What absorbs at 1116 cm⁻¹ in an FTIR spectrum?
A band near 1116 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 6 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| C-O single bond | 2 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 0.9 |
| Sulfate (SO4) | 1 | 1 | 0.8 |
| Methoxy (OCH3) | 1 | 0 | 1.0 |
| Methacrylate | 1 | 0 | 1.0 |
| Acetate | 1 | 0 | 1.0 |
| Phosphate (PO4) | 1 | 0 | 0.9 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Silicon-oxygen (Si-O) confidence 0.9
“Infrared absorption peak of Si(Al)-O at 1116 cm-1.”
Li 等 - 2020 - Experimental study on the influence of water immer DOI: 10.1007/s10973-019-09073-z -
confidence 0.9
“Explicit assignment in text.”
Bertuola 等 - 2020 - Detection of carvacrol in essential oils by electr DOI: 10.1016/j.heliyon.2020.e03714 -
confidence 0.9
“Explicit assignment in text: 'absorption signal at 1116 cm-1 was attributed to the asymmetric stretching'”
Zuo 等 - 2010 - Synthesis and Application in Polypropylene of a No DOI: 10.3390/molecules15117593 -
C-O single bond confidence 0.8
“C-O-C stretching at 1116 cm-1.”
Sharma 和 Singh - 2020 - Influence of high and low dielectric constant plas DOI: 10.1177/0954008319894043 -
Sulfate (SO4) confidence 0.8
“Same as above.”
Ion 等 - 2023 - Degradation Products Assessment of the Wooden Pain DOI: 10.3390/app13042124 -
confidence 0.7
“Belonged to absorption peaks of stretching vibration.”
Dong 等 - 2023 - Multi-Method Analysis of Painting Materials in Mur DOI: 10.3390/coatings13071298
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