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- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Molecular_and_Atomic_Spectroscopy_(Wenzel)/3%3A_Molecular_Luminescence/3.4%3A_Excitation_and_Emission_SpectraThe important thing to consider in addressing this question is that the lifetime of the S 1 state from which fluorescence occurs is approximately 10 -8 second whereas the lifetime of the T 1 state fro...The important thing to consider in addressing this question is that the lifetime of the S 1 state from which fluorescence occurs is approximately 10 -8 second whereas the lifetime of the T 1 state from which phosphorescence occurs is on the order of 10 -4 to 100 seconds. The one exception is if the S 0 -S 1 transition is the maximum on both spectra, which would mean having the excitation and emission monochromators set to the same wavelength.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/10%3A_Spectroscopic_Methods/10.06%3A_Photoluminescent_SpectroscopyThis page provides an in-depth explanation of photoluminescence, dividing it into two categories: fluorescence and phosphorescence. It describes the processes, mechanisms, and factors influencing both...This page provides an in-depth explanation of photoluminescence, dividing it into two categories: fluorescence and phosphorescence. It describes the processes, mechanisms, and factors influencing both types, including radiative and non-radiative deactivation pathways. The page discusses the technological advancements in fluorescence and phosphorescence spectroscopy, related instrumentation, and depicts their quantitative applications for analyzing inorganic and organic analytes.
- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Analytical_Chemistry/2%3A_Analytical_Chemistry_2.0_(Harvey)/11%3A_Spectroscopic_Methods/11.06%3A_Photoluminescence_SpectroscopyPhotoemission is divided into two categories: fluorescence and phosphorescence. Emission of a photon from the singlet excited state to the singlet ground state—or between any two levels with the same ...Photoemission is divided into two categories: fluorescence and phosphorescence. Emission of a photon from the singlet excited state to the singlet ground state—or between any two levels with the same spin—is called fluorescence. Emission between a triplet excited state and a singlet ground state—or between any two levels that differ in their respective spin states–is called phosphorescence. Both fluorescence and phosphorescence can be used for qualitative analysis and semi-quantitative analysis.
