What absorbs at 1041 cm⁻¹ in an FTIR spectrum?
A band near 1041 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 1041 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 |
|---|---|---|---|
| Methacrylate | 11 | 11 | 1.0 |
| Acetate | 11 | 11 | 1.0 |
| C-O single bond | 10 | 10 | 1.0 |
| Methoxy (OCH3) | 9 | 9 | 1.0 |
| Amide | 5 | 5 | 1.0 |
| Hydroxyl (O-H) | 5 | 5 | 1.0 |
| Carbohydrate | 5 | 5 | 1.0 |
| Silicon-oxygen (Si-O) | 4 | 3 | 1.0 |
| Secondary amine | 3 | 3 | 1.0 |
| C n single bond | 3 | 3 | 1.0 |
| Phosphate (PO4) | 3 | 3 | 1.0 |
| Carboxyl (COOH) | 3 | 2 | 1.0 |
| Ketone | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 1 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 0.9 |
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 |
|---|---|---|---|
| silver nanoparticles | 1041, 1636, 1631 | Methacrylate, Acetate, C-O single bond | 1 |
| GO | 1041, 1720, 1182 | Methacrylate, Acetate, C-O single bond | 1 |
| gold nanoparticles | 1041, 1638, 3252 | 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 1041 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
-
Hydroxyl (O-H) confidence 1.0
“2, the main IR bands of the GO sheets are peaked at 1041, 1230, 1373, 1614, 1724 and cm-1, C=C, 3604 these being assigned to the following vibrational modes: OH groups from the GO sheet edges, stretching8.”
Baibarac 等 - 2019 - Adsorption of 1,4-phenylene diisothiocyanate onto DOI: 10.1038/s41598-019-48314-x -
Amide confidence 1.0
“The observed cm(cid:1)1 band at 1041 corresponds to the C-N stretching vibrations.”
Green synthesis and characterization of gold nanoparticles using endophytic fungi Fusarium solani and its in-vitro anticancer and biomedical applications DOI: 10.1016/j.sjbs.2019.12.026 -
Silicon (Si) confidence 1.0
“Results: The FTIR results showed a new peak at 1041 which increased in intensity with an increase in the nanoclay content and was related to the Si-O stretching mode in PGN nanoclay.”
Fareed 和 Stamboulis - 2014 - Nanoclay addition to a conventional glass ionomer DOI: 10.4103/1305-7456.143619 -
Hydroxyl (O-H) confidence 1.0
“cm-1, A relatively weak band at 1041 which is assigned to the plane deformational (bending) W-OH mode, was found.”
Martinez-Juarez 和 Diaz-Reyes - 2008 - A method for deposition of tungsten trioxide (WO3) DOI: 10.1117/12.815958 -
Acetate confidence 1.0
“The band around 1330 and 1041 cm-1 represent C O stretching.”
CMC stabilized nano silver synthesis, characterization and its antibacterial and synergistic effect with broad spectrum antibiotics DOI: 10.1016/j.carbpol.2016.11.083 -
C-O single bond confidence 1.0
“Absorption at 1041 C-OH shown that gelation could be enhanced by the addition of sugars and could be attributed to the stretching vibrations of side groups and”
Improvement of the textural characteristics of curdlan gel by the formation of hydrogen bonds with erythritol DOI: 10.1016/j.foodhyd.2021.106648 -
Acetate confidence 1.0
“The band at 1636 cm-1 characterizes the vibration stretching for C=O carbonyl group [58], 1519 cm-1, and 1041 cm-1.”
Ocimum basilicum-Mediated Synthesis of Silver Nanoparticles Induces Innate Immune Responses against Cucumber Mosaic Virus in Squash DOI: 10.3390/plants11202707 -
Acetate confidence 1.0
“The peak at 1041 corresponds to C-O stretching vibration of organic compounds, such as ethers, esters, and amides.”
Removal of Lead(II) from Synthetic Wastewater by Lavandula Pubescens Decne Biosorbent: Insight into Composition–Adsorption Relationship DOI: 10.3390/app10217450
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