What absorbs at 529 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 529 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 529 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

• confidence 1.0

  “The peak at 529.0 eV was tem with pore diameters varying from molecular to a linked to the oxygen species bounded to copper in macro level.”

  Hydrothermal synthesis of CuO and CeO2/CuO nanostructures: spectroscopic and temperature dependent electrical properties DOI: 10.1007/s10854-021-05423-6
• confidence 1.0

  “The peak at 529 eV is associated with the lattice oxygen, and that at 531 eV is due to the absorbed oxygen [10, 11].”

  Control of magnetic properties and band gap by Co/Mn ordering and oxygen distributions of La2CoMnO6 DOI: 10.1016/j.jmmm.2017.03.040
• Metal oxygen confidence 1.0

  “The peak at 529.46 eV appears due to We are thankful to Thapar Institute of Engineering & metal-oxygen bonding and the peak at 530.8 eV can be Technology for providing a vibrating sample magnetometer ascribed to oxygen vacancies or metal-hy”

  Phor 等 - 2020 - Zn(2+)substituted superparamagnetic MgFe(2)O(4)spi DOI: 10.1007/s40145-020-0396-3
• Acetate confidence 1.0

  “The O 1s peak at 530 eV representing C-O group of alcoholic and ether can be fitted into peaks at 529.1eV showing C-O [26] and 531.7 eV showing C=O [27] peaks of lignin, cellulose and hemicellulose.”

  Enhanced arsenic (iii) adsorption from aqueous solution by magnetic pine cone biomass DOI: 10.1016/j.matchemphys.2018.09.067
• Metal oxygen confidence 1.0

  “3 b, composite at the core-level Ni 2p, O 1 s, N 1 s, C 1 s, and S the peaks have been noticed at 529.3 eV(Ni-O) [60] and 531.3 eV = 2p peaks [ 55 , 56 ].”

  Synthesis and characterization of chitosan-polyaniline-nickel(II) oxide nanocomposite DOI: 10.1016/j.molstruc.2021.130750
• confidence 1.0

  “The 2 deconvoluted Ce 3d spectrum suggests the existence of mixed-valence statesforCeionsinthenanoparticles.Averystrongpeakatlowbindingenergy528.7eV(O LBE)inO1score-levelspectrumisattributedtothelattice oxygen, and other high binding energy”

  An efficient chemical sensor based on CeO2 nanoparticles for the detection of acetylacetone chemical DOI: 10.1016/j.jelechem.2020.114089
• confidence 1.0

  “EDS spectrum of Co3O4 The lower binding energy peak at 528.66 eV corresponds to oxygen species in the spinel Co3O4 phase [35].”

  An insight in the structural, morphological, electrical and optical properties of spray pyrolysed Co3O4 thin films DOI: 10.1016/j.matchemphys.2015.07.015
• Metal oxygen confidence 1.0

  “The peak at 529.30 eV binding energy corresponding to the metal-oxygen (M-O) lattice confirms the formation”

  Single-Layered Biosynthesized Copper Oxide (CuO) Nanocoatings as Solar-Selective Absorber DOI: 10.3390/app13031867