Synthesis of bifunctional dialkyl disulfides for fabrication of surface of gold and application to electrochemical sensors

Koji Nakano, Teiji Tanizaki, Hiroaki Taiera, Makoto Takagi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A new alkanethiol derivative containing a 18-crown-6 function (1) was introduced for fabrication of electrode surface. A 1-modified gold electrode was prepared by dipping in the solution of 1. By using a [Fe(CN)6]3-μ redox couple as an electrochemical probe, a densely packed, electrochemically insulating surface layer formation by 1 was confirmed by cyclic voltammetry. This made the amperometric sensory application of the electrode difficult. On the other hand, this property suggested a possible application to chemical sensors with electrical impedance measurements. The idea was successfully demonstrated by sensing gaseous ammonia. Organic gases such as benzene and chloroform did not give response. The surface-immobilized crown ether played a key function in determining the selectivity.

    Original languageEnglish
    Pages (from-to)1697-1698
    Number of pages2
    Journalanalytical sciences
    Volume7
    DOIs
    Publication statusPublished - Jan 1991

    All Science Journal Classification (ASJC) codes

    • Analytical Chemistry

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