What absorbs at 464 cm⁻¹ in an FTIR spectrum?
A band near 464 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 464 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 | 4 | 4 | 1,0 |
| Silicon-oxygen (Si-O) | 4 | 4 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Silicon silicon | 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 |
|---|---|---|---|
| Silicate | 464, 1000, 1037 | Silicon-oxygen (Si-O), Silicon (Si), Metal oxygen | 1 |
| kaolinite | 464, 3696, 693 | Silicon-oxygen (Si-O), Silicon (Si), Siloxane (Si-O-Si) | 1 |
| quartz | 464, 800, 3053 | Silicon-oxygen (Si-O), Silicon (Si), Siloxane (Si-O-Si) | 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 464 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
“Since in GaAs the 464 cm-1 peak corresponds to the longitudinal stretching mode of the pair [5] one can imagine that when Al atoms substitute Ga atoms nearest to the SiAs cation sites the Si-Si bond will become somewhat weaker due to an Al-”
Kaczor 等 - 1995 - Silicon-related local vibrational mode absorption DOI: 10.4028/www.scientific.net/MSF.196-201.1091 -
Metal oxygen confiance 1,0
“FTIR vibrational cm-1 bonds between 464 and 585 confirm the interaction of metal-oxygen at tetrahedral and octahedral sites, a de-notified vibrations stretch.”
Influence of Mn dopant on the crystallite size, optical and magnetic behaviour of CoFe2O4 magnetic nanoparticles DOI: 10.1016/j.jpcs.2020.109654 -
confiance 1,0
“Vibrational peaks at 464 and 1089 in the IR spectrum of fly ash might have resulted from bending and asymmetric stretching of Si-O, Aerosol and Air Quality Research | https://aaqr.org”
Micro-characterization of Dust and Materials of Dust Origin at a Cement Industry Located in Bangladesh DOI: 10.4209/aaqr.220109 -
Silicon-oxygen (Si-O) confiance 1,0
“[144] reported a quartz peak at 464 cm-1 and a cristobalite peak at 410 µm 1 with micrometer-scale characterization, thereby improving the detection limit.”
Review of Filters for Air Sampling and Chemical Analysis in Mining Workplaces DOI: 10.3390/min12101314 -
Alkyl C-H confiance 1,0
“FTIR-ATR analysis of enzyme-modified gallate462 family-compounds also revealed that their alkyl chain was unaltered upon enzymatic 463 modification, while major changes were observed in the peaks of their phenolic 464 moieties.”
Cusola 等 - 2020 - Elucidating the chemical nature of laccase-modifie DOI: 10.1080/02773813.2020.1772823 -
Silicon (Si) confiance 1,0
“cm-1, The FTIR spectrum of the geopolymer pastes showed a band around 464 ascm-1 The FTIR spectrum of the geopolymer pastes showed a band around 464 cm-1, ascribed to the Si-O vibration.”
Sodium Silicate from Rice Husk Ash and Their Effects as Geopolymer Cement DOI: 10.3390/polym14142920 -
confiance 1,0
“The bending or stretching of T-O-T (T= Si or Al) bridges of cm-1 434 aluminosilicates is assigned to the band at 464 [38].”
Istuque 等 - 2019 - Effect of sewage sludge ash on mechanical and micr DOI: 10.1016/j.conbuildmat.2019.01.093 -
confiance 1,0
“Ti4+ 2p 2p the two strong peaks Ti (464.31 eV) and Ti (458.53 eV) are assigned to (TiO [27] and 1/2 3/2 2 Ti-OH) and the two peaks (457.01 and 462.44 eV) are attributed to Ti 2O [31].”
Deposition of TiO2 Thin Films on Wood Substrate by an Air Atmospheric Pressure Plasma Jet DOI: 10.3390/coatings9070441
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