氟里昂_(113)在多频强红外场离解过程中的V-V能量转移

V-V ENERGY TRANSFER IN DISSOCIATION PROCESS OF FREON 113 MOLECULES IN MULTIFREQUENCY INTENSE IR LASER FIELDS

用TEACO_2激光9P(24),9P(22),9P(20),9P(18)四支线组成的多频强红外场“超激发”氟里昂_(113)分子,使其达到很高激发态。由分解曲线可以看出CF_2Cl·CFCl_2与CF_3·CCl_3之间的V-V能量转移有明显的“虹吸”作用。从所得主要产物C_2P_6,C_2Cl_6,C_2F_4和C_2F_2Cl_2表明,离解过程中主要打断了CF_2Cl·CFCl_2及CF_3·CCl_3分子中具有较高键能的C—C键,而最低键能的C-Cl键开裂很少。我们还提出了在多频强红外场中氟里昂_(113)的离解机理,指出分子内的V-V能量转移是非随机化的。

Freon 113 molecules are superexited in multifrequency intense IR laser fields composed of 9P(24), 9P(22), 9P(20), 9P(18) lines of TEA CO2 laser, reaching very high exited states. It can be seen from the decomposition curve that a "siphonage effect" exists obviously in the V-V energy transfer between CF_2C1·CFC1_2 and CF_3·CCl_3 molecules. From the main products C_2F_6, C_2Cl_6, C_2F_4 and C2F2C1_2, it is shown that the C-C bonds having higher energy in CF_2Cl·CFCl_2 and CF_3·CCl_3 were mostly broken, but only a few C-Cl bands having lowest energy ruptured. We propose a dissociation mechanism of Freon 113 molecule in multifrequency intense IR fields, and indicate that intramolecular V-V energy transfer is not randomized.