New Method for Obtaining Transmission Infrared and Visible Spectra of Thin Polymeric Films

摘要

There is a continuing need for spectroanalytical techniques for the identification, characterization, and analysis of thin polymeric films on electrodes. In many cases a metallic substrate is required for the fabrication of the polymeric film. One example is electropolymerization, where the polymer is formed at the electrode surface. Another is the chemical modification of prefabricated polymers during which the integrity of the film could not be maintained without specific absorption onto a solid support such as platinum. We report here a procedure for obtaining both transmission IR and visible spectra of the same electropolymerized or spun-cast polymeric film on platinized sodium chloride plates. If the metallic layer is sufficiently thin, the salt plates remain semitransparent in both the IR and visible regions and yet are sufficiently conductive to use as electrodes. (Reprints).