Visible-light-Induced Reaction of an Ozone－Trimethylamine Complex Studied by Matrix-Isolation IR and Visible Absorption Spectroscopies
Visible-light-Induced Reaction of an Ozone－Trimethylamine Complex Studied by Matrix-Isolation IR and Visible Absorption Spectroscopies
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通过基质隔离红外和可见吸收光谱研究臭氧－三甲胺配合物的可见光诱导反应
DOI：
10.1021/acs.jpca.0c08965
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Munetaka Nakata
中科院分区：
文献类型：
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作者：
Kentaro Kamata;Rengo Yoshioka;Nobuyuki Akai;Munetaka Nakata
采用DFT方法，通过红外光谱和可见光吸收光谱研究了低温惰性气体中O3-三甲胺（TMA）配合物的可见光诱导反应.在Ne基质中分离的复合物在照射（λ ≥ 800 nm）时通过O3的解离产生三甲基胺-N-氧化物（TMAO）。当辐射波长改变到λ = 455 nm时，除了TMAO外，还发现了两种稳定的二甲氨基甲醇（DMAM）构象。在Ar基体中，当λ = 455 nm照射时，主要产生DMAM而不是TMAO。讨论了O3-TMA配合物的光反应机理，即O（3 P）与TMA在气相中发生单一碰撞反应生成OH和CH 2N（CH 3）2自由基.
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)2radicals is discussed.