Infrared spectra of photodimers of anthracene, benzo[a]anthracene, and tetracene

Infrared spectra of the photodimers of anthracene, anthracene-d10, tetracene, and benzo[a]anthracene are reported in the region 4000–200 cm−1. An attempt is made to correlate the observed bands with the proposed structure of the anthracene dimer. The infrared spectra indicate that the dimers of benzo[a]anthracene and tetracene have similar structures.