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
of ten 5-formazanyl copper(II) complexes in toluene solutions have been observed at room temperature and at that of liquidnitrogen. The ESR(g⁄⁄ and A⁄⁄) and bonding(α2) parameters of the copper ion were greatly affected by substituting several groups at the ortho position of 1-phenyl ring of formazan. Based on these results, the complexes are classified into three groups: Group I, in which A⁄⁄\simeq0
已在室温和液氮下观察到十种 5-甲脒基铜 (II) 配合物在甲苯溶液中的电子自旋共振 (ESR) 光谱。通过在甲臜的1-苯环邻位上取代几个基团,铜离子的ESR(g⁄⁄和A⁄⁄)和键合(α2)参数受到很大影响。基于这些结果,复合物被分为三组:第一组,其中 A⁄⁄\simeq0.012–0.013 cm-1 和 α2\simeq0.5;第 II 组,其中 A⁄⁄\simeq0.017 cm-1 和 α2\simeq0.7,以及第 III 组,其中两个铜离子相互作用。很明显,它们与先前研究的三种含铜蛋白质很好地对应。
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.
Balakrishnan, R.; Srinivasan, V. S.; Venkatasubramanian, N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 5, p. 404 - 406
作者:Balakrishnan, R.、Srinivasan, V. S.、Venkatasubramanian, N.