What absorbs at 903 cm⁻¹ in an FTIR spectrum?
A band near 903 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 903 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 |
|---|---|---|---|
| Phosphorus | 2 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Oxygen heterocycle | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Nitrate | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 0 | 1.0 |
| Methyl | 1 | 0 | 1.0 |
| Methoxy (OCH3) | 1 | 0 | 1.0 |
| Methacrylate | 1 | 0 | 1.0 |
| Acetate | 1 | 0 | 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。
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 903 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
-
Ring structure 信頼度 1.0
“6 here) cm-1 In the literature, the 903 band is assigned to ring C-H wagging and C-C”
Investigation on the overlapping bands of sydiotactic polystyrene by using 2D-IR spectroscopy DOI: 10.1016/j.molstruc.2016.03.103 -
Nitrate 信頼度 1.0
“besides the main peaks at m/z = 422 and m/z = 842, AM1d quantum semiempirical method use the Schro¨dinger other peak clusters at m/z = 903 and m/z = 921 assigned Er]+ equation to determine geometry, bond strengths, atomic to the complexes [”
Przybylski 等 - 2008 - ESI MS, spectroscopic and semiempirical characteri DOI: 10.1016/j.molstruc.2007.07.039 -
Oxygen heterocycle 信頼度 1.0
“appear at 878.8 From the viewpoint of photochemistry, it is instructive to This mode (due to the deformation of the oxirane three-membered ring) was assigned to the expericompare DGAn with other cyclic molecules with several single cm-1 men”
Jarmelo 等 - 2008 - Matrix-Isolated Diglycolic Anhydride Vibrational DOI: 10.1021/jp805603b -
Phosphate (PO4) 信頼度 1.0
“distinct absorptions at 903, 988, 1032, and Spectral subtraction of these two spectra suggested that these phosphate absorptions were deeper in the bioreduced compared with the heated abiotic control spectrum.”
Kashyap 等 - 2023 - Spectral Detection of Nanophase Iron Minerals Prod DOI: 10.1089/ast.2022.0042 -
Amide 信頼度 1.0
“940 cm-1 and 1169 cm-1 are C-N stretching vibrations of imidazole groups and C=N stretchThe absorption peak at 903 cm-1 originated from the epoxy group of the polymer, which ing vibrations at 1570 cm-1 [22].”
Design and Preparation of Imidazole Ionic Liquid-Based Magnetic Polymers and Its Adsorption on Sunset Yellow Dye DOI: 10.3390/ma15072628 -
Phosphate (PO4) 信頼度 1.0
“results in the formation of a new phosphate peak at 903”
Narwade 和 Khairnar - 2017 - Cobalt adsorption on the nano-hydroxyapatite matri DOI: 10.1515/bpasts-2017-0016
このバンドを持つスペクトルがありますか？
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