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

Quick answer

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.

Möjliga identifieringar av funktionella grupper

Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.

Possible materials

Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.

Spectrum logic

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.

Real-world usage

This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.

Common mistakes

• Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
• Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
• Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.

Verification advice

When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.

Litteratur bakom dessa identifieringar

• Acetate förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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 förtroende 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) förtroende 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