CCl2(A^1B1)自由基不同振动态的猝灭动力学

对CCl4/Ar混合气体直流脉冲放电产生CCl2自由基，再分别用波长为550.56nm,541.52nm,532.25nm,524.31nm,523.82nm和523.27nm的激光将电子基态CCl2激励到激发态A^1B1的(0,3,0),(0,4,0),(1,3,0),(0,6,0),(1,4,0),(2,2,0)振动态，激发态CCl2(A^1B1)的不同振动态的时间分辨荧光信号显示该信号呈双指数衰减，测得室温下CCl2(A^1B1)不同振动态被NH3,H2O,CH2Br2,NH(CH3)2,NH(C2H5)2,N(C2H5)3,n-C6H14等分子猝灭的实验结果，用三能级模型分析处理实验数据，获得态分辨速率常数kA和ka值，并对实验结果进行了讨论。

The collisional quenching of CCl2(A^1B1) in different vibrational states by quenchers

CCl 2 free radicals were produced by D.C. discharge of CCl 4(in Ar). Ground electronic state CCl 2 radical was electronically excited to A 1B 1 (0,3,0), (0,4,0), (1,3,0), (0,6,0), (1,4,0) and (2,2,0) vibronic states by Nd:YAG laser pumped dye laser at the wavelength of 550.56, 541.52, 532.25, 524.31, 523.82 and 523.37 nm, respectively. Experimental quenching rate data of CCl 2 (A 1B 1 and a 3B 1) by NH 3, H 2O, CH 2Br 2, NH(CH 3) 2, NH(C 2H 5) 2, N(C 2H 5) 3, and n-C 6H 14 were obtained by observing the time resolved fluorescence signals from the excited CCl 2 radical transitions, which showed a superposition of two exponential decay components. The state-resolved rate constants k A and k a were acquired by analyzing and dealing with these data by using three-level-model, which was put forward by us.