What absorbs at 1238 cm⁻¹ in an FTIR spectrum?
A band near 1238 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 |
|---|---|---|---|
| C-O single bond | 6 | 6 | 1,0 |
| Amide | 4 | 4 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Sulfur | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 0,95 |
| Acetyl | 1 | 1 | 0,9 |
| Hydroxyl (O-H) | 1 | 0 | 0,6 |
| Lignin | 1 | 0 | 0,6 |
| Carbohydrate | 1 | 0 | 0,6 |
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
-
Protein confiance 1,0
“The intensity of the cm-1 bands in the 1238-1244 region also decreased in the purified samples, which may be due to the elimination of a small fraction of protein.”
Ashurov 等 - 2021 - Characterization of polysaccharides from Eremurus DOI: 10.21285/2227-2925-2021-11-2-281-289 -
C-O single bond confiance 1,0
“assigned to stretching CO”
Rukman 等 - 2019 - GO-Fe3O4 Nanocomposite from coconut shell Synthes DOI: 10.1088/1755-1315/217/1/012008 -
Amide confiance 1,0
“Explicit assignment: '1238cm-1 for the control and historical samples'”
Fouda 等 - 2022 - Investigate the role of fungal communities associa DOI: 10.1038/s41529-022-00296-4 -
Amide confiance 1,0
“Text: 'peaks at 1314 and 1238 cm-1(C-N stretch, N-H bend, C=O-N bend) are related to amide III'”
Govari 等 - 2021 - Quest of Intelligent Research Tools for Rapid Eval DOI: 10.3390/foods10020264 -
Sulfur confiance 1,0
“Text: 'S at 1237.58cm'”
Rajam 等 - 2013 - Allium Sativum (Garlic) Extract as Nontoxic Corros DOI: 10.1155/2013/743807 -
Phosphate (PO4) confiance 0,95
“Explicit assignment: 'cm21 (nasPO22) Asymmetric phosphate stretching vibrations 1238 cm21'”
Gajjar 等 - 2014 - Histology Verification Demonstrates That Biospectr DOI: 10.1371/journal.pone.0082416 -
Acetyl confiance 0,9
“Text: 'acetyl group absorption band and the peak showed at 1238'”
Del Castillo-Llamosas 等 - 2021 - Hydrothermal treatment of avocado peel waste for t DOI: 10.1016/j.biortech.2021.125981 -
C-O single bond confiance 0,9
“vibrations of C(O)-O bonds of ether groups”
Korolkov 等 - 2020 - Modification of PET Ion-Track Membranes by Silica DOI: 10.3390/membranes10110322
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