Anthracene fluorescence at low temperatures. II. Doped single crystals

Abstract

By the addition of dopants to single crystal anthraoene it is shown that many of the fluorescence bands additional to exciton emission are due to traces of 2-methylanthracene. Other impurity bands, apparently arising from locally disorientated host molecules, appear on doping with most of the following, the effects increasing in the order given: carbazole, biphenyl, p-terphenyl, anthraquinone, naphthalene, naphthacene, phenanthrene, pyrene, chrysene. The host vibronic bands were virtually unaffected by dopants, except for small line shifts in the presence of 2-methylanthracene.