Calcium Ion−Calixquinone Complexes Adsorbed on a Silver Electrode

Calcium Ion−Calixquinone Complexes Adsorbed on a Silver Electrode

The structures and redox-switching behavior of Ca2+/calix[4]quinone complexes on a Ag surface were investigated by reflection−absorption infrared spectroscopy (RAIRS), Monte Carlo simulation, and voltammetry. RAIRS and Monte Carlo simulation show that the carboxylate groups of calix[4]arene-triacid-...

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Veröffentlicht in:Journal of physical chemistry. C 2009-11, Vol.113 (46), p.19981-19985
Hauptverfasser: Kang, Sun Kil, Lee, One-Sun, Chang, Suk-Kyu, Chung, Doo Soo, Kim, Hasuck, Chung, Taek Dong
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C: Surfaces, Interfaces, Catalysis
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container_end_page 19985
container_issue 46
container_start_page 19981
container_title Journal of physical chemistry. C
container_volume 113
creator Kang, Sun Kil
Lee, One-Sun
Chang, Suk-Kyu
Chung, Doo Soo
Kim, Hasuck
Chung, Taek Dong
description The structures and redox-switching behavior of Ca2+/calix[4]quinone complexes on a Ag surface were investigated by reflection−absorption infrared spectroscopy (RAIRS), Monte Carlo simulation, and voltammetry. RAIRS and Monte Carlo simulation show that the carboxylate groups of calix[4]arene-triacid-monoquinone (CTAQ) and calix[4]arene-diacid-diquinone (CDAQ) are involved in not only binding with the Ca2+ ions but also spontaneous adsorption of their complexes onto the Ag surface. According to the RAIRS results, the Ca2+ ions in the complexes lie in vicinity to the quinone moieties. Monte Carlo simulation provides more detailed information about the probable conformations of the Ca2+/calix[4]quinone complexes adsorbed on the Ag surface. Voltammetric behavior is consistent with the RAIRS and Monte Carlo simulation results and shows the effect of Ca2+ ions to the redox processes of the CTAQ- or CDAQ-modified Ag electrodes.
doi_str_mv 10.1021/jp9067262
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title Calcium Ion−Calixquinone Complexes Adsorbed on a Silver Electrode
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