Tetrathiaoxa Macrocycles with Dibenzo-subunits: A Search for New Tl(I)- and Ag(I)-Selective Ionophores |
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Authors: | Ki-Min Park Yongri Jin Joobeom Seo IL Yoon Sang Cheol Lee |
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Affiliation: | 1. Department of Chemistry and Research Institute of Natural Sciences , Gyeongsang National University , 660-701, Chinju, S. Korea;2. Department of Chemistry , Inje University , 621-749, Kimhae, S. Korea |
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Abstract: | Novel S4O n mixed donor macrocycles (1, n=1; 2, n=2) were synthesized by the coupling reactions of corresponding dichlorides with dithiols under high dilution conditions. Synthesis and crystal structures of Tl+ and Ag+ complexes, [Tl(2)+ and Ag(2)+], with macrocycle 2 are described. The electrode based on macrocycle 2 showed excellent potentiometric sensing ability for Tl+ and Ag+ ions. This remarkable sensing of the proposed electrode can be understood in terms of the synergy effect of a soft–soft acid–base interaction and π-coordination, especially for the Tl+ ion, which was observed from the crystal structure of the corresponding complex. |
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Keywords: | Macrocyclic complex Crystallography Thallium Ion-selective electrodes Silver |
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