What absorbs at 1132 cm⁻¹ in an FTIR spectrum?
A band near 1132 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
Réponse rapide
A band near 1132 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Amide | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Sulfate (SO4) | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 0,9 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Matériaux possibles
| Matériel | Pics de support | Groupes chevauchants | Sources citées |
|---|---|---|---|
| polysaccharide | 1132, 1637, 1320 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
Les matériaux sont affichés uniquement lorsque le même ensemble de littérature soutient cette bande et au moins un pic caractéristique supplémentaire.
Logique du spectre
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1132 cm⁻¹ is usually not enough for material identification by itself.
Utilisation réelle
Ce type de requête est courant dans l＇identification des polymères, le criblage des plastiques inconnus, le dépannage du contrôle qualité, la vérification des matériaux recyclés et l＇examen de l＇attribution des pics appuyée par la littérature.
Erreurs courantes
- Traiter une bande isolée comme preuve d＇un matériau sans vérifier au moins un ou deux pics de support.
- Ignorer le chevauchement : plusieurs groupes fonctionnels peuvent contribuer près du même nombre d＇onde.
- Sauter la validation lorsque des additifs, des mélanges, l＇oxydation ou la contamination peuvent déformer le spectre.
Conseil de vérification
Lorsque l＇ambiguïté persiste, validez l＇hypothèse avec DSC, GC-MS ou TGA, en particulier pour les mélanges, les échantillons dégradés et les polymères chargés.
Bibliographie derrière ces attributions
-
Acetate confiance 1,0
“This means that increasing the J Mater Sci: Mater Electron cm-1 3-, the absorption peak at 1132 is peak of NO the characteristic peak of C-O bond, and the cm-1 absorption peak at 883 it may be due to the”
Annealing temperature on the microstructure and magnetic properties of magnesium–cobalt ferrite prepared by sol-gel self-propagating method DOI: 10.1007/s10854-020-04778-6 -
Acetate confiance 1,0
“cm-1) corresponding to the replacement of OH groups by NH2 groups on shoulder (3345 cm-1, cm-1,and cm-1 the surface of CG [8].We can also identify bands at 1132 1078 1013 cm-1, 1078 cm-1,and 1013 cm-1 the surface of CG [8].We can also ident”
Influence of Reduction with NaBH4 and HCl in Obtaining Amino Derivatives of Cashew Gum and Cytotoxic Profile DOI: 10.3390/polym15132856 -
Amide confiance 1,0
“The cm-1, negatively weighted peak at 1245 was due to amide III, and the negative weighted peaks around 1132 and cm-1 vibration31,32.”
Soil-applied selenite increases selenium and reduces cadmium in roots of Moringa oleifera DOI: 10.1038/s41598-020-77350-1 -
Sulfate (SO4) confiance 1,0
“February FTIR spectra of BSA, sodium sulfate, and goethite14,15,23,26,36,37 cm-1, spectrum that there is a strong absorption band at 1132 a under y (cm-1) which corresponds to the asymmetric sulfate stretching Wavenumber Vibrational peak as”
Kim 和 Grassian - 2023 - Analysis of microand nanoscale heterogeneities w DOI: 10.1039/d3em00005b -
Silicon (Si) confiance 1,0
“cm-1 cm-1 690 (curve 1) and 908 (curve 2) peak are 1267 3475 1473 1643 Si-Oassigned to the Si-O symmetric stretch and to the 1132 (3)”
Rangelova 等 - 2011 - MethylcelluloseSiO2 hybrids sol-gel preparation DOI: 10.2478/s11532-010-0123-y -
Amide confiance 1,0
“The spectrum for PEI cm-1 cm-1 shows the bands at 3263 (N-H stretch), 1474 (N-H bending), cm-1 cm-1 1132 (C-N stretch) and 750 (N-H bending) typical for this”
Shan 等 - 2020 - Polymer structure and property effects on solid di DOI: 10.1016/j.ijpharm.2020.119884 -
Acetate confiance 1,0
“1131.90 cm-1 are assigned to the stretching vibration of C-O-C in xanthate.”
Yu 等 - 2016 - The Desulfurization of Magnetite Ore by Flotation DOI: 10.3390/min6030070 -
Amide confiance 1,0
“This is indicated by the presence of the C-N stretch cm-1 at 1132 in the TEPA-treated CQD as compared to that of untreated CQD (PL 4 180).”
de Yro 等 - 2019 - Hydrothermal Synthesis of Carbon Quantum Dots from DOI: 10.1063/1.5094310
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