F~2, F与I~2的化学发光反应

在流动余辉实验装置上,研究了F~2,F与I~2的化学发光反应。首次在F+I~2反应体系中观察到较强的IF(B→X)发射光谱,采用简单碰撞理论对IF(B)的振动驰豫进行估算后,得到了其振动布居,发现与F~2+I~2反应体系有明显的不同,从而推测这两个反应的激发态产物IF(B)是由不同的反应通道形成的。前者由初级反应产物I~2F与F原子进一步作用产生,而后者则由激发态的I(^2p~1~/~2)与基态的F(^2p~3~/~2)碰撞复合产生。

Chemiluminescent reactions of F~2 and F atoms with I~2 molecules

In order to obtain high concentration of IF(B) through chemical ways, we studied the chemiluminescent reactions of F2, F with I2 in the flowing afterglow apparatus. Strong emission spectrum IF(B- X) was firstly observed in the F/I2 system. Simple collision theory was used to estimate the IF(B) vibrational energy relaxation in inert gas. The vibrational population distribution of the excited state IF (B) was measured. Compared the IF (B) vibrational distribution of different systems, we conclude that IF(B) were produced through different reaction mechanisms in the reactions of F2, F with I2. The former proceeds via a secondary, reactive encounter of the F atom with the stable thrialogen intermediate I2F, whearas the latter may be the recombination reaction of spin - orbit excited iodine atoms with ground fluorine atoms.