What absorbs at 1253 cm⁻¹ in an FTIR spectrum?
A band near 1253 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 8 cited sources
Quick answer
A band near 1253 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 |
|---|---|---|---|
| Methacrylate | 8 | 8 | 1,0 |
| Acetate | 8 | 8 | 1,0 |
| C-O single bond | 7 | 7 | 1,0 |
| Methoxy (OCH3) | 7 | 7 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 2 | 1,0 |
| Methyl | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Silicon carbon | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 1,0 |
| Thiocarbonyl | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| N h | 1 | 0 | 1,0 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
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 1253 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
-
Acetate confiance 1,0
“The band 1253cm-1 is assigned for the C-O stretching between at”
Das 等 - 2004 - Kinetics and adsorption behaviour of salicylate on DOI: 10.1016/j.colsurfa.2004.02.010 -
Acetate confiance 1,0
“cm-1 agave is carried out in masonry ovens at a temperature The peak at 1253 was related to C-O and Ccm-1 of 95 °C for a period time between 28 and 48 h.”
Mondragon-Cortez 等 - 2022 - Application of Fourier transform infrared spectros DOI: 10.24275/rmiq/Alim2806 -
Carboxyl (COOH) confiance 1,0
“The peak observed at 1253 cm-1 can be assigned to the -COO (ester) group [61].”
Cheng 等 - 2019 - Extraction of Humic Acid from Lignite by KOH-Hydro DOI: 10.3390/app9071356 -
Acetate confiance 1,0
“A saturated absorption bands at 1253 (SO symmetry stretching) for AS cm(cid:1)1 (C-O-C”
A KBr-impregnated paper substrate as a sample probe for the enhanced ATR-FTIR signal strength of anionic and non-ionic surfactants in an aqueous medium DOI: 10.1039/d0ra07286a -
Acetate confiance 1,0
“cm-1 (O-H stretching vibration), 2915 cm-1 (-CH2), absorption peaks for CA were observed at 3285 cm-1 peaks for CA were observed at 3285 (O-H stretching vibration), 2915 (-CH 2), 1584 cm-1 cm-1 1584 cm-1 (C=O stretching vibration) [36], 125”
Liu 等 - 2018 - Highly Efficient Flame Retardant Hybrid Composites DOI: 10.3390/polym10060625 -
Carboxyl (COOH) confiance 1,0
“associated with the weak band at 1734 cm-1 due to aldehyde C = O stretching), 1321 cm-1, cm-1 cm-1, associated with the weak band at 1734 due to aldehyde C = O stretching), 1321 1253 cm-1 due to stretching of O-C of carboxylic acids and der”
Popa 等 - 2022 - Influence of Convective and Vacuum-Type Drying on DOI: 10.3390/molecules27134063 -
Thiocarbonyl confiance 1,0
“The absorption peaks are observed in the pure ligand at 1253 cm-1 and 802 cm-1 which can be related to the ν(C=S).”
Rogalewicz 等 - 2022 - Antitumor Activity and Physicochemical Properties DOI: 10.3390/molecules27092703 -
Fluorine (C-F) confiance 1,0
“A shoulder appearing at approximately 1265 cm-1 is due to the asymmetric vibration of the CF2 peak which was reported to be at 1253 cm-1[26].”
Fabrication of PECVD-grown fluorinated hydrocarbon nanoparticles and circular nanoring arrays using nanosphere lithography DOI: 10.1016/j.apsusc.2007.11.053
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