Use of aqueous glycerol as a green reaction medium to synthesis zinc glycerolate and corresponding ZnO micro-flowers and development of amperometric binder-free chemical sensor are described to detect p-nitrophenol.
Mono and binuclear Ag(I), Cu(II), Zn(II) and Hg(II) complexes of a new azo-azomethine as ligand: Synthesis, potentiometric, spectral and thermal studies
作者:Ibrahim S. Ahmed、Moustafa M. Moustafa、Mohamed. M. Abd El Aziz
DOI:10.1016/j.saa.2011.01.022
日期:2011.5
UV-Vis-spectra. The proton dissociation constants of the ligands and the stability constant of their complexes have been determined potentiometrically in 40% (v/v) alcohol-water medium as well as the stoichiometry of complexes were determined conductometrically. The data reveal that the stoichiometries for all complexes were prepared in molar ratios (1:1) and (1:2) (M:L). The electrolytic and nonelectrolytic
Direct oxidativecoupling of alcohols and amines is regarded as an effective and green approach for imine synthesis under mild conditions. In this work, Zn-doped γ-Al2O3 supported Au nanoparticles was demonstrated as highly active and selective heterogeneous catalyst for a series of imine productions with good to excellent yields, from alcohols and amines via direct oxidativecoupling under air atmosphere
醇和胺的直接氧化偶合被认为是在温和条件下合成亚胺的有效且绿色的方法。在这项工作中,锌掺杂的γ-Al 2 ö 3支持的Au纳米颗粒被证明为没有额外的空气气氛下,高活性和选择性的非均相催化剂进行一系列具有良好到优异的产率亚胺制作的,从通过直接氧化偶合醇和胺基础添加剂。研究了各种物理化学技术,包括ICP-MS,XRD,N 2物理吸附,TEM,XPS和CO 2- / NH 3 -TPD。分散良好的Au 0纳米粒子的平均大小约为 在反应性胺的存在下,发现2.9nm对活化醇非常有效。Zn 2+掺杂剂的量和催化剂制备过程中载体的煅烧温度显示出对调节苄醇氧化为苯甲醛的内在活性(即模型反应的速率确定步骤)的关键影响,据报道这是与活性表面氧种类和载体的酸碱性有关。在400°C下煅烧的0.4%Au / Zn 0.02 Al 2 O 3催化剂表现出最高的TOF(39.1 h -1)在60°C的条件下,在所有已报道的金基催化剂中,对亚苄基苯胺的收率均>
A new supramolecular isomer of p-aminobenzoate Zn(II) coordination polymer: Structure and photoluminescent property
作者:Manuela E. Crisan、Anastasia Gorobet、Anatolii V. Siminel、Paulina N. Bourosh、Lilia Croitor
DOI:10.1016/j.poly.2019.07.042
日期:2019.10
investigation shows that pABA anions bind the metal atoms in 1 and IWORET through the amine nitrogen and the carbonyl oxygen in a double-stranded bridge fashion giving rise a 1Dcoordination chain (1) and 2D layer (IWORET). In YIWDEO isomer, pABA− presents two different coordination modes (monodentate and bridging bidentate) extending the structure to 1Dcoordinationpolymer. The new solid reveals blue-violet
Nano-Azo Ligand and Its Superhydrophobic Complexes: Synthesis, Characterization, DFT, Contact Angle, Molecular Docking, and Antimicrobial Studies
作者:Gehad G. Mohamed、Walaa H. Mahmoud、Ahmed M. Refaat
DOI:10.1155/2020/6382037
日期:2020.10.16
measurements. The IRspectra revealed the binding of the azo ligand to the metal ions via two azo nitrogen atoms and protonated carboxylate O in a neutral tetradentate manner. Both IR and 1H NMR spectra documented the involvement of the carboxylate group without proton displacement. The thermal studies pointed out that the complexes had higher thermal stability comparable with that of the free ligand. SEM images