Artículo de revista
Structure correlation of silylated dicarboxylic acid monomer and its respective oligomeric polyamide-imide using experimental and theoretical vibrational spectra
Fecha
2017Registro en:
Spectroscopy Letters, Volumen 50, Issue 1, 2017, Pages 30-38
15322289
00387010
10.1080/00387010.2017.1282523
Autor
González Henríquez, Carmen M.
Terraza, Claudio
Sarabia, Mauricio
Vera, Alejandra
Aliaga Cerón, Álvaro
Institución
Resumen
Correlation between theoretical and experimental (infrared and Raman spectroscopies) vibrational spectra of two compounds, both with a silyl group present in their main chain and with an optically active structure (L-valine) as side group, was performed. These compounds are based in a chiral dicarboxylic acid monomer and its respective polyamide-imide, oligomer that was previously synthesized by a direct polycondensation. Spectra were recorded in the region comprised between 500 and 4000 cm(-1) for infrared and Raman analysis. The Raman spectra were obtained through a 1064 nm laser as excitation source.
Theoretical models were carried out in order to find the optimal molecular geometry of the analyzed systems, with a complete assignment of their vibrational spectra. The Raman experimental data obtained with a Nd:YAG laser for this kind of silylated organic compounds, and the comparison between these results with the theoretical data is a useful advance in the polymer synthesis field, which can be used as reference for subsequent studies.