Primary Photochemical Processes in Glyoxal at 4358 Å

摘要: Quantum yields of CO and H2 have been measured in the gas‐phase photolysis with 4358‐A radiation at temperatures between 37° 207°C. φCO is generally about 0.6; φH2 0.01. The data suggest that 70% excited molecules cross to triplet state by a first‐order process, remaining singlet return ground fluorescence. principal reaction dissociation into HCHO, while small fraction are destroyed collision ground‐state glyoxal molecules. About 3% undergo intersystem crossing state, forming 55 kcal vibrational energy. These either dissociate or relax equilibrium heat‐bath At pressures near 100 Torr, where higher concentrations formed because increased absorption, reactions free radicals produced collisions bet...