What absorbs at 1339 cm⁻¹ in an FTIR spectrum?
A band near 1339 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 1339 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 |
| N h | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Phospholipid | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Protein alpha helix | 1 | 1 | 0.8 |
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 |
|---|---|---|---|
| Fe3O4 | 1339, 2358, 1673 | Alkyl C-H, N h | 1 |
| nanoparticles | 1339, 1732, 1647 | Alkyl C-H | 1 |
| Fe3O4 nanoparticles | 1339, 1673, 1470 | Alkyl C-H, N h | 1 |
| ZnO | 1339, 1400, 3430 | Alkyl C-H | 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 1339 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
“The obtained data is in agreement with the Qingbo et al research on gastric cancer spectra, indicted the band at 1457 cm-1 is symmetric and asymmetric CH3 bending of the methyl groups of lipid, protein, nucleic cm-1 acid, respectively, and”
Ghassemi 等 - 2021 - Diagnosis of normal and malignant human gastric ti DOI: 10.1016/j.molstruc.2020.129493 -
Alkyl C-H 信頼度 1.0
“1380-1200 1380-1200 1380-1200 1380-1200 CH wagging [36-40] 2 Collagen CH vibration 1339”
Detection of Human Cholangiocarcinoma Markers in Serum Using Infrared Spectroscopy DOI: 10.3390/cancers13205109 -
Phospholipid 信頼度 1.0
“(PO2-) 1458 and 1396 The phosphodiester groups arise lipids arises at 1462 cm-1, cm-1,1174 cm-1 cm-1, 1233 and 1079 which from phospholipids bands at 1339”
Toxicity mechanism of Cu2+ ion individually and in combination with Zn2+ ion in characterizing the molecular changes of Staphylococcus aureus studied using FTIR coupled with chemometric analysis DOI: 10.1007/s10867-020-09560-7 -
Alkyl C-H 信頼度 1.0
“cm-1 C-C and C-O stretching exhibited the peak at 1148 However, the peak at 1339 of the infrared wavenumbers indicated CH bending modes [61].”
Extraction and Characterization of Potential Biodegradable Materials Based on Dioscorea hispida Tubers DOI: 10.3390/polym13040584 -
Amide 信頼度 1.0
“The bands in 1339 and 1596 were due to the C-N and R-NH bonds, respectively.”
Silveira 等 - 2021 - DOI: 10.1590/0366-69132021673833101 -
信頼度 1.0
“Thus, the kinetic analysis was carried out only considering by much more intensified signals of surface-adsorbed species: the plasma CO hydrogenation in the presence of ZnO and 2 cm-1 the peaks at 1339 and 1304 are assigned to the adsorbed”
Sun 等 - 2022 - Plasma-Catalytic CO2 Hydrogenation over a PdZnO C DOI: 10.1021/jacsau.2c00028 -
Alkyl C-H 信頼度 1.0
“cm-1), cm-1), cm-1) (1778 esters (1730 and the C-H, =CHbanding group (1339 were cm-1) cm-1) and C-H vinyl group (3013-3016 cm-1) were identified in stage b.”
Wzorek 等 - 2021 - Thermal Decomposition of Olive-Mill Byproducts A DOI: 10.3390/en14144123 -
Protein alpha helix 信頼度 0.8
“Text mentions 'bands (1339 and 1317) ... α-helix'.”
Thermally induced gluten modification observed with rheology and spectroscopies DOI: 10.1016/j.ijbiomac.2021.01.008
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