What absorbs at 891 cm⁻¹ in an FTIR spectrum?
A band near 891 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 891 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 |
|---|---|---|---|
| Alkyl C-H | 5 | 4 | 1.0 |
| Methoxy (OCH3) | 3 | 3 | 1.0 |
| Methacrylate | 3 | 3 | 1.0 |
| C-O single bond | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| Alkene (C=C) | 2 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Bromine | 1 | 1 | 1.0 |
| Carbon bromine | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 0 | 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 |
|---|---|---|---|
| ZnO | 891, 1400, 3430 | Alkyl C-H, Methacrylate, C-O single bond | 1 |
| iron oxide | 891, 1130, 1744 | Alkyl C-H, Methoxy (OCH3), Methacrylate | 1 |
| ZnO nanoparticles | 891, 1219, 1726 | Alkyl C-H, Methacrylate, C-O single bond | 1 |
| bacterial cellulose | 891, 1050, 1631 | Alkyl C-H, Methoxy (OCH3), Methacrylate | 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 891 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
-
Metal oxygen 信心 1.0
“inter bridges between corner-sharing WO octahedra 6 cm-1), b (*891 stretching of W-O e-W intra bridges cm-1) (*815 between edge-sharing WO octahedra and 6 cm-1).”
Rao 和 Rajkumar - 2008 - Investigation of 12-tungstophosphoric acid support DOI: 10.1007/s10562-007-9279-2 -
Alkyl C-H 信心 1.0
“The lower band and peak at 891 and 690 represent the C-H of aromatics, N-H of primary and secondary amines, and alkyl halides C-Br stretch, respectively [41].”
Abdelmigid 等 - 2022 - Green Synthesis of Zinc Oxide Nanoparticles Using DOI: 10.3390/molecules27041236 -
Acetate 信心 1.0
“The main cm-1 cm-1 intensity at 1274 is assignable to C-O deformation from the -COOH and the band at 891 is belonging bonds40,41.”
Influence of gamma irradiation on rosin properties and its antimicrobial activity DOI: 10.1038/s41598-023-31372-7 -
信心 1.0
“cm-1 cm-1, 1605 and 3383-3601 being assigned to the vibrational modes of the deformation IR bands of PTA situated at 523 cm-1, 594 cm-1, 797 cm-1, 891 cm-1, 982 cm-1, 1080 cm-1, 1605 (O corresponds to corner oxygen atoms), W-O e-W stretchin”
The Photoluminescence and Vibrational Properties of Black Phosphorous Sheets Chemically/Electrochemically Functionalized in the Presence of Diphenylamine DOI: 10.3390/polym14214479 -
Amide 信心 1.0
“Independently of the initial C/N ratio in the (r2 (r2 = = 0.73), F1 were found for the bands 891 1151 upper part, the highest negative loading of C/N on F1 and”
Biester 等 - 2014 - Comparison of different methods to determine the d DOI: 10.5194/bg-11-2691-2014 -
信心 1.0
“suber of before Cu(II) adsorption showed a peak cm-1which corresponds to a C-H deformation at 891 cm-1 in cellulose.”
Mebarki 等 - 2019 - Lignocellulosic fraction of the pericarps of the a DOI: 10.2478/pjct-2019-0028 -
Ring structure 信心 1.0
“The peak intensity positioned while the 891 cm-1 peak belongs to α-glucopyranose ring deformation modes of the C-O cm-1 at 766 is characteristic to a1, 3 of the glycoside unit in dextran [49].”
Preparation and Characterization of Dextran Coated Iron Oxide Nanoparticles Thin Layers DOI: 10.3390/polym13142351 -
Acetate 信心 1.0
“1050 1030 1050 C-O stretching 891 889”
Pre-treatment effect on the structure of bacterial cellulose from Nata de Coco (Acetobacter xylinum) DOI: 10.14314/polimery.2022.3.3
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。