What absorbs at 516 cm⁻¹ in an FTIR spectrum?
A band near 516 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 516 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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Metal oxygen | 5 | 5 | 1,0 |
| Silicon-oxygen (Si-O) | 4 | 4 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 1,0 |
| Metal oxo | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Amide | 1 | 0 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Possible materials
| Materiale | Understøttende toppe | Overlapping groups | Citerede kilder |
|---|---|---|---|
| cellulose | 516, 1735, 1650 | Hydroxyl (O-H) | 1 |
| hemicellulose | 516, 1730, 897 | Hydroxyl (O-H) | 1 |
| iron oxide | 516, 1130, 891 | Metal oxygen, Hydroxyl (O-H) | 1 |
| GO | 516, 1720, 1182 | Hydroxyl (O-H) | 1 |
| rGO | 516, 2358, 2930 | Hydroxyl (O-H) | 1 |
| PCL | 516, 1751, 1724 | Hydroxyl (O-H) | 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 516 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.
Litteratur bag disse tildelinger
-
tillid 1,0
“stretching alkylhalide(halocompound) stretching 780.86 strong C-Cl alkylhalide(halocompound) stretching 516.39 strong C-I 2.4.”
Phytochemical Composition of Combretum molle (R. Br. ex G. Don.) Engl. & Diels Leaf and Stem Extracts DOI: 10.3390/plants12081702 -
Silicon (Si) tillid 1,0
“Bands at516 and assigned toAl-Oconcentration in the supernatant solution during the adsorption process Si and Si-O-Si bending vibrations, respectively (Chieng et al., 2010;”
Sodium montmorillonite/ureasil-poly(oxyethylene) nanocomposite as potential adsorbent of cationic dye DOI: 10.1016/j.clay.2017.11.009 -
Metal oxygen tillid 1,0
“Figure 1(a) showed the first weight loss up to 516cm-1 320∘ [11], and the V-O-V V symmetric stretch around C with a large endotherm, associated with the volatiliza756cm-1 asymmetric stretch at [12].”
Gokdemir 等 - 2014 - Structural Modification of Sol-Gel Synthesized V2O DOI: 10.1155/2014/795384 -
Silicon-oxygen (Si-O) tillid 1,0
“LLM confirmed rule peak-group candidate”
The physicochemical and biomechanical profile of forsterite and its osteogenic potential of mesenchymal stromal cells DOI: 10.1371/journal. -
tillid 1,0
“Notably, prominent vibrations at 516, 510, and 509 correspond to Fe-O-As ligand vibrations [43].”
Morales-Mendoza 等 - 2023 - Effect of Micro-Nanobubbles on Arsenic Removal by DOI: 10.3390/jof9080857 -
tillid 1,0
“The two peaks at 516 and 462 correspond to stretching vibration of the Al-O and”
Influence of montmorillonite/carbon nanotube hybrid nanofillers on the properties of poly(lactic acid) DOI: 10.1016/j.clay.2020.105925 -
tillid 1,0
“516cm-1 shows the presence of Al-OH bond.”
Tsekpo 等 - 2023 - Fabrication, Properties, and Performance of Polyme DOI: 10.1155/2023/5683415 -
Silicon (Si) tillid 1,0
“the peak at 516 cm-1 was caused by the Si-O-Fe stretching vibrations whilst the peaks at 638 cm-1 and at 838 cm-1 were due to Si-O stretching vibrations and Si-O-Al stretching vibrations, respectively.”
Investigation on the Painting Materials and Profile Structures Used in Ancient Chinese Folk Architectural Paintings by Multiple Analytical Methods DOI: 10.3390/coatings12030320
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