start-ver=1.4
cd-journal=joma
no-vol=5
cd-vols=
no-issue=2
article-no=
start-page=195
end-page=200
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=1989
dt-pub=19890410
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Liquid-Liquid Distribution Behavior of Ion Association Complexes of Dihalogenocuprate(I) Anions with Azo-Dye Cations as Counter Ions
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The solvent extraction of ion association complexes of dihalogenocuprate(I) ions CuX(2)(-)(X-=chlorideb,r omide and
iodide ions), with 4-(4-diethylaminophenylazo)-N-alkylpyridiniumc ations (azo-dye cations) is described: the alkyl groups of the azo-dye cations were methyl, ethyl and propyl groups. The extraction constants (K(ex)) for the ion
association complexes of CuX(2)(-) and X(-) with these three azo-dye cations between an aqueous phase and several
organic phases (chloroform, chlorobenzene, benzene and toluene) were determined. The extractabilities of CuX2
and X(-) were in the orders CuCl(2)(-)<CuBr(2)7<Cul(2)(-), and Cl(-)(Br(-)<I(-) respectively:t he differences in log K(ex) between two successive ions averaged about 1.2 and 1.3 for CuX(2)(-) and about 1.2 and 1.9 for X(-). In all of the ion association complexes examined, the order of the values of the extraction constants was chloroform>chlorobenzene>benzene>toluene. The difference in the value of log K(ex) between chloroform and chlorobenzene for CuX(2)(-) was much smaller than that for X(-) while between other solvents the differences in log K(ex) values for CuX(2)(-) and t were almost the same. From the extraction constants obtained, some possible extraction systems for a spectrophotometry for copper are predicted: they include one using chlorobenzene, the methyl derivative of the azo-dye, and iodide ion and one using chlorobenzene, the propyl derivative of the azo-dye and bromide ion.
en-copyright=
kn-copyright=

en-aut-name=YamamotoKoichi
en-aut-sei=Yamamoto
en-aut-mei=Koichi
kn-aut-name=山本幸市
kn-aut-sei=山本
kn-aut-mei=幸市
aut-affil-num=1
ORCID=

en-aut-name=MotomizuShoji
en-aut-sei=Motomizu
en-aut-mei=Shoji
kn-aut-name=本水昌二
kn-aut-sei=本水
kn-aut-mei=昌二
aut-affil-num=2
ORCID=

affil-num=1
en-affil=
kn-affil=岡山大学

affil-num=2
en-affil=
kn-affil=岡山大学
en-keyword=Solvent extraction
kn-keyword=Solvent extraction
en-keyword=copper
kn-keyword=copper
en-keyword=dihalogenocuprate(I)-azo dye ion association complex
kn-keyword=dihalogenocuprate(I)-azo dye ion association complex
en-keyword=4-(4-diethylaminophenylazo)-N-alkylpyridinium cation
kn-keyword=4-(4-diethylaminophenylazo)-N-alkylpyridinium cation
END