What absorbs at 478 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 478 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.

可能的官能团归属

排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。

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 478 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.

这些分配背后的文献

• 置信度 1.0

  “Energy dispersive X-ray structures of hematite moved the peak ranges from 478 (EDX) analyses showed a lot of potassium (0.384-4.057%) cm-1 cm-1 to 456 and 574 to 530 (Kosmas et al.”

  An integrated toolkit using multiple methods for determining the potential sources of iron and manganese in groundwater: a case study from the lower Kelantan River Basin, Malaysia DOI: 10.1007/s12665-021-09756-7
• 置信度 1.0

  “The FTIR spectrum of the mulation with a size that matched the optical microscopy PVA-UHMWPEO/Ag@SiO nanocomposite exhibited several images, where the size of Ag cores was calculated to be 2 cm-1 new absorption peaks, such as 478 of (Si-O)”

  Al-Bermany 等 - 2023 - Effect of green synthesis bimetallic Ag@SiO2 core- DOI: 10.1007/s12633-023-02332-7
• 置信度 1.0

  “The high-frequency mode at 579 and the peak at 478 can be attributed to cm-1, the Cu-O stretching vibration.”

  Structural and UV-blocking properties of carboxymethyl cellulose sodium/CuO nanocomposite films DOI: 10.1038/s41598-023-28032-1
• Silicon-oxygen (Si-O) 置信度 1.0

  “In BB5, in addition to the characteristic features of haematite (Fe 2O 3) at 568 and 478 cm-1, the vibrational absorption of quartz (SiO 2), usually occuring in red ochre mixed with haematite, at 797, 781, and 693 cm-1 [49,50], was also App”

  The 20th Century Wall Paintings in the Chapel of the Fallen in Parma Cathedral (Italy): Scientific Investigations for a Correct Conservation Project DOI: 10.3390/app13127235
• Alkyl C-H 置信度 1.0

  “Small cm-1 bands between 478 and 648 are related to C-H vibration [31].”

  Impedance, Electrical Equivalent Circuit (EEC) Modeling, Structural (FTIR and XRD), Dielectric, and Electric Modulus Study of MC-Based Ion-Conducting Solid Polymer Electrolytes DOI: 10.3390/ma15010170
• Metal oxygen 置信度 0.9

  “Assigned to Fe-O.”

  Hydrothermal synthesis and characterization of amp#x003B1;-Fe2O3 nanoparticles DOI: 10.1016/j.mssp.2012.12.029
• Metal oxo 置信度 0.8

  “V-O-V vibrational stretching bond”

  Selvakumar 等 - 2022 - Antibacterial Efficacy of Phytosynthesized Multi-M DOI: 10.1155/2022/6506796
• 置信度 0.7

  “Band at 478 cm-1 recognized as octahedral metal stretching”

  Kiswanto 等 - 2018 - Effect of Zinc on Crystal Structure and Magnetic P DOI: 10.1088/1757-899X/367/1/012001