What absorbs at 2800 cm⁻¹ in an FTIR spectrum?
A band near 2800 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
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Alkyl C-H | 27 | 27 | 1.0 |
| Hydroxyl (O-H) | 4 | 4 | 0.8 |
| Lipid | 3 | 2 | 0.9 |
| Methyl | 2 | 2 | 0.9 |
| N h | 2 | 2 | 0.7 |
| Amine primary | 1 | 1 | 0.9 |
| Ester | 1 | 1 | 0.8 |
| Thiol | 1 | 1 | 0.7 |
| Nucleic acid | 1 | 1 | 0.5 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
这些分配背后的文献
-
置信度 1.0
“explicit assignment”
Presswood 等 - 2016 - Geochemical and petrographic alteration of rapidly DOI: 10.1016/j.coal.2016.08.022 -
Alkyl C-H 置信度 1.0
“Band centered around 2800 cm-1 represents C-H functional groups.”
Perez-Rosa 等 - 2022 - Influence of Nanoparticles on the Degradation Proc DOI: 10.3390/en15041520 -
Alkyl C-H 置信度 0.95
“Same as above.”
Vega 等 - 2010 - Effect of hydroxide and carbonate alkaline media o DOI: 10.1016/j.jpowsour.2010.05.030 -
Alkyl C-H 置信度 0.95
“Part of the 2950-2800 cm-1 range assigned to CH stretching.”
Celauro 等 - 2022 - Effect of Short-Term and UV Irradiation Aging on t DOI: 10.3390/su14116915 -
置信度 0.95
“Explicit assignment in text.”
Morowvat 等 - 2023 - Biosynthesis and Antimicrobial Evaluation of Zinc DOI: 10.3390/ma16020842 -
Alkyl C-H 置信度 0.9
“Explicitly stated as aliphatic C-H stretching range.”
Sanchez-Lemus 等 - 2016 - Characterization of Heavy Distillation Cuts Using DOI: 10.1021/acs.energyfuels.6b01912 -
Alkyl C-H 置信度 0.9
“Part of range 2852-2800”
Ali 等 - 2018 - Fourier-Transform Infrared Imaging Spectroscopy an DOI: 10.3389/fnins.2018.00647 -
置信度 0.9
“Text: 'The bonds detected at around 2800 ... are designated to the C-H stretching vibration of the CH3/CH2 groups.'”
Almousa 等 - 2021 - Paraffin Wax [As a Phase Changing Material (PCM)] DOI: 10.3390/cryst11080951
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