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用266nm激光光解CHBr_3产生CH自由基,利用精密控温仪控制反应温度,测定CH(A→X)荧光的时间分辨信号,测量了290K至653K范围内CH(A)被乙醇、丙醇、丁醇猝灭的速率常数,利用修正的碰撞配合物模型,定性解释了在多极吸引势与活化势垒的双重影响下,猝灭截面与温度间的关系.
The CH radical was generated by photolysis of CHBr_3 with 266 nm laser and the temperature was controlled by a precision temperature controller. The time resolved signal of CH (A → X) fluorescence was measured. The CH (A) in the range of 290 K to 653 K was measured by ethanol, propanol, Butanol quenching rate constant, using the modified collision complex model, qualitatively explained the relationship between the quenching cross-section and temperature under the dual influence of the multipole attraction potential and the activation barrier.