What absorbs at 1076 cm⁻¹ in an FTIR spectrum?
A band near 1076 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 1076 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 | 14 | 14 | 1.0 |
| Methoxy (OCH3) | 12 | 12 | 1.0 |
| Methacrylate | 12 | 12 | 1.0 |
| Acetate | 12 | 12 | 1.0 |
| Hydroxyl (O-H) | 7 | 7 | 1.0 |
| Carbohydrate | 5 | 5 | 1.0 |
| Silicon-oxygen (Si-O) | 5 | 5 | 1.0 |
| Silicon (Si) | 3 | 3 | 1.0 |
| Siloxane (Si-O-Si) | 3 | 3 | 1.0 |
| Amide | 3 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Nucleic acid | 2 | 2 | 1.0 |
| Protein | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| Phosphorus | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Sulfate (SO4) | 1 | 1 | 0.9 |
| Metal oxygen | 1 | 1 | 0.9 |
| Perchlorate | 1 | 1 | 0.8 |
| Silanol (Si-OH) | 1 | 0 | 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 |
|---|---|---|---|
| nanotube | 1076, 1540, 1080 | Methacrylate, Acetate, 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 1076 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
“The peak at 1076 can cm-1 be clearly observed because of the asymmetrical Si-O-Si stretch and peak at 798 indicating the cm-1 presence of asymmetric vibrations from Si-O-Si.”
Arizka 等 - 2019 - Synthesis and Physical Properties Characterization DOI: 10.1088/1757-899X/546/4/042004 -
Aromatic ring confidence 1.0
“C�C aromatic stretching frequencies were associated with troscopy was also used to assess the chemistry of 1076cm-1.”
Hajizadeh 等 - 2022 - Green Synthesize and Characterization of Copper Na DOI: 10.1155/2022/8100440 -
C-O single bond confidence 1.0
“LLM confirmed rule peak-group candidate”
Changes in hydrogen bonding in protein plasticized with triethylene glycol DOI: 10.1002/app.42166 -
Carbonyl (C=O) confidence 1.0
“stretching peak was observed at 1076 In addition, there was also a strong intensity cm-1 peak for the C=O bond at 1662 (Figure S1, Supplementary File).”
Synthesis, Characterization, Theoretical and Experimental Anticancer Evaluation of Novel Cocrystals of 5-Fluorouracil and Schiff Bases against SW480 Colorectal Carcinoma DOI: 10.3390/pharmaceutics15071929 -
Hydroxyl (O-H) confidence 1.0
“The peak of 1076cm(cid:1)1 2PO(cid:1) at is due to symmetry stretching for P(cid:1)OH of H in University 4 dilute H 3PO [5].”
Majid 和 Arof - 2008 - FTIR studies of chitosan-orthophosphoric acid-ammo DOI: 10.1080/15421400801904286 -
confidence 1.0
“The five vibrational features occur at 1030 cm1 (Si-F in gas phase SiF4), 1076 cm1 (Si-O in SiO2 film), 1728 cm1 (H2O scissors mode of adsorbed water), 3482 cm1 (O-H stretch of adsorbed H2O), and 3642 (SiO-H in surface silanol groups or H-X”
Montano-Miranda 和 Muscat - 2003 - Gas-phase HFvapor etching of thermal silicon diox DOI: 10.4028/www.scientific.net/SSP.92.207 -
Silicon (Si) confidence 1.0
“Unlike the peak at 1076 due to ThemorphologyofDAGwasanalyzedthroughaLeitzStereo Si-OandAl-Oasymmetricstretchingvibrations foundinDA,a microscope (USA).”
Heavy metal removal from water by adsorption using a low-cost geopolymer DOI: 10.1007/s11356-020-08482-0 -
Acetate confidence 1.0
“A broad peak at 1076 was assigned to the C-O or C-OH mode [33], and was observed in samples in the sol state but not in the gel state.”
Sangfai 等 - 2015 - Preparation and characterization of kappa-carragee DOI: 10.1007/s00289-015-1360-1
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