POLARIZED ABSORPTION SPECTRA OF ACENAPHTHYLENE

The polarized absorption spectra of acenaphthylene in acenaphthene and in durene host crystals at low temperature are reported from 5000 Å to the matrix cut-off. In order of increasing energy, the electronic transitions are polarized along the long, short and long axes of the molecule. The first system contained many sharp lines which, in the acenaphthene matrix, were clearly separated into two groups corresponding to A1 ← A1 and B2 ← A1 vibronic transitions. The second and third electronic transitions were studied in a durene matrix. The lines were broad and a complete vibrational analysis was not attempted. © 1969.