What absorbs at 1561 cm⁻¹ in an FTIR spectrum?

Schnelle Antwort

A band near 1561 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 1561 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

• Hydroxyl (O-H) Vertrauen 1,0

  “Moreover, the new absorption peaks at 1372, 1508, 1561 cm-1 nium hydroxide (100 ml) was placed into a 250 ml round bottom and 1692 representing the C N stretching, C C stretching of flask, and then 4.0 g of tetraethoxyorthosilane (TEOS) was”

  Stopband attenuation of silica spheres by attaching aniline and polyaniline DOI: 10.1016/j.synthmet.2013.03.007
• Amide Vertrauen 1,0

  “110 × 100, = Index(CI%) (5) Crystallinity responsible for aliphatic CH stretching whereas the band 𝐼 1561cm-1 110 at was attributed to amide stretching of C=O.”

  Anusha 和 Fleming - 2016 - Synthesis and Characterization of Chitosan Nanoagg DOI: 10.1155/2016/5379424
• Alkene (C=C) Vertrauen 1,0

  “In the FTIR spectrum of rGO-TEPA, few representative peaks were identified at 1654, In the FTIR spectrum of rGO-TEPA, few representative peaks were identified at 1654, 1561, 1443, and 1186 cm-1, which can be attributed to the C=C stretching”

  Cojocaru 等 - 2022 - Electrospun Nanofibrous Membranes Based on Citric DOI: 10.3390/polym14020294
• N h Vertrauen 1,0

  “assigned the band at 1561 for aminopropyltrimethoxisilane SAM Chiang [32] deposited on silica gel to NH deformation modes with strong hydrogen bonding.”

  Growth and organization of (3-Trimethoxysilylpropyl) diethylenetriamine within reactive amino-terminated self-assembled monolayer on silica DOI: 10.1016/S0079-6816(00)00024-1.
• Vertrauen 1,0

  “The most important element was the cm-1 increase in the intensity of peaks in the range of 3400-3200 wavenumbers, typical for cm-1, the presence of N-H bonds, and the increase in the absorption bands at 1561 and 1519 confirming the increase”

  Optimization of Glutathione Adhesion Process to Modified Graphene Surfaces DOI: 10.3390/nano11030756
• Ester Vertrauen 1,0

  “ν(C=O) A (at 1561 and 1410 The ester band in curve (split into two components, cm-1) at 1737 and 1728 is also very weak.”

  Fourier Transform Infrared (FTIR) Spectroscopic Analyses of Microbiological Samples and Biogenic Selenium Nanoparticles of Microbial Origin: Sample Preparation Effects DOI: 10.3390/molecules
• Amide Vertrauen 1,0

  “The remarkable findings of this cm-1 cm-1 band at 1638 - 1561 amide II band at 1561 and study have been proven to be practically important in the cm-1.”

  Koutb 等 - 2021 - Paclitaxel production by endophytic fungus, Neopes DOI: 10.30955/gnj.003839
• Amide Vertrauen 1,0

  “spectrumsindicatehigherphospholipidcontent.Intheinterval Typical gluten bands are Amide I (80 % C-O stretch, 10 % cm-1 cm-1, 3100-2750 C-N stretch) at 1654 Amide II (60 % N-H bend, 30 % bands originating from stretch vibrations of C-Nstretc”

  Pourfarzad 等 - 2015 - Serish inulin and wheat biopolymers interactions i DOI: 10.1007/s13197-015-1939-4