Abstract
In situ rotating ring disk electrode (RRDE) and simultaneous electrochemical‐electron spin resonance (SEESR) techniques have been employed to characterize the products and the phases of the products formed during voltammetric reduction or oxidation of microcrystalline solids mechanically attached to an electrode which has been placed in a solvent (electrolyte) medium in which the components are insoluble. Results obtained for reduction of solid organic 7,7,8,8‐tetracyanoquinodimethane (TCNQ) and oxidation of solid organometallic trans‐ [dpe: 1,2‐bis(diphenylphosphino)ethane)] show that the two compounds exhibit similar mechanistic pathways despite their substantially different chemical and physical natures. Data obtained from both RRDE and SEESR techniques show that a solid‐state nucleation/growth mechanism confined to the electrode surface dominates the electrochemical processes at potentials where voltammmetric peaks are observed. Thus, for example, in solvent (electrolyte) combinations where the product of electrolysis ( and trans‐) are insoluble, characteristic solid‐state electron spin resonance (ESR) spectra are obtained. In contrast, solution phase ESR spectra are obtained when the electrode is placed in media in which the products are soluble. Data obtained confirm that the conductivity associated with the solids does not play a significant role in the voltammetric response of solid microcrystalline compounds when mechanically attached to an electrode surface.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.