What absorbs at 1310 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1310 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.

Possible functional-group assignments

Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.

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 1310 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.

Literature behind these assignments

• Aromatic ring confidence 1.0

  “The notable weak cm-1 vibration bands at 1310 and 1184 are due to the aromatic and aliphatic C-N stretching cm-1, vibrations of PPy.”

  Highly Biological Active Antibiofilm, Anticancer and Osteoblast Adhesion Efficacy from MWCNT/PPy/Pd nanocomposite DOI: 10.1016/j.apsusc.2017.10.142
• Thiocarbonyl confidence 1.0

  “Two bands at 1310 and ν(C are assigned to thiocarbonyl S) stretching and bending 3.2.”

  Chikate 和 Padhye - 2007 - Transition metal quinone-thiosemicarbazone complex DOI: 10.1016/j.saa.2006.05.017
• Carbonate confidence 1.0

  “ı(OH)=1225cm-1][12].Additionally,twoweakbandsat1578and 1310cm-1 corresponding to bidentate carbonate surface groups 3=) (b-CO [12] may also be observed.”

  Effect of gallia doping on the acid⠍base and redox properties of ceria DOI: 10.1016/j.apcata.2010.08.050
• Amide confidence 1.0

  “At lower wavenumber, the bands at 1310 and 1283 are assigned to helices and ß-sheet of amide III band owing to in-phase combination of CH stretching and NH cmbending vibrations [42].”

  Gupta 等 - 2022 - In vitro cell composition identification of wood d DOI: 10.1098/rsos.201935
• confidence 1.0

  “and the absorbance peak at 1310 was due to vibration of Ti-O-C Therefore, a conclusion can be drawn that the anatase TiO can be obtained via pyrolysis in 2 good agreement with the XRD and SEM results.”

  The preparation and characterization of the Ni-NiO/TiO2 hollow composite materials on micro-nano cellulose fibers DOI: 10.1016/j.vacuum.2018.06.044
• Amide confidence 1.0

  “The NH group has 2 1310cm-1 present work, the C-N stretching is observed at which two vibrations;”

  Vibrational spectroscopy [FTIR and FTRaman] investigation, computed vibrational frequency analysis and IR intensity and Raman activity peak resemblance analysis on 4-chloro 2-methylaniline using HF and DFT [LSDA, B3LYP and B3PW91] calculations DOI: 10.1016/j.saa.2010.12.068
• Alkyl C-H confidence 1.0

  “1383 1388 1389 CH bending+ 1364 1372 1372 O=S=O asymmetric stretching 1310 1330 1330 - CH bending 1261 1270 PLspectraof8HqS(a),8HqS-Al-mag(b),8HqS-Ca-mag(c),8HqS-Zn-mag(d)and Fig.8.”

  Intercalation and in situ formation of coordination compounds with ligand 8-hydroxyquinoline-5-sulfonic acid in the interlayer space of layered silicate magadiite by solid-solid reactions DOI: 10.1016/j.micromeso.2018.02.038
• Alkyl C-H confidence 1.0

  “and CH2 wagging at were important in the predicbondwasimportantbasedonloadingsat1380,1280,and CH2 1310cm-1 tionofcellulose.TheC-O-Casymmetricstretching,assigned .Hemicelluloseyielded-CH2,CH,andOHbending 1160cm-1”

  Zhou 等 - 2015 - Multivariate Calibration and Model Integrity for W DOI: 10.1155/2015/429846