What absorbs at 1141 cm⁻¹ in an FTIR spectrum?
A band near 1141 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
Possíveis atribuições de grupos funcionais
| Grupo funcional | Fatos de suporte | Fontes citadas | Maior confiança |
|---|---|---|---|
| C-O single bond | 8 | 8 | 1,0 |
| Methoxy (OCH3) | 6 | 6 | 1,0 |
| Methacrylate | 6 | 6 | 1,0 |
| Acetate | 6 | 6 | 1,0 |
| Alkyl C-H | 5 | 4 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
A classificação reflete a evidência acumulada da literatura, não uma única regra autoritária. Sempre confirme com o contexto da sua amostra.
Literatura por trás destas atribuições
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Aromatic ring confiança 1,0
“The strongest peak appears at 1141 which arise from the stretching cm-1 cm-1 vibration of C═N from quinoid ring protonated.”
International Conference on Innovation on Polymer Science and Technology DOI: 10.1088/1757-899X/223/1/012051 -
N h confiança 1,0
“The three sericin-PVA showed weak to aldehyde group with OH groups of the PVA chain medium, broad hydrogen-bonded bands that result from the or possibly the contribution of the remaining acetate groups of structure.23 overlap of free and bo”
Manesa 等 - 2022 - Fabrication and Characterization of Sericin-PVA Co DOI: 10.1021/acsomega.2c00897 -
Alkyl C-H confiança 1,0
“The band at 1141 is attrib(cid:2) group in uted to the C-H bending vibration of -CH The FTIR spectra of the thermally polymerized”
Surender 等 - 2014 - Bismaleimide and Bispropargyl Ether Blends Curing DOI: 10.1134/S1560090414050157 -
Acetate confiança 1,0
“While the peak at 1141 indicates the stretching of C-O cm-1 from the crystalline sequence of PVA, the peak at 1073 indicated the stretching of C-O from the amorphous sequence of PVA [23].”
Poly(vinyl alcohol) Nanocomposites Reinforced with Bamboo Charcoal Nanoparticles: Mineralization Behavior and Characterization DOI: 10.3390/ma8084895 -
Alkyl C-H confiança 1,0
“temperature is lower than 45 °C, which is attributed to the cm-1 C-H An important absorbance peak at 1141 is usually minor influence of the diffused water on the bonds.”
Xue 等 - 2015 - Moving-window two-dimensional correlation infrared DOI: 10.1007/s00216-015-9035-1 -
C-O single bond confiança 1,0
“but when sodium alginate was present in large quantities and was highly concentrated, three peaks that express the functional group's formula appeared, with absorption ranges cm-1 cm-1 of 1141 and 1268 due to the extended vibration of the C”
ALSamman 和 Sanchez - 2023 - Adsorption of Copper and Arsenic from Water Using DOI: 10.3390/polym15092192 -
Acetate confiança 1,0
“Finally, the bands at 1141 and 843 water, glycerol and diiodomethane on the PU As are due C-O-C expected, the hydrophilicity of the substrata increased with to the asymmetric and symmetric vibrations, PEG grafting density as shown by the wa”
Effect of PEG grafting density on surface properties of polyurethane substrata and the viability of osteoblast and fibroblast cells DOI: 10.1007/s10856-022-06668-1 -
N-O bond confiança 1,0
“Fe-O vibrational 1003cm-1 modes in FeOOH were ascribed at 1640, 1363, and for the PPy NPs peak at due to the out-of-plane 1141cm-1 in the PFFs spectra while there were no peaks in bending C-H bond [31, 34-36].”
Diauudin 等 - 2020 - Preparation and Characterisation of Polypyrrole-Ir DOI: 10.1155/2020/8762969
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