Term: global analysis
https://doi.org/10.1351/goldbook.GT07389

Definition:
Method for kinetic analysis of time-resolved emission or absorption data.

Note: Typical for the analysis of emission (or transient absorption) data. Upon excitation with a particular @W06659@, @R05045@ of the emission (or transient @A00028@ difference) decays are observed as a function of a @V06600@ parameter, e.g., the observation @W06659@, but otherwise under the same condition. All decays are then analysed together (globally) under the constraint that the @L03515@ of the transient species do not vary with the @V06600@ parameter, e.g., the observation @W06659@ in the given example. @L03515-1@-associated spectra (LAS), also called decay-associated spectra (DAS), are thus obtained. In the case of transient absorption data, the resulting spectra are often called @L03515-2@-associated difference spectra (LADS).

Related Terms:
1) wavelength (http://doi.org/10.1351/goldbook.W06659).
2) radiant intensity (http://doi.org/10.1351/goldbook.R05045).
3) lifetimes (http://doi.org/10.1351/goldbook.L03515).
4) emission (http://doi.org/10.1351/goldbook.E02056).
5) absorption (http://doi.org/10.1351/goldbook.A00036).
6) absorbance (http://doi.org/10.1351/goldbook.A00028).
7) variable (http://doi.org/10.1351/goldbook.V06600).
8) lifetime (http://doi.org/10.1351/goldbook.L03515-1).
9) lifetime (http://doi.org/10.1351/goldbook.L03515-2).

Source: PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 349 (https://doi.org/10.1351/pac200779030293)

Citation: 'global analysis' 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.GT07389

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.