PNNL

Abstract

In this paper, we report a technique for conducting spectroelectrochemistry on an aqueous micro-drop containing an analyte in a bulk electrolysis system, as an easy, rapid and economic way of investigating spectroelectrochemical behavior and correlating spectroscopic properties with thermodynamic potentials on a small scale. The chemical systems used to demonstrate the aqueous micro-drop technique are an absorbance based molecular probe [Fe(CN)6]3-/4- and an emission based molecular probe [Re(dmpe)3]2+/+ . These chemical systems in a micro-drop are evaluated using cyclic voltammetry, UV-visable absorbance spectroscopy, and fluorescence spectrometry.