Ultrafast Dynamics of a 'Super' Photobase

Autor:	Sheng, Wei, Nairat, Muath, Pawlaczyk, Patrick D., Mroczka, Elizabeth, Farris, Benjamin, Pines, Ehud, Geiger, James H., Borhan, Babak, Dantus, Marcos
Rok vydání:	2018
Předmět:	Schiff base Chemistry Imine Intermolecular force General Chemistry 02 engineering and technology General Medicine Conjugated system Photochemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Article Catalysis 0104 chemical sciences Photoexcitation chemistry.chemical_compound Excited state Reactivity (chemistry) Electron configuration 0210 nano-technology
Zdroj:	Angew Chem Int Ed Engl
ISSN:	1521-3757 0044-8249
DOI:	10.1002/ange.201806787
Popis:	Molecular reactivity can change dramatically with the absorption of a photon due to the difference of the electronic configurations between the excited and ground states. Here we report on the discovery of a modular system (Schiff base formed from an aldehyde and an amine) that upon photoexcitation yields a more basic imine capable of intermolecular proton transfer from protic solvents. Ultrafast dynamics of the excited state conjugated Schiff base reveals the pathway for proton transfer, culminating in a 14-unit increase in pK(a) to give the excited state pK(a)* > 20 in ethanol.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::417f647ed3c4581b6b4e77aecd1618bc https://doi.org/10.1002/ange.201806787 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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