What absorbs at 1471 cm⁻¹ in an FTIR spectrum?
A band near 1471 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 1471 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 | 7 | 5 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Aromatic ring | 2 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Silicon hydride | 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 |
|---|---|---|---|
| SiO2 | 1471, 1739, 699 | Alkyl C-H, Methoxy (OCH3) | 1 |
| PE | 1471, 1414, 1700 | Alkyl C-H, 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 1471 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
“In addition, significant increases in the 1471 and 1265 peaks in the PCMW samples indicate asymmetric deformation vibration of the paraffin methyl group (CH 3-) and C-O stretch in lignin ring of guaiacyl units, respectively.”
n-Heptadecane-Impregnated Wood as a Potential Material for Energy-Saving Buildings DOI: 10.3390/f13122137 -
Alkyl C-H confidence 1.0
“In addicm(cid:2)1 tion, the peaks at 1471, 1430 and at 1391 can be (d(CH attributed to the scissoring vibration 2)) of methylene, the CH symmetric deformation bending modes 3 cm(cid:2)1 (d s(CH 3)), respectively.”
Topacli 等 - 2006 - Infrared studies of pyroelectric Langmuir-Blodgett DOI: 10.1016/j.molstruc.2006.03.083 -
Ring structure confidence 1.0
“NF-NDs/ phene ring vibration was detected at 1471 and a C-N cm-1.”
Ashraf 等 - 2014 - Preparation and properties of multilayered polymer DOI: 10.1515/polyeng-2013-0297 -
Alkyl C-H confidence 1.0
“LLM confirmed rule peak-group candidate”
Molecular separation of ions from aqueous solutions using modified nanocomposites DOI: 10.1038/s41598-021-89371-5 -
Aromatic ring confidence 1.0
“Strong bands at 1471 and 1467 are due to the stretching vibration of the aromatic cm-1 ring, C=C and bands at around 1200 are due to C-O-C antisymmetric and symmetric stretching.”
Herbicide-Intercalated Zinc Layered Hydroxide Nanohybrid for a Dual-Guest Controlled Release Formulation DOI: 10.3390/ijms13067328 -
Alkyl C-H confidence 1.0
“The peaks at 1471 and 714 are assigned symmetric CH2 stretching vibrations, respectively.”
Adhesive Hybrid SiO2.01C0.23Hx Nanoparticulate Coating on Polyethylene (PE) Separator by Roll-to-Roll Atmospheric Pressure Plasma DOI: 10.3390/coatings9030190 -
Alkyl C-H confidence 1.0
“The first peak at 719.4, C-H rocking deformation vibration, the second peak is for C-H bending deformation at 1461.6 and 1471.4cm-1 doublet peak occurred due to the presents of some impurities on the sample.”
Nabiyev 等 - 2018 - Structural Studies of dielectric HDPE+ZrO2 polymer DOI: 10.1088/1742-6596/994/1/012011 -
N h confidence 1.0
“3(cid:2) NH vibration of (1471 HCO absorbance was 2 ing of 1.00 mol CO 2/mol amine.”
An ATRFTIR Study on the Effect of Molecular Structural Variations on the CO2 Absorption Characteristics of Heterocyclic Amines, Part II DOI: 10.1002/cphc.201200066
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