Fotokemilistes

Fotokemilistes refers to chemical reactions that are initiated or modified by the absorption of light. The term originates from the Greek words "photo" meaning light, and "chemistry" relating to chemical reactions. These reactions typically involve the absorption of photons by molecules, leading to electronic excitation. This excited state can then undergo various transformations, such as bond breaking, rearrangement, or energy transfer to another molecule. A common example is photosynthesis, where light energy is converted into chemical energy by plants. Another is the photodegradation of materials, where exposure to sunlight breaks down plastics or dyes. Photocatalysis is another important area, where a catalyst absorbs light to drive a chemical reaction. The quantum yield is a measure of the efficiency of a photochemical reaction, representing the ratio of molecules reacted to photons absorbed. Understanding fotokemilistes is crucial in fields ranging from organic synthesis and materials science to environmental chemistry and biology.