title: Effect of octabromination of a tetrakis(4-carboxyphenyl)porphine derivative bound to silica gels on HPLC retention behaviors of polyaromatic hydrocarbons.
abstract: The effect of bromination of Cu-porphyrin-derivative-immobilized silica gels (Cu-TCPP(D)) was examined by comparing the retention behaviors of polyaromatic hydrocarbons (PAHs) on Cu-TCPP(D) and Cu-octabromotetrakis(4-carboxyphenyl)porphine-derivative-immobilized silica gels (Cu-OBTCPP(D)) columns. It was revealed that bromination affects strongly the pi-pi electron interactions caused from hydration energy in a polar eluent (80% methanol) possibly as a result of a destruction of planar structure of porphine-ring by bromination. It was also revealed that bromination enhances pi-d interactions as well as the pi-pi electron interactions in a broad sense (e.g., dispersion forces) in a non-polar eluent (n-hexane). However, the bromination did not exert much influence on electrostatic interactions caused from polarization of mono-halogenated benzenes.
authors.affiliation: Department of Pharmaceutical Sciences, Graduate School of Medicine and Dentistry and Pharmaceutical Sciences, Okayama University, Tsushima-Naka, Okayama, Japan.
authors.forename: Youji
authors.initials: Y
authors.lastname: Kitamura
authors.forename: Kenji
authors.initials: K
authors.lastname: Kawata
authors.forename: Kurumi
authors.initials: K
authors.lastname: Tanaka
authors.forename: Yuko
authors.initials: Y
authors.lastname: Furuyashiki
authors.forename: Masaki
authors.initials: M
authors.lastname: Mifune
authors.forename: Ikuko
authors.initials: I
authors.lastname: Tsukamoto
authors.forename: Madoka
authors.initials: M
authors.lastname: Saito
authors.forename: Jun
authors.initials: J
authors.lastname: Haginaka
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Saito