14998-37-9Relevant academic research and scientific papers
Thermo-Raman spectroscopy in situ monitoring study of solid-state synthesis of NiO-Al2O3 nanoparticles and its characterization
Ghule, Anil Vithal,Ghule, Kalyani,Tzing, Shin-Hwa,Punde, Tushar H.,Chang, Hua,Ling, Yong Chien
, p. 3406 - 3411 (2009)
Hyphenation of thermogravimetric analyzer (TGA) and thermo-Raman spectrophotometer for in situ monitoring of solid-state reaction in oxygen atmosphere forming NiO-Al2O3 catalyst nanoparticles is investigated. In situ thermo-Raman spe
Magnetostructural correlations in heteroleptic nickel(II) complexes
Titi?,Bo?a,Dlha?n?, L'.,?ur?eková,Fuess,Ivaniková,Mrázová,Papánková,Svoboda
, p. 1523 - 1530 (2007)
Heteroleptic nickel(II) complexes with the general formula Ni(L)m(H2O)n(X)k, have been synthesized and structurally characterized; L stands for neutral N-donor ligands: 4-benzofuropyridine (bzfupy), dimethylfuro
Kinetics of the Dissociation of Transition Metal Complexes with α,α-Dipyrrolylmethene in Acetic Acid-Benzene as a Binary Proton-Donating Solvent
Guseva,Antina,Berezin
, p. 690 - 693 (2003)
The kinetics of the dissociation of Co(II), Ni(II), and Zn(II) complexes with 4,4′-dibutyl-3,3′,5,5′-tetramethyldipyrrol-2,2′- ylmethene was studied in acetic acid-benzene as a binary proton-donating solvent. The metal nature was found to affect the kinetic parameters of the process. Assumptions were made about the limiting step of the process and the effectiveness of d metal ions in the template synthesis of porphyrins from dipyrrolylmethenes.
The Kinetics of Growth of Metallo-supramolecular Polyelectrolytes in Solution
Munzert, Stefanie Martina,Stier, Simon P.,Schwarz, Guntram,Weissman, Haim,Rybtchinski, Boris,Kurth, Dirk G.
, p. 2898 - 2912 (2018)
Several transition metal ions, like Fe2+, Co2+, Ni2+, and Zn2+ complex to the ditopic ligand 1,4-bis(2,2′:6′,2′′-terpyridin-4′-yl)benzene (L). Due to the high association constant, metal-ion induced self-assembly of Fe2+, Co2+, and Ni2+ leads to extended, rigid-rod like metallo-supramolecular coordination polyelectrolytes (MEPEs) even in aqueous solution. Here, we present the kinetics of growth of MEPEs. The species in solutions are analyzed by light scattering, viscometry and cryogenic transmission electron microscopy (cryo-TEM). At near-stoichiometric amounts of the reactants, we obtained high molar masses, which follow the order Ni-MEPE≈Co-MEPEa reversible step-growth mechanism. The forward polymerization rate constants follow the order Co-MEPEFe-MEPENi-MEPE and the growth of MEPEs can be accelerated by adding potassium acetate.
Study of nickel-cobalt alloy electrodeposition from a sulfamate electrolyte with different anion additives
Golodnitsky,Gudin,Volyanuk
, p. 4156 - 4163 (2000)
The experimental results of the present study show that the composition of the electrodeposited nickel-cobalt alloy in sulfamate electrolytes containing anion additives is influenced in a complicated manner by the concentrations of cobalt(II) ion and citric acid, pH, and applied current density. The operating conditions were found under which the increase in the pH of the solution adjacent to the cathode is inhibited. Citrate anions form a wide variety of complexes with nickel and cobalt. Protonated citrate complexes of nickel(II) and cobalt(II) are apt to be involved in the electrochemical alloying process. Acetate anions serve to buffer the sulfamate solutions. Nickel-cobalt electrochemical alloying leads to an increase in the reaction rate of cobalt at the expense of the nickel reaction rate. The data confirm that inhibition of the more noble metal by the less noble one does not depend on the anion composition of the electrolyte.
Heteroleptic nickel(II) complexes formed from N-donor bases, carboxylic acids and water: Magnetostructural correlations
Ivaniková,Bo?a,Dlháň,Fuess,Ma?lejová,Mrázová,Svoboda,Titi?
, p. 3261 - 3268 (2006)
Nickel(II) complexes with the general formula [Ni(L1)2(L2)2(H2O)2], where L1 = 2-methylimidazole (Meiz), 1,2-dimethylimidazole (Me2iz), iso-quinoline (iqu) and 4-furopyridine (fupy), L2 = formate and acetate, have been prepared and characterized. The structures of four complexes [Ni(Meiz)2(HCOO)2(H2O)2] (1), [Ni(Me2iz)2(HCOO)2(H2O)2] (2), [Ni(iqu)2(CH3COO)2(H2O)2] (3) and [Ni(fupy)2(CH3COO)2(H2O)2] (4) were determined by X-ray diffraction methods. The chromophore of these compounds, {NiO2 O2′ N2}, is formed by four oxygen atoms and two nitrogen atoms. The structures of complexes 2, 3 and 4 are formed by two-dimensional networks which consist of individual molecules linked together by O-H?O hydrogen bonds from carboxylate groups to aqua ligands. In complex 1, the formation of a three-dimensional network is supplemented by N-H?O, hydrogen bonds from the coordinated oxygen atom to the secondary nitrogen atom of an imidazole molecule from another unit. All complexes show magnetic behavior typical for zero-field splitting systems. The axial parameter of the zero-field splitting, D, adopts moderate-negative values and it correlates with the axial distortion of the coordination polyhedron.
Late-Stage Derivatization of Buflavine by Nickel-Catalyzed Direct Substitution of a Methoxy Group via C-O Bond Activation
Shimazumi, Ryoma,Morita, Kosuke,Yoshida, Tomoki,Yasui, Kosuke,Tobisu, Mamoru
, p. 3037 - 3044 (2021)
The nickel-catalyzed cross-coupling of methoxyarenes was applied to buflavine, which allows for the selective monosubstitution of one of the two methoxy groups in the molecule, leading to the formation of 2- and 3-substituted isomers. Trimethylsilylmethyl (TMSCH 2), phenyl, and alkynyl groups can be introduced into buflavine using this method. The resulting TMSCH 2analogue of buflavine can also be converted into several other derivatives.
Cobalt and nickel acetates in anhydrous acetic acid
Tappmeyer,Davidson, Arthur W.
, p. 823 - 825 (1963)
Both cobalt and nickel acetates form hemisolvates with acetic acid. Both of these compounds exhibit retrograde solubility in anhydrous acetic acid between 16 and 65°, solubility equilibrium being attained very slowly. From ternary mixtures of cobalt aceta
A thermochemical study of the reaction of salicylaldoxime with anhydrous nickel(II) and cobalt(II) acetate
Songsheng, Qu,Ying, Feng,Ruili, Yang,Liangchao, Li
, p. 47 - 53 (1997)
The solid-state coordination reaction: 2HSAO(s) + Ni(Ac)2(s) → Ni(SAO)2(s) + 2HAc(g) 2HSAO(s) + Co(Ac)2 · 4H2O(s) → Co(SAO)2 · 2H2O(s) + 2HAc(g) + 2H2O(g) have been studied by classical solution calorimetry. The molar dissolution enthalpies of the reactants and the products in a certain solvent (for one reaction is in 6 mol 1-1 HCl and another in a mixed solution consisting of DMSO and DMF) of this two solid-solid coordination reactions have been measured using an isoperibol calorimeter. From the results and other auxiliary quantities, the standard molar formation enthalpies of [Co(SAO)2·2H2O, s, 298.2 K] and [Ni(SAO)2, s, 298.2 K] at 298.2 K have been determined to be ΔfΗm [Co(SAO)2·2H2O, s, 298.2 K] = -957.205 kJ mol-1 and ΔfΗm [Ni(SAO)2, s, 298.2 K] = -403.336 kJ mol-1.
Ni(II) complex extended structures sustained by hydrogen bonding, φ-φ and C-HφInteractions
Zhang, Zhen-Ming,Yin, Fu-Jun,Zhao, Gui,Wang, Li-Ping,Zhao, Hong
, p. 814 - 816 (2014)
The complex [Ni(NAA)2 (im)6](1) (where H 2NAA = α-naphthylacetic acid and im = imidazole) has been synthesized under solvothermal conditions. The complex fully characterized by IR spectroscopy, elemental analysis and single crystal X-ray diffraction. In complex 1, Ni(II) is coordinated by six N atoms with a octahedral coordination geometry. This mononuclear complex is further extended into threedimensional structure via φ-φ, C-Hφand hydrogen bonding interactions. The thermal stable property of complex 1 is also reported.
