CAJ | 학술논문

用放电 -LIF实验装置 ,对 CCl4/Ar混合气体放电产生 CCl2自由基 ,再用 541.52 nm激光将电子基态 CCl2激励到激发态 A 1B1(0,4,0)振动能级上 ,通过检测激发态 CCl2时间分辨荧光信号 ,测得室温下 CCl2(A 1B1)被烷烃类分子猝灭的实验结果 ,用我们提出的三能级模型分析处理实验数据 ,获得 CCl2(A 1B1)态和 CCl2(a 3B1)态的碰撞猝灭速率常数 kA和 ka值 .
용방전 -LIF실험장치 ,대 CCl4/Ar혼합기체방전산생 CCl2자유기 ,재용 541.52 nm격광장전자기태 CCl2격려도격발태 A 1B1(0,4,0)진동능급상 ,통과검측격발태 CCl2시간분변형광신호 ,측득실온하 CCl2(A 1B1)피완경류분자졸멸적실험결과 ,용아문제출적삼능급모형분석처리실험수거 ,획득 CCl2(A 1B1)태화 CCl2(a 3B1)태적팽당졸멸속솔상수 kA화 ka치 .
CCl2 free radicals were produced by dc discharge of CCl4(in Ar).Ground electronic state CCl2 radical was electronically excited to A 1B1 (0,4,0) state with Nd:YAG laser pumped dye laser at 541.52 nm.Experimental quenching data of CCl2 (A 1B1 and a 3B1) by alkanes were obtained by observing time resolved fluorescence from the excited CCl2 radicals transition,which showed a superposition of two exponential decay components.The state-resolved rate constants kA and ka were first time acquired by analyzing and treating these data by using three-level-model,which was put forward by us.kA and ka increase on the whole with increasing the number of C－ H bonds in alkanes.