What absorbs at 3053 cm⁻¹ in an FTIR spectrum?

Réponse rapide

A band near 3053 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 3053 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 h confiance 1,0

  “Absence of ν(NH) band at 3053 cm-1 due to loss of hydrogen”

  Ni-thiosaccharinate complexes: synthesis, characterization and DFT studies. Biological properties as superoxide dismutase mimetics and as anti-carcinogenic agents DOI: 10.1016/j.ica.2019.04.040
• Acetate confiance 1,0

  “Ebastine at 1269 (C-N stretch), 1450 shown in Table 1 ranging from +18.9 mV to + cm-1 (C=C stretch), 1678 (C=O stretch) and 3053 32.6 mV and the PDI values of the prepared cm-1 (C-H stretch) were present in ebastine formulations were found”

  Khom 等 - 2014 - Development of Mucoadhesive Nanoparticulate System DOI: 10.4314/tjpr.v13i7.2
• Alkyl C-H confiance 1,0

  “Although mostly overlapped by the O-H band, the stretching vibration of the C-H bond from the methylene group, as well as from the aromatic rings can still be observed at 2939, 2868 and 3053 cm-1, respectively.”

  Stability and Compatibility Studies of Levothyroxine Sodium in Solid Binary Systems—Instrumental Screening DOI: 10.3390/pharmaceutics12010058
• Acetate confiance 1,0

  “Additionally, IV and C=O bending in proteins (Schmitt bands were present for 3053 (amide B cm-1 a higher intensity of the band correspondand Fleming., 1998).”

  Merma 等 - 2017 - DOI: 10.1590/0370-446720167000063
• confiance 1,0

  “Amide A: peptide, protein N-H stretching 3053 Amide B: peptide, protein N-H stretching 2948”

  Metabolic Profile Characterization of Different Thyroid Nodules Using FTIR Spectroscopy: A Review DOI: 10.3390/metabo12010053
• Alkyl C-H confiance 1,0

  “For acridine (spectrum a), the bands at 3052.6, cm-1 C-H 1400, 731.5 correspond to aromatic stretching vibra-”

  Structural diversity of cocrystals formed from acridine and two isomers of hydroxybenzaldehyde: 3-hydroxybenzaldehyde and 4-hydroxybenzaldehyde DOI: 10.1039/d3ra02300a
• Alkyl C-H confiance 1,0

  “LLM confirmed rule peak-group candidate”

  Spepi 等 - 2016 - Experimental and DFT Characterization of Halloysit DOI: 10.1517/17425247.2016.1169271.