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Self-Assembled Monolayer of a Redox-Active Calix[4]arene: Voltammetric Recognition of the Ba^(2+) Ion in Aqueous Media

Chung, Taek Dong and Park, Jongseo and Kim, Jandee and Lim, Hyunchang and Choi, Mi-Jung and Kim, Joo Ryun and Chang, Suk-Kyu and Kim, Hasuck (2001) Self-Assembled Monolayer of a Redox-Active Calix[4]arene: Voltammetric Recognition of the Ba^(2+) Ion in Aqueous Media. Analytical Chemistry, 73 (16). pp. 3975-3980. ISSN 0003-2700. doi:10.1021/ac001050p.

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The Redox-active monolayer of a novel calix[4]arene recognizing redox-inactive ionic species by voltammetry is reported. Calix[4]arene-disulfide-diquinone, which is not only redox-active but is also a highly selective ionophore for the Ba^(2+) ion, spontaneously forms a stable and dense monolayer film on gold. The redox-active calixarene monolayer selectively recognizes Ba^(2+) ion in aqueous media, and the voltammetric signals are proportional to the ionic concentration. A new voltammetric peak can be detected by square-wave voltammetry upon adding a dilute solution containing Ba^(2+) ion having a concentration as low as 1.0 x 10^(-6) M. The Langmuir plot (1/i_(p) vs 1/[Ba^(2+)]) shows a linear slope in the range from 1.0 x 10^(-6) M to 1.0 x 10^(-4) M. This modified electrode does not show any significant interference from alkali and alkaline earth metal ions except for Sr^(2+) and Ca^(2+). Only 100- and 500-fold concentrations of Sr^(2+) and Ca^(2+) ions, respectively, can lead to voltammetric responses comparable to that of Ba^(2+).

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Additional Information:© 2001 American Chemical Society. Received 5 September 2000; accepted 7 May 2001; published online 11 July 2001; published in print 15 August 2001. Financial support from KOSEF (1999-2-121-001-5, H.K.), KRF (1999-015-DI0068, S.C.), and the Center for Molecular Catalysis, Seoul National University, is greatly appreciated. We also thank the Interuniversity Center for Natural Science Research Facilities, Seoul National University, for NMR and mass spectrometry services.
Funding AgencyGrant Number
Korea Science and Engineering Foundation1999-2-121-001-5
Korea Research Foundation1999-015-DI0068
Seoul National UniversityUNSPECIFIED
Issue or Number:16
Record Number:CaltechAUTHORS:20160803-120140945
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Official Citation:Chung, T. D., Park, J., Kim, J., Lim, H., Choi, M.-J., Kim, J. R., Chang, S.-K., Kim, H. (2001). Self-Assembled Monolayer of a Redox-Active Calix[4]arene:  Voltammetric Recognition of the Ba2+ Ion in Aqueous Media. Analytical Chemistry, 73(16), 3975-3980. doi:10.1021/ac001050p
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69413
Deposited By: Melissa Ray
Deposited On:03 Aug 2016 23:31
Last Modified:11 Nov 2021 04:13

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