What absorbs at 568 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 568 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.

可能性のある官能基アサイン

ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。

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 568 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.

これらのアサインの根拠となる文献

• Water (H2O) 信頼度 1.0

  “Molecular water would leave the HA crystal absorption band for molecular water onto the O-H peak at 3,568cm-1 structure through the termination sites of the c-axes channels at (Figure 10) possibly resulted in a misinterpretation 100°C.”

  Li 等 - 2023 - Fourier-transformed infrared spectroscopy study of DOI: 10.3389/feart.2022.1008139
• 信頼度 1.0

  “These two bands were the result of a split in the of the bulk Fe 3O 1 4 at 568 cm-1 corresponded to the υ(Fe-O) lattice stretching vibration of magnetite (Fe 3O 4) cm-1,”

  Mesoporous Magnetic Cysteine Functionalized Chitosan Nanocomposite for Selective Uranyl Ions Sorption: Experimental, Structural Characterization, and Mechanistic Studies DOI: 10.3390/polym14132568
• Silicon-oxygen (Si-O) 信頼度 1.0

  “For sand, no weight 302 loss was observed and only one endothermic peak, at 568°C, associated with the allotropic a b 303 transformation of quartz into quartz , was observed.”

  Cousture 等 - 2021 - Study of a binder based on alkaline activated lime DOI: 10.1016/j.conbuildmat.2007.10.015
• Metal oxygen 信頼度 1.0

  “The bands at 568 and 533 correspond to the vibration of cm-1 cm-1 = V-O [44].”

  Transition Metal Oxodiperoxo Complex Modified Metal-Organic Frameworks as Catalysts for the Selective Oxidation of Cyclohexane DOI: 10.3390/ma13040829
• Silicon-oxygen (Si-O) 信頼度 1.0

  “The band at 568 and vibration of lazurite and O-Si-O symmetric stretching vibration of wollastonite [61].”

  Ma 等 - 2019 - Investigation of the Optical, Physical, and Chemic DOI: 10.3390/su11143803
• 信頼度 1.0

  “New peak assignable to Pd-N.”

  Nasaruddin 等 - 2022 - Synthesis, Structural Characterization, Hirshfeld DOI: 10.1021/acsomega.2c04688
• Phosphate (PO4) 信頼度 1.0

  “from respective PO groups at 1069 and 1081 cm-1 43- (ν ν ν From the O-P-O bending mode PO at 568 cm-1) (for PO and Si-O-Si) [50-52,71], 452, 465 and 43434 3 as (ν ν ν and P-O stretching modes 961 cm-1 PO at 963 cm-1, PO (for PO 43-) [50,51,”

  Radev 等 - 2009 - OrganicInorganic bioactive materials Part II in DOI: 10.2478/s11532-009-0076-1
• Silicon (Si) 信頼度 1.0

  “described that the peaks centered at From literature data, the bands at 568, 600, 960, 1043 cm-1 455 are associated with the presence of ν Si-O-Ca ν ν ν 43-, 43cm-1 and 1008 correspond to PO PO and 4 1”

  Radev 等 - 2010 - OrganicInorganic bioactive materials Part IV In DOI: 10.2478/s11532-009-0142-8