Self-assembled monolayers of metallosalophenes on gold


Beulen, Marcel W.J. and Veggel, Frank C.J.M. van and Reinhoudt, David N. (2000) Self-assembled monolayers of metallosalophenes on gold. Israel Journal of Chemistry, 40 (2). pp. 73-80. ISSN 0021-2148

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Abstract:Salophene complexes of transition metals exhibit a reversible electro- chemistry. We have synthesized salophene complexes with sulfur-containing substituents aimed at the formation of self-assembled monolayers on a gold surface. Such monolayers have interesting cation complexating properties. The monolayers were fully characterized by wettability studies, grazing-angle Fourier transform infrared spectroscopy (FT-IRS), X-ray photoelectron spectroscopy (XPS), time-of-flight secondary-ion mass spectrometry (TOF-SIMS), and electrochemical capacitance measurements. These measurements indicate liquid-like monolayers. Cation complexation could be monitored indirectly by electrochemical impedance spectroscopy measurements, showing responses for Na+ and K+. This complexation behavior of the metallosalophene monolayers could not be studied directly by electrochemistry of the metallosalophene either due to electrochemical instability of the monolayer or a smeared redox response.
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Copyright:©2008 Laser Pages
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