What absorbs at 2981 cm⁻¹ in an FTIR spectrum?
A band near 2981 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
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Alkyl C-H | 6 | 6 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Bibliographie derrière ces attributions
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Hydroxyl (O-H) confiance 1,0
“And vibrational frequencies are 3767 for surface OH and 2981 cm-1 for in-plane OH at site 1, respectively.”
The investigation of adsorption and dissociation of H2O on Li2O (111) by ab initio theory DOI: 10.1016/j.apsusc.2017.02.133 -
Hydroxyl (O-H) confiance 1,0
“cm-1 cm-1 SM showed many intense peaks at 3324 for the acidic O-H, 2981 for the acidic showed many intense peaks at 3324 cm-1 for the acidic O-H, 2981 cm-1 for the acidic - cm-1 cm-1 -CH=CH- (aryl) str, 2884 for C-H (alkyl) str, 1635 for th”
Boosting the Anticancer Activity of Sunitinib Malate in Breast Cancer through Lipid Polymer Hybrid Nanoparticles Approach DOI: 10.3390/polym14122459 -
Alkyl C-H confiance 1,0
“cm-1 cm-1 spectral regions at 3347 (OH symmetric and asymmetric stretching), 2981 (methyl group cm-1 C-H stretching), 1247 (among others C-H stretching and O-H deformations in carbohydrates), cm-1”
Pleurotus Mushrooms Content in Glucans and Ergosterol Assessed by ATR-FTIR Spectroscopy and Multivariate Analysis DOI: 10.3390/foods9040535 -
Alkyl C-H confiance 1,0
“cm-1 The four sub bands of the C-H absorption are centered at about 2981, 2938, 2911, and 2877 at room temperature.”
The Role of Backbone Hydration of Poly(N-isopropyl acrylamide) Across the Volume Phase Transition Compared to its Monomer DOI: 10.1038/s41598-017-17272-7 -
Alkyl C-H confiance 1,0
“It was noted that CS/PVP composites show a complex region of CH Therefore, the ratio of intensities I 2930/I was chosen to characterise the influence of 2981 and CH2 stretching vibrations with contribution from both type of molecules [36].”
Electrospun Fibres of Chitosan/PVP for the Effective Chemotherapeutic Drug Delivery of 5-Fluorouracil DOI: 10.3390/chemosensors9040070 -
Alkyl C-H confiance 1,0
“We also observed the rising of negative bands at 2981 and cm-1 from CH stretching vibrations (not shown in Figure 3).”
Kumar 和 Barth - 2010 - Following Enzyme Activity with Infrared Spectrosco DOI: 10.3390/s100402626 -
Alkyl C-H confiance 1,0
“The micro-structure and The CH asymmetric stretching band appeared at 2981 AM.”
A KBr-impregnated paper substrate as a sample probe for the enhanced ATR-FTIR signal strength of anionic and non-ionic surfactants in an aqueous medium DOI: 10.1039/d0ra07286a -
Alkyl C-H confiance 1,0
“yellow solid, mp IR: 1502, 1541, 1600 aromatic spectrometer using CDCl as solvent and TMS as the internal stand- (C=O 3 cm-1 stretch), 1731 stretch), 2981 (C-H aliphatic stretch), 3126 ard.”
Nikpassand 等 - 2017 - Green synthesis of novel 2-pyrazolyl-1,3-thiazolid DOI: 10.1515/hc-2017-0124
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