What absorbs at 482 cm⁻¹ in an FTIR spectrum?
A band near 482 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 482 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 |
|---|---|---|---|
| Siloxane (Si-O-Si) | 5 | 5 | 1.0 |
| Metal oxygen | 4 | 3 | 1.0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Silicon carbon | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Amine primary | 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 |
|---|---|---|---|
| TiO2 | 482, 1700, 1093 | Metal oxygen | 2 |
| PDMS | 482, 873, 1080 | Silicon-oxygen (Si-O), Silicon (Si), Siloxane (Si-O-Si) | 1 |
| ZnO | 482, 1400, 3430 | Metal oxygen | 1 |
| SiC | 482, 791, 805 | Silicon-oxygen (Si-O), Silicon (Si), Siloxane (Si-O-Si) | 1 |
| TiO2 nanoparticles | 482, 1700, 455 | Metal oxygen | 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 482 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
-
Alkyl C-H confidence 1.0
“cm-1 and 1635 due to stretching vibrations of O-H group, the bands assigned at 3275 cmcm-1, - 1 the band at 2922 due to vibrations of C H stretching thee band at 1213 1062cm-1,482cm-1,576cm-1,1535cm-1arethefollowingvibrationsC-Ostretching,N”
Bio-engineered TiO2 nanoparticles using Ledebouria revoluta extract: Larvicidal, histopathological, antibacterial and anticancer activity DOI: 10.1080/03067319.2020.1718668 -
Metal oxygen confidence 1.0
“LLM confirmed rule peak-group candidate”
Komaraiah 等 - 2019 - Structural, optical and photoluminescence studies DOI: 10.1016/j.ceramint.2019.03.170 -
Alkyl C-H confidence 1.0
“The absorption peak at 2,860, 2,928 gives about the alkanes/aliphatic 482 C-H stretching bonds.”
Singh 等 - 2017 - Comprehensive characterization of lignocellulosic DOI: 10.1016/j.renene.2016.11.039 -
Silicon (Si) confidence 1.0
“The absorption peak at 482 tioninacomposite.Itisobservedthattheintensitiesoftypical can be attributed to bending vibrations of Si-O-Si bonds.”
Lakhane 等 - 2016 - Metal oxide blended ZSM-5 nanocomposites as ethano DOI: 10.1007/s12034-016-1286-8 -
Ring structure confidence 1.0
“A third degradation step has a maximum weight loss of 2.69% in the range of 173-700 °C, assigned to the decomposition of the cyclic carbonates and is associated with endothermic peaks at 482.15 and 521.20 Polymers2019,11,1596 8of20”
Noriega 等 - 2019 - Production and Characterization of Non-Isocyanate DOI: 10.3390/polym11101596 -
Silicon (Si) confidence 1.0
“ 1010 cm-1, 482 cm-1 from vibrations of PDMS's backbone, Si-O-Si, as well as of cm-1, cm-1 • 1010 482 from vibrations of PDMS's backbone, Si-O-Si, as well as of Si-O-Zr.”
Electron Beam Irradiation on the Production of a Si- and Zr-Based Hybrid Material: A Study by FTIR and WDXRF DOI: 10.3390/ma16020489 -
Silicon-oxygen (Si-O) confidence 1.0
“styreneSi-O-Si), Si-CH However, the analysis suggests that the material could be 3), 1101 (asymmetric stretching of 1068 (asymmetric Si-O-Si), Si-O-Si), stretching of 806 (symmetric stretching of 678 butadienerubber(SBR)becausesignalsofsuch”
Non-invasive identification of plastic materials in museum collections with portable FTIR reflectance spectroscopy: Reference database and practical applications DOI: 10.1016/j.microc.2015.07.016 -
Siloxane (Si-O-Si) confidence 0.9
“Explicitly assigned to Si-O-Si bond.”
Fuad 等 - 2018 - Nanostructural Characters of beta-SiC Nanoparticle DOI: 10.1088/1742-6596/1011/1/012066
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