Abstract
Femtosecond infrared absorption studies strongly suggest that photoexcited 9-anthranol takes part in an ultrafast electron transfer (ET) reaction in electron-donating triethylamine solvent, but that ultrafast proton coupled electron transfer (PCET) occurs in diethylamine solvent.
Highlights
Proton-coupled electron transfer (PCET) is one of the most fundamental reactions and play important roles in energy conversion in biological systems, including water oxidation at the oxygen evolving center in photosynthesis [1] and four-electron reduction of dioxygen by cytochrome c oxidase in respiration [2]
We report on the electron transfer (ET) reaction between photoexcited 9-anthranol (ANTH) and the aliphatic amines diethylamine (DEA) and triethylamine (TEA) using femtosecond IR absorption spectroscopy
Freiermuth et al [5] reported that 9-anthrone/9-anthranol exist in different tautomeric forms, namely like 9-anthrone (ANT) in TCE and acetonitrile, but 9-anthranol (ANTH) in aliphatic amine solvents, such as DEA and TEA, whereas both tautomers are present in alcoholic solvents
Summary
Proton-coupled electron transfer (PCET) is one of the most fundamental reactions and play important roles in energy conversion in biological systems, including water oxidation at the oxygen evolving center in photosynthesis [1] and four-electron reduction of dioxygen by cytochrome c oxidase in respiration [2]. Femtosecond infrared absorption studies strongly suggest that photoexcited 9-anthranol takes part in an ultrafast electron transfer (ET) reaction in electron-donating triethylamine solvent, but that ultrafast proton coupled electron transfer (PCET) occurs in diethylamine solvent.
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