What absorbs at 906 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 906 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 906 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 |
|---|---|---|---|
| Oxygen heterocycle | 5 | 4 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| Ring structure | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Silicon hydride | 2 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Phosphate (PO4) | 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 |
|---|---|---|---|
| silica | 906, 1100, 1080 | Alkyl C-H, Methacrylate | 1 |
| polystyrene | 906, 1020, 1600 | Alkyl C-H, Methacrylate, Methoxy (OCH3) | 1 |
| polymer | 906, 1718, 1722 | Alkyl C-H, Methacrylate, Methoxy (OCH3) | 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 906 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
-
Phosphate (PO4) confianza 1,0
“The bright section is a blank area which and by HPO bands at 906 and 852 resulted from the incision of the ultramicrotome.”
Li 等 - 2014 - Mineralogical characterization of calcification in DOI: 10.1180/minmag.2014.078.4.01 -
Alkyl C-H confianza 1,0
“In asym(C-H) sym(C-H) cm-1 are assigned to the and of (cid:228) (cid:228) C-N+ part a, the intensity of the stretching modes at 906 and 3-N+ moiety, respectively.”
Nikoobakht 和 El-Sayed - 2001 - Evidence for bilayer assembly of cationic surfacta DOI: 10.1021/la010530o -
Acetate confianza 1,0
“OH bending motion is demonstrated by the band at 1322 cm-1 cm-1 Furthermore, the band at 1014 was attributed to the C-O stretching, whereas the band at 906”
Structural and UV-blocking properties of carboxymethyl cellulose sodium/CuO nanocomposite films DOI: 10.1038/s41598-023-28032-1 -
Oxygen heterocycle confianza 1,0
“The other bands seen at 906 and 846 ambient temperature to give the initiator-immobilized NCG were due to asymmetric stretching of the epoxy groups.”
Surface-initiated atom transfer radical polymerization grafting from nanoporous cellulose gels to create hydrophobic nanocomposites DOI: 10.1039/c8ra04163f -
Silicon (Si) confianza 1,0
“56 cm-1 absorption band at 906 is observed which could be attributed to an increase of the 57 cm-1 number of Si-H groups.”
Effects of 400 keV electrons flux on two space grade silicone rubbers DOI: 10.1016/j.matchemphys.2013.05.002 -
Aromatic ring confianza 1,0
“The peak at 906 was attributed to the out-of-plane bending mode of the hydrogen atoms in the phenyl ring of polystyrene.”
Fabrication of Europium-Doped Barium Titanate/Polystyrene Polymer Nanocomposites Using Ultrasonication-Assisted Method: Structural and Optical Properties DOI: 10.3390/polym14214664 -
Oxygen heterocycle confianza 1,0
“The bands at 906 and 837 were attributed to β-CD the stretching vibration of the epoxide in the linker.”
Evaluation of Polyethylene Glycol Crosslinked -CD Polymers for the Removal of Methylene Blue DOI: 10.3390/app10134679 -
N h confianza 1,0
“The 1480 cm-1 3 (symmetric NH bend), the 906 cm-1 (NH 3+/CH rock) and the 3081 cm-1 (N-H stretch) 3+ 3”
Characterization of a New Low Temperature Encapsulation Method with Ethylene-Vinyl Acetate under UV Irradiation for Perovskite Solar Cells DOI: 10.3390/app12105228
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