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Structure correlation of silylated dicarboxylic acid monomer and its respective oligomeric polyamide-imide using experimental and theoretical vibrational spectra.
- Source :
-
Spectroscopy Letters . 2017, Vol. 50 Issue 1, p30-38. 9p. - Publication Year :
- 2017
-
Abstract
- 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−1for 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *DICARBOXYLIC acids
*POLYAMIDES
*VIBRATIONAL spectra
*SILYL group
*POLYCONDENSATION
Subjects
Details
- Language :
- English
- ISSN :
- 00387010
- Volume :
- 50
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Spectroscopy Letters
- Publication Type :
- Academic Journal
- Accession number :
- 121745967
- Full Text :
- https://doi.org/10.1080/00387010.2017.1282523