What absorbs at 455 cm⁻¹ in an FTIR spectrum?
A band near 455 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 455 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 | 6 | 6 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Carbon dioxide | 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 |
|---|---|---|---|
| TiO2 | 455, 1700, 1093 | Metal oxygen, Hydroxyl (O-H) | 1 |
| TiO2 nanoparticles | 455, 1700, 1535 | Hydroxyl (O-H), Metal oxygen | 1 |
| silica | 455, 1100, 1080 | Silicon-oxygen (Si-O), Hydroxyl (O-H), 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 455 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
“2 30 eV.36 to give rise to a peak at 455 A significant band ascribed to a Ti-O-C bond was observed at 31 32”
Surface Grafting of Ru(II) Diazonium-Based Sensitizers on Metal Oxides Enhances Alkaline Stability for Solar Energy Conversion DOI: 10.1021/acsami.7b16641 -
Metal oxygen confiance 1,0
“assigned to apical oxygen vibrations”
Khan 等 - 2004 - Effects of post-annealing on the infrared active p DOI: 10.1016/j.physc.2004.04.029 -
confiance 1,0
“The disordered natureof the rutile lattice and the signalwith ag value of 1.98 inthe ESR spectrum of SnO fluoride enormous oxygen vacancies created due to ion doping were evident from the broad bands observed at 455, 588, and cm(cid:1)1”
Kumar 等 - 2011 - Optical and Photocatalytic Properties of Heavily F DOI: 10.1021/ic2003436 -
Silicon-oxygen (Si-O) confiance 1,0
“The pumice XRD pattern coated with and ZrO nanoparticles shows the main and derivative elements of TiO 2 2 pumice, including pyroxene, magnetite feldspar mica, and SiO 2.FTIR spectra for TiO and ZrO nanoparticles showed that the peaks at 45”
Efficiency of the catalytic ozonation processes using nanoparticles deposited on pumice in the remov DOI: 10.1080/03067319.2021.1903453 -
Metal oxygen confiance 1,0
“LLM confirmed rule peak-group candidate”
Wang 等 - 2018 - Coloration and Decoloration of Textiles Using a Ti DOI: 10.1007/s12221-018-1134-0 -
Hydroxyl (O-H) confiance 1,0
“Fritsch et al.: OH stretching vibrations in serpentines 455 2M 3.2.2 OH stretching modes in antigorite inner OH in an Mg environment.”
Fritsch 等 - 2021 - Structural, textural, and chemical controls on the DOI: 10.5194/ejm-33-447-2021 -
confiance 1,0
“The low frequency contributions (~455 cm-1) (~455 and ~800 are bending modes of the Si-O bonds, whereas the high-intensity and ~800 cm-1) are bending modes of the Si-O bonds, whereas the high-intensity band at and ~800 cm-1) are bending mod”
Len 等 - 2021 - Physicochemical Characterization and Drug Release DOI: 10.3390/ijms22179197 -
Metal oxygen confiance 1,0
“4 cm-1 widening in the 1150-1000 region due to overlapping of stretching vibrations of spectively), 576 cm-1 (vibrations of double-ring external linkage), and 455 cm-1 (bending functional Si/Al-O and stretching vibrations of C-C/C-O-C pecti”
Novel Biocomposite Films Based on High Methoxyl Pectin Reinforced with Zeolite Y for Food Packaging Applications DOI: 10.3390/foods11030360
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