What absorbs at 476 cm⁻¹ in an FTIR spectrum?
A band near 476 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 6 cited sources
Quick answer
A band near 476 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 |
|---|---|---|---|
| C-O single bond | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 0.95 |
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 |
|---|---|---|---|
| Cellulose | 476, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 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 476 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
-
confidence 1.0
“identifiable associated with ferrocene groups are clearly in cm-1 Figure 1 (red curve, in the middle): the band at 476 As XPS gives the relative chemical composition of surfaces at a corresponds to Fe-C stretching modes, while the ones 1-10”
Al Dine 等 - 2019 - Self-Limited Grafting of Sub-Monolayers via Diels- DOI: 10.1021/acsomega.9b02391 -
Acetate confidence 1.0
“In addition, the peak at 475.65cm-1 fulfils the requirement of manufacturer for application in indicates the presence of C-O-C bending in both construction and automotive industries.”
Sahari 和 Maleque - 2016 - Mechanical Properties of Oil Palm Shell Composites DOI: 10.1155/2016/7457506 -
Metal oxygen confidence 0.95
“Explicit assignment in text: 'peaks of 476 and 547 indicating the presence of MgO and MnO2'”
Othman 等 - 2017 - Physicochemical properties and methane adsorption DOI: 10.5714/CL.2017.24.082 -
confidence 0.9
“Explicit assignment: 'sharp band at 476 cm-1 ascribed to Se bonding'”
Vidhya 等 - 2020 - Energy storage performance of CoNiSe2 nanostructur DOI: 10.1016/j.matlet.2020.128485 -
C-O single bond confidence 0.9
“explicit assignment”
Barzic 等 - 2022 - Cellulose derivativebarium titanate composites wi DOI: 10.21203/rs.3.rs-467926/v1 -
confidence 0.8
“Assigned as internal mode in text.”
Nabiyev 等 - 2018 - Structural Studies of dielectric HDPE+ZrO2 polymer DOI: 10.1088/1742-6596/994/1/012011
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