What absorbs at 437 cm⁻¹ in an FTIR spectrum?
A band near 437 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 437 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 | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
| Triglyceride | 1 | 1 | 1,0 |
| Fatty acid | 1 | 1 | 1,0 |
| Bromine | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Metalloid oxygen | 1 | 1 | 0,9 |
| Methoxy (OCH3) | 1 | 0 | 1,0 |
| Methacrylate | 1 | 0 | 1,0 |
| C-O single bond | 1 | 0 | 1,0 |
| Acetate | 1 | 0 | 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 |
|---|---|---|---|
| ZnO | 437, 1400, 3430 | Metal oxygen | 3 |
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 437 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
“We have observed six absorption peaks at 437, 917, 2157, 2852, 2925 and cm-1 3749 which are related to Zn-O, Al-N, N-O, Alkaline group, C-H stretching vibration and Zn-Al vibrational modes respectively.”
Enhancement of Al-N co-dopant solubility in ZnO by high temperature thermal annealing DOI: 10.1016/j.ceramint.2018.10.005 -
confiance 1,0
“The 437cm-1 E characteristic peak, assigned to the non-polar 2 optical phonon mode, is present for the pure and Mn-doped ZnO thin films, with a similar shape.”
Kharroubi 等 - 2012 - Mn doping effect on the structural properties of Z DOI: 10.1088/0031-8949/86/01/015805 -
confiance 1,0
“The peak at around 437 is assigned to sized Mg(OH) prepared using EDA and TEA (Fig.”
Mageshwari 和 Sathyamoorthy - 2012 - Studies on Photocatalytic Performance of MgO Nanop DOI: 10.1007/s12666-011-0106-5 -
confiance 1,0
“The Raman bands at 583 and intensity of Raman band at 437 decreased with cm-1 are associated with structural disorders, such as oxygen doping concentration into ZnO that may be attributed to 660 Mn vacancy, the Zn interstitial, impurity ato”
Vinod 等 - 2015 - Quenching and blue shift of UV emission intensity DOI: 10.1016/j.mseb.2014.10.004 -
Silicon (Si) confiance 1,0
“437cm-1 phological change observed in the synthesized The band at is related to the Si-O-Si bending geopolymer is due to the dissolution of metakaolin aluvibration.”
El Alouani 等 - 2019 - Preparation, Characterization, and Application of DOI: 10.1155/2019/4212901 -
confiance 1,0
“Wefoundthe520cm-1,460cm-1,437cm-1 and417cm-1 cm-1 peakswithinthe300-600 range, due to the presence of C-X bonds (X = halogen: Cl, Br, I), as well as of plane defor-”
Determination of the Conservation State of Some Documents Written on Cellulosic Support in the Poni-Cerntescu Museum, Iași City in Romania DOI: 10.3390/app11188726 -
Fatty acid confiance 1,0
“3A shows the FTIR spectra between 4000 and 400 The oil spectrum is characterized 437 by several bands (peaks), mainly attributed to the presence of oleic and linoleic fatty acids, 438 triglycerides and peroxides.”
Kharbach 等 - 2021 - New insights into the Argan oil categories charact DOI: 10.1016/j.talanta.2020.122073 -
Metal oxygen confiance 1,0
“[65] assigned the band at 437 cm-1 in silicate structures to Mg-O stretch + O-Si-O”
Zviagina 等 - 2020 - Distinguishing Features and Identification Criteri DOI: 10.3390/min10020153
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