Roaming in highly excited states: The central atom ... - Science
2024年2月15日 · This study opens the door for roaming from a highly excited electronic state to produce electronically excited products, which react very differently in the atmosphere, space, and in combustion. As for SO 2 , its molecular oxygen production channel has been suggested to contribute to increasing oxygen levels in Earth’s early atmosphere.
Fundamentals of Photochemistry: Excited State …
2022年6月26日 · Some chemical reactions occurring on the excited state are also described to illustrate some possible use of the photochemistry and the pathway to achieve each chemical reaction. The final issues deal with the intermolecular energy transfer processes and the aspects involved in sensitization and molecular quenching.
Picosecond reactions of excited radical ion super-reductants
2024年6月4日 · Classical photochemistry requires nanosecond excited-state lifetimes for diffusion-controlled reactions. Excited radicals with picosecond lifetimes have been implied by numerous photoredox...
Excited-State Reactions - SpringerLink
By an excited-state reaction we mean a molecular process which changes the structure of the excited-state fluorophore, and which occurs subsequent to excitation. Such reactions occur because light absorption frequently changes the electron distribution within a fluorophore, which in turn changes its chemical or physical properties.
Catalyst-free and wavelength-tuned glycosylation based on excited …
2024年11月7日 · The chemoselectivity of organic reactions is a fundamental topic in organic chemistry. In the long history of chemical synthesis, achieving chemoselectivity is mainly limited to thermodynamic ...
Excited states | Nature Chemistry
2024年7月25日 · The reaction between an excited atom and a charged molecule has now been studied at low temperature and a reaction blockading effect has been observed that differs significantly from what is...
Excited State Anions in Organic Transformations
Utilizing light is a smart way to fuel chemical transformations as it allows the energy to be selectively focused on certain molecules. Many reactions involving electronically excited species proceed via open-shell intermediates, which offer novel and unique routes to expand the hitherto used synthetic toolbox in organic chemistry.
Light-dependent reactions - Wikipedia
Light-dependent reactions are certain photochemical reactions involved in photosynthesis, the main process by which plants acquire energy. There are two light dependent reactions: the first occurs at photosystem II (PSII) and the second occurs at photosystem I (PSI) .
Excitonic Effects of the Excited-State Photocatalytic Reaction at …
2024年2月15日 · Excitonic effects caused by the Coulomb interaction between electrons and holes play a crucial role in photocatalysis at the molecule/metal oxide interface. As an ideal model for investigating the excitonic effect, coadsorption and photodissociation of water and methanol molecules on titanium dioxide involve complex ground-state ...
Light as a Tool in Organic Photocatalysis: Multi‐Photon Excitation …
2022年4月15日 · The review summarizes recent advancements in photocatalysis related to the applications of light as a tool for controlling the reactions selectivity and reactivity. The concepts and applications of multi-photon excitation photoredox catalysis and chromoselective catalysis in organic synthesis are discussed.