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Visible-light-Induced Reaction of an Ozone-Trimethylamine Complex Studied by Matrix-Isolation IR and Visible
Kentaro Kamata1, Rengo Yoshioka1, Nobuyuki Akai1
1Graduate School of BASE (Bio-Applications and Systems Engineering), Tokyo University of Agriculture and Technology, Naka-cho, Koganei, Tokyo 184-8588, Japan.
Abstract:
A visible-light-induced reaction of an O3-trimethylamine (TMA) complex isolated in low-temperature noble-gas matrices is investigated by infrared (IR) and visible absorption spectroscopies using the DFT calculation. The complex isolated in a Ne matrix yields trimethylamine-N-oxide (TMAO) upon irradiation (λ ≥ 800 nm) by dissociation of O3. When the wavelength of radiation is changed to λ = 455 nm, two stable conformers of dimethylaminomethanol (DMAM) are recognized besides TMAO. In an Ar matrix, DMAM and not TMAO is mainly produced upon λ = 455 nm irradiation. The photoreaction mechanism of the O3-TMA complex with a single collision reaction between O(3P) and TMA in the gas phase to produce OH and CH2N(CH3)2 radicals is discussed.
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