What absorbs at 1299 cm⁻¹ in an FTIR spectrum?
A band near 1299 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 1299 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 |
|---|---|---|---|
| Secondary amine | 5 | 4 | 1,0 |
| C n single bond | 5 | 4 | 1,0 |
| Amide | 5 | 4 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Borate | 1 | 1 | 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 |
| C=n | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 0 | 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 |
|---|---|---|---|
| polyvinyl alcohol | 1299, 1141, 1640 | Amide | 1 |
| titanium dioxide | 1299, 1716, 1724 | Amide | 1 |
| bio-based | 1299, 1720, 1740 | Amide | 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 1299 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
-
Amide confiance 1,0
“The vibrational bands at 1299 1234 cm-1 20 π-delocalized and 1112 have been assigned to the protonation level of PANI-ES due to the AC C-N+ 21 electrons and interpreted as a stretching vibration of the polaron structure, and to the”
Multimorphologies of Hydrochloride Polyaniline Synthesized by Conventional and Interfacial Polymerization DOI: 10.1016/j.molstruc.2017.04.104 -
C c single bond confiance 1,0
“678 265 1477cm-1 and are attributed to C, N and C-C stretching mode of vibration for the quinonoid and 1299cm-1 benzenoid units of polyaniline.”
Rajakani 和 Vedhi - 2013 - Synthesis and electrochemical studies of TiO2 - Pa DOI: 10.4028/www.scientific.net/AMR.678.263 -
C=n confiance 1,0
“deformation of O-H (1351.69 C-N stretching groups, N-H bending groups, C=O stretching groups and O=C=N bending groups (1299.30 cm-1),”
Encapsulation of olive leaf phenolics within electrosprayed whey protein nanoparticles; production and characterization DOI: 10.1016/j.foodhyd.2019.105572 -
Phosphate (PO4) confiance 1,0
“cm-1 homogeneous surface is visible, indicating no sign of phase 4, the bands at 1299 from the stretching vibration cm-1 Differential 2-(PvO)-OH, 2-(P-OH)vO separation.”
Battig 等 - 2019 - Hyperbranched phosphorus flame retardants multifu DOI: 10.1039/c9py00737g -
Acetate confiance 1,0
“cm-1 with N-H bending at 1618 (University of Colorado Oxidative stress effects of zinc oxide nanoparticles on cm-1 2011a), acid with C-O stretching at 1299 (Silverstein fresh water microalga Haematococcus pluivalis.”
Djearamane 等 - 2022 - Sensitivity of Proteus vulgaris to Zinc Oxide Nano DOI: 10.17576/jsm-2022-5105-07 -
Borate confiance 1,0
“The absorption cm-1 cm-1 peaks at 1299 and 1133 were assigned to the stretching vibrations of B-O-C bonds.”
Koysuren - 2018 - Solid-Phase Photocatalytic Degradation of Polyviny DOI: 10.3390/catal8110499 -
Amide confiance 1,0
“The absorption Published cm(cid:3)1 The rheological parameters apparent viscosity (AV), plastic (C-N peak at 1299.30 vibrating band) is assigned to NVP.”
Synthesis and characterization of comb-shaped copolymer as a filtration reducer and comparison with counterparts DOI: 10.1039/c7ra13255g -
Phosphate (PO4) confiance 1,0
“Explicit assignment in text.”
New reactive isoeugenol based phosphate flame retardant: toward green epoxy resins DOI: 10.1021/acssuschemeng.9b02629
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