Detection of the Ethynyl Radical for Studies of the Chemistry of Soot Formation in Hydrocarbon Combustion: (Progress Report).

摘要

The purpose of this research program has been the performance of mass resolved resonance enhanced multiphoton ionization (REMPI) spectroscopy on species of importance in combustion with primary emphasis on the REMPI detection of photolytically produced C sub 2 H. A molecular beam, flash photolysis apparatus equipped with a time-of-flight mass spectrometer was constructed for the production and monitoring of REMPI ions. New electronic states of C sub 2 and HCO have been discovered with rotationally resolved REMPI spectroscopy. A weak, diffuse REMPI spectrum near 276 nm has been observed and tentatively assigned to the C sub 2 H radical. No other REMPI spectral features attributable to C sub 2 H were observed. 34 refs., 10 figs., 1 tab. (ERA citation 14:026851)