What absorbs at 1004 cm⁻¹ in an FTIR spectrum?
A band near 1004 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 1004 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 4 | 2 | 1.0 |
| Silicon (Si) | 3 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 2 | 1 | 1.0 |
| Phosphorus | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 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 |
| Amino acid | 1 | 1 | 1.0 |
| S eq o | 1 | 0 | 1.0 |
| Sulfonyl | 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。
可能性のある材料
| 素材 | 補助ピーク | 重複グループ | 引用元 |
|---|---|---|---|
| kaolinite | 1004, 3696, 693 | Silicon-oxygen (Si-O), Silicon (Si), Siloxane (Si-O-Si) | 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 1004 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
-
Amino acid 信頼度 1.0
“LLM confirmed rule peak-group candidate”
Ngarize 等 - 2005 - A comparative study of heat and high pressure indu DOI: 10.1016/j.foodhyd.2004.12.008 -
Silicon (Si) 信頼度 1.0
“cm-1 cm-1 The moderately strong broad band at 1033 and the strong sharp band at 1004 correlated to the antisymmetric and symmetric stretching modes of Si-O-Si, respectively [20].”
Souissi 等 - 2022 - Synthesis, Thermal Properties and Electrical Condu DOI: 10.21203/rs.3.rs-1294285/v1 -
Phosphate (PO4) 信頼度 1.0
“Moreover, the evident sharp absorption peak at 1004 is ascribed to the symmetrical stretching of PO 2”
Dai 等 - 2020 - Effects of a Reactive Phosphorus-Sulfur Containing DOI: 10.3390/polym12071441 -
Acetate 信頼度 1.0
“cm-1 cm-1 cm-1 1256 (amide III vibration modes), 1163 and 1062 (C-O-C bridge stretching), cm-1 cm-1 1004 and 968 (C-O stretching vibration in secondary and primary OH groups).”
Physicochemical Properties and Functional Characteristics of Ecologically Extracted Shrimp Chitosans with Different Organic Acids during Demineralization Step DOI: 10.3390/molecules27238285 -
Silicon (Si) 信頼度 1.0
“cm-1 appeared at 2921.4 and The band at 1003.5 is assigned to Si-O bond.”
Liu 等 - 2014 - NIR initiated and pH sensitive single-wall carbon DOI: 10.1039/C3TB21362E. -
Hydroxyl (O-H) 信頼度 1.0
“cm-1 At 1004 attributed to stretching, OH coupled with bending CO of capsule and pneumoniaeCol-S K.”
Evaluation of Chemical Changes in Laboratory-Induced Colistin-Resistant Klebsiella pneumoniae DOI: 10.3390/ijms22137104 -
Ring structure 信頼度 1.0
“For all cm-1 of the samples, the narrow band near 1004 corresponded to the ring vibration of Phe”
Ex Vivo Vibration Spectroscopic Analysis of Colorectal Polyps for the Early Diagnosis of Colorectal Carcinoma DOI: 10.3390/diagnostics11112048 -
Phosphate (PO4) 信頼度 1.0
“The 1004 peak representing ferric phosphate still unreacted rust.”
Rust Conversion Performance of Phosphoric Acid-Gallic Acid in Vinyl Chloride Acrylic Emulsion DOI: 10.3390/coatings11020152
このバンドを持つスペクトルがありますか？
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