What absorbs at 1192 cm⁻¹ in an FTIR spectrum?
A band near 1192 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 1192 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.
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Methacrylate | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Amide | 3 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 1 | 1.0 |
| Fluorine (C-F) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 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 |
| Borate | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Thiocarbonyl | 1 | 1 | 1.0 |
| Phosphorus | 1 | 0 | 1.0 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
Possible materials
| Material | Supporting peaks | Overlapping groups | Cited sources |
|---|---|---|---|
| graphene | 1192, 1720, 2097 | Methacrylate, Acetate, Amide | 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 1192 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.
Literature behind these assignments
-
C c single bond confidence 1.0
“In the difference spectrum between before and cm-1 in L stretching vibration of the chromophore at 1192 (350-500 after the illumination with blue light nm) (Figure has exactly the same intensity in both difference spectra C-C cm-1, a 2a), i”
Maeda 等 - 1999 - Chromophore-protein-water interactions in the L in DOI: 10.1021/bi9907072 -
confidence 1.0
“different peaks, as shown in Figure 3B that were not present in the Egyptian nanoclay cm-1 (as shown in Table 2), i.e., the peak at 2327.72 representing O=C=O carbon dioxcm-1 ide (carbonyl bond group) and the band at 1191.57 assigned to Al-”
Foliar Application of Nanoclay Promotes Potato (Solanum tuberosum L.) Growth and Induces Systemic Resistance against Potato Virus Y DOI: 10.3390/v14102151 -
Metal oxygen confidence 1.0
“The main spectral bands at 1000, 1152 and 1506 o m medium intensity bands observed at 1192, 1210, 1284 and 1445 /fe were related to the presence of carotenoid pigments.”
Cojoc 等 - 2019 - Carotenoids produced by halophilic bacterial strai DOI: 10.1093/femsle/fnz243 -
Thiocarbonyl confidence 1.0
“1131 1124 C-O stretch 1049 1048 1040, 1089 C=S stretch 1192, 1296 C=O amide I bond”
Kishore 等 - 2012 - Immobilization of beta-Galactosidase onto Function DOI: 10.1371/journal.pone.0040708 -
Alkyl C-H confidence 1.0
“O) and ν(C-C) regions, PLLA exhibits sharp absorption peaks at 1760, 1081, and 1192 cm-1 cm-1 ν(C-H) PPAd exhibits a peak at 3000-2900 corresponding to the vibration modes of the methylene respectively.”
Nanaki 等 - 2020 - New Biodegradable Poly(l-lactide)-Block-Poly(propy DOI: 10.3390/polym12040852 -
Borate confidence 1.0
“It is interesting to note that the peaks corresponding to the B-O band (1192 cm-1)18 and O-B-O bond (550 appear in BNNT treated at 500 °C.”
Oxidative Unzipping and Transformation of High Aspect Ratio Boron Nitride Nanotubes into “White Graphene Oxide” Platelets DOI: 10.1038/srep29498 -
Phosphate (PO4) confidence 1.0
“The infrared spectra of β-Ca3(PO4)2 for the P-O groups are ∼943 ∼430 prominent at and 973 cm-1 for symmetric P-O stretching (ν1), cm-1 for doubly ∼1192 Materials2022,15,2924”
Ponnusamy 等 - 2022 - Synthesis, Structural, and Mechanical Behavior of DOI: 10.3390/ma15082924 -
Acetate confidence 1.0
“The peak at 1735 was due to C=O stretching vibrations of galacturonic acid, The peak at 1735 cm-1 was due to C=O stretching vibrations of galacturonic acid, and a cm-1 and a peak around 1192 was associated with the 3,6-anhydro-galactose bri”
Designing Deferoxamine-Loaded Flaxseed Gum and Carrageenan-Based Controlled Release Biocomposite Hydrogel Films for Wound Healing DOI: 10.3390/gels8100652
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