What absorbs at 1295 cm⁻¹ in an FTIR spectrum?

Schnelle Antwort

A band near 1295 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 1295 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

• Acetate Vertrauen 1,0

  “Again, it is reported that for C-H scissoring and bending coming from glycerol cm-1 cholesterol has a spatial helicoidal structure and it confor C-O stretching and peaks at 1295, 1247 and 1195 tains a double bond in the second cyclohexane r”

  Jana 等 - 2009 - Molecular Orientation of Polyurethane Based Liquid DOI: 10.1080/10601320903158719
• Amide Vertrauen 1,0

  “The peaks at 1295 and are assigned to the C-N stretching mode of the benzenoid rings that of conducting protonated from PANI[10].”

  Synthesis and characterization thin films of conductive polymer (PANI) for optoelectronic device application DOI: 10.1063/1.4948838
• Nitrate Vertrauen 1,0

  “The peak at 1172 which cm-1 peaks at 1215 and 1295 are assigned to monodentate corresponds to the low-frequency component of the split band nitrates, and the particular monodentate nitrate peak at 1295 resulting from s(NH 3) coordinated to”

  Pena 等 - 2004 - Identification of surface species on titania-suppo DOI: 10.1021/jp0313122
• Acetate Vertrauen 1,0

  “deformation DGBEA1%ZnO-APTES-DGBEA3%ZnO-APTES-DGBEA5%ZnO-APTES-DGBEA7%ZnO-APTES-DGBEATentativefrequencyassignment 630(vw)638(vw)632(w)638(w)628(w)C-O-Obonding(aromatics) symmetricstretching bendingvibration 1295(w)1295(m)1295(m)1289(vw)1291”

  Investigation of the Thermal and Dielectric Behavior of Epoxy Nano-Hybrids by using Silane Modified Nano-ZnO DOI: 10.1007/s12633-017-9604-3
• Acetate Vertrauen 1,0

  “cm-1) bending vibration (assigned to 1580 when increasing the plasma exposure time, bending vibration (assigned to 1580 cm-1) when increasing the plasma exposure time, cm-1) while significant increase in C-O-C stretching bands (1295, 1245,”

  Plasma-Induced Graft Polymerization of Polyethylenimine onto Chitosan/Polycaprolactone Composite Membrane for Heavy Metal Pollutants Treatment in Industrial Wastewater DOI: 10.3390/coatings12121966
• Amide Vertrauen 1,0

  “2b) aresharper than Published cm(cid:1)1 C-N rings, while the bands at 1295 is correspond to that of the CdS/PANI (Fig.”

  A novel composite of CdS nanorods growing on a polyaniline-Cd2+ particles surface with excellent formaldehyde gas sensing properties at low temperature DOI: 10.1039/c8ra05082a
• Alkyl C-H Vertrauen 1,0

  “cm-1 Similarly, the peak observed at 1295 (i in the Figure 3) in the PEO spectrum is assigned to asymmetric CH torsion [29].”

  Composite Polymer Electrolytes Based on (PEO)4CF3COOLi and Multi-Walled Carbon Nanotube (MWCNT) DOI: 10.3390/polym15010049
• Hydroxyl (O-H) Vertrauen 1,0

  “One cm-1, of these peaks, seen at 1295 represents the in-plane bending vibration of the -OH”

  The Influence of Emulsifiers on the Physiochemical Behavior of Soy Wax/Rice Bran Oil-Based Oleogels and Their Application in Nutraceutical Delivery DOI: 10.3390/gels9010047