What absorbs at 852 cm⁻¹ in an FTIR spectrum?
A band near 852 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 7 cited sources
Quick answer
A band near 852 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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Nitro (NO2) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 0,9 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Possible materials
| Materiale | Understøttende toppe | Overlapping groups | Citerede kilder |
|---|---|---|---|
| chitosan | 852, 1650, 1655 | Methacrylate, Methoxy (OCH3) | 1 |
| chitin | 852, 1650, 1655 | 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 852 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 bag disse tildelinger
-
Carbonate tillid 1,0
“Patients crystal, is calculated from the ratio of the integrated area of were identified utilizing prospectively collected data for 60 890cm1) the n2 carbonate peak (852 to and that of the patients who underwent instrumented posterior lumba”
Okano 等 - 2020 - Correlation between Urine N-Terminal Telopeptide a DOI: 10.1155/2020/5725086 -
Acetate tillid 1,0
“The FTIR spectrum of PPP/PEG-NH/Hys/MAB (Figure 3a) exhibited the typical absorption peaks at 2926 and 2869 cm-1 (-CH2-, asymmetric and symmetric stretching vibrations), 1713 cm-1 (C=O, stretching vibration), 1600 and 1524 cm-1 (aromatic C-”
Design and Synthesis of Amphiphilic Graft Polyphosphazene Micelles for Docetaxel Delivery DOI: 10.3390/pharmaceutics15051564 -
Nitro (NO2) tillid 1,0
“as(C-N) s(C-N) (ν ν for the corresponding azanion at 1487 and at 1321 The C-N stretching cm-1), cm-1 B vibration of (852 characteristic for the nitro group, was shifted about 4 to a lower B-azanion.”
Tisovsky 等 - 2017 - Effect of Structure on Charge Distribution in the DOI: 10.3390/molecules22111961 -
tillid 0,9
“Explicit assignment: 'peaks at 852 and 912 the bands of O2'”
Subbotina 和 Barsukov - 2020 - Direct evidence of the key role of UV-formed perox DOI: 10.1039/C9CP04728J. -
tillid 0,9
“Text: '852 typical of ... C-H equatorial vibrations'.”
Tiburu 等 - 2017 - Formation of Chitosan Nanoparticles Using Deacetyl DOI: 10.4028/www.scientific.net/JNanoR.48.156 -
Oxygen heterocycle tillid 0,9
“Text: '852와' in context of epoxide group.”
Park 等 - 2013 - Curing Behaviors of Transparent Aliphatic Epoxy Ac DOI: 10.7317/pk.2013.37.3.302 -
tillid 0,7
“Text: 'at 852 revealed the presence of absorption oscillations of bond.'”
Chemical characterization and antioxidant properties of exopolysaccharides from mangrove filamentous fungi Fusarium equiseti ANP2 DOI: 10.1016/j.btre.2018.e00277
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