Triarylverdazyl radicals as promising redox-active components of rechargeable organic batteries
作者:S. G. Kostryukov、O. Yu. Chernyaeva、B. S. Tanaseichuk、A. Sh. Kozlov、M. K. Pryanichnikova、A. A. Burtasov
DOI:10.1007/s11172-020-2905-5
日期:2020.7
verdazyl radicals bearing various substituents is proposed. 3-Positioned aromaticsubstituents at the verdazyl moiety affect the reduction potentials and almost do not affect the oxidation potential, while 1-positioned aromaticsubstituents affect contrariwise the oxidation potential of this radical without any influence on the reduction potential. The acquired electrochemical data allowed us to reveal the
Microwave mediated solvent free synthesis of formazans catalyzed by simple ionic liquids derived from dialkylammonium salts
作者:Pranab Jyoti Das、Jesmin Begum
DOI:10.1039/c5ra06363a
日期:——
Microwave assisted solvent free one pot synthesis of formazans, catalysed by ionic liquid is reported for the first time.
首次报道了离子液体催化的微波辅助无溶剂一锅法合成甲醛胺。
Nano BF3·SiO2: A green heterogeneous solid acid for synthesis of formazan dyes under solvent-free condition
作者:Abdolhamid Bamoniri、Bi Bi Fatemeh Mirjalili、Naimeh Moshtael-Arani
DOI:10.1016/j.molcata.2014.06.024
日期:2014.11
A solvent-free, efficient and rapid approach for synthesis of formazan dyes was developed by diazotization of aromatic amines with NaNO2, nano silica-supported borontrifluoride (nano BF3·SiO2), then diazo coupling with aldehyde phenylhydrazones by grinding method at room temperature. This study aimed to overcome the limitations and drawbacks of the previous reported methods such as: low temperature
BF<sub>3</sub>-Functionalized Silica-Coated Magnetic Nanoparticles as a Novel Heterogeneous Solid Acid for Synthesis of Formazan Derivatives via a Green Protocol
作者:Abdolhamid Bamoniri、Naimeh Moshtael-Arani
DOI:10.1246/bcsj.20140298
日期:2015.5.15
A new type of green heterogeneous solid acid was prepared by the immobilization of BF3·Et2O on the surface of Fe3O4@SiO2 core–shell nanocomposite (Fe3O4@SiO2–BF3) and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), field emission scanning electron microscope (FE-SEM), energy-dispersive X-ray (EDS), and transmission electron microscope (TEM). The activity of this super solid acid was probed through the synthesis of aryl diazonium salts as the starting reactant and then, their diazo coupling with aldehyde phenylhydrazones for formation of formazan derivatives in a solvent-free medium at room temperature. This clean and environmentally benign methodology has advantages such as: no need for corrosive and toxic liquid acids, solvents, or buffer solutions, room temperature reaction, high yields, and short reaction times. In addition, long-term stability of aryl diazonium salts supported on the surface of Fe3O4@SiO2–BF3 magnetic nanoparticles (MNPs) at room temperature was one of the most important results of this procedure.