Title: photoadsorption photonic yield
Long Title: IUPAC Gold Book - photoadsorption photonic yield
DOI: 10.1351/goldbook.14038
Status: current

Definition
Ratio of the maximal (typically the initial) rate of photoadsorption of entities \(\ce{B}\) (molecules, atoms, or ions) on a surface to the incident (superscript 0, zero) photon flux, \(q_{\rm{p},\lambda}^{0} = {\rm{d}}N_{\rm{p},\lambda}^{0}/{\rm{d}}t\) at a given wavelength. Both rates should be measured under otherwise identical conditions (preferably as initial rates) in order to avoid concentration and/or surface area effects.

Notes
1) Mathematical expression: \(\frac{{\rm{d}}N_{\ce{B}}/{\rm{d}}t}{q_{\rm{p},\lambda}^{0}} \ \ {\rm{for}}\ t \to 0\)
2) Yield refers to the use of monochromatic irradiation, whereas efficiency is reserved for irradiation within a wavelength range. Photonic refers to incident radiation.

Related Terms
- photoadsorption efficiency: https://goldbook.iupac.org//terms/view/14036
- photoadsorption quantum yield: https://goldbook.iupac.org//terms/view/14039

Source
- PAC, 2011, 83, 931. 'Glossary of terms used in photocatalysis and radiation catalysis (IUPAC Recommendations 2011)' on page 966 (https://doi.org/10.1351/PAC-REC-09-09-36)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/14038/html
- json: https://goldbook.iupac.org/terms/view/14038/json
- xml: https://goldbook.iupac.org/terms/view/14038/xml

Citation: Citation: 'photoadsorption 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.14038
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Accessed: 2026-06-29T20:47:36+00:00