Review
Biochemistry & Molecular Biology
Dorota Narog, Andrzej Sobkowiak
Summary: This review presents the electrochemical properties and oxidation mechanisms of flavonoids, and identifies the correlation between different potential regions and the molecular structures of flavonoids.
Article
Chemistry, Multidisciplinary
Ramapada Dolai, Rahul Kumar, Benedict J. Elvers, Pradeep Kumar Pal, Benson Joseph, Rina Sikari, Mithilesh Kumar Nayak, Avijit Maiti, Tejender Singh, Nicolas Chrysochos, Arumugam Jayaraman, Ivo Krummenacher, Jagannath Mondal, U. Deva Priyakumar, Holger Braunschweig, Cem B. Yildiz, Carola Schulzke, Anukul Jana
Summary: A new type of carbodicarbene (CDC) with two different classes of carbenes has been reported, which shows promising potential as organic electron donors and n-dopants. These compounds exhibit notable redox properties and can form carbon-carbon sigma bonds through reactions with [NO][SbF6].
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Analytical
Emad F. Newair, Francois Garcia
Summary: In this study, the reaction mechanism of the electrochemical oxidation of polyphenolic rosmarinic acid (RA) with GSH in aqueous solution was characterized using voltammetry and liquid chromatography-mass spectrometry. It was found that two consecutive oxidation steps of RA occurred, resulting in the identification of four RA-GSH conjugates. The acquired results provide better understanding and prediction of the oxidative degradation pathway of RA.
ANALYTICAL METHODS
(2022)
Article
Chemistry, Organic
Qiao Lin, Gregory Dawson, Tianning Diao
Summary: This article summarizes the experimentally measured redox potentials of nickel complexes supported on common ligands under various conditions, serving as a versatile tool for synthetic organic and organometallic chemists to evaluate the feasibility and kinetics of redox events occurring at the nickel center when designing catalytic reactions and preparing nickel complexes.
Article
Materials Science, Ceramics
V. V. Deshmukh, H. P. Nagaswarupa, N. Raghavendra
Summary: Transition metal ferrites play crucial roles in modern technology, with Co-doped MnFe2O4 nanomaterials showing promising super capacitive behavior for energy storage applications. Specifically, 2 wt% Co-doped MnFe2O4 exhibits the highest capacitance among the tested samples.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Erik Schroeter, Christian Stolze, Adrian Saal, Kristin Schreyer, Martin D. Hager, Ulrich S. Schubert
Summary: This study investigates an all-organic Nernstian potential-driven redox targeting system that combines a single-electrode material from organic radical batteries with a single redox couple of an aqueous, organic redox flow battery. The experimental results demonstrate that 78-90% of the theoretical capacity of the electrode material from the organic radical battery can be addressed when it is used as the redox target in the electrolyte tank of an operating aqueous organic redox flow battery.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Gamze Bozkurt Yildirim
Summary: Due to the increasing energy demand in the world and climate change, the importance of electrochemical energy storage devices has been increasing. In this study, Cr2O3 was prepared using the microemulsion method, and Co and Ni nanoparticles were prepared on Cr2O3 using the microwave assisted solvothermal method. The electrochemical properties of Co/Cr2O3 and Ni/Cr2O3 nanoparticles were investigated, and Ni/Cr2O3 nanoparticles showed better performance, with a maximum specific capacitance of 869.1±17.1 F/g at 1 A/g.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zeno B. G. Fickenscher, Leexander Torres-Texeira, Peter Loennecke, Evamarie Hey-Hawkins
Summary: A heterobimetallic [Mo degrees;CoIII] complex and the monometallic [CoIII] counterpart were synthesized and characterized. Both metals are electronically independent from each other. The catalytic activity of [Mo degrees;CoIII] and [CoIII] in homogeneous carbon dioxide hydrogenation to formate was studied, with [Mo degrees;CoIII] showing very low activity and [CoIII] showing no conversion.
INORGANICA CHIMICA ACTA
(2023)
Article
Biochemistry & Molecular Biology
Emad F. Newair, Abdulaziz Al-Anazi, Francois Garcia
Summary: This study investigates the antioxidant role of glutathione (GSH) in the oxidation process of wine polyphenols. Electrochemical methods and UPLC-MS techniques were used to determine the oxidation products and reaction pathways of polyphenols. The results show that in the presence of GSH, polyphenols undergo electrochemical oxidation and form GSH conjugates. These findings contribute to understanding and predicting the oxidative degradation pathway of polyphenols in wine, providing guidance for winemakers to control and optimize the sensory characteristics of their wines.
Article
Electrochemistry
Gabriel J. Mattos, Nikolai Yu. Tiuftiakov, Eric Bakker
Summary: This study demonstrates the successful application of a lipophilic derivative of the redox mediator TEMPO in ion transfer processes at the interface between two immiscible electrolyte solutions. The results show that TEMPO performs well in mediating anion and cation transfer across ion-selective membranes, and has potential applications in this field.
ELECTROCHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Deliang Meng, Xiaowei Huang, Zongyu Feng, Meng Wang, Juanyu Yang, Chao Xia, Yanyan Zhao, Yuqing Wei
Summary: This study designed an electrochemical experiment to monitor the reaction between Ce(4+) ions and Cl- ions at the electron level. The influences of Ce4+ ion concentration, temperature, and F- ion on the reduction peak potential of Ce4+ ion were investigated. The results showed that the reaction between Ce4+ ion and Cl- ion is irreversible without any intermediate products, and the diffusion during the electrode reaction is the rate-determining step. The temperature and Ce4+ ion concentration have negligible effects on the reduction peak potential, but a higher molar ratio of F- to Ce4+ promotes the reduction of Ce4+ ion to Ce(3+) ion. Furthermore, thiourea preferentially reduces Ce(4+) ions and inhibits the oxidation of Cl- ions to Cl2 by forming a complex with Cl- ions.
JOURNAL OF RARE EARTHS
(2022)
Article
Energy & Fuels
Olatunde S. Oladeji, Monisola I. Ikhile, Messai Mamo, Derek T. Ndinteh, Patrick G. Ndungu
Summary: This study evaluated the extracts of Garcinia kola, Cola Nitida, and Cola Accuminata for their potential application in dye-sensitized solar cells. The results showed that these extracts had different effects on the electrochemical properties and light-to-electricity conversion efficiency. In particular, the extract from Garcinia kola demonstrated better electrochemical and photovoltaic performance.
Article
Electrochemistry
Xiao Deng, Akihiro Okamoto
Summary: It has been found that soluble redox mediators play a major role in cellular electron transportation in sulfate-reducing bacteria. In this study, in vivo electrochemistry experiments showed that outer-membrane cytochromes directly mediate the extracellular electron transfer in Desulfovibrio ferrophilus IS5. The findings suggest that the direct electron transfer mechanism regulates the reduction rate of insoluble substrates in sulfate-reducing bacteria.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Gururaj Kudur Jayaprakash, B. E. Kumara Swamy, Shashanka Rajendrachari, S. C. Sharma, Roberto Flores-Moreno
Summary: Cationic surfactants increase the number of surface active electron transfer (ET) sites on the carbon paste electrode (CPE) surface. A dual descriptor approach is proposed to locate the redox-active sites of different surfactants in a single plot, avoiding the need to separately plot oxidation and reduction sites. Results indicate that cetylpyridinium significantly increases the maximum number of ET sites on the CPE surface compared to other surfactants.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Electrochemistry
Trent A. Weiss, Gang Fan, Bertrand J. Neyhouse, Evan B. Moore, Ariel Furst, Fikile R. Brushett
Summary: Redox flow batteries (RFBs) face challenges due to complex failure modes, such as membrane crossover, leading to reduced capacity and cycling efficiency. Redox-active oligomers (RAOs) are proposed as a solution, but their impact on flow cell performance is not well understood. This study shows that oligomeric derivatives of TEMPO have lower diffusivities but maintain good charge transfer characteristics. The variations in mass transport rates lead to differences in flow cell polarization and cycling performance.
BATTERIES & SUPERCAPS
(2023)
Article
Chemistry, Multidisciplinary
Kango Ishimoto, Tomoyuki Tajima, Hideaki Miyake, Masahiro Yamagami, Wataru Kurashige, Yuichi Negishi, Yutaka Takaguchi
CHEMICAL COMMUNICATIONS
(2018)
Article
Chemistry, Multidisciplinary
Noritake Murakami, Hideaki Miyake, Tomoyuki Tajima, Kakeru Nishikawa, Ryutaro Hirayama, Yutaka Takaguchi
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Article
Materials Science, Multidisciplinary
Tomoyuki Tajima, Haruko Goto, Masayasu Nishi, Takahiro Ohkubo, Yuta Nishina, Hideaki Miyake, Yutaka Takaguchi
MATERIALS CHEMISTRY AND PHYSICS
(2018)
Article
Polymer Science
Tomoyuki Tajima, Tomoaki Tanaka, Hideaki Miyake, Ill Yong Kim, Chikara Ohtsuki, Yutaka Takaguchi
Article
Chemistry, Multidisciplinary
Masahiro Yamagami, Tomoyuki Tajima, Kango Ishimoto, Hideaki Miyake, Hiroyuki Michiue, Yutaka Takaguchi
HETEROATOM CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Takumi Izawa, Vit Kalousek, Daiki Miyamoto, Noritake Murakami, Hideaki Miyake, Tomoyuki Tajima, Wataru Kurashige, Yuichi Negishi, Keita Ikeue, Takahiro Ohkubo, Yutaka Takaguchi
Article
Chemistry, Inorganic & Nuclear
Yutaka Takaguchi, Hideaki Miyake, Takumi Izawa, Daiki Miyamoto, Ryohei Sagawa, Tomoyuki Tajima
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
(2019)
Review
Biochemistry & Molecular Biology
Ning Wang, Marta Switalska, Li Wang, Elkhabiry Shaban, Md Imran Hossain, Ibrahim El Tantawy El Sayed, Joanna Wietrzyk, Tsutomu Inokuchi
Review
Chemistry, Organic
Hiroyuki Kawafuchi, Lijian Ma, Md Imran Hossain, Tsutomu Inokuchi
CURRENT ORGANIC CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Tomoyuki Tajima, Shogo Okabe, Yutaka Takaguchi
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2020)
Article
Physics, Applied
Tomoyuki Tajima, Masahiro Yamagami, Ryohei Sagawa, Hideaki Miyake, Yutaka Takaguchi
Summary: A water-dispersible dye@SWCNT/dendrimer hybrid was created by physically modifying dye-encapsulated single-walled carbon nanotubes. In the photocatalytic H-2 evolution reaction, photoinduced electron transfer occurs between the encapsulated dye molecule inside the SWCNT and an electron-relay molecule outside, ultimately leading to the reduction of H+ to generate H-2. Despite the possibility of energy migration or charge recombination, the process proceeds smoothly, achieving an external quantum yield of 8.5% under specific light irradiation.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Fumiaki Ono, Takumi Okihara, Noboru Osaka, Noriyuki Nagaoka, Yuji Kameoka, Akira Ishikawa, Hironari Ooki, Takumi Ito, Daisuke Todome, Shinya Uemoto, Mitsuaki Furutani, Tsutomu Inokuchi, Kenji Okada
Summary: Nitrogen/phosphorus-containing melamines were prepared as flame retardants and grafted onto lignocellulose nanofibers. The resulting materials showed improved flammability resistance and mechanical properties.
Article
Chemistry, Multidisciplinary
Tomoyuki Tajima, Rai Sanda, Katsuya Nishihara, Hitoshi Shirai, Yasuhiro Okuda, Akihiro Orita, Yutaka Takaguchi
Article
Chemistry, Multidisciplinary
Shunichi Nishimura, Tomoyuki Tajima, Tatsuki Hasegawa, Tomoaki Tanaka, Yutaka Takaguchi, Yuya Oaki, Hiroaki Imai
CANADIAN JOURNAL OF CHEMISTRY
(2017)
Article
Chemistry, Multidisciplinary
Tomoyuki Tajima, Shoko Yamamoto, Yuta Sakamoto, Shoji Takagi, Toshitaka Nakaya, Yutaka Takaguchi, Asako Igashira-Kamiyama, Nobuto Yoshinari, Takumi Konno
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2017)
Article
Chemistry, Organic
Fuying Zhu, Yamei Lin
Summary: In this study, a low-metal iron-supported catalyst (Fe20/NC-Mg) was reported for the efficient synthesis of quinoxaline compounds, using water as a solvent and without additional bases. The synergistic effect of FeNx site and Mg (OH)2 nanorods in the catalyst played a key role in achieving high yields (82-91%) in 16 examples. The gram-level synthesis and reusability of the catalysts after four cycles demonstrated its industrial application potential.
Article
Chemistry, Organic
Mikhail Kozlov, Alexey Tyurin, Andrey Dmitrenok, Vyacheslav Rusak, Aleksander Fedorov, Igor Zavarzin, Yulia Volkova
Summary: This study presents a novel and practical synthesis method for phosphorus-substituted 1,3,4-thiadiazolines using phosphorylthioformic acid hydrazides and ketones. The protocol demonstrates operational simplicity, availability of reagents, and tolerance towards different functional groups.
Article
Chemistry, Organic
Jisna Jose, Thomas Mathew
Summary: 2-Cyclopentenone and its derivatives are highly esteemed synthetic intermediates with exceptional utility in organic synthesis. They are favored structural motifs in numerous pharmaceutical drugs and natural products, highlighting their significance. The review discusses the various methods used to synthesize cyclopentenones from 2016 to 2023.
