What absorbs at 2359 cm⁻¹ in an FTIR spectrum?
A band near 2359 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 7 cited sources
Réponse rapide
A band near 2359 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 |
|---|---|---|---|
| Carbon dioxide | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 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 |
| Thiol | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 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 |
|---|---|---|---|
| nanotubes | 2359, 1735, 1630 | Alkyl C-H, Methacrylate, 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 2359 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
“The band at 2359 was due to the C-H stretching dye by PP-ZnONFs were shown in Fig.”
Synthesis of photocatalytic zinc oxide nanoflowers using Peltophorum pterocarpum pod extract and their characterization DOI: 10.1007/s13204-021-01919-z -
Carbon dioxide confiance 1,0
“LLM confirmed rule peak-group candidate”
Fedorkova 等 - 2018 - Synthesis and Characterization of Porous SulfurMW DOI: 10.20964/2018.01.67 -
Alkyl C-H confiance 1,0
“5 cm(cid:1)1 -C-H -Sresponding to stretching vibration, 2359 for cm(cid:1)1 cm(cid:1)1 -SO stretch, 1236 and 1103 for the 3H of the SPSF”
Fabricating PES/SPSF membrane via reverse thermally induced phase separation (RTIPS) process to enhance permeability and hydrophilicity DOI: 10.1039/c9ra05707b -
Carboxyl (COOH) confiance 1,0
“LLM confirmed rule peak-group candidate”
Pitchai 等 - 2014 - Study on the improvement of hydrophilic character DOI: 10.2478/pjct-2014-0064 -
Carbon dioxide confiance 1,0
“Bands cm-1 cm-1 at 2359 (due to adsorbed CO 2), at 2322 (CH 3CN adsorbed on very cm-1 cm-1 strong Lewis acid sites), at 2218 (Ti - NCO) and at 2117 (CN (a))”
Adsorption of acetonitrile and its reaction with oxygen on TiO<Subscript>2</Subscript>-supported Au — Rh bimetallic catalysts DOI: 10.1007/s11144-007-5120-6 -
C-S single bond confiance 1,0
“caused an adsorption band around in C-S-H gel, time (min) time (min) 2359cm-1 and the peaks around 1488 and are related to”
Yousefi 等 - 2021 - Fabrication and Characterization of a Nanofast Cem DOI: 10.1155/2021/7343147 -
Acetate confiance 1,0
“of the cm-1 Vibration Peak position, vibration assignments Hydrogen chloride H-Cl asymmetric stretching 3150-2600 Saturated hydrocarbon C-H stretching 2935 Plasticizer (ester group) C-O-C symmetric stretching 1120 C-O-C asymmetric stretchin”
Zhao 等 - 2022 - Experimental investigation and numerical modeling DOI: 10.1007/s10973-022-11723-8
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