What absorbs at 1145 cm⁻¹ in an FTIR spectrum?
A band near 1145 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 1145 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 |
|---|---|---|---|
| C-O single bond | 18 | 18 | 1.0 |
| Methoxy (OCH3) | 17 | 17 | 1.0 |
| Methacrylate | 17 | 17 | 1.0 |
| Acetate | 17 | 17 | 1.0 |
| Amide | 4 | 4 | 1.0 |
| Secondary amine | 3 | 3 | 1.0 |
| C n single bond | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Alkene (C=C) | 2 | 2 | 1.0 |
| S eq o | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Lignin | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| C=n | 1 | 1 | 1.0 |
| Chitosan | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| C-S single bond | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Phospholipid | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Aromatic ring | 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 |
|---|---|---|---|
| PMMA | 1145, 1722, 1383 | Methacrylate, Acetate, Methoxy (OCH3) | 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 1145 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
“Zhou, Limin Wu, Polymer 122-129 4 C-O stretching vibrations 1145 (2011).”
Kumar 和 Sidhu - 2013 - Synthesis and Characterization of PMMA-ZrO2 Nanoco DOI: 10.1063/1.4810163 -
Amide 信頼度 1.0
“stretching (1534 and 1381 C-O and C-N stretching (1145 and 1013 The RA-CPTMS/TiO composite 2 materials showed both characteristic peaks of TiO and the red amaranth extract, indicating the successful 2”
Kurniawan 等 - 2019 - Selective Betalain Impregnation from Red Amaranth DOI: 10.1063/1.5134613 -
Aromatic ring 信頼度 1.0
“The 1145cm-1 1080cm-1 absorption peak at and corresponded to the benzene ring =C-H bending vibration 916cm-1 in the plane.”
Li 等 - 2011 - The detection of Cypermethrin on the surface of Ap DOI: 10.4028/www.scientific.net/AMR.287-290.2991 -
Acetate 信頼度 1.0
“In the glycerol cm(cid:1)1 spectra, the peak intensities at about 1145 and 962 are responsible for C-O stretching [27].”
Interactions between polyols and wheat biopolymers in a bread model system fortified with inulin: A Fourier transform infrared study DOI: 10.1016/j.heliyon.2018. -
Phosphate (PO4) 信頼度 1.0
“Peaks formed at 1145 cm-1 might also be due to the PO2 group vibration of the phospholipids present in the cold pressed walnut oil.”
Walnut Oil Oleogels as Milk Fat Replacing System for Commercially Available Chocolate Butter DOI: 10.3390/gels8100613 -
Acetate 信頼度 1.0
“Three -C-O-Cpeaks appear at 1145, 1116, and cm-1, ular segments.”
Yang 等 - 2015 - Effect of molecular weight on conformational chang DOI: 10.1007/s10853-014-8714-1 -
Water (H2O) 信頼度 1.0
“Therefore, the peak position at 1145 of between SO and water molecules are only slightly weaker 42V the band of SO may be related to MgSO gels present as than those between water molecules, the formation of SIPs (and”
Zhao 等 - 2006 - Magnesium sulfate aerosols studied by FTIR spectro DOI: 10.1021/jp055291i -
Amide 信頼度 1.0
“[46], the peak at 1145 the amide band that accounts for the peak at 1236 cm-1[45].”
Antibacterial Activity of the Green Synthesized Plasmonic Silver Nanoparticles with Crystalline Structure against Gram-Positive and Gram-Negative Bacteria DOI: 10.3390/nano13081327
このバンドを持つスペクトルがありますか？
FTIRスペクトルをアップロードすると、数秒で完全な解釈レポート（文献引用付きピークアサイン、ライブラリマッチ、信頼度評価付き証拠チェーン）を取得できます。