What absorbs at 1083 cm⁻¹ in an FTIR spectrum?
A band near 1083 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 1083 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 | 7 | 7 | 1.0 |
| Silicon-oxygen (Si-O) | 7 | 6 | 1.0 |
| Methoxy (OCH3) | 6 | 6 | 1.0 |
| Methacrylate | 6 | 6 | 1.0 |
| Acetate | 6 | 6 | 1.0 |
| Siloxane (Si-O-Si) | 5 | 5 | 1.0 |
| Phosphate (PO4) | 3 | 3 | 1.0 |
| N-O bond | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Phosphorus | 1 | 1 | 1.0 |
| Amine primary | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Fluorine (C-F) | 1 | 1 | 0.9 |
| Silicon nitrogen | 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 |
|---|---|---|---|
| PVA | 1083, 1660, 2930 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
| alumina | 1083, 460, 1000 | Silicon-oxygen (Si-O) | 1 |
| hydrogel | 1083, 1632, 1062 | Methacrylate | 1 |
| poly(vinyl alcohol) | 1083, 1700, 2993 | Methacrylate, C-O single bond, 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 1083 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
-
Metal oxygen confidence 1.0
“The FTIR results cm-1 confirmed the acetal linkages of cross-linking at 1083 and the presence of stretching and cm-1, bending peaks of Al-O bond at 598 and 444 respectively.”
Effect of alumina on the performance and characterization of cross-linked PVA / PEG 600 blended membranes for CO2/N2 separation DOI: 10.1016/j.seppur.2018.08.026 -
Acetate confidence 1.0
“Furthermore, the addition of POM cm-1 into PVA-GA induces a slight increase in peak intensity at 1083 corresponds to C-O-C stretching”
Hendrawanh 等 - 2019 - Poly (vinyl alcohol)glutaraldehydePremna oblongi DOI: 10.1088/1757-899X/509/1/012048 -
Lipid confidence 1.0
“In the current work, the shift in peak position to cm-1 and 1083 were primarily assigned to the asymmetric lower values indicates that the lipid disorder increases and Table 1 Tentative frequency assignment and their functional groups for t”
Spectral profile index changes as biomarker of toxicity in Catla catla (Hamilton, 1822) edible fish studied using FTIR and principle component analysis DOI: 10.1007/s42452-020-3001-z -
confidence 1.0
“(cm-1) Wavenumber Assignment of vibrational mode ∼450 Si-O-Si bending mode ∼510-580 symmetric stretching vibrational mode ZnO4 ∼690 Zn-O-Si symmetric stretching vibrational mode ∼900 SiO4 asymmetric stretching vibrational mode ∼1083 Si-O-Si”
Synthesis of cobalt oxide Co3O4 doped zinc silicate based glass-ceramic derived for LED applications DOI: 10.1016/j.ijleo.2018.11.025 -
confidence 1.0
“The load plot of PC2 has C I 827/I F I 763/I 613 1654 seven positive weighted peaks around 1083, 1137, 1147, 1186, 1369cm-1.”
Wu 等 - 2023 - Infrared and Terahertz Spectra of Pu'er White Tea DOI: 10.1155/2023/3290917 -
confidence 1.0
“band at 1083 This is indicative of silica polymerization and growth of CSH as a final cured by-product when the MTA-based sealer undergoes complete setting [22,26].”
Abu Zeid 和 Edrees - 2022 - Hydration Characterization of Two Generations of M DOI: 10.3390/app12073517 -
Phosphate (PO4) confidence 1.0
“response of DNA in the control cells is charac- (PO terized by the components at ~1236 cm-1 2antisymmetric stretching), 1170 cm-1 (sugarphosphate backbone vibration), 1083 cm-1 (PO symmetric stretching), and 966 cm-1with 2- (C-C stretching”
Ami 等 - 2014 - Role of water in chromosome spreading and swelling DOI: 10.4081/ejh.2014.2330 -
N-O bond confidence 1.0
“peak at 1039 and no peak at 1083 Use Hydrophilic nature of former mat can be explained of alkaline for arabinoxylan dissolution caused the cm-1.”
Butylina 等 - 2022 - Study on spinnability of arabinoxylan extracted fr DOI: 10.1007/s10570-022-04761-w
Have a spectrum with this band?
Upload your FTIR spectrum and get a full interpretation report — peak assignments with literature citations, library matches, and a literature-backed analysis — in seconds.