Results 51 to 60 of about 205,802 (165)

A compact flow-based system for the determination of copper(II) and zinc(II) in water using solid-phase extraction coupled with pH modulation

Results in Chemistry
Metals such as copper(II) and zinc(II) can be found in natural and drinking water sources. However, at high concentrations, they pose significant risks to human health.
Francisca T.S.M. Ferreira, Tânia C.F. Ribas, Ana Machado, Adriano Bordalo, Raquel B.R. Mesquita, António O.S.S. Rangel   +5 more
doaj   +1 more source

Synthesis, magnetic and spectral properties of binuclear imidazolate bridged copper(II)-copper(II) and copper(II)-zinc(II) complexes

, 2001
Department of Chemistry, A P. S. University, Rewa-486 003, India Manuscript received 1 November 1999, revised 17 April 2000. accepted 26 August 2000 Two new binuclear imidazolate bridged complexes, [(PAN)Cu(im)Cu(PAN)] (ClO4)2 and [(PAN)Cu(im)Zn(PAN)](ClO4)2 (PAN =1. (2-pyridylazo)-2-naphthol, im = imidazolate) have been prepared.
Ram N. Patel, Ayodhya P. Patel, Krishna B. Pandeya   +2 more
openaire   +2 more sources

3-Nitroso-4-hydroxy-5,6-benzocoumarin (NHBC) as a reagent for the spectrophotometric determination of copper(II) in alloys

CHIMIA, 1974
Copper(II) forms in the pH range 6.3 to 7.8 a yellowish brown complex with 3-nitroso-4-hydroxy-5,6-benzocoumarin which is soluble in a 60 % dioxan medium giving a deep yellow coloured solution. Beer’s law is obeyed up to 2.80 ppm of copper(II) at 420 nm.
Nitin Kohli, R.P. Singh
doaj   +1 more source

Binding copper(II) ion released from azo-amino acid Schiff base complex into lysozyme crystals as models for treatment of Alzheimer’s disease [PDF]

Exploration of Drug Science
Aim: One of the causes of Alzheimer’s disease (AD) is the structural change and aggregation of target proteins due to the binding of metal ions. In this study, we investigated where copper(II) ions bound to the protein egg white lysozyme crystals in a ...
Ayumu Odaka, Temitayo O. Aiyelabola, Seiya Akimoto, Daisuke Nakane, Patience Dooshima Iorungwa, Takashiro Akitsu   +5 more
doaj   +1 more source

Bis(amino acidato)copper(II) compounds in blood plasma: a review of computed structural properties and amino acid affinities for Cu2+ informing further pharmacological research

Arhiv za Higijenu Rada i Toksikologiju
Neutral bis(amino acidato)copper(II) [Cu(aa)2] coordination compounds are the physiological species of copper(II) amino acid compounds in blood plasma taking the form of bis(l-histidinato)copper(II) and mixed ternary copper(II)-l-histidine complexes ...
Sabolović Jasmina
doaj   +1 more source

N,N′,N′′ versus N,N′,O imine-containing coordination motifs: ligand-directed synthesis of mononuclear and binuclear CuII compounds

Acta Crystallographica Section E: Crystallographic Communications, 2017
It is demonstrated here that tridentate imine ligands can control the nuclearity of copper(II) complexes based on the donor atoms present in the ligand.
Raphael Enoque Ferraz de Paiva, Douglas Hideki Nakahata, Marcos Alberto de Carvalho, Fernando Rodrigues Goulart Bergamini, Pedro Paulo Corbi   +4 more
doaj   +1 more source

Monotropic Polymorphism in Copper(II) Decanoate

Crystal Growth & Design, 2008
Copper(II) decanoate was synthesized, purified and studied by DSC, optical microscopy, XRD, and FTIR and C-13 NMR spectroscopies. Depending on the solvent used for crystallization two polymorphs were obtained. A combination of singlecrystal and powder XRD was used to study their structures.
Ramos Riesco, Miguel, Martínez Casado, Francisco Javier, López De Andrés, María Sol, García Pérez, María Victoria, Redondo Yélamos, María Isabel, Torres, M.R., Garrido, Leoncio, Rodríguez Cheda, José Antonio   +7 more
openaire   +3 more sources

Determination of Trace Copper(II) in Food Samples by Flame Atomic Absorption Spectrometry after Cloud Point Extraction [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2011
A new method for the determination of trace copper(II) in food samples by Cloud Point Extraction(CPE) combined with Flame Atomic Absorption Spectrometry(FAAS) is presented and evaluated.
Guoqiang Xiang, Shengping Wen, Xiuming Jiang, Xing Liu, Lijun He   +4 more
doaj  

Copper(II) Bromide Complexes: Crystal Structures, Magnetic Properties, and Hydrogen-Bond-Mediated Exchange

Inorganics
Copper(II) compounds exhibit interesting magnetic properties due to halide–halide, copper–halide, and intermolecular hydrogen bond interactions. In this study, seven new copper(II) bromide complexes were synthesised, six of which contain Dabco (1,4 ...
Žan Zakošek, Evgeny Goreshnik, Zvonko Jagličić, Srečo Škapin   +3 more
doaj   +1 more source

MOLECULAR DESCRIPTION OF COPPER (I) OXIDE AND COPPER (II) OXIDE

Química Nova
The topological index of a molecular structure correlate certain physicochemical properties such as boiling point and stability of that molecular structure.
Wei Gao, Muhammad Imran, Muhammad Kamran Siddiqui, Muhammad Naeem, Farrukh Jamil   +4 more
doaj   +1 more source