Inelastic electron tunnelling spectra of 3- and 4-nitrobenzoic acids and nitrobenzene

Abstract

Inelastic electron tunnelling spectra of 3- and 4-nitrobenzoic acids and nitrobenzene were measured in the range from 200 to 4000 cm −1. The spectra were compared with that of benzoic acid. An approximate assignment of the spectral peaks was carried out by applying the assignments of benzoic acid and nitrobenzene based mainly on i.r. and Raman results. A broad band of the NH stretching mode ( ca 3300 cm −1) in the spectra of nitrobenzene and 3-nitrobenzoic acid implies a reaction between the adsorbent and hydroxyl groups on the surface of the alumina layer.