Premium
Infrared multiphoton dissociation of acetic anhydride: Experimental study
Author(s) -
TianXiang Xiang
Publication year - 1990
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19900080405
Subject(s) - chemistry , infrared multiphoton dissociation , dissociation (chemistry) , photodissociation , excited state , ground state , infrared , acetic anhydride , photochemistry , population , fluorescence , wavelength , atomic physics , optics , catalysis , organic chemistry , physics , demography , sociology
The infrared multi‐photon dissociation (IRMPD) of acetic anhydride to generate state‐selected CH 2 has been investigated by using time and wavelength resolved fluorescence techniques. It has been observed that the generation of the nascent ground state CH 2 ( a 1 A 1 ) is delayed by about 0.6 μ relative to the onset time of the excited CH 2 ( b 1 B 1 ). The relative population of the ground and excited state CH 2 and the onset time for the appearance of the ground state CH 2 have been found to depend strongly on CO 2 laser output fluences. These results appear to have a strong bearing on the structure of the potential energy surfaces of the intermediate CH 2 CO. A possible photolysis mechanism is proposed to explain these experimental results.