Grzegorz Litwinienko
Summary: Fullerenols have antioxidant potential and can support the enzymatic antioxidant system within cells through interaction with enzymes.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Organic
Adrian Konopko, Grzegorz Litwinienko
Summary: Experimental and theoretical studies demonstrate that resveratrol is a potent scavenger of radicals in homogeneous systems. The effectiveness of resveratrol as an inhibitor of lipid peroxidation depends on pH, with the best effectiveness at pH 6. Resveratrol forms dimers with recovered ability to trap lipid peroxyl radicals, facilitated by its increased concentration at the lipid-water interface.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Katarzyna Jodko-Piorecka, Bozena Sikora, Monika Kluzek, Pawel Przybylski, Grzegorz Litwinienko
Summary: Catecholamines play a crucial role in signal transduction and can act as antioxidants. This study found that the increase in pH can significantly enhance the reaction rate between catecholamines and dpph radicals. Moreover, it was demonstrated that catecholamines can effectively trap radicals and inhibit lipid peroxidation, with the effectiveness depending on the ionization status of catechol and the lipid system organization.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Oncology
Anna Lewinska, Pawel Przybylski, Jagoda Adamczyk-Grochala, Dominika Bloniarz, Grzegorz Litwinienko, Maciej Wnuk
Summary: Cellular senescence is associated with aging and age-related diseases, and the elimination of senescent cells is considered a promising anti-aging strategy. In this study, a quercetin derivative, QD3, was found to sensitize breast cancer cells to apoptotic cell death induced by an anti-cancer drug, and also reduce proinflammatory and HSP70-based responses. This suggests that a combination of pro-senescence and senolytic activities may be a novel anti-cancer strategy.
Article
Chemistry, Medicinal
Jacek Grebowski, Grzegorz Litwinienko
Summary: Metallofullerenols are functionalized endohedral fullerenes with unique nanoscale activity. Besides diagnostics and magnetic resonance imaging, they have potential applications in cancer treatment by interacting with high-energy radiation and reactive oxygen species. Due to their antioxidant properties and ability to regulate gene expression, metallofullerenols can inhibit tumor growth and protect normal cells.
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Agnieszka Krogul-Sobczak, Natalia Pisarek, Piotr Cieciorski, Elzbieta Megiel
Summary: This paper presents a successful application of densely grafted silver nanostructures with stable nitroxide radicals as an effective catalyst for the selective oxidation of alcohols. The fabricated ultra-small and narrow dispersive silver nanoparticles have been fully characterized and shown to work efficiently under mild conditions. The high selectivity and recyclability make this catalyst a promising choice for green oxidation processes.
Article
Chemistry, Organic
Adrian Konopko, Grzegorz Litwinienko
Summary: The reaction between the stable nitroxyl radical TEMPO center dot and the 2,2'-diphenyl-1-picrylhydrazyl radical (dpph(center dot)) is greatly accelerated in the presence of resveratrol. This surprising synergistic effect is proposed to occur through a mutual activation mechanism between TEMPO center dot/RSV, resulting in extremely fast scavenging of dpph(center dot) radical.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Piotr Piotrowski, Agata Fedorczyk, Jacek Grebowski, Agnieszka Krogul-Sobczak
Summary: This study presents the design and synthesis of a series of fullerene derivatives capable of non-covalently modifying graphene sheets through pi-pi stacking interactions, which enhances its energy storage properties.
C-JOURNAL OF CARBON RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Pawel Przybylski, Adrian Konopko, Piotr Letowski, Katarzyna Jodko-Piorecka, Grzegorz Litwinienko
Summary: The reaction rates of a 2,2-diphenyl-1-picrylhydrazyl radical (dpph) with different phenols in methanol were measured to estimate the antiradical activity of phenolic compounds. The concentration of phenols was found to affect the reaction kinetics, with diluted phenols showing different kinetics compared to non-diluted solutions. This effect was explained by the ratio of [ArO-]/[ArOH], which leads to a higher contribution of electron transfer (ET) over hydrogen atom transfer (HAT) in diluted phenols. Simplified analysis of the reaction kinetics allowed for the estimation of k(ET)/k(HAT) ratios and the rate constants k(ET) for each phenol studied. These results demonstrate the importance of phenol concentration in determining the reaction mechanism and overall kinetics.
