What absorbs at 537 cm⁻¹ in an FTIR spectrum?
A band near 537 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 537 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.
Possíveis atribuições de grupos funcionais
| Grupo funcional | Fatos de suporte | Fontes citadas | Maior confiança |
|---|---|---|---|
| Metal oxygen | 4 | 4 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
A classificação reflete a evidência acumulada da literatura, não uma única regra autoritária. Sempre confirme com o contexto da sua amostra.
Possible materials
| Material | Picos de suporte | Overlapping groups | Fontes citadas |
|---|---|---|---|
| PMMA | 537, 1722, 1383 | Alkyl C-H | 1 |
| pectin | 537, 1746, 1150 | Alkyl C-H | 1 |
| copper oxide | 537, 624, 1686 | Metal oxygen, Alkyl C-H | 1 |
| rGO | 537, 2358, 2930 | Alkyl C-H | 1 |
| lignin | 537, 1035, 1510 | Alkyl C-H | 1 |
| wood | 537, 1740, 1730 | Alkyl C-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 537 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.
Literatura por trás destas atribuições
-
Carbonyl (C=O) confiança 1,0
“In the O 1s scan of PAA the peak at 537 eV was attributed to the presence of carbonyl and hydroxyl groups of the carboxylic group as shown in Fig.”
Fareed 和 Stamboulis - 2014 - Nanoclays reinforced glass ionomer cements disper DOI: 10.1007/s10856-013-5058-3 -
confiança 1,0
“cm-1 peak at 537 develops due to the Cu-O stretching which corresponds to the B mode [35].”
Rapid analyses of stress of copper oxide nanoparticles on wheat plants at an early stage by laser induced fluorescence and attenuated total reflectance Fourier transform infrared spectroscopy DOI: 10.1016/j.vibspec.2017.06.004 -
confiança 1,0
“cm-1 at 422 and 410 The increase in the intensity of the absorption band at 537 could be attributed to an incorporation of zinc ions in the tetrahedral site depending on the preference of these ions for this site.”
Effects of Zinc Substitution on the Microstructural and Magnetic Characteristics of Cubic Symmetry Nickel Ferrite System DOI: 10.3390/sym15050975 -
confiança 1,0
“The peak at 910 corresponded to the bending vibrations of the cm-1 The peaks at 537 and 467 corresponded to the deformation vibrations of the Al-O-Si”
Enhancing the Thermal Stability of Ionogels: Synthesis and Properties of Triple Ionic Liquid/Halloysite/MCC Ionogels DOI: 10.3390/molecules26206198 -
Sulfonate confiança 1,0
“The peaks for SO3 bending and rocking were obtained at 537 cm-1 and 413 cm-1, 3 cm-1, 413 respectively [16].”
Anis 等 - 2023 - Studies on Polybenzimidazole and Methanesulfonate DOI: 10.3390/polym15132821 -
confiança 1,0
“- the appearance of new bands from 1115 (of high intensity) and 537 cm-1 were assigned to silica and other oxides from FA, as seen in Figure 3.”
The Influence of Fly Ash on the Mechanical Properties of Water Immersed All Waste Composites DOI: 10.3390/polym14101957 -
Amide confiança 1,0
“cm(cid:5)1 cm(cid:5)1 and 607.7 stretching, and absorption bands between 1479.1 TheFTIRspectrumwasusedtoidentifythefunctionalgroupofactive cm(cid:5)1 are characteristic of the amide II region and bands from 536.9 to componentsbasedonthepeak”
Phytochemical screening, polyphenols, flavonoids and tannin content, antioxidant activities and FTIR characterization of Marrubium vulgare L. from 2 different localities of Northeast of Morocco DOI: 10.1016/j.heliyon.2020.e05609 -
confiança 1,0
“The rGO (rGO) impregnated with magnetic Fe 3O showed an 4 cm-1", additional peak at "537 which gives a clear identification of the Fe-O-Fe bond [37].”
Fabrication of MNPs/rGO/PMMA Composite for the Removal of Hazardous Cr(VI) from Tannery Wastewater through Batch and Continuous Mode Adsorption DOI: 10.3390/ma14226923
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