What absorbs at 515 cm⁻¹ in an FTIR spectrum?
A band near 515 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 515 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.
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Metal oxygen | 5 | 5 | 1,0 |
| S s | 2 | 2 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Carbon bromine | 1 | 1 | 0,9 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Possible materials
| Matériel | Pics de support | Overlapping groups | Sources citées |
|---|---|---|---|
| ZnO | 515, 1400, 3430 | Metal oxygen | 1 |
| CuO | 515, 453, 1000 | 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 515 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.
Bibliographie derrière ces attributions
-
Acetate confiance 1,0
“The additional peaks at 1,640 3), cm-1 cm-1(C═O cm-1 (-C-H-CH 2,850 2), 1,746 ester), and observed in spread samples, and at about 1,515 cm-1 (C-O-CH (C-H 1,160 2) and few bands related to observed in butter samples, were ignored as they we”
Contreras 等 - 2010 - Evaluation of Nano Zinc (ZnO) for Surface Enhancem DOI: 10.1007/s11947-009-0237-4 -
Metal oxygen confiance 1,0
“The oxygen func147cm-1 (Eg) due to symmetric stretching vibration mode and other tionality groups attached at the surface of graphitic sheets reduced by 399cm-1 515cm-1 637cm-1 weaker bands at (B1g), (A1g), (Eg) corhydrothermal synthesis of”
Effect of co-sensitization in solar exfoliated TiO2 functionalized rGO photoanode for dye-sensitized solar cell applications DOI: 10.1016/j.mssp.2019.02.027 -
Silicon (Si) confiance 1,0
“An increase of T from 400 °C to 800 °C is seen to lead to anatase phase in the Ti 0.5Si 0.5O films fired at 600 is f 2 Si-O-Si a significant increase of the peak to the detriment of confirmed by the appearance of the peaks at 144, 395, 515”
Sarkar 等 - 2007 - Dielectric properties of sol-gel derived high-k ti DOI: 10.1016/j.tsf.2006.11.155 -
S s confiance 1,0
“The intensity of the relative intensity of the band at 540 The redistribution of the relative intensities of spectral compocm-1 intheRamanspectrumoftheDTT-CTsample bandat515 cm-1 nentsinthefrequencyintervalof300to370 isobservedin increases”
Brandt 等 - 2015 - Effect of thermal denaturation, inhibition, and cl DOI: 10.1117/1.JBO.20.5.051015 -
S s confiance 1,0
“The band cm-1 at 515 arising from the S-S stretching vibrational mode of a disulfide bond lower its intensity.”
Antibody CD133 Biofunctionalization of Ammonium Acryloyldimethyltaurate and Vinylpyrrolidone Co-Polymer-Based Coating of the Vascular Implants DOI: 10.3390/ma13245634 -
confiance 1,0
“The absorption band maximum at 515 cm-1 most likely corresponds to the Ti-O-Ti bond [40,41].”
Synthesis and Investigation of Zeolite TiO2/Al-ZSM-12 Structure and Properties DOI: 10.3390/catal13020216 -
Phosphate (PO4) confiance 1,0
“11(b) shows that after SP treatment, the peaks located at 546, 529, and 515 cm-1 attributed to the asymmetric and symmetric stretching vibrations of P-O-C appeared.”
Zou 等 - 2022 - Dispersion of sodium phytate on muscovite and the DOI: 10.37190/ppmp/154951 -
Metal oxygen confiance 0,9
“Indication for CuO.”
Effect of CuO and Graphene on PTFE Microfibers: Experimental and Modeling Approaches DOI: 10.3390/polym14061069
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