148932-06-3Relevant academic research and scientific papers
Silver Selectivity of Novel Monoazapolythioether Derivatives Bearing a Hydrazone Group in the Solvent Extraction
Sakamoto, Hidefumi,Ishikawa, Junichi,Mizuno, Tamao,Doi, Kunio,Otomo, Makoto
, p. 609 - 612 (1993)
Novel acyclic and cyclic monoazapolythioether derivatives incorporating a substituted hydrazone group were synthesized. The acyclic and cyclic monoazatetrathioether derivatives exhibited high Ag+ ion selectivity in the extraction with 1,2-dichl
Silver Ion Selective Extraction with Dithiaza-, Tetrathiaza-, and Tetrathiadiazacrown Ether Derivatives
Sakamoto, Hidefumi,Ishikawa, Junichi,Otomo, Makoto
, p. 2831 - 2836 (2007/10/03)
Dithiazacrown, tetrathiazacrown, and two tetrathiadiazacrown ether derivatives, bearing a phenyl group on each nitrogen atom at the periphery, were synthesized, and the solvent extractions of some transition metal ions with these compounds were carried out using an H2O-1,2-dichloroethane system.All of the thiazacrown compounds employed exhibited Ag+ selectivity, and formed 1:1:1 complexes of Ag+ : ligand : laurate ion as a counter anion to be extracted into a 1,2-dichloroethane solution.The extractabilities (extraction constants, Kex) for Ag+ decreased in the order: 7,16-diphenyltetrathia-7,16-diaza-18-crown-6 (3) (log Kex = 1.18+/-0.13) > 13-phenyltetrathia-13-aza-15-crown-5 (2) (0.75+/-0.09) > 7-phenyldithia-7-aza-9-crown-3 (1) (-0.47+/-0.06)>13, 16-diphenyltetrathia-13,16-diaza-18-crwon-6 (4) (-0.62+/-0.16).
