What absorbs at 1153 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1153 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 1153 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

• Carboxyl (COOH) confidence 1.0

  “Both PU and PTR 1742cm(cid:3)1 1168cm(cid:3)1 cm(cid:3)1 cm(cid:3)1 acid at and which could be clearly observed showed a peak at 1153 which was about 13 different 1742cm(cid:3)1 in OL but not in others.”

  Differential identification of mushrooms sclerotia by IR macro-fingerprint method DOI: 10.1016/j.saa.2015.07.054
• Silicon-oxygen (Si-O) confidence 1.0

  “1153cm-1 950cm-1 effects and corresponding to main absorption bands of quartz (Figs.”

  FTIR photoacoustic spectroscopy for identification and assessment of soil components_ Chernozems and their size fractions DOI: 10.1016/j.pacs.2020.100162
• C-O single bond confidence 1.0

  “The peaks displayed at around 1153 cm-1 β and 1082 were attributed to the (1-4) glycosidic bond in the polysaccharide unit and the stretching vibrations of C-O-C in the glucose ring, respectively.”

  Antimicrobial Activity of Chemically and Biologically Treated Chitosan Prepared from Black Soldier Fly (Hermetia illucens) Pupal Shell Waste DOI: 10.3390/microorganisms9122417
• C c single bond confidence 1.0

  “The 1153 band is ascribed to C-C ring asymmetric stretching cm-1 bands are due to C-O-C glycosidic link vibrations while the 1121 and 1094”

  Adebajo 等 - 2006 - Raman spectroscopic investigation of acetylation o DOI: 10.1016/j.saa.2005.07.045
• Acetate confidence 1.0

  “The dotted blue lines crossing the peak at ~1153 is for asymmetric cm-1 stretch of C-O-C, and that at 1298 is for the C-N stretching vibration of type I amine.”

  Awadallah-F 和 Al-Muhtaseb - 2019 - Influence of Chitosan Addition on Resorcinol-Forma DOI: 10.3390/app9214582
• Acetate confidence 1.0

  “The local peak at 1153 was assigned mostly to C-O-C asymmetric stretch vibrations, which are characteristic of various cell wall cm-1 polysaccharides and therefore are not distinctive.”

  Bednarek 等 - 2020 - Exploring the Biochemical Origin of DNA Sequence V DOI: 10.3390/ijms21165770
• Acetate confidence 1.0

  “Furthermore, all curves showed absorption peaks at 1153 cm-1, attributed to the asymmetric stretch vibration of the bridge bond C-O-C.”

  Pullulan Oxidation in the Presence of Hydrogen Peroxide and N-Hydroxyphthalimide DOI: 10.3390/ma15176086
• C c single bond confidence 1.0

  “Bands located from 920 cm-1 to 1153 cm-1 are associated with vibrations of C-C and C-O-H stretching and the bending mode of C-H bonds typical of vibrations of C-C and C-O-H stretching and the bending mode of C-H bonds typical of vibrations”

  Physical-Mechanical Behavior and Water-Barrier Properties of Biopolymers-Clay Nanocomposites DOI: 10.3390/molecules26216734