What absorbs at 412 cm⁻¹ in an FTIR spectrum?
A band near 412 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 412 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 |
|---|---|---|---|
| Metal oxygen | 2 | 2 | 0,9 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
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 |
|---|---|---|---|
| Chitosan | 412, 1650, 1655 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
| polyethylene | 412, 1737, 1720 | Methacrylate, Methoxy (OCH3), C-O single bond | 1 |
| Glycerol | 412, 1585, 1630 | Methacrylate, C-O single bond, Methoxy (OCH3) | 1 |
| ZnO | 412, 1400, 3430 | Metal oxygen, Methacrylate, C-O single bond | 1 |
| zinc oxide | 412, 1627, 1638 | Metal oxygen, Methacrylate, C-O single bond | 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 412 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
-
confiance 1,0
“3 60,687 = = 412 3430 Weak deformation vibration O S O 411 62,778 1 59,348”
A case study of poly (aryl ether sulfone) hemodialysis membrane interactions with human blood: Molecular dynamics simulation and experimental analyses DOI: 10.1016/j.cmpb.2020.105742 -
Amide confiance 1,0
“(2) disappears in had new absorption peaks at 1,640 cm-1 1,412cm-1, 1,556 and corresponding to amide I peak (1,652 cm-1),”
Khodaei 等 - 2018 - Covalent Immobilization of Protein A on Chitosan a DOI: 10.1093/chromsci/bmy070 -
confiance 1,0
“For pastes with a 3:7 proportion (Fig 9a), 412 this band disappeared, which represents a complete consumption of the calcium 413”
Moraes 等 - 2019 - Production of bamboo leaf ash by auto-combustion f DOI: 10.1016/j.conbuildmat.2019.03.007 -
Hydrogen bond confiance 1,0
“M412 deprotonated retinylidene SB such as seen for the BR 3 Depending on the strength of the hydrogen bonding, bands M412 transition, where the SB of is deprotonated (27).”
Proton Transfers in a Channelrhodopsin-1 Studied by Fourier Transform Infrared (FTIR) Difference Spectroscopy and Site-directed Mutagenesis* DOI: 10.1358/dot.2011.47.1.1543306 -
Alkyl C-H confiance 1,0
“The and compared in the pure oil and in the deuterated fatty 349 412 cm-1 CC-H olefinic different peak from unsaturated lipids at 3008 tissues.”
Rejasse 等 - 2022 - Plastic biodegradation Do Galleria mellonella Lar DOI: 10.1021/acs.est.1c03417 -
C=n confiance 1,0
“This indicated that the homogeneous complex had been prepared could be due to υ(C=N) and υ(C-O), and the bands at about 605 and 412 cm-1 were associated with successfully.”
Base-Free Selective Oxidation of Glycerol over LDH Hosted Transition Metal Complexes Using 3% H2O2 as Oxidant DOI: 10.3390/catal6070101 -
Metal oxygen confiance 0,9
“Assigned to transverse optical stretching mode of ZnO.”
Kuthirummal 等 - 2016 - Synthesis and characterization of Ar-annealed zinc DOI: 10.1063/1.4964316 -
Metal oxygen confiance 0,9
“Explicit assignment: 'absorption bands at 419 and 412 attributed to the Zn-O stretching vibration mode'”
Gum Arabic As Natural Stabilizing Agent In Green Synthesis Of ZnO Nanofluids For Antibacterial Application DOI: 10.1016/j.jece.2019.103331
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