What absorbs at 1793 cm⁻¹ in an FTIR spectrum?
A band near 1793 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
クイックアンサー
A band near 1793 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 | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Carbonate | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
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 |
|---|---|---|---|
| polyester | 1793, 1700, 1250 | Methacrylate, Acetate | 1 |
| iron oxide | 1793, 1130, 891 | Methacrylate, Acetate | 1 |
| montmorillonite | 1793, 1637, 523 | Methacrylate, Acetate, Carboxyl (COOH) | 1 |
| PLA | 1793, 1650, 1073 | Methacrylate, Acetate, Carboxyl (COOH) | 1 |
| calcite | 1793, 2850, 2864 | Carbonate, Methacrylate, Acetate | 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 1793 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
-
Acetate 信頼度 1.0
“Its peaks are diffraction intensity in the pattern of 3)vibrationsofC-Obondsincalcite[21,23,24,36].A positionedat2𝜃(Millerindices)=17.96∘ (001),28.64∘ 1793cm-1 (100), corresponded to C=O weak IR absorption band at”
Loy 等 - 2016 - Effects of Calcination on the Crystallography and DOI: 10.1155/2016/2914368 -
Carboxyl (COOH) 信頼度 1.0
“cm(cid:3)1).28,29 cm(cid:3)1 and 2107 The band at 1793 is typical of PLA/17AP(b) (a) ("Laccarbonyl-containing compounds such as lactic acid acid," 2018),30 tic an expected product from the hydrolycm(cid:3)1 1300-1000 PLA.31,32 Bands in the”
Martins 等 - 2022 - The influence of montmorillonite on the flame-reta DOI: 10.3390/POLYM12081701 -
信頼度 1.0
“All calcium carbonate samples showed peaks at ~1793, 1429, 1024, 876, and 712 cm-1, respectively, assigned to the asymmetric vibration of the carbon-oxygen bond, which are also in alignment with the previous reports [46,52].”
Prewetting Induced Hydrophilicity to Augment Photocatalytic Activity of Nanocalcite @ Polyester Fabric DOI: 10.3390/polym14020295 -
Acetate 信頼度 1.0
“the peak at 1793 was the result of C-O symmetric stretching vibration, cm-1 out-of-plane bending vibration;”
Investigation on the Painting Materials and Profile Structures Used in Ancient Chinese Folk Architectural Paintings by Multiple Analytical Methods DOI: 10.3390/coatings12030320 -
Carbonate 信頼度 0.9
“Carbonate band increase at 1793 cm-1.”
Synthesis of Novel Non-Isocyanate Polyurethane/Functionalized Boron Nitride Composites DOI: 10.3390/polym14193934 -
信頼度 0.8
“Attributed to specific vibration of thiophene.”
Surface Characterization of Modified Electrodes Based on 4-(Azulen-1-yl)-2,6-bis((E)-2-(thiophen-2-yl)vinyl)pyridine DOI: 10.3390/sym14122506
このバンドを持つスペクトルがありますか？
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