Electrochemical detection of electrochemically inactive cations by self-assembled monolayers of crown ethers

S Flink, BA Boukamp, A Van Den Berg…

Index: Flink, Simon; Boukamp, Bernard A.; Van Den Berg, Albert; Van Veggel, Frank C. J. M.; Reinhoudt, David N. Journal of the American Chemical Society, 1998 , vol. 120, # 19 p. 4652 - 4657

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Citation Number: 197

Abstract

Self-assembled monolayers (SAMs) of 2-[(6-mercaptohexyl) oxy] methyl-12-crown-4 (1) and 2-[(6-mercaptohexyl) oxy] methyl-15-crown-5 (2) on gold are able to bind cations reversibly from aqueous solutions. This binding of the electrochemically inactive cations is monitored by cyclic voltammetry and impedance spectroscopy using the redox couple Ru (NH3) 62+/3+ as “reporter ion”. Gold electrodes modified with 1 detect Na+ even in the presence ...