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- W4387582068 abstract "Lignite humic acid on reaction with formaldehyde and aqueous alkali led to a polybicyclo[3.3.1]nonane. 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 <math xmlns=http://www.w3.org/1998/Math/MathML id=M1> <mover accent=true> <mrow> <mi>M</mi> </mrow> <mo>̅</mo> </mover> <msub> <mrow /> <mrow> <mtext>n</mtext> </mrow> </msub> </math> , <math xmlns=http://www.w3.org/1998/Math/MathML id=M2> <mover accent=true> <mrow> <mi>M</mi> </mrow> <mo>̅</mo> </mover> <msub> <mrow /> <mrow> <mtext>w</mtext> </mrow> </msub> </math> , 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." @default.
- W4387582068 created "2023-10-13" @default.
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- W4387582068 date "2023-10-12" @default.
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- W4387582068 title "Base-Catalyzed Polymerization of a Substituted Methylenebicyclo[3.3.1]nonane" @default.
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- W4387582068 doi "https://doi.org/10.1155/2023/5580382" @default.
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