Photostability refers to the ability of a substance, typically a chemical compound or material, to resist degradation or change when exposed to light. This property is crucial for understanding how substances behave under illumination, affecting their applications in various fields, such as photochemistry and photobiology. Photostability impacts the efficiency and longevity of light-sensitive materials, including pigments and pharmaceuticals, which can be influenced by factors like the Franck-Condon principle and singlet oxygen generation.
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