Excited Triplet States of Polyatomic Molecules. II. Flash-Lamp Studies on Aromatic Ketones

Abstract

The apparatus for observing triplet-triplet transitions in polyatomic molecules is the same as in part I except that resonance lamps are here replaced by a flash lamp. Triplet-triplet spectra are reported for benzophenone, acetophenone, β-bromo and β-iodo naphthalene. No triplet-triplet absorption was found in benzene, biacetyl, acetone dibromo benzene, or diisopropyl ketone. Detailed studies of the energy levels of benzophenone and acetophenone are reported.