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Two‐Photon Spectroscopy of Acetylene ‐ Photodissociation Processes at 9‐10 eV Energy Levels
Author(s) -
Lee IngFang,
Lee YuanHsiang,
Hsu YenChu
Publication year - 1990
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199000027
Subject(s) - chemistry , photodissociation , acetylene , excited state , atomic physics , excitation , spectroscopy , hydrogen , two photon excitation microscopy , photon energy , photon , photochemistry , physics , optics , organic chemistry , quantum mechanics
The gerade states of acetylene at 9‐10 eV have been studied by monitoring the C 2 emission. Larger Δv 2 excitations are seen than previously reported by Ashfold et al. The observed two‐photon resonant levels show extensive predissociation. Experimental evidence from the two‐color photofragment excitation measurement is given to support the conclusion that the excited‐state ethynyl radical and atomic hydrogen are the corresponding predissociation products. Most C 2 emissions seen in this work are due to the subsequent photodissociation of the intermediate C 2 H to C 2 (d 3 Π g ).