14058 IUPAC Gold Book - photonic yield 10.1351/goldbook.14058 14058 current 1 Ratio of the rate of the photoreaction measured for a specified time interval (usually the initial conditions) to the rate of incident photons of monochromatic light inside the irradiation window of the reactor. Mathematical definition: \[\frac{{\rm{d}}n/{\rm{d}}t}{q_{n,\rm{p},\lambda}^{0}}\] when using the incident spectral photon flux, chemical amount basis, \(q_{n,\rm{p},\lambda}^{0}\), with \(n\) (mol) the amount of substance produced or consumed, and \[\frac{{\rm{d}}N/{\rm{d}}t}{q_{\rm{p},\lambda}^{0}}\] when using the incident spectral photon flux, number basis, \(q_{\rm{p},\lambda}^{0}\), with \(N\) the number of entities produced or consumed. The superscript 0 (zero) emphasises the fact that the incident number of photons (prior to absorption) is used. photonic efficiency https://goldbook.iupac.org//terms/view/14057 PAC, 2011, 83, 931. 'Glossary of terms used in photocatalysis and radiation catalysis (IUPAC Recommendations 2011)' on page 974 (https://doi.org/10.1351/PAC-REC-09-09-36) https://goldbook.iupac.org/terms/view/14058/html https://goldbook.iupac.org/terms/view/14058/json https://goldbook.iupac.org/terms/view/14058/plain Citation: 'photonic yield' 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.14058 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. 2026-06-21T17:47:01+00:00