What absorbs at 1196 cm⁻¹ in an FTIR spectrum?
A band near 1196 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 6 cited sources
Quick answer
A band near 1196 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.
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Possible materials
| Matériel | Pics de support | Overlapping groups | Sources citées |
|---|---|---|---|
| PVA | 1196, 1660, 2930 | Acetate, Methacrylate, C-O single bond | 1 |
| polydopamine | 1196, 1543, 1707 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| CMC | 1196, 1423, 850 | C-O single bond | 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 1196 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.
Bibliographie derrière ces attributions
-
confiance 1,0
“While a little intense cm-1 feature ~ 1196 is attributed to the stretching/ vibration of Ti-O-C bonding between carbonyl”
Fast responsive anatase nanoparticles coated fiber optic pH sensor DOI: 10.1016/j.jallcom.2020.156246 -
Alkyl C-H confiance 1,0
“Another confirmation of FAME is with cm-1, stretching absorbance at 1196 is typical of CH group of biodiesel [31].”
Kanakdande 等 - 2019 - Pineapple Waste and Wastewater Route for Biodiese DOI: 10.1590/1678-4324-2019180499 -
Carboxyl (COOH) confiance 1,0
“cm-1 cm-1 2965.11 ±3000 (Strong & Board) -COOH (O-H Stretching) 2965.11cm-1 ±3000cm-1 -COOH(O-HStretching) (Strong&Board) 769.73cm-1 600cm-1 to800cm-1 cm-1 cm-1 cm-1 769.73 600 to 800 (Medium) -COOH (O-H Bending) -COOH(O-HBending) (Medium)”
Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985 -
Acetate confiance 1,0
“The intensity of the band at 1196 assigned to stretching in the -CN+-CH3 moiety, increases due to an increased substituted imine content in the oxidized film.”
Spectroelectrochemical studies of poly(N-methylaniline) formation, redox behaviour and degradation. A comparison with polyaniline DOI: 10.1016/j.electacta.2013.10.179 -
Acetate confiance 1,0
“cm-1 cm-1 For PEDOT:PSS, the peak around 3400 is due to the O-H stretching, the peak at 1645 is due cm-1 to the bending of the C=C group, peaks at 1196 and 1034 are due to the stretching of C-O-C bond, and cm-1 backbone34,35.”
Investigation on optical, structural and electrical properties of solid-state polymer nanocomposites electrolyte incorporated with Ag nanoparticles DOI: 10.1038/s41598-022-25304-0 -
Ester confiance 1,0
“While in the case of biodiesel, adsorption peak at cm-1 cm-1 at 1437 corresponding to methyl ester and peak appearing at 1196 for C-O ester bond”
Fe3O4-PDA-Lipase as Surface Functionalized Nano Biocatalyst for the Production of Biodiesel Using Waste Cooking Oil as Feedstock: Characterization and Process Optimization DOI: 10.3390/en13010177
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