What absorbs at 579 cm⁻¹ in an FTIR spectrum?
A band near 579 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 7 cited sources
Quick answer
A band near 579 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
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Metal oxygen | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 0.7 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Possible materials
| Material | Supporting peaks | Overlapping groups | Cited sources |
|---|---|---|---|
| TiO2 | 579, 1700, 1093 | Metal oxygen, Methacrylate, C-O single bond | 1 |
| copper oxide | 579, 624, 1686 | Metal oxygen, Methacrylate | 1 |
| copper oxide nanoparticles | 579, 624, 1317 | Metal oxygen, Methacrylate | 1 |
| TiO2 nanoparticles | 579, 1700, 455 | Metal oxygen, Methacrylate, C-O single bond | 1 |
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 579 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
-
C c single bond confidence 1.0
“The band at 579 is possibly TIS-tar assignable to C C ring deformations in polycyclic aromatic hydroTransmittance”
Sun 等 - 2012 - Effect of polymerization with paraformaldehyde on DOI: 10.1016/j.tca.2012.03.015 -
Alkyl C-H confidence 1.0
“LLM confirmed rule peak-group candidate”
Development of New Amphiphilic Catalytic Steam Additives for Hydrothermal Enhanced Oil Recovery Techniques DOI: 10.3390/catal12080921 -
confidence 1.0
“156 cm-1 In the spectra of pure TiO 2, the peak observed at 578.5481 is due to the stretching cm-1 vibration of Ti-O, and 1482.0269 shows stretching vibrations of Ti-O-Ti [20].”
Durai 等 - 2021 - INVESTIGATIONS ON STRUCTURAL, OPTICAL, AND IMPEDAN DOI: 10.4314/bcse.v35i1.13 -
confidence 1.0
“In the spectra of wCuO, Cu-O stretching band was observed at Transmittance 444 and 579 cm-1 and OH stretching at 3117 cm-1 (Figure 2b).”
Green and Traditional Synthesis of Copper Oxide Nanoparticles—Comparative Study DOI: 10.3390/nano10122502 -
Acetate confidence 1.0
“Additionally, the three absorption peaks at 1080 cm-1, 1031 1080 1031 and 579 are mainly due to the stretching vibrations of C-O cm-1, and 579 cm-1 are mainly due to the stretching vibrations of C-O and C-N, as well as and C-N, as well as t”
Shell of Viviparid Snail as an Eco-Friendly Corrosion Inhibitor for Carbon Steel in 1 M HCl DOI: 10.3390/coatings13071136 -
confidence 0.7
“Text: 'peak near 579 might be attributed to the Mo-O bond'”
Rajesham 等 - 2022 - Synthesis, physical, optical and structural studie DOI: 10.21203/rs.3.rs-1495935/v1 -
Phosphate (PO4) confidence 0.7
“PO ν in region 579-592”
Seredin 等 - 2020 - Development of a new approach to diagnosis of the DOI: 10.1038/s41598-020-78078-8
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