What absorbs at 1344 cm⁻¹ in an FTIR spectrum?
A band near 1344 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
快速回答
A band near 1344 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.
可能的官能基指派
| 官能基 | 支持事實 | 引用來源 | 最高信心 |
|---|---|---|---|
| Methoxy (OCH3) | 4 | 4 | 1.0 |
| Methacrylate | 4 | 4 | 1.0 |
| C-O single bond | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| Nitro (NO2) | 1 | 1 | 1.0 |
| S s | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Amine primary | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
排名反映累積的文獻證據，而非單一權威規則。請務必根據您的樣品背景進行確認。
可能的材料
| 材料 | 支持峰 | 重疊基團 | 引用來源 |
|---|---|---|---|
| diamond | 1344, 1378, 1332 | Methoxy (OCH3) | 1 |
僅當同一文獻庫支援此波段以及至少一個額外特徵峰時，才會顯示材料。
光譜邏輯
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 1344 cm⁻¹ is usually not enough for material identification by itself.
實際使用
此類查詢常見於聚合物鑑別、未知塑膠篩選、品管故障排除、再生材料驗證，以及基於文獻的峰值歸屬審查。
常見錯誤
- 將一個孤立的譜帶視為材料的證據，而未檢查至少一兩個支持峰。
- 忽略重疊：多個官能團可能在相同波數附近貢獻。
- 當添加劑、混合物、氧化或污染物可能扭曲譜圖時，跳過驗證。
驗證建議
當仍然存在歧義時，使用DSC、GC-MS或TGA驗證假設，特別是對於混合物、降解樣品和填充聚合物。
這些指派背後的文獻
-
信心 1.0
“Recorded in Fig.2(a), the incorporated nitrogen impurity in the form of single substitutional atoms (C-centers) is corresponding to the peaks at 1344cm-1, 1130 and which is attributed to typical Ib”
B–C Bond in Diamond Single Crystal Synthesized with h-BN Additive at High Pressure and High Temperature DOI: 10.1088/0256-307X/33/2/028101 -
信心 1.0
“Characteristic absorption for C-centers (single substitutional N atoms).”
Li 等 - 2017 - Synthesis of n-type semiconductor diamond single c DOI: 10.1088/1757-899X/274/1/012131 -
Acetate 信心 1.0
“peaks located at 1147, 1344, and 1369 due to C-O stretching vibrationofesterandCH3bendingvibrationoflipid.Thepeaks 1344cm-1 around 1083, 1137, 1186, and are caused by C-O distinguished from the absorption.”
Wu 等 - 2023 - Infrared and Terahertz Spectra of Pu'er White Tea DOI: 10.1155/2023/3290917 -
信心 1.0
“5 illustrates that nitrogen in diamond is predominantly in cm-1 at the C-form with strong and sharp peaks at 1130 and 1344 cm-1) low temperature (below 1500 °C).”
Yan 等 - 2016 - The effect of phosphorus and nitrogen co-doped on DOI: 10.1016/j.ijrmhm.2015.08.009 -
Hydroxyl (O-H) 信心 1.0
“1400 OH Stretch Overtone 1344 SiO 4 1050 Fe-O-Si/Si-O-Si”
do Nascimento-Dias 等 - 2020 - Detection of organic or inorganic material in Mart DOI: 10.1017/S147355042000021X -
Alkyl C-H 信心 1.0
“cm-1 In the case of pure PEO, for the distinctive peaks between 800-1400 in the spectrum, the cm-1, stretching vibration peak of C-O-C splits into three peaks at 1146, 1110, and 1062 and the two cm-1 bands appeared at 1344, and 1359 can be”
Preparation and Composition Optimization of PEO:MC Polymer Blend Films to Enhance Electrical Conductivity DOI: 10.3390/polym11050853 -
Aromatic ring 信心 1.0
“The symmetrical stretching frequency of the benzene rings become intense at 1555 The C=C symmetrical conjugated bond stretching frequency of the benzene rings becomes intense at 1344 cm-1.”
Aktas 等 - 2020 - A Novel Ag-N-Heterocyclic Carbene Complex Bearing DOI: 10.3390/cryst10030171 -
Alkyl C-H 信心 1.0
“cm1 cm1 cmprincipal bands at 3561, 3496 (stretching of O-H bonds), 1724 (stretching of C = O), 1344 1 cm1 cm1 (bending of C-H bonds), 1282, 1269, 1251 (stretching of C-O bonds), and 1046 (stretching of”
Ali 等 - 2023 - Nitazoxanide and azithromycin for the early treatm DOI: 10.21203/rs.3.rs-1745239/v1
有包含此波峰的圖譜嗎？
上傳您的FTIR圖譜，幾秒內即可獲得完整的解讀報告——包含帶有文獻引用的峰位指派、圖譜庫比對以及信心等級評估的證據鏈。