What absorbs at 1114 cm⁻¹ in an FTIR spectrum?
A band near 1114 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 1114 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 | 16 | 14 | 1.0 |
| C-O single bond | 16 | 14 | 1.0 |
| Acetate | 16 | 14 | 1.0 |
| Methoxy (OCH3) | 15 | 13 | 1.0 |
| Alkyl C-H | 7 | 7 | 1.0 |
| Silicon-oxygen (Si-O) | 5 | 5 | 1.0 |
| Amide | 5 | 5 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Secondary amine | 3 | 3 | 1.0 |
| C n single bond | 3 | 3 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Nucleic acid | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| N h | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| C=n | 1 | 1 | 1.0 |
| Sulfonate | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Metal hydroxyl | 1 | 1 | 1.0 |
| Thiocarbonyl | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 0.9 |
| Lignin | 1 | 1 | 0.9 |
| Nitrogen heterocycle | 1 | 1 | 0.9 |
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 |
|---|---|---|---|
| Chitosan | 1114, 1650, 1655 | Acetate, Methacrylate, C-O single bond | 2 |
| zinc oxide | 1114, 1627, 1638 | Methacrylate, Acetate, C-O single bond | 1 |
| CdS | 1114, 1375, 1092 | Methoxy (OCH3), Methacrylate, C-O single bond | 1 |
| zinc oxide nanoparticles | 1114, 1744, 1627 | Acetate, Methacrylate, Methoxy (OCH3) | 1 |
| cotton | 1114, 1030, 1638 | Methacrylate, Acetate, C-O single bond | 1 |
| chitin | 1114, 1650, 1655 | Methacrylate, Acetate, C-O single bond | 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 1114 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
-
Acetate confidence 1.0
“The band present at 1114 is due to the (C-O) stretching vibrations which corresponds to cm-1 the secondary alcohol.”
Dhayalan 等 - 2021 - Eco friendly synthesis and characterization of zin DOI: 10.1515/nanofab-2020-0104 -
Ring structure confidence 1.0
“cm-1 cm-1 1256 (C-H bending and CH symmetrical deformation), 1069 (asymmetric 3 cm-1 in-phase ring-stretching mode), 1023 (C-O-C asymmetric in-phase ring-stretching), 1159cm-1 1114cm-1”
Antimicrobial Activity of Chemically and Biologically Treated Chitosan Prepared from Black Soldier Fly (Hermetia illucens) Pupal Shell Waste DOI: 10.3390/microorganisms9122417 -
confidence 1.0
“The powder X-ray diffraction Accepted 18 November 2008 Available online 24 November 2008 cm-1and cm-1region,besides 617 (FTIR) spectrum showscharacteristic bands duetothe sulfate ion in1114 bands due to the amine moiety.”
Nagaraju 等 - 2009 - A facile low temperature hydrothermal route to CdS DOI: 10.1016/j.matlet.2008.11.032 -
confidence 1.0
“The internal asymmetric stretching vibration and external symmetric Si-O-T stretching of linkage were evidenced from the cm(cid:1)1, absorption bands at around 1114 and 797 respeccm(cid:1)1 tively.15 The characteristic bands of 549 and 1226”
Synthesis of ZSM5 Zeolite Particles Using Triethanol Amine as StructureDirecting Agent DOI: 10.1111/j.1551-2916.2011.05006.x -
confidence 1.0
“N-H C-N (coupled mode of bending and stretching cm-1 of a negative band at 1114 to a lower frequency by 7 vibrations) of backbone amides (22).”
Noguchi 等 - 1999 - Structure of a histidine ligand in the photosynthe DOI: 10.1021/bi990631 -
Alkyl C-H confidence 1.0
“cm-1, At peak 1114 the major increase in the FTIR spectra of dried, dyed, and smoked specimens was attributed to the C-H functional group in guaiacyl and syringyl (lignin) [22].”
Investigating the Effect of Smoke Treatment on Hygroscopic Characteristics of Bamboo by FTIR and Raman Spectroscopy DOI: 10.3390/ma15041544 -
Acetate confidence 1.0
“The absorption bands at 1114 cm-1 (C-O stretching) and 1628 and 1457 (C=O of amide I and II) β-CD-CS.”
Singh 等 - 2017 - Sustainable fragrance cum antimicrobial finishing DOI: 10.1016/j.scp.2017.01.003 -
Amide confidence 1.0
“Spectra cm‾1 for FeS-isoprop-DTC shows a medium peak at 2926 that is related to the C-H stretch in cm‾1 addition to another medium peak at 1114 corresponding to C-N stretch.”
Siraj 等 - 2020 - Synthesis, characterization and electrochemical in DOI: 10.1016/j.mee.2020.111400
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