What absorbs at 1466 cm⁻¹ in an FTIR spectrum?
A band near 1466 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 1466 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 | 17 | 15 | 1.0 |
| Methoxy (OCH3) | 4 | 4 | 1.0 |
| Methacrylate | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| Aromatic ring | 4 | 3 | 1.0 |
| C-O single bond | 3 | 3 | 1.0 |
| Amide | 3 | 3 | 1.0 |
| Carbonyl (C=O) | 3 | 2 | 1.0 |
| Alkene (C=C) | 2 | 2 | 1.0 |
| Ring structure | 2 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Nitrogen heterocycle | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonate | 1 | 0 | 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 |
|---|---|---|---|
| TiO2 | 1466, 1700, 1093 | Alkyl C-H, Methacrylate, Acetate | 1 |
| SiO2 | 1466, 1739, 699 | Alkyl C-H, Methoxy (OCH3) | 1 |
| graphene | 1466, 1720, 2097 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| CS | 1466, 1645, 1720 | Methacrylate, Acetate, Alkyl C-H | 1 |
| CA | 1466, 1045, 1650 | Acetate, Methacrylate, Methoxy (OCH3) | 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 1466 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
-
Acetate confidence 1.0
“C=O stretching vibration O-H 1466 1467 O-H bending vibration C-O”
Ganie 等 - 2020 - Synthesis and Characterization of a New Surface-Mo DOI: 10.1155/2020/8814260 -
Alkyl C-H confidence 1.0
“There are a two cm-1 peaks at 2865.67 and 2918.4 corresponding to stretching vibration of C H bonds in the high frequency area together cm-1 with a sharp peak at 1465.95 corresponding to the bending vibration of C H groups of water molecule”
Production of graphene powder by electrochemical exfoliation of graphite electrodes immersed in aqueous solution DOI: 10.1016/j.ijleo.2016.04.101 -
Nitrogen heterocycle confidence 1.0
“20.16 (cid:4) (cid:4) (cid:4) 21, 22, and The peaks at 900, 1068, plane modes, Electrochemical polymerization and reduction were percm-1 1091, and 1121 can be assigned to pyrrole in-plane 0.05M 0.1M formed in acetonitrile containing thiophe”
Kato 等 - 2007 - X-ray photoemission spectroscopy and Fourier trans DOI: 10.1116/1.2731347 -
Alkyl C-H confidence 1.0
“Email: wanglei90@zstu.edu.cn cm-1 C-H stretching vibration as well as 1466 assigned to the - Xiang Mi Fujian Key Laboratory of Novel Functional Textile”
Wang 等 - 2023 - Surface-Modified TiO2@SiO2 Nanocomposites for Enha DOI: 10.1021/acsomega.3c02679 -
Alkyl C-H confidence 1.0
“The peaks of the wavenumber at 1466 and 1544 cm-1 corresponding to the CH2 scissoring modes and amide II shifted towards lower wavenumbers at 4 and 9 cm-1, respectively, for both the hyperplasia and carcinoma patients.”
Simultaneous FTIR and Raman Spectroscopy in Endometrial Atypical Hyperplasia and Cancer DOI: 10.3390/ijms21144828 -
Acetate confidence 1.0
“Moreover, the vibration peak of the C-O bond in the carbonyl group is at 1466 cm-1.”
Inhibition of Poly(ethylenediaminetetraacetic acid-diethanolamine) on Deposition of Calcium Sulfate Crystal in Simulated Industrial Water DOI: 10.3390/cryst10060544 -
Alkyl C-H confidence 1.0
“10 of 18 The FTIR spectrum of PEO exhibited characteristic peaks at 2882 and 1466 cm-1 as- -CH2group and -CH2scissorsigned to the C-H asymmetric stretching vibration of the ing, respectively.”
Cojocaru 等 - 2022 - Electrospun Nanofibrous Membranes Based on Citric DOI: 10.3390/polym14020294 -
Alkyl C-H confidence 1.0
“1747 1743 stretching 1466 1464 C-H out of plane bending (wagging) from CH3 groups 1466 1464 C-H out of plane bending (wagging) from CH groups”
Spectroscopic Characterization of Emulsions Generated with a New Laser-Assisted Device DOI: 10.3390/molecules25071729
Have a spectrum with this band?
Upload your FTIR spectrum and get a full interpretation report — peak assignments with literature citations, library matches, and a literature-backed analysis — in seconds.