Results 31 to 40 of about 23,580 (267)

Strategy for Contiguous Tetramination of Cyclohexanones with o-Phenylenediamines with Elemental Sulfur and DMSO.

Organic Letters, 2019
The S8/DMSO combination was found to be an excellent oxidizing agent for ipso,α,β,γ-tetramination of cyclohexanones with two molecules of o-phenylenediamines in the presence of TFA as a catalyst.
T. Nguyen, L. A. Nguyen, P. Retailleau
semanticscholar   +1 more source

p-Phenylenediamines and p-phenylenediamine quinone derivatives in rubber consumer products and typical urban dust: Sources, transformation profiles, and health risks.

Environment International
N,N'-Substituted p-phenylenediamines (PPDs) are widely used as antioxidants in the rubber industry and are released into the environment in large quantities during the production and use of rubber products. We quantified PPDs and PPD quinone derivatives (
Tian-Mi Mao, Wenbin Liu, Jinglin Deng, Chunci Chen, Tianqi Jia, Haifeng Li, Fei Yin   +6 more
semanticscholar   +1 more source

Proton‐Switching Regulates Interfacial Iodine Chemistry for Long‐Life Zinc–Iodine Batteries

Angewandte Chemie, EarlyView.
A proton‐switchable imine‐linked framework is developed to dynamically regulate interfacial iodine chemistry in aqueous Zn–I2 batteries, where reversible protonation/deprotonation switches the host affinity between iodide and polyiodide species. This state‐dependent regulation suppresses shuttle‐induced side reactions while preserving fast iodine redox
Feifei Wang, Guoqin Liu, Yuhang Zhuang, Peng Zhang, Zhengwei Li, Songshan Bi, Ahmad Bagheri, Angelika Wrzesińska‐Lashkova, Neda Kargarfard, Peyman Rostami, Yana Vaynzof, Bernd Plietker, Mingchao Wang, Ali Shaygan Nia, Xinliang Feng   +14 more
wiley   +2 more sources

Phenylenediamines and quinone derivatives: analytical advances

Reviews in Analytical Chemistry
Phenylenediamines (PDs) and their N,N′-substituted derivatives (PPDs) are widely used antiozonants in rubber and polymer manufacturing, with significant release into the environment via tire wear particles.
Lucarini Fiorella, Staedler Davide
doaj   +1 more source

Kaolin-SO3H nanoparticles: A new efficient and reusable catalyst for synthesis of 2-substituted benzimidazoles at room temperature [PDF]

Journal of Nanostructures, 2019
Kaolinite clay found its application in medicine, in toothpaste, in cosmetic and as a food additive. Recently, a specially formulated spray is used in fruit and vegetable production to repel the insects and prevent sunburn. Kaolin-SO3H nanoparticles were
Abdolhamid Bamoniri, Bi Bi Fatemeh Mirjalili, Nahid Yaghmaeiyan-Mahabadi   +2 more
doaj   +1 more source

Recent Developments in Energy Storage and Conversion Applications of Multifunctional Vanadium Carbides

Advanced Materials Technologies, EarlyView.
This review systematically explains the synthesis, properties, and energy storage and conversion applications of vanadium carbides. We introduce the structural and the synthetic strategies and reviewed recent developments in the material synthesis processes. The emerging applications of vanadium carbides in energy storage and conversion are highlighted.
Swathy B. Saseendran, Sang Mun Jeong, Chandra Sekhar Rout   +2 more
wiley   +1 more source

Crosslinking of Linear Polyimines Into Aminal‐Linked Porous Organic Polymers for C2 Hydrocarbon/Methane Separation

Angewandte Chemie, EarlyView.
Crosslinking of linear polyimines with aromatic diamines via nucleophilic addition converts nonporous polyimine precursors into aminal‐linked porous networks, offering a new strategy for synthesizing porous organic polymers. The resulting materials exhibit high C2 hydrocarbon adsorption capacity, excellent selectivity over CH4, and durable cyclic ...
Xuejie Li, Yayu Yan, Qiaohong Li, Michelle Åhlén, Chao Xu   +4 more
wiley   +2 more sources

Self-Propelled Micromotors for Naked-Eye Detection of Phenylenediamines Isomers.

Analytical Chemistry, 2018
Tubular micromotors composed of a hybrid single-wall carbon nanotube (SW)-Fe2O3 outer layer and powered by a MnO2 catalyst are used for phenylenediamines isomers detection and discrimination.
R. María-Hormigos, Beatriz Jurado‐Sánchez, A. Escarpa   +2 more
semanticscholar   +1 more source

Tailoring Multifunctional Carbon Dots via Precursor Stoichiometry: Switching Between Solid‐State Fluorescence and Broadband Absorption Through Aggregation Control

Advanced Science, EarlyView.
Precursor stoichiometry programs the surface chemistry of carbon dots, directing their self‐assembly into distinct aggregation modes. Aldehyde‐enriched surfaces form ordered, hydrogen‐bonded assemblies that enable bright red solid‐state fluorescence, whereas amine‐rich surfaces promote compact π–π stacked aggregates with broadband visible‐light ...
Gaixia Yang, Hao Sun, Defa Hou, Fulin Yang, Yuan Zou, Bei Zhou, Lanxiang Liu, Xu Lin, Guanben Du   +8 more
wiley   +1 more source

A Multi‐Stimuli Transformational Network of Benzil‐Based Pd(II) Assemblies

Angewandte Chemie, EarlyView.
Incorporation of a flexible and chemically reactive benzil backbone into the ligand structure allows it to access multiple conformations, enabling the formation of diverse homo‐ and heteroleptic Pd(II) assemblies with different nuclearities and topologies.
Zhiwei Zeng, A. Priscila Gia, Alexander S. Mikherdov, Mert Acar, Björn Schmidt, Guido H. Clever   +5 more
wiley   +2 more sources