Article
Chemistry, Analytical
Zhengting Zhang, Guiyun Yi, Peng Li, Xikui Wang, Xiaodong Wang, Chuanxiang Zhang, Yulong Zhang, Qi Sun
Summary: The research utilized Eu-doped PbO2 electrodes for electrochemical oxidation of hydroquinone, showing that the doped electrodes had higher stability and promoted electrocatalytic activity, making them potentially applicable for removal of refractory organic contaminants from wastewater.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Zhengting Zhang, Guiyun Yi, Peng Li, Xikui Wang, Xiaodong Wang, Chuanxiang Zhang, Yulong Zhang, Qi Sun
Summary: A novel Eu/GO/PbO2 composite anode with excellent electrocatalytic performance towards the degradation of hydroquinone was prepared by co-electrodeposition method. The Eu/GO/PbO2 electrode exhibited longer service lifetime, higher oxygen evolution potential, and lower charge transfer resistance compared to GO/PbO2 and pure PbO2 electrode.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Organic
Avisikta Sinha, Mangalampalli Ravikanth
Summary: A new type of dithiasapphyrins embedded with phenothiazine was discovered, and the versatility of these compounds was demonstrated through the synthesis of various derivatives with different substituents. The structure of the macrocycles was confirmed using multiple techniques, and it was found that the double N-C-fused dithiasapphyrins were more stable than the nonfused phenothiazine-embedded dithiasapphyrin. The macrocycles exhibited nonaromaticity, as confirmed by NMR, absorption, and DFT studies. The absorption spectra showed shifts to the NIR region after protonation. Electrochemical studies confirmed the electron-rich nature of the macrocycles, consistent with the theoretical predictions.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Iain A. A. Wright, Marc K. K. Etherington, Andrei S. S. Batsanov, Andrew P. P. Monkman, Martin R. R. Bryce
Summary: Heterocyclic dimers composed of butterfly-shaped phenothiazine and its oxidized form have been synthesized and studied. The presence of certain substituents induces a twist in the dimers. Various analytical techniques, including X-ray crystallography and optical spectroscopy, have been used to understand the relationship between oxidation state, conformational restriction, and emission mechanisms. The mixed dimer exhibits both thermally activated delayed fluorescence and room temperature phosphorescence.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Applied
Viyana Movahed, Leila Arshadi, Mehrnaz Ghanavati, Ehsan Mahdavi Nejad, Zahra Mohagheghzadeh, Mosayeb Rezaei
Summary: A sensing layer containing ZnO@MnO2-rGO nanocomposite was used to modify a glassy carbon electrode for monitoring some antioxidant molecules. The resulting nanocomposite-modified electrode exhibited significant electrocatalytic activities, with low detection limits and satisfactory analytical performance.
Article
Chemistry, Multidisciplinary
Indresh Singh Yadav, Rajneesh Misra
Summary: A set of pi-conjugated push-pull chromophores based on phenothiazine and phenothiazine-5,5-dioxide were designed and synthesized. The photophysical, thermal stability, and redox properties were explored by introducing different substituents.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Chenglong Feng, Xin Liu, Yuanbin She, Zhenlu Shen, Meichao Li
Summary: A facile and elegant method for the synthesis of novel N-aryl phenothiazine derivatives from 2-phenylindolizines and phenothiazines has been developed through direct electrochemical oxidation. This method could be smoothly performed without the need for external oxidant and catalyst at room temperature. Cyclic voltammetry and in situ FTIR techniques were utilized to analyze the cross-coupling process, aiding in the determination of appropriate reaction potential. Under optimized conditions, a wide range of substrates were successfully converted to the desired products with moderate to excellent isolated yields (up to 91%) and high regioselectivity. A plausible mechanism involving a radical pathway has been proposed.
CHINESE CHEMICAL LETTERS
(2023)
Article
Electrochemistry
Niloofar Mohamadighader, Davood Nematollahi, Mahnaz Saraei
Summary: Electrochemical oxidation of phenothiazine in an acetonitrile/water mixture was investigated, revealing that the oxidation pathway varies with respect to pH. The results led to the synthesis of two new types of PTZ dimer and provided insights into the oxidation mechanism of PTZ.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Keerakit Kaewket, Chanpen Karuwan, Somchai Sonsupap, Santi Maensiri, Kamonwad Ngamchuea
Summary: In this study, carbon nanofibers (CNF) were synthesized by electrospinning and their anti-fouling properties were demonstrated. The synthesized CNF was characterized using various techniques, and different electrode preparation methods were tested. The electrochemical behaviors of CNF towards various systems were explored, highlighting the material's potential applications.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Andrey Kislyi, Ilya Moroz, Vera Guliaeva, Yuri Prokhorov, Anastasiia Klevtsova, Semyon Mareev
Summary: Anodes based on substoichiometric titanium oxide (Ti4O7), especially in the form of reactive electrochemical membranes (REMs) with large pore sizes (0.5-2 mm), have been proven to be highly efficient in the anodic oxidation of organic pollutants in aqueous solutions. In this study, a Ti4O7 particle anode with a granule size of 1-3 mm and forming pores of 0.2-1 mm was used for the oxidation of various organic acids and hydroquinone in aqueous solutions, achieving a high instantaneous current efficiency (ICE) of about 40% and a high removal degree of more than 99% even after 108 operating hours at 36 mA/cm².
Article
Polymer Science
Gizem Kaya, Baris Kiskan, Recep Isci, Mehmet S. Eroglu, Turan Ozturk, Yusuf Yagci
Summary: The study presents a novel strategy for fabricating electro-responsive polybenzoxazine based high-performance thermoset surfaces. Three structurally different benzoxazines were coated as thin films on ITO electrodes and cured by thermal activation. Structural characteristics, thermal behavior, electrochemical properties, and surface properties were evaluated using various techniques. This work demonstrates a straightforward electrochemical method for tuning surface morphology and hydrophilicity through redox processes and hydrogen bonding interactions.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Electrochemistry
Sojin Park, Seongjun Hong, Suseong Kim, Jae Hyuk Choi, Su Jin Kang, Jeongyeon Choi, Yeonho Chung, Hakhyun Nam, Yang-Rae Kim
Summary: Two phenothiazine derivatives were synthesized as new redox mediators and compared with conventional mediators. Cyclic voltammetry experiments were performed to investigate the reaction mechanism, reversibility, and stability of the mediators. The number of electrons and protons involved in the redox processes was estimated, and thermodynamic parameters were evaluated based on the electrochemical behavior. The performance of the mediators in the oxidation of reduced nicotinamide adenine dinucleotide was also analyzed, confirming their similarity or superiority to other mediators.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Electrical & Electronic
Cheng Wang, Rui Wu, Hao Ling, Zhiling Zhao, Wenjia Han, Xiaowen Shi, Gregory F. Payne, Xiaohui Wang
Summary: This study reports a composite paper electrode fabricated through designed papermaking that offers sensitive and selective chemical detection. The composite paper can be electrochemically reduced under relatively mild conditions, enhancing its electrocatalytic properties. Compared to traditional surface modification methods, this composite paper electrode exhibits comparable or even better sensing performance.
NPJ FLEXIBLE ELECTRONICS
(2022)
Article
Chemistry, Analytical
Archana Chaudhary, Mohd Quasim Khan, Rais Ahmad Khan, Ali Alsalme, Khursheed Ahmad, Haekyoung Kim
Summary: This study successfully synthesized CeO2 nanoparticles through a facile method and applied them for the modification of an electrode for hydroquinone detection. The modified CeO2/GCE electrode exhibited good detection limit, sensitivity, and stability, as well as good selectivity and repeatability for the determination of hydroquinone.
Article
Chemistry, Physical
Vincent Ball, Maria Laura Alfieri, Kevin Ziegler, Youri Arntz, Marco d'Ischia
Summary: The deposition efficiency and electrochemical properties of coatings obtained from different benzenediols were compared. Resorcinol showed higher deposition efficiency compared to catechol, while hydroquinone did not form detectable coating. Catechol and hydroquinone exhibited reversible electrochemical properties, while resorcinol displayed an irreversible process. The results provide insights for future studies on coating design and tailoring.
SURFACES AND INTERFACES
(2022)
