已经开发了用吡啶羧酸(烟碱和吡啶甲酸)电化学合成铜 (II) 和锌 (II) 配位化合物的新方法。所得化合物通过定量分析和红外光谱进行表征。通过DFT量子化学方法计算合成化合物的振动频率,并在此基础上解释实验红外光谱。发现吡啶羧酸根离子在所有情况下都在氮原子和羧酸根基团上配位,然而,在烟酸的情况下,这导致形成配位聚合物,而对于吡啶甲酸,形成单核配合物是典型的。
Raman spectra of copper, cobalt, and nickel complexes of nicotinic acid: Equilibrium studies
作者:A. E. Fazary、M. Z. Bani-Fwazz、K. F. Fawy、T. Sahlabji、N. S. Awwad、H. S. M. Abd-Rabboh
DOI:10.4314/bcse.v32i3.5
日期:——
summarizes the protonation and complexationequilibrium constants of nicotinic acid (NA) using different analytical techniques and software’s. Additionally, Raman, IR, and NMR spectra were done for nicotinic acidligand and for its solid complexes with copper(II), cobalt(II) and nickel(II) metal ions. KEY WORDS : Nicotinic acid, Potentiometry, Spectrometry, Equilibrium constants Bull. Chem. Soc. Ethiop
Environmentally friendly synthesis of flexible MOFs M(NA)<sub>2</sub>(M = Zn, Co, Cu, Cd) with large and regenerable ammonia capacity
作者:Yang Chen、Bohan Shan、Chengyin Yang、Jiangfeng Yang、Jinping Li、Bin Mu
DOI:10.1039/c8ta02845a
日期:——
efficient synthesis methods, NH3-assisted synthesis and solvent-evaporated conversion, have been developed for the synthesis of a series of M(NA)2 (M = Zn, Co, Cu, Cd; NA = nicotinate) flexible MOFs. The two-dimensional M(NA)2 (M = Zn, Co) and three-dimensional M(NA)2 (M = Cu, Cd) materials exhibit peculiar structural transformation. These frameworks can be obtained from dehydration of M(NA)2(H2O)4 (M
已开发出两种环保,高效的合成方法,NH 3辅助合成和溶剂蒸发转化,用于合成一系列柔性的M(NA)2(M = Zn,Co,Cu,Cd; NA =烟酸酯)财政部。二维M(NA)2(M = Zn,Co)和三维M(NA)2(M = Cu,Cd)材料表现出特殊的结构转变。这些骨架可以通过M(NA)2(H 2 O)4(M = Zn,Co,Cu,Cd)的脱水获得,M(NA)2(H 2 O)4是零维超分子结构。有趣的是,M(NA)2的结构转变(M = Zn,Co,Cd)在液态水吸附后是可逆的。由于这些MOF的柔性结构,它们表现出异常的NH 3吸附特性。二维Zn(NA)2显示了NH 3吸附的开门行为。在第一循环中,其层在0.22bar的压力下打开,导致两步吸收NH 3,在1bar下的容量为10.2mmol g -1。闸门打开压力随周期变化到一个较低的值。Co(NA)2具有17.5 mmol g -1的大量NH
Synthesis, spectral properties, crystal structures and antimicrobial effects of copper(II) pyridinecarboxylate adducts with chelating ligands
The reaction of an ethanolic solution of copper(II) pyridinecarboxylates CuX2. nH(2)O (where X is nicotinate (nic) (n = 0) or isonicotinate (isonic) (n = 4)) with ethylenediamine ten) in a molar ratio of 1:2 lead to the isolation of solid tetragonally distorted octahedral complexes of the type [Cu(en)(2)(H2O)(2)]X-2. nH(2)O (n = 1 for nic: n = 0 for isonic). The analogous reaction of CuX2.n H2O with diethylenetriamine (dien) in a molar ratio of 1:1 leads to the formation of square-pyramidal pentacoordinated complexes of the type [CuX(dien)(H2O)]X. On the other hand, the reaction of equimolar quantities of copper(II) nitrate and dien with nicotinate anions (equimolar quantities of pyridinecarboxylic acid and NaOH) in ethanolic solutions gives a solid monomeric complex [Cu(nic)(NO3)dien)(H2O)].H2O in which the coordination polyhedron around the Cu(II) atom is a (4 + 1 + 1) distorted tetragonal bipyramid. Based on the molecular structure the electronic and IR spectra are discussed. Moreover, the results of the quantitative determination of antimicrobial activity of the isonic complexes [Cu(isonic)(2)(H2O)(4)]. [Cu(en)(2)(H2O)(2)](isonic)(2), [Cu(isonic)(dien)(H2O)](isonic), as well as isonicotinic acid, ethylenediamine and diethylenetriamine alone are discussed. (C) 2000 Elsevier Science B.V. All rights reserved.
Electrochemical Synthesis and Characterization of Copper(II) and Zinc(II) Coordination Compounds with Nicotinic and Picolinic Acids
作者:E. O. Andriychenko、V. I. Zelenov、A. V. Bespalov、V. E. Bovyka、N. N. Bukov
DOI:10.1134/s1070363221090139
日期:2021.9
New methods for the electrochemical synthesis of copper(II) and zinc(II) coordination compounds with pyridinecarboxylic acids (nicotinic and picolinic) have been developed. The resulting compounds were characterized by quantitative analysis and IR spectroscopy. The vibrational frequencies of the synthesized compounds were calculated by a DFT quantum-chemical method, and the experimental IR spectra
已经开发了用吡啶羧酸(烟碱和吡啶甲酸)电化学合成铜 (II) 和锌 (II) 配位化合物的新方法。所得化合物通过定量分析和红外光谱进行表征。通过DFT量子化学方法计算合成化合物的振动频率,并在此基础上解释实验红外光谱。发现吡啶羧酸根离子在所有情况下都在氮原子和羧酸根基团上配位,然而,在烟酸的情况下,这导致形成配位聚合物,而对于吡啶甲酸,形成单核配合物是典型的。
The thermal decomposition of copper(II) nicotinate and isonicotinate
作者:Elsa E. Sileo、Pedro J. Morando、Carlos O. Della Vedova、Miguel A. Blesa
DOI:10.1016/0040-6031(89)87259-4
日期:1989.2
Abstract The thermaldecomposition of copper(II) nicotinate and isonicotinate yields, in a sharp transition, metallic copper as the final solid residue along with the release of carbon dioxide and pyridine. In the case of the nicotinate, small amounts of nicotinic acid are also detected. The decomposition is started by homolytic RC(O)O-Cu bond scission, which is equivalent to electron transfer from
摘要 烟酸铜 (II) 和异烟酸铜的热分解在急剧转变中产生作为最终固体残留物的金属铜,同时释放出二氧化碳和吡啶。在烟酸盐的情况下,也检测到少量的烟酸。分解由均裂 RC(O)O-Cu 键断裂开始,这相当于电子从 RC(O)O− 转移到 Cu(II)。