60年代后期量子电子学的显著成就之一是发展了高能量的连续与脉冲二氧化碳激光器,可在9.2～11.0μ范围内调频,如采用不同同位素组成可扩大至8.3～12.5μ范围内调频。此波段与许多多原子分子如BCl_3,SF_6,NH_3,N_2F_4,PF_5,SiH_4,CH_3F,CH_3Br,C_2H_4,HCHO以及其它许多有机化合物分子的某一振动频率相共振,因此化学家们都想利用激光器的可调频单色性与高功率这两大特点来选择性激励化学反应。红外光化学与应用紫外及可见光激励化学反应不同,后者是分子吸收光量子后引起电子从一个分子轨道跃迁到另一个分子轨道,是电子态的激发。由于σ键的电子态激发需用真空 One of the remarkable achievements of quantum electronics in the late 1960s was the development of high-energy continuous and pulsed carbon dioxide lasers that can be tuned in the range of 9.2 to 11.0μ, such as using different isotopic composition to expand to 8.3 to 12.5μ. This band resonates with some of the vibrational frequencies of many polyatomic molecules such as BCl 3, SF 6, NH 3, N 2 F 4, PF 5, SiH 4, CH 3 F, CH 3 Br, C 2 H 4, HCHO and many other molecules of organic compounds, FM monochromatic and high power of these two characteristics to selectively stimulate the chemical reaction. Infrared photochemistry and the application of UV and visible light excitation chemical reaction is different, the latter is the molecular absorption of photons caused by electrons from one molecular orbital transition to another molecular orbit, is the electronic state of excitation. Due to the σ bond electronic state excitation requires vacuum