What absorbs at 2013 cm⁻¹ in an FTIR spectrum?
A band near 2013 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 2013 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Carbohydrate | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 1 | 1,0 |
| Methacrylate | 2 | 1 | 1,0 |
| C-O single bond | 2 | 1 | 1,0 |
| Acetate | 2 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Carbon dioxide | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| Fatty acid | 1 | 1 | 1,0 |
| Silicon silicon | 1 | 1 | 1,0 |
| Hydrogen bond | 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 |
|---|---|---|---|
| Cellulose | 2013, 1735, 1650 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| nanocomposite | 2013, 2921, 3300 | Hydroxyl (O-H), Alkyl C-H | 1 |
| PVA | 2013, 1660, 2930 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| soil | 2013, 575, 1240 | Hydroxyl (O-H), Alkyl C-H | 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 2013 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
-
Hydroxyl (O-H) confiance 1,0
“After subtracting the spectra of pure water, positive peaks on the high wavenumber side and negative peaks on the low wavenumber side of the O-H stretching bands are 2013”
Chen 等 - 2004 - ATR-FTIR spectroscopic studies on aqueous LiClO4, DOI: 10.1039/B311768E -
Carbohydrate confiance 1,0
“lignin and hemicellulose band in spectra and stable 2013.”
Khorairi 等 - 2020 - Cellulose Powder from Piper nigrum L. Agro-Industr DOI: 10.17576/jsm-2020-4908-17 -
confiance 1,0
“Turche22.5(cid:3) 41.1(cid:3) (2u) analysis revealed PNEA and iron peaks at and , 2013, 2692-2702.”
Synthesis, characterization, and application of poly \(N-ethyl aniline\)/iron nanocomposite DOI: 10.1080/15533174.2016.1186083 -
Carbohydrate confiance 1,0
“It is also worthy to note that the glycogen bands Springer, 2013.”
Rapid approach to analyze biochemical variation in rat organs by ATR FTIR spectroscopy DOI: 10.1016/j.saa.2013.09.131 -
Alkyl C-H confiance 1,0
“The dissolution ratio of CG-g-PVA to C H stretching (Hezaveh & Muhamad, 2013).”
Synthesis and properties of carrageenan grafted copolymer with poly(vinyl alcohol) DOI: 10.1016/j.carbpol.2013.06.047 -
Hydrogen bond confiance 1,0
“Because the hydrogen bond-induced intensity enhancement is much less pronounced for Raman scattering than for IR, the two monomer bands eq 2013.”
Altnoeder 等 - 2013 - Chirality-dependent balance between hydrogen bondi DOI: 10.1039/c3cp50708d -
Acetate confiance 1,0
“(2013) 824-1,070 4 1,026 -C-O stretch Bernier et al.”
Anwar-ul-Haq 等 - 2022 - Role of Bacterial Consortium and Synthetic Surfact DOI: 10.3389/fenrg.2022.874492 -
Silicon silicon confiance 1,0
“As detailed 3\\SiHmoietiesgivebandsintherange2000talwavenumbers(e.g.Si Si\\H below for stretching mode, this shift results from the enhance2013cm-1[46])canbeexplainedbyusingtheCardonamodel[51,52].”
Vibrational frequencies of hydrogenated silicon carbonitride: A DFT study DOI: 10.1016/j.surfcoat.2017.06.017
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