Article
Materials Science, Multidisciplinary
Ying Zhang, Jason Witman, Sebastien Dryepondt
Summary: This paper investigates the performance of NiCoCrAlX (where X = Y, Ta, Hf, and/or Si) coatings fabricated by electrolytic codeposition process under high-temperature oxidation conditions. The experimental results show that the coatings with Hf and Si additions exhibit better oxidation resistance, while the addition of Ta does not improve the performance.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2022)
Review
Chemistry, Organic
Aaron D. G. Campbell, Roly J. Armstrong
Summary: Atropisomeric molecules, which have restricted rotation between cyclic fragments, are important in catalysis, materials science, and medicines. C-N atropisomeric molecules have emerged as an important class of stereogenic molecules, and this review discusses their configurational stability, synthesis history, and state-of-the-art catalytic asymmetric strategies for accessing various C-N atropisomers.
SYNTHESIS-STUTTGART
(2023)
Article
Engineering, Chemical
Jiancheng Shu, Yuhao Wu, Yaling Deng, Tianya Lei, Jinfeng Huang, Yunhui Han, Xingran Zhang, Zhisheng Zhao, Yifan Wei, Mengjun Chen
Summary: A new combination method for Mn2+ and NH4+-N removal from EMMR using washing and electrolytic oxidation processes has been studied in this research. The study found that under specific conditions, including a current density of 35 mA/cm(2), a sodium hypochlorite dosage of 2%, and a reaction time of 2 hours at 20 degrees Celsius, the concentrations of NH4+-N and Mn2+ were lower than the specified wastewater discharge standard. The main forms of Mn2+ removal were MnO2, Mn2O3, MnOOH, and Mn3O4, while NH4+-N was mainly oxidized to N-2.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Chemistry, Multidisciplinary
Soumya Sikdar, Pramod Menezes, Raven Maccione, Timo Jacob, Pradeep L. Menezes
Summary: Plasma electrolytic oxidation (PEO) is a novel surface treatment process used to produce thick, dense metal oxide coatings on light metals to improve their wear and corrosion resistance. The PEO process is widely employed in mechanical, petrochemical, and biomedical industries due to its superior characteristics. Recently, PEO process has also been utilized to produce nanocomposite coatings, showing promising developments in this field.
Article
Chemistry, Inorganic & Nuclear
Yamato Omatsu, Yoshiyuki Mizuhata, Norihiro Tokitoh
Summary: Novel cyclic oligosilanes with trimethylsilylmethyl and aryl groups at each silicon ring atom were synthesized. The study revealed that the use of different aryl groups significantly affected the ring size and stereoisomers of the cyclic oligosilanes, allowing for separation and identification. Additionally, the reactions yielded the sole stereoisomer products.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Hao Li, Christina Susan Abraham, Megha Anand, Ang Cao, Jens K. Norskov
Summary: This study reveals the potential of electrolytic propylene oxidation for synthesizing propylene oxide through methods such as density functional theory. The research shows that propylene epoxidation is facile on weak-binding catalysts if reactive atomic oxygen preexists, and electrolytic epoxidation can provide atomic oxygen without overwhelming the epoxidation process with hydroperoxyl formation. Additionally, propylene dehydrogenation competes with the epoxidation process and may lead to the formation of side products.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Coatings & Films
K. A. Cosan, K. O. Gunduz, M. Tarakci, Y. Gencer
Summary: This study investigates the effect of nickel addition on the plasma electrolytic oxidation (PEO) behavior of pure aluminum. The results show that the increase of nickel content leads to the coarsening of eutectic Al3Ni precipitates, which adversely affects the coatings produced.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Shannon Heinrich, Hila Benhaim, Maxwell Mattejat, Daniel Pan, Sydney Dimarco, Guang Wu, Gabriel Menard
Summary: This article reports the synthesis and characterization of a series of new, tunable phosphine oxide ligands, derivatives of a previously reported uranyl capture agent. The effects of electron-withdrawing and electron-donating groups on the properties of the ligands were studied using electrochemical methods, and their extraction and back-extraction abilities for uranyl were investigated. The results showed that the substituents on the ligands significantly influenced their coordination properties.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Kun Yu, Ping Li, Qi Han, Qiang Wang, Sergey A. A. Karpushenkov, Xiaopeng Lu, Oleg V. Ignatenko
Summary: The effect of silver particles on the antibacterial property, degradation process, and cytocompatibility of plasma electrolytic oxidation coatings on magnesium surface was investigated. The results showed that the incorporated silver particles provided effective antibacterial property and had good cytocompatibility with MC3T3-E1 cells.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Katarzyna Lesniak-Ziolkowska, Kasjana Brodacz, Dorota Babilas, Mateusz Dulski, Agata Blacha-Grzechnik, Xiaopeng Lu, Alicja Kazek-Kesik, Wojciech Simka
Summary: This study investigated the surface modification of titanium using a plasma electrolytic oxidation (PEO) process with different Mg-containing additives. The results showed that porous oxide layers were formed on the titanium surface, increasing the roughness. The presence of bioactive Ca, P, and bacteriostatic Mg in the oxide layer was confirmed. The PEO coatings exhibited bacteriostatic and fungistatic properties, making them potential implant materials for bone tissue.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Zilin Chen, Xu Liu, Zhe Cheng, Xiaodong Tan, Yunjie Xiang, Jing Li, Yongping Zhang, Zhisong Lu, En-Tang Kang, Liqun Xu, Xi Rao
Summary: A ZnO/Zn(OH)(2) hybrid coating was fabricated on pure Zn surface through plasma electrolytic oxidation (PEO) to investigate the effect of PEO treatment on the degradation behavior of Zn and Zn-based materials. The degradation effects were studied through immersion tests in simulated body fluid (SBF) and Hank's solution. The results showed that PEO treatment accelerates the degradation of Zn and the corrosion products mainly consist of Zn(OH)(2), ZnO, Zn-3(PO4)(2), and Ca-P matters. PEO-treated Zn exhibited good in vitro biocompatibility and enhanced antibacterial properties, making it promising for orthopedic implants.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Physical
Marta Wala, Dorota Lubiarz, Natalia Waloszczyk, Wojciech Simka
Summary: The research presents a simple method for preparing black TiO2 coatings doped with Cu or Ni using the plasma electrolytic oxidation process, which can serve as anodes in urea-fueled fuel cells. The results demonstrate the electrocatalytic properties of the TiO2-based doped materials towards urea electrooxidation, with Cu-enhanced TiO2 showing activity for urea oxidation at a maximum current density of 130 mu A cm(-2) and Ni-enhanced TiO2 requiring only 0.742 V for a current density of 50 mu A cm(-2).
Article
Engineering, Mechanical
Gerosa Riccardo, Barbara Rivolta, Carlo Gorla, Franco Concli
Summary: The present experimental work investigated the isothermal low cycle fatigue resistance of two well-known tool steels, AISI H11 and AISI H13, at different temperatures. It was found that at 550 degrees C fatigue and oxidation are the main driving mechanisms, with multiple crack nucleation observed at high temperatures.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Chemistry, Physical
Anqi Wu, Beibei Han, Yan Yao, Yang Zhang, Yafei Tang, Svenja Hanson, Jing Wang, Wanbing Guan, Subhash C. Singhal
Summary: The influences of factors on the performance and degradation of a flat-tube solid oxide electrolytic cell stack (SOEC stack) for CO2/H2O co-electrolysis under intermittent pulsed current were investigated. By inserting a voltage lead inside the stack, variations in cell and stack voltages were monitored during the electrolysis process. The study found that the average voltage degradation rate after 64 cycles was about 0.018%/cycle at a current density of 50-250 mA/cm2, and the expected useful life was more than 1100 cycles (10,000 hours). Microstructural analysis revealed the formation of a SrCrO4 barrier layer on the contact surface between the metal interconnect and the current collecting layer, leading to interface resistance and electrolytic performance degradation. This research provides valuable information for improving the stability of SOEC stack for CO2/H2O co-electrolysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Ceramics
Xinxin Zhang, You Lv, Yupeng Zhang, Zehua Dong
Summary: In this work, plasma electrolytic oxidation (PEO) was creatively introduced to fabricate multi-layered nanospheres, with the inner layer containing Zn, Ca and P, middle layer containing Cu and P, and outer layer enriched in Cu, O and Ti. This novel method provides a new approach for preparing hierarchical structures in various fields.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Organic
Dilek Isik Tasgin, Irem Bayraktar
Summary: We present a synthetic method for pyrrolizine-3-one derivatives and investigate their photophysical properties. These compounds are prepared through a series of reactions involving substituted pyrroles in one-pot, two-step oxidation, and intramolecular cyclization processes. The photophysical properties of the synthesized compounds are studied using UV-Vis and fluorescence spectroscopy in various solvents. The introduction of pyrrolyl substituents has a significant impact on Stokes shifts and quantum yield values.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Satish Kumar Burra, Vaikunta Rao Lakinani, Raghunadh Akula, Chiranjeevi Yankkanti
Summary: A novel and green strategy for the construction of biologically relevant substituted indolyl-4H-chromenes scaffolds is reported, using L-proline as a catalyst and water as a promoter solvent. This catalytic system offers wider applicability, shorter reaction times, and high yields, making it an ideal condition for green chemistry.
SYNTHETIC COMMUNICATIONS
(2024)
Review
Chemistry, Organic
Abouelhaoul El Alami, Amine El Maraghi, Fatima Youssoufi, Assiya Atif, Hamid Sdassi
Summary: Nitrobenzimidazoles have become increasingly important in the design of new compounds in medicinal, therapeutic and chemical fields. This review provides an overview of the synthesis strategies and biological activities of nitrobenzimidazole derivatives.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Nilesh Raghunath Khedkar, Alex Joseph, Milind Sindkhedkar
Summary: In this study, a new library of 3-(2-(pyrimidin-5-yl)thiazol-4-yl)-1,2,4-oxadiazole compounds was designed and synthesized as potential anticancer agents using in silico fragment-based drug design. The compounds were tested for their anticancer activity in vitro, and one compound exhibited excellent activity against multiple cancer cell lines.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Terungwa H. Iorkula, Bryce A. Tolman, Scott R. Burt, Matt A. Peterson
Summary: A new method for synthesizing C-6 substituted products has been discovered in this study, which utilizes lower doses of fluoride and CsF as a catalyst, with high reaction yields and cost-effectiveness under suitable conditions.
SYNTHETIC COMMUNICATIONS
(2024)
Review
Chemistry, Organic
Ranjana Aggarwal, Swati Sharma
Summary: This review article mainly focuses on the synthesis of 3(5)-trifluoromethylpyrazoles via condensation reaction of trifluoromethyl-beta-diketones with hydrazines. It emphasizes the importance of fluorine-containing compounds and pyrazoles in the field of biology. The literature reported condensation reactions of trifluoromethyl-beta-diketones with hydrazines are covered.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
F. M. Alshareef, Sami A. Al-Harbi, Esam S. Allehyani, Omeima Abdullah, Magdy A. Ibrahim
Summary: This study aimed to construct a novel category of linear annulated chromeno[3',2':5,6]pyrido[2,3-d][1,3]thiazolo[3,2-a]pyrimidines. The chemical reactivity of the synthesized compounds was investigated, and they showed significant antimicrobial activity against various strains.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Preethi Dhanapal, S. L. Manju
Summary: Thiazole based Schiff base scaffolds have become an integral part of drug development in recent years, playing a versatile role as building blocks for lead drug molecules. This study presents a facile one pot synthetic method for producing novel 4-aryl thiazoles with high yield, shorter reaction time, and milder conditions, without the need for catalysts or purification techniques.
SYNTHETIC COMMUNICATIONS
(2024)
