What absorbs at 1086 cm⁻¹ in an FTIR spectrum?
A band near 1086 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 1086 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 | 11 | 1.0 |
| Methoxy (OCH3) | 14 | 10 | 1.0 |
| Methacrylate | 14 | 10 | 1.0 |
| Acetate | 14 | 10 | 1.0 |
| Silicon (Si) | 5 | 4 | 1.0 |
| Siloxane (Si-O-Si) | 4 | 4 | 1.0 |
| Amide | 4 | 4 | 1.0 |
| Carbonate | 4 | 4 | 1.0 |
| Hydroxyl (O-H) | 4 | 3 | 1.0 |
| Alkyl C-H | 4 | 3 | 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 |
| Carbohydrate | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| C c single bond | 2 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Fluorine (C-F) | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Phosphorus | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| S eq o | 1 | 1 | 1.0 |
| Boron nitrogen | 1 | 1 | 1.0 |
| Methyl | 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 |
|---|---|---|---|
| nanocomposites | 1086, 1717, 1630 | C-O single bond, 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 1086 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
-
Amide confidence 1.0
“cm-1 1086 C-N stretching in amines, 1530 C=C Authors' contributions cm-1 stretching, 1602 C=N stretching (in ring), MHhasdesignedandsupervisedheprojectedwhileMZhasdonethe”
Hanif 和 Zaman - 2017 - Thiolation of arabinoxylan and its application in DOI: 10.1186/s40199-017-0172-2 -
confidence 1.0
“For silica several 1060, 1072, Si-O-Si str bands 1086 For polysaccharides 1000-1260 C-O str”
Fast Fourier infrared spectroscopy to characterize the biochemical composition in diatoms DOI: 10.1007/s12038-018-9792-z -
Acetate confidence 1.0
“bond,[16,18] To calculate the water contents in the form of H 2O and/or 1893 can be attributed to symmetric C-O al.,[26] cm-1 et HO for all minerals, as defined in Brand the followand the peak at 1086 can be assigned to the asymused:[27] in”
Parali 等 - 2015 - Dielectric behaviors at microwave frequencies and DOI: 10.1088/1674-1056/24/5/059101 -
Boron nitrogen confidence 1.0
“pure c-BN coatings were easily done by reactive RF magnetron sputsample ES4 and ES6 thin have a strong Raman peak at approxi1086cm-1.”
Pat 等 - 2018 - Cubic BN thin film deposition by a RF magnetron sp DOI: 10.1016/j.vacuum.2018.08.027 -
Acetate confidence 1.0
“The 1086 band C-O corresponds to stretching vibration.”
Sehgal 和 Narula - 2015 - Structural, morphological, optical, and electrical DOI: 10.1007/s00396-015-3663-z -
confidence 1.0
“In addition, the observed cm-1 peak intensities at 1085.8 and 1015.2 are assigned to the corresponding S-O and S=O”
Alamier 等 - 2022 - Thermodynamic and Spectroscopic Studies of SDS in DOI: 10.3390/app122312020 -
Acetate confidence 1.0
“The highest peaks at 1086 and assigned to the C=O and C=C groups present in furanic compounds.”
Application of Functional Data Analysis and FTIR-ATR Spectroscopy to Discriminate Wine Spirits Ageing Technologies DOI: 10.3390/math8060896 -
Acetate confidence 1.0
“The band peak at 1086 cm-1 is assigned to both valent vibrations of C-O-C bond vibrations of particular bonds.”
Development of Polymer Blend Electrolyte Membranes Based on Chitosan: Dextran with High Ion Transport Properties for EDLC Application DOI: 10.3390/ijms20133369
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