American Journal of Analytical Chemistry, 2014, 5, 1090-1101 Published Online November 2014 in SciRes. http://www.scirp.org/journal/ajac http://dx.doi.org/10.4236/ajac.2014.516116 How to cite this paper: Cervantes-Mejía, V., et al. (2014) Branched Polyamines Functionalized with Proposed Reaction Pathways Based on 1 H-NMR, Atomic Absorption and IR Spectroscopies. American Journal of Analytical Chemistry, 5, 1090-1101. http://dx.doi.org/10.4236/ajac.2014.516116 Branched Polyamines Functionalized with Proposed Reaction Pathways Based on 1 H-NMR, Atomic Absorption and IR Spectroscopies Vicente Cervantes-Mejía, Elizabeth Baca-Solis, Judith Caballero-Jiménez, Rosario Merino-García, Jesús Cruz-Gatica, Gabriela Moreno-Martínez, Yasmi Reyes-Ortega Chemical Center, Sciences Institute, Autonomous University of Puebla, Puebla, México Email: yasmi.reyes@correo.buap.mx Received 11 September 2014; revised 27 October 2014; accepted 11 November 2014 Copyright © 2014 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). http://creativecommons.org/licenses/by/4.0/ Abstract Three novel branched polyamines N,N,N’,N’-tetrakis-[3((pyridine-2-methyl)-amine) propyl]-1,4- butanediamine (1), N,N,N’,N’-tetrakis-[N-((2-methylpyridine)ethyl)propanamide]ethylenediamine (2) and N,N,N’,N’-tetrakis-[3((2-hidroxibenziliden)-amine)propyl]-1,4-butanediamine (3), were syn- thesized 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 1 H-NMR, IR and Atomic Absorption Spectroscopy. The optimal reaction time was set by IR spectroscopy fol- lowing aldehyde ( ) C O st ν = 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, 1 H-NMR and 13 C-NMR and Mass Spectrometry. Keywords Branched Polyamines, Functionalization Reactions, IR, NMR, Atomic Absorption Spectroscopy 1. Introduction Since the synthesis of the first branched polyamines in the late 1970s, these repetitively three-dimensional polymers have provided a rich seam of research due to their wide range of applications [1] [2]. The branched polymers can be used as low-dielectric materials [3], as templates for the growth of single-wall carbon nano- tubes [4], as catalysts [5] [6], as biosensors [7], as optoelectronic devices [8] [9] as well as in biological applica-