Open AccessCOLLISION INDUCED DISSOCIATION (CID) (Ⅱ)——THE STUDY OF THE COLLISION-INDUCED QUENCHING MECHANISM OF I2(B3∏o+u) AT HIGH VIBRIONAL LEVEL V′=62
Author(s) -
TianXiang Xiang,
Chongde Li,
Wang Li-Zong,
Min Wang,
Ying Huang
Publication year - 1990
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.39.726
Subject(s) - dissociation (chemistry) , metastability , quenching (fluorescence) , collision induced dissociation , molecule , collision , intermolecular force , chemical polarity , fragmentation (computing) , atomic physics , dipole , materials science , fluorescence , chemical physics , chemistry , photochemistry , mass spectrometry , physics , tandem mass spectrometry , organic chemistry , chromatography , quantum mechanics , computer security , computer science , operating system
This paper covers our recent study of the quenching processes of I2(B3Πo+u) at high vi-brational level v′= 62. In the experiments, quenching rate constants of I2* with itself and with other molecules (He, Ar, Kr, H2, CO, N2, O2, CH4, NH3, C2H6) were determined, and it was found that in the collision process of I2* and NH3, the formation of the metastable complex (I2*…NH3) might be one of the major processes for fluorescence quenching. The quenching efficiency of the polar molecule, CO, is larger than other molecules, such as the :isoelectronic molecule, N2, showing that intermolecular dipole-induced dipole interaction may play an important role in enhancing the molecular quenching. More important, the theory for collision-induced dissociation (CID) proposed in paper 1 can satisfactorily model the experimental results, indicating strongly that in such high vibrational level, collision-induced direct dissociation is the dominant path.