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SECONDARY-AMINES; REDUCTIVE DIMERIZATION; MOLECULAR RECOGNITION; NANOPARTICLES; STABILITY; SILVER; FILMS; NANORODS; ADSORPTION; ATTACHMENT
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Assembly Of Dithiocarbamate-Anchored Monolayers On Gold Surfaces In Aqueous Solutions, Heng Zhu, Donna Coleman, Christopher Dehen, Iris Geisler, Dmitry Zemlyanov, Jean Chmielewski, Garth Simpson, Alexander Wei
Assembly Of Dithiocarbamate-Anchored Monolayers On Gold Surfaces In Aqueous Solutions, Heng Zhu, Donna Coleman, Christopher Dehen, Iris Geisler, Dmitry Zemlyanov, Jean Chmielewski, Garth Simpson, Alexander Wei
Dmitry Yurievich Zemlyanov
Dithiocarbamates (DTCs) can be formed by the in situ condensation of polar alkylamines with CS2, and assembled into dithiocarbamate-anchored monolayers (DAMs) on Au substrates in aqueous solutions. Primary and secondary amines can both be used to prepare DTCs, but have significant differences in their reactivities and product stabilities. Ultraviolet absorption spectroscopy provides a convenient method for monitoring in situ DTC formation as well as the formation of potential byproducts. The kinetics of DAM assembly on An substrates as measured by second harmonic generation (SHG) indicated first-order rate processes and saturation coverages similar to those of alkanethiols on Au. However, the …