What absorbs at 447 cm⁻¹ in an FTIR spectrum?
A band near 447 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 447 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Phosphate (PO4) | 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.
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 447 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
-
Silicon-oxygen (Si-O) confiance 1,0
“The band at 447.49 is O-Si-O bending [11, 15, 16], at 794.67 cm-1 cm-1 is Si-OH stretching [11], and at 1087.85 is Si-O-Si stretching asymmetric [6, 15].”
Deswardani 等 - 2017 - Study of Structural and Magnetic Properties of Sil DOI: 10.1088/1757-899X/202/1/012047 -
Metal oxygen confiance 1,0
“LLM confirmed rule peak-group candidate”
Jalandhara 等 - 2016 - Effect of Sintering Temperature on the Optical Pro DOI: 10.1063/1.4946488 -
confiance 1,0
“cm-1 cm-1 around 400-600 The peak observed around 447 and 555 are attributed to the stretching vibrations modes of Fe-O bonds, which”
Effect of calcination temperature on structural and morphological properties of bismuth ferrite nanoparticles DOI: 10.1016/j.ceramint.2020.09.220 -
Phosphate (PO4) confiance 1,0
“The peaks at 433 cm-1 and 447 cm-1 were assigned to PO43υ2 vibration (bending mode), and the peaks at 1030 cm-1, 1047 cm-1 and 1079 cm-1 (arb.”
Gavinho 等 - 2023 - An Eco-Friendly Process to Extract Hydroxyapatite DOI: 10.3390/jfb14050279 -
confiance 1,0
“bands around 447-558 is attributed to Cu-N Scanning electron microscopy (SeM).”
Ghoniem 等 - 2020 - Statistical modeling-approach for optimization of DOI: 10.1038/s41598-020-66101-x -
Protein confiance 1,0
“Green AgNPs were previously synthesized using 2,341.94, 1,653.18, 1,521.43, and 668.58 A high absorptionpeakat3,446.64cm-1 correspondedtoN-H(protein) sp.”
Biogenic Silver Nanoparticles Synthesized by Lysinibacillus xylanilyticus MAHUQ-40 to Control Antibiotic-Resistant Human Pathogens Vibrio parahaemolyticus and Salmonella Typhimurium DOI: 10.3389/fbioe.2020.597502 -
confiance 1,0
“447 cm-1 Along with the stretching vibrations of Si-O, the 872 band at a position similar 448”
Ruan 等 - 2020 - Improvement of the performance and microstructural DOI: 10.1016/j.conbuildmat.2020.120017) -
Amide confiance 1,0
“The presence of BSA within the sample is cm-1, 447 confirmed by the C-N stretch present at 1231 as has previously been seen for other 448 liposomal preparations (Hui & Huang, 2021).”
Weaver 等 - 2022 - Microfluidic-mediated self-assembly of phospholipi DOI: 10.1016/j.ijpharm.2021.121347
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