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- W2868244547 abstract "Abstract Marine aerosols consist of a variety of compounds and play an important role in many atmospheric processes. In the present study, sodium iodide clusters with their simple isotope pattern serve as model systems for laboratory studies to investigate the role of iodide in the photochemical processing of sea‐salt aerosols. Salt clusters doped with camphor, formate and pyruvate are studied in a Fourier transform ion cyclotron resonance mass spectrometer (FT‐ICR MS) coupled to a tunable laser system in both UV and IR range. The analysis is supported by ab initio calculations of absorption spectra and energetics of dissociative channels. We provide quantitative analysis of IRMPD measurements by reconstructing one‐photon spectra and comparing them with the calculated ones. While neutral camphor is adsorbed on the cluster surface, the formate and pyruvate ions replace an iodide ion. The photodissociation spectra revealed several wavelength‐specific fragmentation pathways, including the carbon dioxide radical anion formed by photolysis of pyruvate. Camphor and pyruvate doped clusters absorb in the spectral region above 290 nm, which is relevant for tropospheric photochemistry, leading to internal conversion followed by intramolecular vibrational redistribution, which leads to decomposition of the cluster. Potential photodissociation products of pyruvate in the actinic region may be formed with a cross section of <2×10 −20 cm 2 , determined by the experimental noise level." @default.
- W2868244547 created "2018-07-19" @default.
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- W2868244547 date "2018-07-27" @default.
- W2868244547 modified "2023-10-09" @default.
- W2868244547 title "Photodissociation of Sodium Iodide Clusters Doped with Small Hydrocarbons" @default.
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- W2868244547 doi "https://doi.org/10.1002/chem.201803017" @default.
- W2868244547 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6120481" @default.
- W2868244547 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29979470" @default.
- W2868244547 hasPublicationYear "2018" @default.
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