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- 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/Bookshelves/Analytical_Chemistry/Analytical_Chemistry_2.1_(Harvey)/10%3A_Spectroscopic_Methods/10.05%3A_Emission_SpectroscopyThis page discusses the concept of an analyte in an excited state and the processes of relaxation to its lower energy state. It elaborates on how excess energy is released in various ways, including a...This page discusses the concept of an analyte in an excited state and the processes of relaxation to its lower energy state. It elaborates on how excess energy is released in various ways, including as heat through vibrational relaxation, through photochemical reactions, or as a photon via electromagnetic radiation.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Time_Dependent_Quantum_Mechanics_and_Spectroscopy_(Tokmakoff)/16%3A_Quantum_Relaxation_Processes/16.01%3A_Vibrational_RelaxationWe want to address how excess vibrational energy undergoes irreversible energy relaxation as a result of interactions with other intra- and intermolecular degrees of freedom. Why is this process impor...We want to address how excess vibrational energy undergoes irreversible energy relaxation as a result of interactions with other intra- and intermolecular degrees of freedom. Why is this process important? It is the fundamental process by which nonequilibrium states thermalize. This plays a particularly important role in chemical reactions, where efficient vibrational relaxation of an activated species is important to stabilizing the product and not allowing re-crossing to the reactant well.
- 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.
