What absorbs at 477 cm⁻¹ in an FTIR spectrum?
A band near 477 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 6 cited sources
Réponse rapide
A band near 477 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 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 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 |
|---|---|---|---|
| Silica nanoparticles | 477, 1718, 2925 | Silicon-oxygen (Si-O), Alkyl C-H | 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 477 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
-
Metal oxygen confiance 1,0
“The first band band position is due to the difference in the discm-1 at 477.25 represents the vibration due to metal-oxygen tances for the octahedral and tetrahedral complexes.”
Influence of cobalt substitution on structural, optical, electrical and magnetic properties of nanosized lithium ferrite DOI: 10.1007/s10854-018-9744-2 -
confiance 1,0
“The cm-1 cm-1 peak observed at 477 and 620 can be assigned Experimental Fish and Acclimatization: The work was to Ni-O and Ni-O-H bond, respectively.”
Aziz 等 - 2021 - Effect of Engineered Nickel Oxide Nanoparticles on DOI: 10.29261/pakvetj/2021.044 -
Nucleic acid confiance 1,0
“The Raman spectrum of DNA TFs exhibited 6 O TiO 2] in the DNA and DNA-CT TFs increased due to the characteristic Raman bands centered at around 477, 678, 732, cto physical interactions between them.”
Dugasani 等 - 2019 - Optoelectronic properties of DNA thin films implan DOI: 10.1063/1.5063446 -
confiance 1,0
“SiO 2-NPs were suspended in saline solution, spectral bands detected were 477 for Si-O out of cm-1 cm-1 cm-1 plane deformation, 801 for Si-O bending, 970 for Si-OH stretching, 1097 for Si-O-Si asymmetric stretching (Figure 1b).”
Astrocytes Are More Vulnerable than Neurons to Silicon Dioxide Nanoparticle Toxicity in Vitro DOI: 10.3390/toxics8030051 -
Alkyl C-H confiance 1,0
“bending vibration bands were recognized at 601 and 477cm-1 The stretching mode energy responds to variations in unit [35], the bending of C-H was observed at 875 cm-1 cell volume via two mechanisms: shifts in bond length and [36].”
Ismail 等 - 2023 - The role of nanoparticles inclusion in monitoring DOI: 10.1007/s41779-023-00836-4 -
Carbohydrate confiance 1,0
“LLM confirmed rule peak-group candidate”
Vibrational and fluorescence spectroscopy to study gluten and zein interactions in complex dough systems DOI: 10.1016/j.crfs.2022.02.009
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