01517 IUPAC Gold Book - dark photochemistry 10.1351/goldbook.D01517 D01517 current synonym: photochemistry without light 1 Chemical reactions involving electronically excited molecular entities which are generated thermally rather than by absorption of electromagnetic radiation. The use of this term is discouraged. Chemical reactions https://goldbook.iupac.org/terms/view/C01033 absorption https://goldbook.iupac.org/terms/view/A00036 PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2235 (https://doi.org/10.1351/pac199668122223) https://goldbook.iupac.org/terms/view/D01517/html https://goldbook.iupac.org/terms/view/D01517/json https://goldbook.iupac.org/terms/view/D01517/plain Citation: 'dark photochemistry' 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.D01517 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. 2026-07-23T16:58:51+00:00