What absorbs at 862 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 862 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 862 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 |
|---|---|---|---|
| Methacrylate | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| Carbonate | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Borate | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 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 |
|---|---|---|---|
| starch | 862, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 1 |
| cotton fabric | 862, 900, 2000 | Methacrylate, Acetate, C-O single bond | 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 862 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
-
C-O single bond confianza 1,0
“LLM confirmed rule peak-group candidate”
Two potential uses for silver nanoparticles coated with Solanum nigrum unripe fruit extract: Biofilm inhibition and photodegradation of dye effluent DOI: 10.1016/j.micpath.2017.08.039 -
Metal oxygen confianza 1,0
“The absorption band at around 742 and strong cm-1 4]2band at 862 are attributed to the O-W-O stretches of the [WO tetrahedron, because the”
Abozaid 等 - 2018 - Characterization of Neodymium Doped Calcium Tungst DOI: 10.2298/SOS1804445A -
Acetate confianza 1,0
“at 862 and 879 Both bands could be assigned to C=O vibration in carbonate 879 cm-1.”
Impact of NaOH Concentration on Deweaving of Cotton Fabric in Aqueous Solutions DOI: 10.3390/su13042015 -
Acetate confianza 1,0
“cm-1 cm-1 stretching, 1485 to the CH bending of an alkyl group, 1150 to the C-O stretching 2 6 ACCEPTED MANUSCRIPT cm-1 C-N+ of an aliphatic ketone group, and 862 to a symmetric stretching.”
Delgado-Mellado 等 - 2018 - Thermal stability of choline chloride deep eutecti DOI: 10.1016/j.molliq.2018.03.076 -
Acetate confianza 1,0
“skeletal stretch glyceraldehyde, 860.83, 764.60, 930.25, 709.34 glucopyranoside OH, C=O stretch, OH bend, Citric acid L (-)-glyceraldehyde, Glycerol 3368.50, 2932.94, 2058.91, CH 2, OH bond scissoring, molecule substitution anhydrous phosph”
Influence of physical and chemical modifications on granule size frequency distribution, fourier transform infrared (FTIR) spectra and adsorption isotherms of starch from four yam (Dioscorea spp.) cultivars DOI: 10.1007/s13197-021-05200-7 -
Alkene (C=C) confianza 1,0
“The peaks at 862.12 cm-1 and 810.04 cm-1 correspond to =C-H during production and transportation.”
Evaluating the Effect of Hydrophobic Nanosilica on the Viscoelasticity Property of Asphalt and Asphalt Mixture DOI: 10.3390/ma11112328 -
confianza 1,0
“cm-1 strong yet narrow peak at 530.42 due to wellThe infrared spectrum of n-hexane fraction cm-1 defined absorption for the halogen-substituted of Inflorescence showed, 719.45 and 862.18 cm-1 cm-1 aromatic compound.”
Ishtiaq 等 - 2020 - Antioxidant potential and chemical characterizatio DOI: 10.1590/0001-3765202020190387 -
Borate confianza 1,0
“Therefore, the bands cm-1 appearing in the region 862-1155 were due to the vibrations of the B-O bond stretching of BO structural units, which were overlapped with phosphate bands [23].”
The Influence of CoO/P2O5 Substitutions on the Structural, Mechanical, and Radiation Shielding of Boro-Phosphate Glasses DOI: 10.3390/ma14216632
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