What absorbs at 1119 cm⁻¹ in an FTIR spectrum?
A band near 1119 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 1119 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.
可能性のある官能基アサイン
| 官能基 | 裏付け事実 | 引用元 | 最高信頼度 |
|---|---|---|---|
| Methacrylate | 4 | 4 | 1.0 |
| C-O single bond | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| Methoxy (OCH3) | 3 | 3 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Carbonate | 1 | 0 | 0.5 |
ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。
Possible materials
| 素材 | 補助ピーク | Overlapping groups | 引用元 |
|---|---|---|---|
| polypyrrole | 1119, 1700, 400 | Alkyl C-H, Methacrylate, Acetate | 1 |
| silver nanoparticles | 1119, 1636, 1631 | Alkyl C-H, Methacrylate, Acetate | 1 |
| cotton | 1119, 1030, 1638 | Alkyl C-H, Methacrylate, Acetate | 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 1119 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.
これらのアサインの根拠となる文献
-
C-O single bond 信頼度 1.0
“5, the TSX spectra showed a C-O-C band at 1156 and a cm-1 small broad peak at 1119 assigned to the C-OH as previously described [35].”
Sangfai 等 - 2015 - Preparation and characterization of kappa-carragee DOI: 10.1007/s00289-015-1360-1 -
Acetate 信頼度 1.0
“The band at 1119 M cm-1 is due to the C=O stretching modes arising from the absorption of atmospheric CO on the surface of the nanocrystals.”
Photovoltaic and Antimicrobial Potentials of Electrodeposited Copper Nanoparticle DOI: 10.1016/j.bej.2018.10.009 -
Phosphate (PO4) 信頼度 1.0
“AC 720cm-1 748cm-1are to associated with the stretching vibration of bridging oxygen cm-1 [17,21].The bands at around 790-815 are due to symmetric stretching vibrations of Pcm-1 1012cm-1 O-P rings [22] .The bands lie around at 1000 to are a”
Yaacob 等 - 2018 - Comprehensive study on compositional modification DOI: 10.1016/j.solidstatesciences.2018.05.006 -
Acetate 信頼度 1.0
“cm-1 cm-1 characteristics for two adjacent bands of 1119 and 1096 attributed to C-O stretching (ester cm-1 cm-1, group) among these oils.”
Han 等 - 2020 - Rapid Classification and Quantification of Camelli DOI: 10.3390/molecules25092036 -
Acetate 信頼度 1.0
“1020cm-1 corresponded to the functional The band at Similarly, functional groups such as -C-O-O-, -C-O-, 1119cm-1 corregroup C-O;”
Lakshmi 等 - 2015 - Reduction of Silver Ions by Cell Free Extracts of DOI: 10.1155/2015/539494 -
Alkyl C-H 信頼度 1.0
“The peak assignedto the C-H stretchingvibration in C-O-CH cm-1canbeassignedtotheC-Ostretching vibrationin at1119 Tablet preparation and characterization cm-1”
Formulation and evaluation of primaquine phosphate taste?masked rapidly disintegrating tablet DOI: 10.1211/jpp/60.10.0003 -
Alkyl C-H 信頼度 1.0
“The band at 1119 is due cm-1 to in-plane C-H bending modes.”
PANI/TiO<sub>2</sub> nanocomposite‐based chemiresistive gas sensor for the detection of <i>E. Coli</i> bacteria DOI: 10.1049/iet-nbt.2020.0046 -
Alkyl C-H 信頼度 1.0
“deformation vibration is shown by peaks at 1047 The cm(cid:3)1 C-H peak at 1119 is attributed to in and out of plane N-C ]C-H deformations.”
A novel flexible sensor for respiratory monitoring based on in situ polymerization of polypyrrole and polyurethane coating DOI: 10.1039/c7ra08331a
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