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Abstract. Uptake coefficients of 03 on NaC1 and synthetic sea salt (SSS) were found to be enhanced from < 10 -5 to • 3.5 x 10 -2 in the presence of water-soluble Fe 3+ in the Fe/Na weight ratio larger than 0.1%. C12 release was observed without radiation in the reaction of 03 and a FeC13/NaC1 mixture with surface adsorbed water at the yields of 0.48 and 0.28 for Fe/Na ratio of 1.0 and 0.5 weight %, respectively. Only Br2 release was observed for a FeC13/SSS sample. These results imply that when bromide is deficient in sea salt, C12 would be released from the sea salt with the coexistence of Fe 3+. The estimate was made to show that the C12 releasing rate can be high enough to explain sporadically observed C12 at nighttime in a coastal area.

A coaxial infrared laser−ion beam photoabsorption spectrometer was constructed for the measurement of the vibrational spectrum of an acrylonitrile cluster cation, (CH2CHCN) n + (n = 3−10), by detecting photodissociation products of the cluster ion in the wavenumber range of 925−1090 cm-1. All the spectra measured in this n-range have an intense peak at 970 cm-1, which is associated with a CC−H out-of-plane vibration of an acrylonitrile molecule in the cluster ion. The comparison of the spectra with an ab initio calculation shows that the cluster ion consists of a dimer ion core solvated with neutral acrylonitrile molecules. On the other hand, the acrylonitrile cluster anions did not exhibit any optical absorption in the wavenumber range studied. This finding is consistent with our previous result that intracluster polymerization takes place when an electron is attached onto a neutral cluster of acrylonitrile.