[Influence of substituents on IR spectrum of aromatic amines in different solvents].

The 21 aromatic amines in different solvents are studied by FTIR, and the influence of substituents on the vibrational absorption, symmetric stretching frequency(nu s) and anti-symmetric stretching frequency(nu as) is investigated. The substituent of methyl has different electrical effects in organic solvent with various polarities. The electric effects of methoxy in ortho-position differ from that in meso-position. The functional groups of chloro- and nitro-cause the nu as and nu s of amino group a hyposochromic shift, while substituent of-NH2 makes the nu as and nu s of amino group a bathochromic shift.