What absorbs at 2911 cm⁻¹ in an FTIR spectrum?
A band near 2911 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
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 | 5 | 5 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
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
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Alkyl C-H 置信度 1.0
“A broad peak at cm-1 3334 was ascribed to the -OH of adsorbed water on the surface of the nanoparticles, whereas a peak at cm-1 2911 represented the C-H bending of a methyl group in the cellulose structure.”
Nanocellulose-silica polyethersulfone hybrid composite stabilized lipase for esterification DOI: 10.1063/1.5125521 -
Alkyl C-H 置信度 1.0
“The peak intensity at cm-1 cm-1 2911 was related to C-H stretching vibration, while the peak at 1643 was attributed to H-O-H stretching vibration of absorbed water from carbohydrate.”
Liew 等 - 2016 - 4-Methylcatechol-treated Jute-Bamboo Hybrid Compos DOI: 10.1016/j.carbpol.2003.11.015 -
Alkyl C-H 置信度 1.0
“For PVC, C H stretching mode can be S.Rameshetal./SpectrochimicaActaPartA66(2007)1237-1242 1239 Table2 VibrationalmodesandwavenumbersexhibitedbyPMMA Wavenumbers(cm-1) Descriptionofvibrations References C Hstretching 2927-2986 [30,32] C Ostr”
Ramesh 等 - 2007 - FTIR studies of PVCPMMA blend based polymer elect DOI: 10.1016/j.saa.2006.06.012 -
Alkyl C-H 置信度 1.0
“(cm-1) Functional group Sample B Sample C Sample E Sample F (stock PE) sp3 C-H stretching 2911 & 2845 2920 & 2851 2919 & 2851 2910 & 2846 2912 & 2845 CH bending”
Suardy 等 - 2020 - Analysis and Characterization of Microplastic from DOI: 10.17576/jsm-2020-4909-21 -
Alkyl C-H 置信度 1.0
“3190 OH Stretching vibration 1647-1717 C═O Stretching vibrations 2911 CH2 Asymmetric stretching”
Modification of surface characteristic and tribo-electric properties of polymers by DBD plasma in atmospheric air DOI: 10.1051/epjap/2017170149 -
Carboxyl (COOH) 置信度 1.0
“ering HAA(l) and HAA(g), O-H characteristic peak is slightly shifted at 3340 cm-1, the peaks at 2924 and 2854 are merged in a single smaller peak at 2911 cm-1, the peak associated with the carboxyl group is shifted as well to 1746 cm-1.”
Organic Bio-Based Aerogel from Food Waste: Preparation and Hydrophobization DOI: 10.3390/gels8110691 -
Hydroxyl (O-H) 置信度 1.0
“The spectrum of MWCNTs exhibits characteristic peaks at 3396 and 2911 cm-1 represents -OH and C=O stretching vibrations of”
The Effect of MWCNTs Filler on the Absorbing Properties of OPEFB/PLA Composites Using Microstrip Line at Microwave Frequency DOI: 10.3390/ma13204581
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