Structural Ion Selectivity of Thia Crown Ether Compounds with a Bulky Block Subunit and Their Application as an Ion-Sensing Component for an Ion-Selective Electrode

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• 作者：Dwi Siswanta ; Kazuhisa Nagatsuka ; Hiroyuki Yamada ; Kazuhiro Kumakura ; Hideaki Hisamoto ; Yushi Shichi ; Kazuaki Toshima ; and Koji Suzuki
• 刊名：Analytical Chemistry
• 出版年：1996
• 出版时间：December 1, 1996
• 年：1996
• 卷：68
• 期：23
• 页码：4166 - 4172
• 全文大小：275K
• 年卷期：v.68,no.23(December 1, 1996)
• ISSN：1520-6882

文摘

Several 14-membered thia crown ether ionophores havinga bulky block subunit were synthesized, and their chemical structures and ion selectivities were examined indetailwhen these compounds were used as an ion-sensingcomponent of an ion-selective electrode. Theionophoresof both cyclic and noncyclic thia ethers exhibited a highselectivity for silver ion (Ag⁺), in which the sulfuratomin the ionophore molecule plays a role as the effectivecoordination donor site for the silver ion. The bestAg⁺-selective electrode was prepared with the 14-memberedthia crown ether having one sulfur atom, three oxygenatoms, and a bulky pinan subunit. The ion selectivityofthis electrode for Ag⁺ was over 10⁴ timesthat for othermetal cations. In the case where the sulfide in thethiaether ionophore was changed to sulfoxide by oxidation,ion selectivity for mercury ion became higher; therefore,the sulfoxide was found to be an effective coordinationsite for the mercury ion. The ion selectivity featuresofnoncyclic sulfide, sulfoxide, and sulfone were also examined and compared with the results of the cyclic andnoncyclic thia ethers.