09171 IUPAC Gold Book - spectroelectrochemistry 10.1351/goldbook.09171 09171 current mentioned: optically transparent electrodes (OTE) 1 Measurement methods combining spectrometric and electrochemical measurements. A UV-Vis light beam is directed through an electrode or through an adjacent diffusion layer in an electrochemical cell, and the changes in absorbance, resulting from the species generated or consumed in the electrode process or being present at electrode-solution interface, are monitored. With optically transparent electrodes (OTE), molecular adsorbates, polymer films, or other modifying layers attached to the electrode surface or being present in the phase adjacent to the electrode can be studied. By coupling a spectroscopic technique such as UV/Vis/NIR spectroscopy to an electrochemical experiment, complementary information as a function of the potential, time, and mass transport is available. PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 686 (https://doi.org/10.1515/pac-2018-0109) https://goldbook.iupac.org/terms/view/09171/html https://goldbook.iupac.org/terms/view/09171/json https://goldbook.iupac.org/terms/view/09171/plain Citation: 'spectroelectrochemistry' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09171 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-07-27T17:34:18+00:00