What absorbs at 1464 cm⁻¹ in an FTIR spectrum?
A band near 1464 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 1464 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 | 26 | 24 | 1.0 |
| Methoxy (OCH3) | 6 | 6 | 1.0 |
| Methacrylate | 6 | 6 | 1.0 |
| Acetate | 6 | 6 | 1.0 |
| Methyl | 4 | 4 | 1.0 |
| Amide | 3 | 3 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Carbonate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Lipid | 2 | 1 | 1.0 |
| Lignin | 1 | 1 | 1.0 |
| Nitrogen heterocycle | 1 | 1 | 1.0 |
| Fatty acid | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Silicon carbon | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Chlorine | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Quinone | 1 | 1 | 1.0 |
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 |
|---|---|---|---|
| PEG | 1464, 1650, 1342 | Alkyl C-H, Methacrylate, Acetate | 1 |
| graphene oxide | 1464, 1150, 3400 | Methacrylate, Acetate, Alkyl C-H | 1 |
| Fe3O4 | 1464, 2358, 1673 | Alkyl C-H, Methacrylate, Acetate | 1 |
| polyaniline | 1464, 1565, 1570 | Alkyl C-H, Methacrylate, Acetate | 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 1464 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
“(-CH stretching/ 1464.”
Cahyono 等 - 2018 - Characteristics of eugenol loaded chitosan-tripoly DOI: 10.1088/1757-899X/349/1/012010 -
Alkyl C-H confidence 1.0
“The peak at 1486 cm-1 of ODA belongs to the C-H bend, and it moves to 1464 cm-1 in cm-1 cm-1 The bands at 1717 and 1060 corresponding to carboxyl and epoxide were weakened functionalized GO.”
Daud 等 - 2017 - Functionalizing Graphene Oxide with Alkylamine by DOI: 10.3390/nano7060135 -
Alkyl C-H confidence 1.0
“The peaks cm-1 cm-1 at 1464 and 1339 are due to C-H bending vibrations.”
Formulation and Characterization of Fe3O4@PEG Nanoparticles Loaded Sorafenib; Molecular Studies and Evaluation of Cytotoxicity in Liver Cancer Cell Lines DOI: 10.3390/polym15040971 -
Alkyl C-H confidence 1.0
“cm-1 cm-1, cm-1 cm-1 1351.855 for CH wagging, 1517.703 1538.917 and 1646.911 for amide II and amide 2 cm-1 I as well as the peak at 1463.706 assigned to CH scissoring mode of the acyl chain of lipids.”
Ghassemi 等 - 2021 - Diagnosis of normal and malignant human gastric ti DOI: 10.1016/j.molstruc.2020.129493 -
Quinone confidence 1.0
“The change in degree of oxidation may also lead main peaks consistent with quinone and benzene ring deforma1564.7cm-1 1464.0cm-1 to change in electrical conductivity of polyaniline which again tions are observed at and [15,36].”
Raigaonkar 等 - 2011 - Structural and spectral investigations of anthrace DOI: 10.1016/j.synthmet.2010.12.002 -
Alkyl C-H confidence 1.0
“The peaks at 1464 and 1377 194 Pre-pro corresponded to the bending vibrations of the methylene (-CH 2) and methyl (-CH 3) 195 cm-1 bending vibrations (Jamwal, et al., 2020).”
Rapid and accurate monitoring and modeling analysis of eight kinds of nut oils during oil oxidation process based on Fourier transform infrared spectroscopy DOI: 10.1016/j.foodcont.2021.108294 -
confidence 1.0
“739 Alkyl halides C-Cl stretch (1616cm-1 (1464cm-1 extracts (72.36%) were slightly active and revealed notable ), aromatic compounds”
Ahmad 等 - 2016 - In Vitro Antimicrobial Bioassays, DPPH Radical Sca DOI: 10.1155/2016/3818945 -
Alkene (C=C) confidence 1.0
“The presence of peaks at cm-1 cm-1 2917 (sym) and 2842 (asym) confirmed the presence of aliphatic CH 2 cm-1 groups, and the band at 1464 is attributed to the deformation of the C=C bond.”
Algarra 等 - 2018 - Enhanced electrochemical response of carbon quantu DOI: 10.1016/j.talanta.2017.09.082
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