What absorbs at 941 cm⁻¹ in an FTIR spectrum?
A band near 941 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 7 cited sources
快速回答
A band near 941 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 |
|---|---|---|---|
| C c single bond | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Alkene (C=C) | 2 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 0.5 |
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 |
|---|---|---|---|
| silica | 941, 1100, 1080 | Hydroxyl (O-H) | 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 941 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
-
Water (H2O) 信心 1.0
“The other three new peaks (the peaks cm-1 with 941, 2052 and 2357 values of wavenumber) are related with water and other mixtures existing in the sample.”
Huseynov 等 - 2018 - Fourier transform infrared spectroscopic study of DOI: 10.1142/S0217979218500741 -
Acetate 信心 1.0
“The starch spectrum exhibited three characteristic scattering peaks at 1263, Carr 1053, and 941 cm-1, which are due to the stretching of C-O, C-C, and C-OH bonds belonging to starch [37].”
Preparation and Characterization of Super-Absorbing Gel Formulated from -Carrageenan–Potato Peel Starch Blended Polymers DOI: 10.3390/polym13244308 -
Alkene (C=C) 信心 1.0
“Finally, the bands at 941 and 822 are assigned to the C=C vibrations of the C=C-C=O group, while that assigned to C-C-O skeleton vibration for pure cm-1 cm-1) ethanol appear at 1090 [50].”
El Hadad 等 - 2011 - Preparation of sol-gel hybrid materials from gamma DOI: 10.1007/s00396-011-2504-y -
Hydroxyl (O-H) 信心 1.0
“Castor oil showed a wide 430 band at 3450 cm-1 for hydroxyl groups, 2920 and 2850 cm-1 for CH2 and CH3 scissoring, 1743 cm-1 for 431 C-O ester groups, 1711 cm-1 for the stretching of C-O in free fatty acids, 1281 cm-1 for asymmetric C-O 432”
Vazquez-Gonzalez 等 - 2021 - Electrosprayed cashew gum microparticles for the e DOI: 10.1016/j.carbpol.2016.08.031 -
C c single bond 信心 0.9
“Text: '941 (νCC, rCH)'”
Sodium montmorillonite/ureasil-poly(oxyethylene) nanocomposite as potential adsorbent of cationic dye DOI: 10.1016/j.clay.2017.11.009 -
信心 0.9
“Text: 'We assign the band at 941 to the as(Mo-O)'”
Nagaraju 等 - 2007 - Hydrothermal synthesis of amorphous MoS2 nanofiber DOI: 10.1007/s11671-007-9087-z -
Alkyl C-H 信心 0.5
“Text: '941 Commons' likely refers to C-H band; context incomplete.”
Layered structure graphene oxide/methylcellulose composites with enhanced mechanical and gas barrier properties DOI: 10.1039/c8ta03651a
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。