The ir absorption spectra of the isomeric aminophenols have been recorded in the range 250–4000 cm−1. The observed bands have been analyzed in terms of fundamentals, combinations, and overtones of a number of frequencies. These frequencies have been assigned to different modes of vibrations.
V. N. Verma and D. K. Rai, "Vibrational Spectra of Isomeric Aminophenols," Appl. Spectrosc. 24, 445-449 (1970)