利用低溫間質隔離法和霍氏紅外光譜儀，在低於分解能閘的條件下以長波長的雷射光源，於波長553-593nm及488-514nm(連續式氬離子雷射激發染料雷射、脈衝式釔鋁石榴石雷射)範圍製備振動激態的NO2/C2H4/Ar，以進行氧原子的轉移反應。除了偵測到反應最終產物環氧乙烷及乙醛外，另有733、1664cm-1乃中間產物C2H4O因氬間質效應而和NO形成C2H4ONO的紅外吸收譜線。但在C2H2/NO2反應系統中則只觀測到包含C=O鍵結的產物。此種以高振動能來誘導氧原子轉移的反應方法將為雙分子反應提供一新的、更具有選擇性的反應途徑。 Oxygen atom transferred from NO2 to C2H4 was induced by laser excitation between 553-593 nm and 488-514 nm (below the dissociation threshold energy) in solid Ar. Continuous wave dye laserpumped by Ar ion laser and Nd: YAG laser were used as the photolysis sources and the reaction products were monitored by Fourier transform infrared spectroscopy method. The final products (ethylene oxide and acetaldehyde) were probed. Two new absorption peaks appeared at733, 1664 cm-1 were assigned to be the signals of C2H40NO, the product of the reaction inter-mediate C2H4O trpped by NO io Ar matrix. There was no new absorption appeared in NO2/C2H2/Ar reaction system. Anyway, the laser induced vibrational excited reaction pair would su-pport a controllable, selective reaction patheay for bimolection reaction system.
