What absorbs at 867 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 867 cm⁻¹ puede apuntar a varios grupos funcionales. A continuación se muestran las asignaciones más probables, clasificadas por cuánta evidencia publicada respalda cada una — cada una trazable a literatura (DOI) y validada de forma cruzada con nuestros más de 130,000 espectros de referencia y grafo de conocimiento.
Backed by 8 cited sources
Quick answer
A band near 867 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.
Posibles asignaciones de grupos funcionales
| Grupo funcional | Hechos de respaldo | Fuentes citadas | Confianza máxima |
|---|---|---|---|
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 1 | 1,0 |
| Sulfate (SO4) | 1 | 1 | 1,0 |
| Sulfonate | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Imide | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Amide | 1 | 0 | 1,0 |
La clasificación refleja la evidencia acumulada de la literatura, no una única regla autorizada. Siempre confirme según el contexto de su muestra.
Possible materials
| Material | Supporting peaks | Overlapping groups | Fuentes citadas |
|---|---|---|---|
| nanotubes | 867, 1735, 1630 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| hydroxyapatite | 867, 1620, 1639 | Methacrylate, Acetate | 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 867 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 detrás de estas asignaciones
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Ring structure confianza 1,0
“cm-1 cm-1 R D-ribose increasing time of the accumulation, the values gradually ing, 1049 to C - O stretching, 913 to ct cm-1 D-ribose increase, which can be observed by increasing the diameter ring vibration, and 867 to C endo-sugar.”
Gallic acid-coated silver nanoparticles as perspective drug nanocarriers: bioanalytical study DOI: 10.1007/s00216-022-03955-2 -
Acetate confianza 1,0
“1126 1126 Stretching of C-O bond - - 867 867”
Tuning of ferrites (CoxFe3-xO4) nanoparticles by co-precipitation technique DOI: 10.1007/s42452-019-0244-7 -
Acetate confianza 1,0
“A cm-1 peak at 867 cm-1 was assigned to CH3 group vibration.”
Basheer 等 - 2020 - Synthesis, Characterization, and Analysis of Hybri DOI: 10.3390/polym12061305 -
confianza 1,0
“5c) shows two peaks at 867.3 eV and microscope and energy dispersive X-ray spectrometer (SEM850 eV corresponding to Ni 2p and Ni 2p respectively.”
Flower-like 3-dimensional hierarchical Co3O4/NiO microspheres for 4-nitrophenol reduction reaction DOI: 10.1039/c8na00029h -
Imide confianza 1,0
“Band of unsaturation of maleimide disappeared”
Eugenol-based thermally stable thermosets by Alder-ene reaction: From synthesis to thermal degradation DOI: 10.1002/app.39269. -
Metal oxygen confianza 1,0
“The spectrum of AM-6 shows a Raman band at 867 cm-1, V-O the basis of the above discussions, a possible model is proposed which is the characteristic for the stretching V-O-V wires.24,37”
Guo 等 - 2012 - Structure and Basicity of Microporous Titanosilica DOI: 10.1021/jp305543m -
Carbonate confianza 1,0
“LLM confirmed rule peak-group candidate”
Microstructure and Characteristics of Calcium Phosphate Layers on Bioactive Oxide Surfaces of Air-Sintered Titanium Foams after Immersion in Simulated Body Fluid DOI: 10.3390/ma9120956 -
C-S single bond confianza 1,0
“5) exhibits a very strong cm-1, thiourethane bonds and the second stage-the urethane double absorption band at 2,071 and 2,047 characbonds (weakly visible peak at 332-338 (cid:3)C or as shoulder at teristic of asymmetric and symmetric C=O s”
Rogulska 等 - 2013 - New thermoplastic poly(thiourethane-urethane) elas DOI: 10.1007/s10973-013-3007-5
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