What absorbs at 911 cm⁻¹ in an FTIR spectrum?
A band near 911 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 911 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Bromine | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Ammonium | 1 | 1 | 1.0 |
| Styrene | 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 911 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
“These peaks represent C-H (PB).33,34 cm(cid:3)1 Another peak was observed around 911 bending of trans-alkene in polybutadiene wave number for the LP of CRMA interacted at 190-50 that represents the C-H bending of PB.34 At the aforementioned”
Effect of used motor oil as a rejuvenator on crumb rubber modifier’s released components to asphalt binder DOI: 10.1177/1477760620918600 -
Alkyl C-H 信頼度 1.0
“910a 914b P-O-(C) stretch/CH wagging 911 909 3 10071”
Gillens 和 Powell - 2013 - Rapid quantification of TBP and TBP degradation pr DOI: 10.1007/s10967-012-2147-6 -
信頼度 1.0
“795.33cm(cid:2)1 (Si-O stretch) and absorption from trioctahedrals), 910.81cm(cid:2)1 (Al 2OH bending) shown in Fig.”
Ultrasonic extraction of arsenic and selenium from rocks associated with mountaintop removal/valley fills coal mining: Estimation of bioaccessible concentrations DOI: 10.1016/j.chemosphere.2010.01.020 -
Ammonium 信頼度 1.0
“In the present work, the spectral study of the solution UNIVERSITY 21 209 prepared using ammonium molybdate salt shows strong (broad and sharp) absorption bands at 911±2, 889±2 22 cm-1 cm-1 210 23 and 856±2 (Fig.”
Sen 等 - 2015 - Nanogram level quantification of molybdenum(VI) by DOI: 10.1039/C5AY01801C. -
Alkyl C-H 信頼度 1.0
“The last peaks (910.91 and cm-1) 877.69 correspond to a bending out of plane vibration =CH (aromatic ring).”
Belo 等 - 2018 - Development of a Black Liquor Electrolyzer for Lig DOI: 10.1149/08604.0003ecst -
Acetate 信頼度 1.0
“by the presence of C-O stretching at 911 Other characteristic IR bands can be”
Thermal and surface properties of hybrid materials obtained from epoxy-functional urethane and siloxane DOI: 10.1007/s00289-015-1545-7 -
C c single bond 信頼度 1.0
“u n cm-1 The wavenumbers separating normal tissue from meningioma are 911 (C-C stretching d e cm-1 cm-1 r ≈964”
Gajjar 等 - 2013 - Diagnostic segregation of human brain tumours usin DOI: 10.1039/C2AY25544H. -
信頼度 1.0
“On the other hand, the weak negative band cm-1 at 911 was assigned to the C15-H and N-H HOOP vibrations of the original state of BR [35].”
Kawanabe 和 Kandori - 2009 - Photoreactions and Structural Changes of Anabaena DOI: 10.3390/s91209741
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