What absorbs at 2967 cm⁻¹ in an FTIR spectrum?
A band near 2967 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 3 cited sources
Quick answer
A band near 2967 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| Alkyl C-H | 3 | 2 | 1,0 |
| Methyl | 3 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Possible materials
| Materiāls | Atbalstošie pīķi | Overlapping groups | Citētie avoti |
|---|---|---|---|
| PVDF | 2967, 1160, 840 | Alkyl C-H, Methacrylate | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
Spectrum logic
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 2967 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
Literatūra aiz šiem piešķīrumiem
-
Alkyl C-H pārliecība 1,0
“In the pristine electrode, peaks at 2967, 2923, 2877, and 1M LiTFSI BMP-TFSI + 10 wt % FEC 1 M LiTFSI BMP-TFSI + 10 wt.% FEC cm-1 1402 are characteristic of ν(C-H) and δ(C-H) of the -CH 2-”
Kim 等 - 2011 - Study on the Cycling Performance of Li4Ti5O12 Elec DOI: 10.5012/bkcs.2011.32.1.105 -
Acetate pārliecība 1,0
“Journal of Medical Physics ¦ Volume 46 ¦ Issue 4 ¦ October-December 2021 255 Łach, et al.: First identification of the effects of LF-EMF on the micromolecular changes in AT-MSCs by FTIR spectroscopy Morphology of adipose tissue-mesenchymal”
Lach 等 - 2021 - First Identification of the Effects of Low Frequen DOI: 10.4103/jmp.jmp_57_21 -
Methyl pārliecība 0,9
“Text: 'methyl at 2967'.”
Synthesis and thermal properties of bisphthalonitriles containing aromatic ether nitrile linkages DOI: 10.1016/j.polymdegradstab.2009.09.006
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