Abstract − Analytical Sciences, 20(3), 553 (2004).
Voltammetric Study of the Transfer of Fluoride Ion at the Nitrobenzene | Water Interface Assisted by Tetraphenylantimony
Hajime KATANO, Yuji MURAYAMA, and Hirosuke TATSUMI
Department of Bioscience, Fukui Prefectural University, Matsuoka-cho, Fukui 910-1195 Japan
The transfer of F- ion assisted by an organometallic complex cation tetraphenylantimony (TPhSb+) across the polarized nitrobenzene | water (NB | W) interface has been studied by means of ion-transfer voltammetry. A well-defined voltammetric wave was observed within the potential window at the NB | W interface when tetraphenylantimony tetrakis(4-chlorophenyl) borate and F- ion were present in NB and W, respectively. The voltammogram can be interpreted as being due to the reversible transfer of F- ion assisted by the formation of the TPhSbF complex through the coordination of F- to Sb atom in NB. The formal formation constant of TPhSbF in NB has been determined to be 1010.95±0.2 M-1. No voltammetric wave due to the TPhSb+-assisted transfer of other anions such as Cl-, Br-, I-, NO3-, CH3COO- and H2PO4- ions has been observed within the potential window.
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