Under UV light irradiation at 313 nm, a gaseous mixture of trimethylsilyl azide (TMSAZ) and acrolein (AC) produced sedimentary aerosol particles with a mean diameter of 0.74 µm. From the chemical analysis of the product by FT IR spectroscopy, TMSAZ was found to be incorporated into the sedimentary particles of polyacrolein by forming Si-0 bond. Gas-phase chemical reaction between TMSAZ and AC was observed in the dark, and was investigated from the analysis of volatile products by GC/MS and FT IR spectra; as a final product, hexamethyldisiloxane was identified. High chemical reactivity of TMSAZ towards AC was applied to modify the surface character of polyacrolein particles.
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