What absorbs at 1294 cm⁻¹ in an FTIR spectrum?
A band near 1294 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 1294 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 | 7 | 5 | 1.0 |
| Acetate | 7 | 5 | 1.0 |
| Methoxy (OCH3) | 5 | 4 | 1.0 |
| C-O single bond | 5 | 4 | 1.0 |
| Amide | 3 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Ketone | 2 | 1 | 1.0 |
| Ester | 2 | 1 | 1.0 |
| Carbonyl (C=O) | 2 | 1 | 1.0 |
| Carboxyl (COOH) | 2 | 1 | 1.0 |
| Secondary amine | 2 | 1 | 1.0 |
| C n single bond | 2 | 1 | 1.0 |
| Aromatic ring | 2 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| S eq o | 1 | 1 | 1.0 |
| Sulfonyl | 1 | 1 | 0.9 |
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 |
|---|---|---|---|
| pMMA | 1294, 1722, 1383 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| TiO2 | 1294, 1700, 1093 | Methacrylate, Acetate, C-O single bond | 1 |
| PCL | 1294, 1751, 1724 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| cellulose | 1294, 1735, 1650 | Acetate, Methacrylate, 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 1294 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
-
Acetate 信頼度 1.0
“In this work, this band is related to a complex vibration, caused by overtones and combinations cm-1 of 1294 and 1400 bands due to the interacting C-O stretching and in-plane COH bending”
Kondratenko 等 - 2020 - Thioglycolic Acid FTIR Spectra on Ag2S Quantum Dot DOI: 10.3390/ma13040909 -
S eq o 信頼度 1.0
“The bands at 1146 and 1294 cm-1 were recognized to be the stretching vibrations of S=O symmetric and S=O asymmetric, respectively.”
Preparation and Characterization of Polymer Membranes Impregnated with Carbon Nanotubes for Olive Mill Wastewater DOI: 10.3390/polym14030457 -
Aromatic ring 信頼度 1.0
“stretching of benzene and thiophene ring (C-C-C) band at 1562 combination band cm-1 at 1294 that includes the asymmetrical stretching of benzene ring a(C-C-C), sym-”
Aguilar-Rodriguez 等 - 2023 - Microanalytical Characterization of an Innovative DOI: 10.3390/molecules28020564 -
Acetate 信頼度 1.0
“C-O (ν a stretching band C-O) from 1294 cellulosechainsbymeansoftheairplasmatreatments.”
Alonso-Montemayor 等 - 2020 - Effect of cold air plasma on the morphology and th DOI: 10.24275/rmiq/Mat1510 -
Acetate 信頼度 1.0
“The band at 1294 was associated with the stretching vibrations of C-O, and C-C bonds poly(ε-caprolactone).”
Hejna 等 - 2020 - Reclaimed RubberPoly(epsilon-caprolactone) Blends DOI: 10.3390/polym12051204 -
C-O single bond 信頼度 1.0
“[87,94] PCL C-O/C-C stretching 1294 asymmetric C-O-C stretching 1240 asymmetric CH stretching”
Kravanja 和 Finsgar - 2021 - Analytical Techniques for the Characterization of DOI: 10.3390/biomedicines9121936 -
Metal oxygen 信頼度 1.0
“surface.59 3(cid:2) to NO by the oxygen on Cr 2O Based on the 3 cm(cid:2)1) frequencies of the peaks (1294 and 1500 and previous surfaces,25,32,58-60,62,63 studies of nitrate ions on metal oxide (A S 0/S Changes in absorption spectra = log”
Nishino 和 Finlayson-Pitts - 2012 - Thermal and photochemical reactions of NO2 on chro DOI: 10.1039/c2cp42292a -
Amide 信頼度 1.0
“at 718 (C=O bending), 1714 (C=O symmetric stretching), 1608, 1514, 1464, 1393 (C-C stretching of aromatic ring), 1393 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 1.00 (C-N stretching), 1294, 1025 (Ph-O-CH2), and 912 (oxirane (keV) ring) gave mo”
Rane 等 - 2014 - Synthesis and Characterization of Imide Containing DOI: 10.1155/2014/941793
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