title: "Substituent on benzenesulfonyl group" effect in use of 8-benzenesulfonamidoquinoline derivatives as chelate extractant.
abstract: "Substituent on benzenesulfonyl group" effect of 8-benzenesulfonamidoquinoline [N-(8-quinolyl)benzenesulfonamide, Hbsq] as bidentate chelate extractant for divalent metal cations was investigated with using Hbsq and its eight derivatives. Introduction of electron-withdrawing substituent on the benzenesulfonyl group in Hbsq enhanced the extractability that originated from its inductive effect. Furthermore, a bulky substituent on an ortho-position of the benzenesulfonyl group resulted in no steric effect in extraction, whereas the existence of two substituents on each ortho-position caused lower extraction performance due to steric hindrance.
authors.affiliation: Department of Chemistry, Faculty of Science, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan. hirayama@cacheibm.s.kanazawa-u.ac.jp
authors.forename: Naoki
authors.initials: N
authors.lastname: Hirayama
authors.forename: Noriko
authors.initials: N
authors.lastname: Sugisaka
authors.forename: Junko
authors.initials: J
authors.lastname: Taga
authors.forename: Syunichi
authors.initials: S
authors.lastname: Oshima
authors.forename: Takaharu
authors.initials: T
authors.lastname: Honjo