What absorbs at 1493 cm⁻¹ in an FTIR spectrum?

Schnelle Antwort

A band near 1493 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.

Mögliche Funktionsgruppenzuweisungen

Das Ranking spiegelt die gesammelte Literatur Evidenz wider, nicht eine einzelne maßgebliche Regel. Bestätigen Sie immer anhand Ihres Probenkontexts.

Mögliche Materialien

Materialien werden nur angezeigt, wenn derselbe Literaturpool diese Bande und mindestens einen weiteren charakteristischen Peak unterstützt.

Spektrumslogik

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 1493 cm⁻¹ is usually not enough for material identification by itself.

Praktische Anwendung

Diese Art von Abfrage ist üblich bei der Polymeridentifikation, dem Screening unbekannter Kunststoffe, der Fehlersuche in der Qualitätskontrolle, der Verifizierung von Recyclingmaterial und der literaturgestützten Überprüfung der Peakzuordnung.

Häufige Fehler

• Behandlung einer isolierten Bande als Beweis für ein Material, ohne mindestens einen oder zwei unterstützende Peaks zu überprüfen.
• Überlappung ignorieren: Mehrere funktionelle Gruppen können nahe der gleichen Wellenzahl beitragen.
• Überspringen der Validierung, wenn Additive, Mischungen, Oxidation oder Verunreinigungen das Spektrum verfälschen können.

Beratung zur Verifizierung

Wenn weiterhin Mehrdeutigkeit besteht, validieren Sie die Hypothese mit DSC, GC-MS oder TGA, insbesondere bei Mischungen, degradierten Proben und gefüllten Polymeren.

Literatur hinter diesen Zuweisungen

• Aromatic ring Vertrauen 1,0

  “2 cm-1, 1493cm-1 and 2851 the aromatic ring vibrations at 1602 and cm-1 and the lines due to the CH deformation vibrations at 1452 2 (Kondyurin et al., 2008;”

  60MeV Ni ion induced modifications in nano-CdS/polystyrene composite films DOI: 10.1016/j.radphyschem.2013.06.022
• C c single bond Vertrauen 1,0

  “cm(cid:1)1 (cid:2) ABSTRACT: Polymer blend usage has increased in recent matic C C stretch for PS at 1493 were ratioed.”

  Use of Fourier transform infrared and second derivative ultraviolet spectrometry in determining polystyrene-poly(4-vinylpyridine) blend composition DOI: 10.1002/app.22427
• Alkene (C=C) Vertrauen 1,0

  “The characteristic bands 3, 4 and 5, at 1537, 1493 cm-1, C=C and 1455 respectively, are attributed to asymmetric and symmetric stretching of in the aromatic ring cm-1, S=O skeleton.”

  Biodegradation of Vulcanized SBR: A Comparison between Bacillus subtilis, Pseudomonas aeruginosa and Streptomyces sp DOI: 10.1038/s41598-019-55530-y
• Aromatic ring Vertrauen 1,0

  “LLM confirmed rule peak-group candidate”

  Investigation of the binding of dioxin selective pentapeptides to a polyaniline matrix DOI: 10.1016/j.synthmet.2012.04.012.
• Amide Vertrauen 1,0

  “In the high temperature 1100 and 1211 belonged to cm(cid:3)1 This interval, it can be found that the peak at 1493 monodentatenitrate,continuoussecondarynitrateandbridged belongs to cm(cid:3)1 cm(cid:3)1 amide(-NH respectively,48,51 nitrate”

  Study on the mechanism of synthetic (Ce,La)CO3F sulfuric acid acidification and NH3-SCR loaded with Mn and Fe DOI: 10.1039/d1ra02788c
• Ring structure Vertrauen 1,0

  “cm-1 modes were observed at 1601, 1582, 1506, and 1493 for all four layers, probably due to the cm-1 presence of a phthalic group in the alkyd resins [21,45,46], where a peak pair at 1601 and 1493 cm-1 were assigned to the mono or ortho-sub”

  Multi-Modal Compositional Analysis of Layered Paint Chips of Automobiles by the Combined Application of ATR-FTIR Imaging, Raman Microspectrometry, and SEM/EDX DOI: 10.3390/molecules24071381
• Aromatic ring Vertrauen 1,0

  “aromatic and aliphatic stretching cm-1 cm-1, vibrations are assigned to 1493 and 826 respectively [57].”

  Selbmann 等 - 2022 - Impact of Non-Accelerated Aging on the Properties DOI: 10.3390/polym14235246
• Alkene (C=C) Vertrauen 1,0

  “cm-1, at 684 C-H bending at 744 C-H bending at 818 C-H bending at 872 C-N cm-1, cm-1, stretching aromatic amine at 1261 C-C stretching aromatic ring at 1493 C=C stretching cm-1, cm-1.”

  Synthesis of a Polyaniline Nanoparticle Using a Solution Plasma Process with an Ar Gas Bubble Channel DOI: 10.3390/polym11010105