Title: photophysical processes
Long Title: IUPAC Gold Book - photophysical processes
DOI: 10.1351/goldbook.P04647
Status: current

Definition
Photoexcitation and subsequent events which lead from one to another state of a molecular entity through radiation and radiationless transitions. No chemical change results.

Related Terms
- Photoexcitation: https://goldbook.iupac.org//terms/view/P04613
- primary photochemical process: https://goldbook.iupac.org//terms/view/P04836

Source
- PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2264 (https://doi.org/10.1351/pac199668122223)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/P04647/html
- json: https://goldbook.iupac.org/terms/view/P04647/json
- xml: https://goldbook.iupac.org/terms/view/P04647/xml

Citation: Citation: 'photophysical processes' 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.P04647
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.
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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.
Accessed: 2026-05-09T09:26:39+00:00