Selectivity in the Extraction of Copper(II) with a New Alkylated 8-Quinolinol Derivative with a Nitrophenylazo Substituent

Autor:	Hisanori Imura, Kousaburo Ohashi, Hideyuki Ikeda, Kayoko Nakayama
Rok vydání:	1993
Předmět:	Chloroform Chemistry Inorganic chemistry Extraction (chemistry) Substituent chemistry.chemical_element Copper Medicinal chemistry Analytical Chemistry Metal chemistry.chemical_compound Liquid–liquid extraction visual_art visual_art.visual_art_medium Chelation Selectivity
Zdroj:	Analytical Sciences. 9:355-359
ISSN:	1348-2246 0910-6340
DOI:	10.2116/analsci.9.355
Popis:	The extraction behavior of MnII, FeIII, CoII, NiII, CuII, ZnII, GaIII, and CdII was studied with a new chelating extractant, 5-(4-nitrophenylazo)-7-(4-ethyl-1-methyloctyl)-8-quinolinol (HNEQ), in chloroform. HNEQ exhibits a much higher extractability for CoII, CuII, ZnII, and CdII than 8-quinolinol. Especially, CuII was quantitatively extracted with 0.001mol dm-3 of HNEQ at such a low pH as 2.0 within 15min, and was readily separated from the other metal(II, III) ions studied. From equilibrium studies, the extracted CuII-HNEQ chelate was ascertained to be Cu(NEQ)2. The extraction constant (logKex) was determined to be 4.25, which was much larger than those for 7-(4-ethyl-1-methyloctyl)-8-quinolinol (Kelex 100) and 8-quinolinol.
Databáze:	OpenAIRE
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