What absorbs at 586 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 586 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 586 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

• Metal oxygen confidence 1.0

  “assumed that the carboxylic group ) present in aqueous peel cm(cid:0) 1 strong additional peak at 586 ascertained the stretching vibration extract that undergoes complex formation or chelation reaction with Fe-O Fe3O4-NPs (Prasad et al., 20”

  Green synthesis of magnetite nanoparticles using Lathyrus sativus peel extract and evaluation of their catalytic activity DOI: 10.1016/j.clet.2021.100117
• Metal oxygen confidence 1.0

  “LLM confirmed rule peak-group candidate”

  Kiswanto 等 - 2018 - Effect of Zinc on Crystal Structure and Magnetic P DOI: 10.1088/1757-899X/367/1/012001
• Phosphate (PO4) confidence 1.0

  “986.2 P-O-P asymmetric stretching bond 875.2 P-O-P asymmetric stretching bond 586.0 (H-O-) P=O bond (strong absorption) acid phosphates 521.9 (H-O-) P=O bond (strong absorption) acid phosphates cm-1 The strong absorptions at 577.1 and 527.7”

  Growth and characterization of calcium hydrogen phosphate dihydrate crystals from single diffusion gel technique DOI: 10.1002/crat.200900700
• confidence 1.0

  “The characteristic absorption bands between 586.25 and 450.3 cm-1 cm´1 450.3 are assigned to the vibration of the bond between the oxygen atom and the metal ions”

  Biodiesel Production by Aspergillus niger Lipase Immobilized on Barium Ferrite Magnetic Nanoparticles DOI: 10.3390/bioengineering3020014
• Hydroxyl (O-H) confidence 1.0

  “The peak at around 586 was assigned to the vibration of O-H out-of-plane bending [28].”

  Discrimination of Syzygium samarangense cv. ‘Giant Green’ Leaves at Different Maturity Stages by FTIR and GCMS Fingerprinting DOI: 10.3390/horticulturae9050609
• Nitro (NO2) confidence 1.0

  “Lastly, the peak appearing at 586 cm-1 indicates XRD and XPS data, our nanocomposite mostly possesses 2H MoS phase with low or no 2 the presence of Te-O stretching bond vibration [38].”

  Synthesis of Molybdenum Sulfide/Tellurium Hetero-Composite by a Simple One-Pot Hydrothermal Technique for High-Performance Supercapacitor Electrode Material DOI: 10.3390/nano11092346
• confidence 1.0

  “As shown in the FTIR of zinc-biochar nanocomposite after application for Cr(VI) adsorption, showing cm-1 cm-1 Figure 8, the peaks at 586 and 636 were observed only in the HBC/nZVI the hydroxyl groups formed on the biochar composite after ad”

  Biochar Nanocomposite as an Inexpensive and Highly Efficient Carbonaceous Adsorbent for Hexavalent Chromium Removal DOI: 10.3390/ma15176055
• Aromatic ring confidence 1.0

  “Moreover, the discussed aromatic ring modes ν(CO) CH2O, δ(CH), ν(CC) CH2-CH2/ρ w(CH 2) CH3, ν(OC) OCH2/ indicate contribution to the bands observed at 586ρ r(CH 2), ν(CC) CH2-CH2/ν(OC) OCH3, ρ r(OC 2H 4), and δ(CCO)/”

  Piergies 等 - 2019 - Vibrational Fingerprint of Erlotinib FTIR, RS, an DOI: 10.1155/2019/9191328