自由基NCN與NO之反應動力學研究

Abstract

本研究利用雷射光解（laser photolysis）/雷射誘發螢光（laser-induced fluorescence）技術在298 K及41 - 600 torr之He中測量NCN自由基與NO之反應速率常數值。我們使用193 nm的雷射光來光解NCN3(cyanogen azide)以製造NCN自由基，接著以一道由Nd - YAG雷射抽提之染料雷射所發出之329 nm光來偵測NCN。結果顯示此反應具有壓力效應。 NCN3 + hν (193 nm) NCN + N2 (1) NCN + NO products (2) k2(298 K , 41 torr)=( 0.98 ± 0.12) × 10-12cm3molecule-1 s-1 經與Baren 和Hershberg15在298 K及3 - 600 torr之研究結果比較在298 K下他們所得的反應速率長數值k ( 298 K , 41 torr ) 約為 1 × 10-12cm3 molecule-1 s-1 與此研究所得之結果相近。

Kinetics of the Reaction of NCN Radials with NO Advisor：Dr. Niann S. Wang Deparement of Applied Chemistry , National Chiao Tung University Abstract Absolute rate constants for the reactions of NCN radicals with NO were determined 298 K and in 41 to 600 torr of He by means of the laser photolysis / laser induced fluorescence technique。NCN radicals were generated by 193 nm photolysis of NCN3。 NCN3 + hν (193 nm) NCN + N2 (1) NCN + NO products (2) k2(298 k,41 torr)=(0.98 ±0.12) ×10-12cm3 molecule-1 s-1 We obtained a pressure – dependent rate constant and which is in good agreement with a previous measurement15 。