Branched Polyamines Functionalized with Proposed Reaction Pathways Based on ¹H-NMR, Atomic Absorption and IR Spectroscopies

Abstract

Three novel branched polyamines <i>N</i>,<i>N</i>,<i>N</i>’,<i>N</i>’-tetrakis-[3((pyridine-2-methyl)-amine) propyl]-1,4- butanediamine (1), <i>N</i>,<i>N</i>,<i>N</i>’,<i>N</i>’-tetrakis-[<i>N</i>-((2-methylpyridine)ethyl)propanamide]ethylenediamine (2) and N,N,N’,N’-tetrakis-[3((2-hidroxibenziliden)-amine)propyl]-1,4-butanediamine (3), were synthesized starting from 2-pyridinecarboxaldeyde with DAB-Am-4 for 1, PAMAM G0 for 2 and from salicylaldehyde with DAB-Am-4 for 3. The pathway reactions have been proposed by ¹H-NMR, IR and Atomic Absorption Spectroscopy. The optimal reaction time was set by IR spectroscopy following aldehyde peak modification. 1 and 2 were obtained as both hydrochlorides and as free amines and 3 only as free imine. These polyamines were characterized by UV-Vis, IR, ¹H-NMR and ¹³C-NMR and Mass Spectrometry.