What absorbs at 3316 cm⁻¹ in an FTIR spectrum?

Réponse rapide

A band near 3316 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

Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.

Matériaux possibles

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 3316 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

  “cm-1 cm-1 and remaining OH groups at 3316 The C-H stretches was observed at 2926 and 2854 cm-1, cm-1 cm-1 followed by peaks at 1511 1213 and 1068 which indicates the urethane linkages of N-”

  Norshahli 等 - 2018 - Mechanical Properties of Palm Oil Polyol based Pol DOI: 10.1088/1742-6596/1082/1/012041
• confiance 1,0

  “The peak at 3316 cm-1 (observed in mushrooms produced in WS, cm-1 3313 and 3301 for GM and OL, respectively) can be attributed to the N-H stretching vibration and shifted to 3313 and 3301 cm-1 for GM and OL, respectively) can be attributed”

  Pleurotus Mushrooms Content in Glucans and Ergosterol Assessed by ATR-FTIR Spectroscopy and Multivariate Analysis DOI: 10.3390/foods9040535
• confiance 1,0

  “The stretching vibrations of N-H in the Fermi resonance, which ocapproximately 3316 The stretching vibrations of N-H in the Fermi resonance, which curred at around 2932 cm-1, formed amide B bands.”

  Functionalised Hybrid Collagen-Elastin for Acellular Cutaneous Substitute Applications DOI: 10.3390/polym15081929
• Hydroxyl (O-H) confiance 1,0

  “(cm-1) Wavenumbers Assignment 3316 O-H stretching vibration 2900”

  Incorporation of In Situ Synthesized Nano-Copper Modified Phenol-Formaldehyde Resin to Improve the Mechanical Properties of Chinese Fir: A Preliminary Study DOI: 10.3390/polym13060876
• Hydroxyl (O-H) confiance 1,0

  “For all samples, peaks between 3289 cm-1 and 3316 cm-1 were observed, which relate to the stretching of hydroxyl (OH) groups due to the formation of hydrogen bonds [50].”

  Encapsulation of Concentrated Solution Obtained by Block Freeze Concentration in Calcium Alginate and Corn Starch Calcium Alginate Hydrogel Beads DOI: 10.3390/gels9050374
• confiance 1,0

  “1256 C-N stretching of aromatic amine 5 714 C-Cl stretching cm-1 As can be seen in Figure 8, the spectra exhibited a distinctive peak at 3316 due”

  Preparation and Physicochemical Characterization of a Diclofenac Sodium-Dual Layer Polyvinyl Alcohol Patch DOI: 10.3390/polym13152459
• Hydroxyl (O-H) confiance 1,0

  “Characteristic peaks were found at 1631.40 and 3316.43 The vibrational band at cm-1 3316.43 indicated O-H stretching due to the involvement of phenol or alcohol as a cm-1 functional group, whereas the stretching band at 1631.40 represented”

  Development of Iron Nanoparticles (FeNPs) Using Biomass of Enterobacter: Its Characterization, Antimicrobial, Anti-Alzheimer’s, and Enzyme Inhibition Potential DOI: 10.3390/mi13081259
• N h confiance 1,0

  “The BZ structure (signals at 1222 and 948 cm-1) remained for the uncured Por-BZ/Ni and cm-1 Meanwhile, the signal at 3316 for NH stretching of the pyrrole ring had disappeared, Por-BZ/Zn complexes.”

  Zhang 等 - 2022 - Metal Complexes of the Porphyrin-Functionalized Po DOI: 10.3390/polym14030449