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題 名 | Transient Frequency Modulation Spectroscopy and 266 nm Photodissociation of Bromoform |
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作 者 | 劉玟玲; 張伯琛; | 書刊名 | Journal of the Chinese Chemical Society |
卷 期 | 48:3 2001.06[民90.06] |
頁 次 | 頁613-617 |
分類號 | 340 |
關鍵詞 | HCBr; Bromoform; Photodissociation; Transient spectroscopy; Frequency modulation; |
語 文 | 英文(English) |
英文摘要 | A high-resolution absorption spectrometer, based on the combination of frequency-modulation (FM) and diode laser techniques, has been constructed to investigate the reaction intermediates in the 266 nm laser photolysis of bromoform (CHBr3). The absorption spectrum of HCBr corresponding to the electronic transition was successfully obtained. We also found that the nascent HCBr is electronically excited. These data indicate that in the reaction pathway we observed, the first step of the 266 nm photolysis is a two-photon process and HCBr is one of the primary intermediates. The electronically excited HCBr absorbs one or two more photons to produce the electronically excited CH radical. |
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