What absorbs at 579 cm⁻¹ in an FTIR spectrum?
A band near 579 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 7 cited sources
Réponse rapide
A band near 579 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 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 0,7 |
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 |
|---|---|---|---|
| TiO2 | 579, 1700, 1093 | Metal oxygen, Methacrylate, C-O single bond | 1 |
| copper oxide | 579, 624, 1686 | Metal oxygen, Methacrylate | 1 |
| copper oxide nanoparticles | 579, 624, 1317 | Metal oxygen, Methacrylate | 1 |
| TiO2 nanoparticles | 579, 1700, 455 | 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 579 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
-
C c single bond confiance 1,0
“The band at 579 is possibly TIS-tar assignable to C C ring deformations in polycyclic aromatic hydroTransmittance”
Sun 等 - 2012 - Effect of polymerization with paraformaldehyde on DOI: 10.1016/j.tca.2012.03.015 -
Alkyl C-H confiance 1,0
“LLM confirmed rule peak-group candidate”
Development of New Amphiphilic Catalytic Steam Additives for Hydrothermal Enhanced Oil Recovery Techniques DOI: 10.3390/catal12080921 -
confiance 1,0
“156 cm-1 In the spectra of pure TiO 2, the peak observed at 578.5481 is due to the stretching cm-1 vibration of Ti-O, and 1482.0269 shows stretching vibrations of Ti-O-Ti [20].”
Durai 等 - 2021 - INVESTIGATIONS ON STRUCTURAL, OPTICAL, AND IMPEDAN DOI: 10.4314/bcse.v35i1.13 -
confiance 1,0
“In the spectra of wCuO, Cu-O stretching band was observed at Transmittance 444 and 579 cm-1 and OH stretching at 3117 cm-1 (Figure 2b).”
Green and Traditional Synthesis of Copper Oxide Nanoparticles—Comparative Study DOI: 10.3390/nano10122502 -
Acetate confiance 1,0
“Additionally, the three absorption peaks at 1080 cm-1, 1031 1080 1031 and 579 are mainly due to the stretching vibrations of C-O cm-1, and 579 cm-1 are mainly due to the stretching vibrations of C-O and C-N, as well as and C-N, as well as t”
Shell of Viviparid Snail as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in 1 M HCl DOI: 10.3390/coatings13071136 -
confiance 0,7
“Text: 'peak near 579 might be attributed to the Mo-O bond'”
Rajesham 等 - 2022 - Synthesis, physical, optical and structural studie DOI: 10.21203/rs.3.rs-1495935/v1 -
Phosphate (PO4) confiance 0,7
“PO ν in region 579-592”
Seredin 等 - 2020 - Development of a new approach to diagnosis of the DOI: 10.1038/s41598-020-78078-8
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