What absorbs at 1184 cm⁻¹ in an FTIR spectrum?
A band near 1184 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
クイックアンサー
A band near 1184 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 | 8 | 7 | 1.0 |
| Acetate | 8 | 7 | 1.0 |
| Methoxy (OCH3) | 7 | 6 | 1.0 |
| C-O single bond | 6 | 5 | 1.0 |
| Amide | 5 | 4 | 1.0 |
| Secondary amine | 4 | 3 | 1.0 |
| C n single bond | 4 | 3 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Phosphorus | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| C=n | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Sulfonyl | 1 | 1 | 0.9 |
| S eq o | 1 | 0 | 0.7 |
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。
可能性のある材料
| 素材 | 補助ピーク | 重複グループ | 引用元 |
|---|---|---|---|
| polyamide | 1184, 1663, 1541 | Methacrylate, Acetate | 1 |
| silver nanoparticles | 1184, 1636, 1631 | Methacrylate, Acetate, C-O single bond | 1 |
同じ文献プールがこのバンドと少なくとも1つの追加の特性ピークをサポートする場合にのみ、材料が表示されます。
スペクトルロジック
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 1184 cm⁻¹ is usually not enough for material identification by itself.
実使用例
この種のクエリは、ポリマー識別、未知のプラスチックスクリーニング、QCトラブルシューティング、リサイクル材料の検証、および文献に基づいたピーク帰属のレビューで一般的です。
よくある間違い
- 少なくとも1～2つの支持ピークを確認せずに、1つの孤立したバンドを材料の証拠として扱うこと。
- 重複を無視: 複数の官能基が同じ波数付近に寄与することがあります。
- 添加剤、ブレンド、酸化、または汚染がスペクトルを歪める可能性がある場合に検証を省略すること。
検証アドバイス
曖昧さが残る場合は、特にブレンド、劣化サンプル、充填ポリマーについて、DSC、GC-MS、またはTGAで仮説を検証してください。
これらのアサインの根拠となる文献
-
Alkyl C-H 信頼度 1.0
“- - - - - 1265 1267 1263 Amino acid, CH and CH2 vibrations 1184 1199 -”
Doerr 等 - 2008 - Far infrared spectroscopy on hemoproteins A model DOI: 10.1016/j.vibspec.2008.02.003 -
Aromatic ring 信頼度 1.0
“The main Raman lines observed in In order to show the vibrational properties of the composites resulting from the elecare attributed to the vibrational modes caused by the deformation of the benzene ring, Figure 5a-c have maxima at ~415-498”
The Photoluminescence and Vibrational Properties of Black Phosphorous Sheets Chemically/Electrochemically Functionalized in the Presence of Diphenylamine DOI: 10.3390/polym14214479 -
Acetate 信頼度 1.0
“Furthermore, the cm-1 cm-1 1184 and 1038 bands could be attributed to the C-O stretching vibrations of 1184 cm-1 and 1038 cm-1 bands could be attributed to the C-O stretching vibrations of alcohols, esters, ethers and carboxylic acids from”
Green Synthesis and Characterization of Silver Nanoparticles Using a Lythrum salicaria Extract and In Vitro Exploration of Their Biological Activities DOI: 10.3390/life12101643 -
Acetate 信頼度 1.0
“The thermal properties such as glass transition and are correpeaks at = temperature (T g), melting temperature (T m) and enthalpies O and -CH 2, the sponding to the characteristic peaks of C 1184∼1190cm-1 m) were measured using a Perkin-Elm”
Fang 等 - 2009 - Synthesis of Poly(L-lactide) via Solvothermal Meth DOI: 10.1155/2009/929732 -
Carbohydrate 信頼度 1.0
“weighted peak around 1270 is related to guaiacyl ringin in The positive weighted peaks around cm-1 cm-1 1108 and 1062 and the negative weighted peaks around 1184 are related to hemicellulose, while the cm-1 positive weighted peaks around 99”
Soil-applied selenite increases selenium and reduces cadmium in roots of Moringa oleifera DOI: 10.1038/s41598-020-77350-1 -
Aromatic ring 信頼度 1.0
“Bands corresponding to the surfactant SDBS are also present in the figure, such as the S=O bonding vibrations present at 1184 cm-1 and 1043 cm-1, the cm-1 cm-1, in the figure, such as the S=O bonding vibrations present at 1184 and 1043 arom”
Study of Melamine-Formaldehyde/Phase Change Material Microcapsules for the Preparation of Polymer Films by Extrusion DOI: 10.3390/membranes12030266 -
Amide 信頼度 1.0
“The peak at 177 cm-1 is with the highest intensity are 101, 177, 1144, 1456, and 2923 attributed to Zn-N bond vibrations, the peak at 682 cm-1 is attributed to imidazolate ring puckering vibrations, the peak at 1144 cm-1 is attributed to Zn”
Biocatalysts Synthesized with Lipase from Pseudomonas cepacia on Glycol-Modified ZIF-8: Characterization and Utilization in the Synthesis of Green Biodiesel DOI: 10.3390/molecules27175396 -
Acetate 信頼度 1.0
“1184cm-1 Δ𝐼 (a stretching vibration of the C-O group of lipid The linear increase in the value of the parameter in”
Oleszko 等 - 2015 - Application of FTIR-ATR Spectroscopy to Determine DOI: 10.1155/2015/245607
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