What absorbs at 1348 cm⁻¹ in an FTIR spectrum?
A band near 1348 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 1348 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 |
|---|---|---|---|
| N-O bond | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Nitro (NO2) | 1 | 1 | 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 |
| Alkyl C-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 |
|---|---|---|---|
| activated carbon | 1348, 1575, 1210 | Hydroxyl (O-H), Carboxyl (COOH) | 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 1348 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
-
Alkyl C-H confiance 1,0
“Component loadings indicate that POM has a tendency for higher absorbance than the cm-1, silt at the broad peak around 1348 that indicates aliphatics and phenolics.”
Calderon 等 - 2011 - Chemical Differences in Soil Organic Matter Fracti DOI: 10.2136/sssaj2009.0375 -
N-O bond confiance 1,0
“The metastable solid phase transition from the initial solid to a metastable solid phase of NaNO (cid:3)87% (cid:3)96% deliquesced completely in the region from to RH according to the fact that the (cid:2) 3cm-1 3-NO band showed two overlap”
Lu 等 - 2008 - Molecular events in deliquescence and efflorescenc DOI: 10.1063/1.2973623(cid:5) -
confiance 1,0
“Not identified by CR isotope labeling of the of lysine, but was assigned to a related mode cm-1 with the 1348 band of BR.”
Maeda 等 - 1999 - Chromophore-protein-water interactions in the L in DOI: 10.1021/bi9907072 -
Protein confiance 1,0
“Stained sections were 1348cm1 and associated with collagen as well as the peak at”
Maribel Mata-Miranda 等 - 2019 - Characterization of the Biological Fingerprint and DOI: 10.1155/2019/1241452 -
Amide confiance 1,0
“0.0001 1452.136 1451.171 8 3 str 0.506 1401.995 9 1401.995 -COOC=O of 0.036 1345.106 10 Carboxyl groups COO and asymmetric C-N stretching 1347.998 3-)”
Martinez-Cuazitl 等 - 2023 - Clinical, Biochemical, and ATR-FTIR Spectroscopic DOI: 10.1155/2023/3423183 -
confiance 1,0
“Explicit assignment: 'characteristic peaks at ~1348 cm-1 (D band)'.”
Effect of Iron Loading on the Catalytic Activity of Fe/N-Doped Reduced Graphene Oxide Catalysts via Irradiation DOI: 10.3390/app11010205 -
N-O bond confiance 1,0
“The band experienced at 1348 can be attributed adsorption capacity of activated carbon for the adsorption to the N - O symmetric stretch in the nitro compounds.”
Rutto 等 - 2019 - Adsorption of lead ions onto chemically activated DOI: 10.24425/aep.2019.130245 -
Hydroxyl (O-H) confiance 1,0
“[37] found that the ATR-FTIR spectra of 2O 3-adsorbed 1617 cm-1, 1458 cm-1, and 436 cm-1, respectively, indicating that Fe-O, CH3/COO and -OH in HFO cm-1 humic acid showed two new bands at 1348 and 1470 during the initial time points, which”
Removal of Tetracycline by Hydrous Ferric Oxide: Adsorption Kinetics, Isotherms, and Mechanism DOI: 10.3390/ijerph16224580
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