caa a22 4500 467995362 CHVBK 20180323112555.0 cr unu---uuuuu 170328e19900701xx s 000 0 eng 10.1007/BF01244759 doi (NATIONALLICENCE)springer-10.1007/BF01244759 Liquid-liquid extraction of copper (I) and copper (II) as ion-paired complexes with acyclic 2-thienyl-containing polythioether and triphenylmethane dye anion [Elektronische Daten] [Shigeki Abe, Yasuhide Nakajima, Masatoshi Endo, Tyo Sone] Three acyclic polythioethers containing 2-thienyl units at both ends were synthesized and the effect of substituent on the extraction of copper(II) was studied. The methyl groups in the terminal thiophene ring have imparted an appreciable degree of increase in the percent extraction of copper(II), while the introduction of chlorine atoms into the 2-thienyl unit resulted in the reverse effect. Among the counter dye anions examined, tetrabromophenolphthalein ethylester was the best one for copper(II) extraction. The composition of extracted species was evaluated to be 1∶2∶2 (Cu(II)/polythioether/dye anion). Quantitative extraction of copper(I) was attained as complexes with various triphenylmethane dyes, i.e., bromocresol green, bromothymol blue, bromo-phenol blue and pyrogallol red. Copper(I) in organic phase was completely back-extracted with 2 mole/l sulfuric acid containing 10% hydrogen peroxide. Springer-Verlag, 1990 copper(I, II) nationallicence liquid-liquid extraction nationallicence acyclic polythioether with terminal 2-thienyl units nationallicence triphenylmethane dye nationallicence tetrabromophenolphthalein ethylester nationallicence Abe Shigeki Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut Nakajima Yasuhide Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut Endo Masatoshi Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut Sone Tyo Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut Microchimica Acta Springer-Verlag 102/4-6(1990-07-01), 171-177 0026-3672 102:4-6<171 1990 102 604 https://doi.org/10.1007/BF01244759 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01244759 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abe Shigeki Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut NATIONALLICENCE 700 1- Nakajima Yasuhide Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut NATIONALLICENCE 700 1- Endo Masatoshi Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut NATIONALLICENCE 700 1- Sone Tyo Department of Applied Chemistry, Yamagata University, 992, Yonezawa, Japan aut NATIONALLICENCE 773 0- Microchimica Acta Springer-Verlag 102/4-6(1990-07-01), 171-177 0026-3672 102:4-6<171 1990 102 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer