Electronic spectra of azanaphthalenes: Mixed crystal spectra of quinoxaline and quinoxaline-d6

The following spectra have been measured at 4 K, in three polarizations: 1B1(n,π∗) ← 1A1 absorption of quinoxaline in durene, durene-d14, naphthalene and naphthalene-d10, and of quinoxaline-d6 in durene and naphthalene. The polarized phosphorescence of quinoxaline-d6 in durene is also recorded.