Term: chemically initiated electron exchange luminescence (CIEEL) https://doi.org/10.1351/goldbook.CT07340 Definition: Type of luminescence resulting from a thermal electron-transfer reaction. Also called catalyzed chemiluminescence. Related Terms: 1) luminescence (http://doi.org/10.1351/goldbook.L03641). 2) chemiluminescence (http://doi.org/10.1351/goldbook.C01045). Source: PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 313 (https://doi.org/10.1351/pac200779030293) Citation: 'chemically initiated electron exchange luminescence (CIEEL)' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.CT07340 License: 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. Disclaimer: 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.