What absorbs at 1194 cm⁻¹ in an FTIR spectrum?
A band near 1194 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 1194 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 |
|---|---|---|---|
| Methoxy (OCH3) | 4 | 4 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 1 | 1,0 |
| N-O bond | 2 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 0 | 0,9 |
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 |
|---|---|---|---|
| PVA | 1194, 1660, 2930 | Acetate, Methacrylate, C-O single bond | 1 |
| polyester | 1194, 1700, 1250 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| biodiesel | 1194, 858, 3470 | Methacrylate, Acetate, Methoxy (OCH3) | 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 1194 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
-
N-O bond confiance 1,0
“28 cm(cid:1)1 OMO-100, the peak at 1194 represents the stretching of licensed on Specication Sl no.”
Evaluation of the performance and emission and spectroscopic analysis of an improved soy methyl ester DOI: 10.1039/c9ra04342j -
Acetate confiance 1,0
“In this spectrum, the sharp peak at 1194.43 is assigned to C-O-B stretching vibration, which confirmed the formation of crosslinking of PVA with BA [49, 50].”
Sprayed in-situ synthesis of Polyvinyl alcohol/Chitosan loaded Silver nanocomposite hydrogel for improved antibacterial effects DOI: 10.1016/j.ijbiomac.2019.09.186 -
Acetate confiance 1,0
“FTIR spectroscopy peak absorbance in 1732.81 who is the peak absor- @ bance of carbonyl bond (C O) and two peaks absorbance cm(cid:2)1 m The chemical structure of bitumen is complex and bituof stretching vibration (1193.61 for and”
Li 等 - 2008 - The research of GMA-g-LDPE modified Qinhuangdao bi DOI: 10.1016/j.conbuildmat.2007.03.007 -
Phosphate (PO4) confiance 1,0
“0 :2 6 Symmetric stretching vibrations of non-bridging ~ 1194 (Q2) oxygens O-P-O (Q2) ~ 1266 Symmetric stretching vibrations of P=O (Q2) ~ 1388 Asymmetric stretching vibrations of P=O”
Andronache 和 Racolta - 2014 - Structural Investigation of MO center dot P2O5 cen DOI: 10.1063/1.4903024 -
Phosphate (PO4) confiance 1,0
“LLM confirmed rule peak-group candidate”
Dai 等 - 2020 - Effects of a Reactive Phosphorus-Sulfur Containing DOI: 10.3390/polym12071441 -
confiance 1,0
“the peaks at cm-1 cm-1 cm-1 1194 and 1163 for aromatic C-N stretching vibrations.”
Unveiling the role of novel biogenic functionalized CuFe hybrid nanocomposites in boosting anticancer, antimicrobial and biosorption activities DOI: 10.1038/s41598-021-87363-z -
Acetate confiance 1,0
“spectra have a C-H bond/wavelength with length ranging from 2800 to 3000 In cm-1 D50::S70:M30, and D50::S80:M20, the peak reported at 1194 is due to the stretching of O-CH 3, which is a trace of FAME.”
Hasnain 等 - 2023 - Performance, Emission, and Spectroscopic Analysis DOI: 10.3390/su15097415 -
Acetate confiance 1,0
“All three cm-1 cm-1 azo compounds exhibit a specific peak at 1194 (Mono_A) and 1190 (Di_A C-O and Tris_A) corresponding to the band stretching phenol.”
Synthesis, Characterization, DFT Study and Antifungal Activities of Some Novel 2-(Phenyldiazenyl)phenol Based Azo Dyes DOI: 10.3390/ma15228162
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