Thakur, SK and Raviteja, S and Guru Row, TN and Eswaran, SV (2023) Base-Catalyzed Polymerization of a Substituted Methylenebicyclo3.3.1nonane. In: International Journal of Polymer Science, 2023 .
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Abstract
Lignite humic acid on reaction with formaldehyde and aqueous alkali led to a polybicyclo3.3.1nonane. This was characterized spectroscopically using mass spectrometry, FT-IR, powder X-ray diffraction, TEM, and NMR studies (1H-NMR, CP-MAS-SS-NMR) which though challenging were useful for confirming the structure of the BCN polymer. The product showed an envelope peak in its MALDI-MS spectrum, based on which MCombining overlinen, MCombining overlinew, and polydispersity index have been calculated. Based on the NMR spectrum of intermediate, the presence of the N-formyl group has been shown in it. The new polymer could be useful in agriculture in water-deficient areas. Most papers on humic acids include only broad and general information like elemental analysis (occasionally TEM, SEM, TGA, DSC, etc.). Very complicated structures have been proposed by scientists earlier. Only in very recent years, it has been recognized that these are relatively small molecules which masquerade as supramolecular structures. It is pointed out that most papers do not put down the structure of the compound and provide no concrete proof for proposing such structures. The novelty of our work is that we have characterized the precise molecular weights based on mass spectrometry and NMR spectroscopy along with a well-defined structure. This is not the case in most other publications. © 2023 Sujeet Kumar Thakur et al.
| Item Type: | Journal Article |
|---|---|
| Publication: | International Journal of Polymer Science |
| Publisher: | Hindawi Limited |
| Additional Information: | The copyright for this article belongs to Author. |
| Keywords: | Nuclear magnetic resonance spectroscopy; Organic acids, 1H NMR; Base catalyzed; Catalyzed polymerization; Humic acid; MALDI-MS; NMR spectrum; NMR studies; Polydispersity indices; Spectra's; X-ray diffraction studies, Mass spectrometry |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 04 Mar 2024 09:40 |
| Last Modified: | 04 Mar 2024 09:40 |
| URI: | https://eprints.iisc.ac.in/id/eprint/84379 |
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