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Attachment of a Reduction-Oxidative Active Diruthenium Compound to Au and Si Surfaces by “Click” Chemistry



Sujitra J. Pookpanratana, Joseph W. Robertson, Curt A. Richter, Christina A. Hacker, Lee J. Richter, Julia Savchenko, Steven Cummings, Tong Ren


We report the formation of molecular monolayers containing redox-active diruthenium(II,III) compound to gold and silicon surfaces via “click” chemistry. The use of Cu-catalyzed azide-alkyne cycloaddition enables modular design of molecular surfaces and interfaces and allows for a variety of functional substrates to be manufactured. Attachment of the diruthenium compound is monitored by using infrared and photoelectron spectroscopies. The highest occupied molecular (or system) orbital of the “clicked-on” diruthenium is clearly seen in the photoemission measurement, and is attributed to the presence of the Ru atoms. The “click” attachment is robust and allows for the electronic structure of the Ru2(ap) to be interrogated by UV photoelectron spectroscopy, solid-state electrical measurements, and solution-based electrochemical measurements.


molecular layer, molecular electronics, surface science, electronic structure


Pookpanratana, S. , Robertson, J. , Richter, C. , Hacker, C. , Richter, L. , Savchenko, J. , Cummings, S. and Ren, T. (2014), Attachment of a Reduction-Oxidative Active Diruthenium Compound to Au and Si Surfaces by “Click” Chemistry, Langmuir, [online], (Accessed May 20, 2024)


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Created August 10, 2014, Updated November 10, 2018