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(1)在一大气压下,汞共振辐射中仅1849.6线能直接形成臭氧,2537.5线则不能。(2)氧中有 O_4或(O_2)_2分子时,对光化作用形成臭氧的效果并无影响。(3)根据本实验结果,可以推知2530线确如 Briner 等所指出,不能发生光化形成臭氧作用,Wulf.Herzberg.Rollefson 和 Burton 关于2530线形成臭氧的解释,也跟着失去了事实依据。在 Warburg 实验中可能实际起作用的为2138线并非2530线。(4)1849.6线形成臭氧的反应机构可能为:O_2(~3Σ_g~-)+1849.6→2O(~3P)O_2(~3Σ_g~-)+O(~3P)+M→O_3+M反应的量子总产率应略小于2,实测值为1.87。(5)在本实验情况下,形成臭氧的量子总产率随氧的流速的减小而有显著的减小,随温度的升高而稍减低,受氮冲淡的影响甚微。
(1) At atmospheric pressure, only 1849.6 lines of mercury resonance radiation can directly form ozone, while 2537.5 lines do not. (2) O_4 or (O_2) _2 in oxygen has no effect on the photochemical ozone formation. (3) Based on the results of this experiment, it can be inferred that the 2530 line does not act as photochemical ozone, as Briner et al. Have pointed out. The explanation by Wulf.Herzberg.Rollefson and Burton about the formation of ozone at line 2530 also follows the factual basis . The 2138 line that may actually work in the Warburg experiment is not a 2530 line. (4) The reaction mechanism for the formation of ozone at 1849.6 could be as follows: O_2 ~ 3Σ_g ~ - + 1849.6 → 2O ~ ~ 3P O_2 ~ 3Σ_g ~ - + O ~ 3P + M → O_3 + M reaction The quantum yield should be slightly less than 2, measured 1.87. (5) In this experiment, the total quantum yield of ozone formation decreased significantly with the decrease of oxygen flow rate, slightly decreased with increasing temperature and little affected by nitrogen dilution.