What absorbs at 944 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 944 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 authoritative 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 944 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

• Acetate confidence 1.0

  “The cm-1 peak at 944 observed in the as-burnt BCZT powder with pH 5 was related to C-O-H bending vibration which was in agreement with previous work [13].”

  Influence of pH values on the surface and properties of BCZT nanopowders synthesized via sol-gel auto-combustion method DOI: 10.1016/j.surfcoat.2016.03.091
• confidence 1.0

  “These peaks 943.88 and 968.32 eV correspond to Cu(II) species at the Cu 2O surface [52].”

  Synthesis of CaCO3/Cu2O/GO Nanocomposite Catalysts for Hydrogen Production from NaBH4 Methanolysis DOI: 10.3390/catal13061010
• Carbohydrate confidence 1.0

  “Finally, absorptions at 944 and 841 were assigned to the pyranose ring.”

  Gabriela Chuc-Gamboa 等 - 2021 - Antibacterial Behavior of Chitosan-Sodium Hyaluron DOI: 10.3390/app1103
• confidence 1.0

  “silanol Si-O stretch 944 Si-O-Si symmetric stretch 802 C-H3Asymmetric stretch 2954, 2955, 2961 C-H3Symmetric stretch”

  <32352D382D3032283433322D3433372920C1A4BCF6B1A420C0AFBDBDB1E220C0E5BDBDBED620B9DAC1F8BCBA20B1E8C5C2C7F620C0CCC1A4C8C620B1E8BCF6B9CE2E687770> DOI: 10.6110/KJACR.2013.25.8.432
• Acetate confidence 1.0

  “The peaks saw at 944.5, prepared sample is calculated by using Debye-Scherrer's formula, cm(cid:3)1 C-O C-O 1105.6 and 1569.2 are assigned to aliphatic bending, C¼O film.”

  Effect of Al2O3 on structural and dielectric properties of PVP-CH3COONa based solid polymer electrolyte films for energy storage devices DOI: 10.1016/j.heliyon.2019.e02727
• Alkyl C-H confidence 1.0

  “There are two strong absorption Figure 4c represents the IR spectrum of cationic sago starch at the optimum condition with DS bands at 944 cm-1 and 1081 cm-1 corresponded to an alkyl halide, C-Cl and C-O stretching, 1.195.”

  Preparation and Optimization of Water-Soluble Cationic Sago Starch with a High Degree of Substitution Using Response Surface Methodology DOI: 10.3390/polym12112614
• Alkyl C-H confidence 1.0

  “cm-1-C-O and C-C stretching vibration, 1103-1020 cm-1--CH2 bending vibration, 944For the irradiated samples at 120 min, 180 min, and 240 min, two bands appear at 804 cm-1--CH bending vibration (phenyl), and 779-745 cm-1-C-O-C bending vibrac”

  Optical Characterization of Ciprofloxacin Photolytic Degradation by UV-Pulsed Laser Radiation DOI: 10.3390/molecules26082324