What absorbs at 1462 cm⁻¹ in an FTIR spectrum?
A band near 1462 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 1462 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.
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Alkyl C-H | 32 | 28 | 1.0 |
| Aromatic ring | 5 | 5 | 1.0 |
| Lipid | 4 | 4 | 1.0 |
| Amide | 4 | 4 | 1.0 |
| Carbohydrate | 3 | 3 | 1.0 |
| Alkene (C=C) | 3 | 2 | 1.0 |
| Methacrylate | 3 | 2 | 1.0 |
| Acetate | 3 | 2 | 1.0 |
| Hydroxyl (O-H) | 3 | 2 | 1.0 |
| Hydrogen bond | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Nucleic acid | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 1 | 1.0 |
| C-O single bond | 2 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Phospholipid | 1 | 1 | 1.0 |
| C=n | 1 | 1 | 1.0 |
| N h | 1 | 1 | 0.8 |
| Lignin | 1 | 1 | 0.8 |
| Protein | 1 | 1 | 0.7 |
| Chlorine | 1 | 1 | 0.6 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
Possible materials
| Material | Supporting peaks | Overlapping groups | Cited sources |
|---|---|---|---|
| microplastics | 1462, 1643, 1614 | Alkyl C-H, Aromatic ring | 1 |
| nanocomposite | 1462, 2921, 3300 | 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 1462 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.
Literature behind these assignments
-
Alkyl C-H confidence 1.0
“In cm-1 cm-1 particular, for PE at 710 and 719 (-CH rocking deformation), 2847 and 2915 particular, for PE at 710 and 719 cm-1 (-CH2 rocking deformation), 2847 and 2915 cm-1 (- 2 cm-1 (-CH symmetric and asymmetric stretching), 1462 and 1472”
Campanale 等 - 2023 - Fourier Transform Infrared Spectroscopy to Assess DOI: 10.3390/polym15040911 -
Alkyl C-H confidence 1.0
“The next band at 1462 (porcine, poultry, bovine, and ovine), ruminant lipids from -C-H bending vibrations was most likely assowere significantly different compared with nonruminant ciated with the fatty acid;”
Gao 等 - 2017 - Technical note Characterization of lipid constitu DOI: 10.2527/jas2016.1332 -
Alkyl C-H confidence 1.0
“LLM confirmed rule peak-group candidate”
Montenegro 等 - 2023 - Enzymatic and Synthetic Routes of Castor Oil Epoxi DOI: 10.3390/polym15112477 -
Aromatic ring confidence 1.0
“cm(cid:1)1 The FTIR analysis of the decayed and undecayed stretch in lignin and xylan, 1158 for COOOC wood blocks was performed by direct transmitvibration in cellulose and hemicellulose, cm(cid:1)1 tance with the KBr pellet technique with”
Examination of the lignin content in a softwood and a hardwood decayed by a brown-rot fungus with the acetyl bromide method and Fourier transform infrared spectroscopy DOI: 10.1002/pola.20071 -
Carbonyl (C=O) confidence 1.0
“FTIR spectra showed bands cm-1 at 1580-1654 referring to carbonyl and imine group and bands at 3500-3300 and 1462cm-1 13C 1264 related to vibration and deformation the amine group.”
Biological Properties Of Chitosan Derivatives Associated With The Ceftazidime Drug DOI: 10.1016/j.carbpol.2019.115002 -
Aromatic ring confidence 1.0
“It has been observed that certain Raman bands at 1462, 1331, and 1242 also had signifi cant conbands show enhanced intensities when aromatic ring tributions from lignin.”
Wang 和 Ren - 2009 - Surface deterioration of moso bamboo (Phyllostachy DOI: 10.1007/s10086-008-0994-0 -
Hydroxyl (O-H) confidence 1.0
“LLM confirmed rule peak-group candidate”
β-cyclodextrin coating: improving biocompatibility of magnetic nanocomposites for biomedical applications DOI: 10.1007/s10856-020-6361-4 -
confidence 1.0
“Explicitly stated paraffin peak”
Al Jedani 等 - 2020 - A de-waxing methodology for scanning probe microsc DOI: 10.1039/d0ay00965b
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