What absorbs at 906 cm⁻¹ in an FTIR spectrum?
A band near 906 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 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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| 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 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Possible materials
| Material | Stödjande toppar | Overlapping groups | Citerade källor |
|---|---|---|---|
| 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.
Litteratur bakom dessa identifieringar
-
Phosphate (PO4) förtroende 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 förtroende 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 förtroende 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 förtroende 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) förtroende 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 förtroende 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 förtroende 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 förtroende 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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