Abstract
The formation of nitrous acid (HONO) through photolysis of o-nitrophenol was captured in real time by time-resolved photoelectron spectroscopy using single-order high harmonic probe pulses. HONO is released 250 fs after photoexcitation.
Highlights
Volatile organic compounds (VOC) are molecules that are emitted into the atmosphere by human activities and that “cause damage to audible or visual senses” [1]
The proposed reaction scheme for the formation of HONO starting from o-NP is shown in Fig. 1 [6]: Upon photoexcitation, the molecule first undergoes excited state intramolecular proton transfer (ESIPT) from the hydroxyl to the nitro group
Calculations revealed that there are several competing processes such as direct return to the ground state within the singlet manifold, and the formation of HONO has never been observed in real time [7]
Summary
Volatile organic compounds (VOC) are molecules that are emitted into the atmosphere by human activities and that “cause damage to audible or visual senses” [1]. The proposed reaction scheme for the formation of HONO starting from o-NP is shown in Fig. 1 [6]: Upon photoexcitation, the molecule first undergoes excited state intramolecular proton transfer (ESIPT) from the hydroxyl to the nitro group. Calculations revealed that there are several competing processes such as direct return to the ground state within the singlet manifold, and the formation of HONO has never been observed in real time [7].
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