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Photoredox catalysis is a branch of photochemistry that uses single-electron transfer.Photoredox catalysts are generally drawn from three classes of materials: transition-metal complexes, organic dyes, and semiconductors.
Photochemical immersion well reactor (50 mL) with a mercury-vapor lamp.. Photochemistry is the branch of chemistry concerned with the chemical effects of light. Generally, this term is used to describe a chemical reaction caused by absorption of ultraviolet (wavelength from 100 to 400 nm), visible (400–750 nm), or infrared radiation (750–2500 nm).
In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a photocatalyst, the excited state of which "repeatedly interacts with the reaction partners forming reaction intermediates and regenerates itself after each cycle of such interactions."
Organic photochemical reactions are explained in the context of the relevant excited states. [8] [9]Parallel to the structural studies described above, the role of spin multiplicity – singlet vs triplet – on reactivity was evaluated.
Additionally, the p-hydroxyphenacyl PPG (pHP) has been designed to react through a photo-Favorskii rearrangement. [ 26 ] [ 27 ] This mechanism yields the carboxylic acid as the exclusive photoproduct; the key benefit of the p HP PPG is the lack of secondary photoreactions and the significantly different UV absorption profiles of the products ...
Instead, scientists would refer to photosensitizers as sensitizers used in photo-oxidation or photo-oxygenation processes. Studies during this time period involving photosensitizers utilized organic photosensitizers, consisting of aromatic hydrocarbon molecules, which could facilitate synthetic chemistry reactions. However, by the 1970s and ...
Photoelectrochemistry is a subfield of study within physical chemistry concerned with the interaction of light with electrochemical systems. [ 1 ] [ 2 ] It is an active domain of investigation. One of the pioneers of this field of electrochemistry was the German electrochemist Heinz Gerischer .
Photodissociation, photolysis, photodecomposition, or photofragmentation is a chemical reaction in which molecules of a chemical compound are broken down by absorption of light or photons.