Abstract − Analytical Sciences, 27(4), 389 (2011).
Effect of π Electrons on the Detection of Silver Ions by Ion-selective Electrodes Containing Tripodal Broom Molecules as an Ionophore
Chihiro YAMAMOTO, Hirokazu SETO, Keisuke OHTO, Hidetaka KAWAKITA, and Hiroyuki HARADA
Department of Chemistry and Applied Chemistry, Faculty of Science and Engineering, Saga University, 1 Honjo, Saga 840-8502, Japan
Tripodal “broom” molecule derivatives containing π electrons were used as ionophores of silver ion-selective electrodes. The ability of the electrodes to detect silver ions was evaluated using the Nernst equation. When allyl- and propargyl-type tripodal broom molecules, and a propargyl-type monopodal analog were used in the electrode, Nernstian responses for silver ions were observed, indicating that π electrons play an important role in the detection of silver ions. In the presence of interfering metal ions, the selectivity for silver ions was affected by the number and density of π electrons in the ionophore. The electrode containing the allyl-type tripodal broom molecule was used to accurately determine the concentration of glucosamine hydrochloride in a real sample.
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