What absorbs at 577 cm⁻¹ in an FTIR spectrum?
A band near 577 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 8 cited sources
Quick answer
A band near 577 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
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Metal oxygen | 2 | 2 | 1.0 |
| Methacrylate | 2 | 1 | 1.0 |
| Acetate | 2 | 1 | 1.0 |
| Carboxyl (COOH) | 2 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Protein beta sheet | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Ketone | 1 | 0 | 1.0 |
| Ester | 1 | 0 | 1.0 |
| Carbonyl (C=O) | 1 | 0 | 1.0 |
| Amide | 1 | 0 | 1.0 |
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
| 材料 | 支持峰 | Overlapping groups | 引用来源 |
|---|---|---|---|
| starch | 577, 1650, 1540 | Methacrylate, Acetate | 1 |
| silk fibroin | 577, 1050, 1511 | Methacrylate | 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 577 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
-
Phosphate (PO4) 置信度 1.0
“874.1 P-O-P asymmetric stretching bond 792.0 P-O-P asymmetric stretching bond 577.1 (H-O-) P=O bond (strong absorption) acid phosphates 527.7 (H-O-) P=O bond (strong absorption) acid phosphates Table 2 FT-Raman wavenumbers and vibrations as”
Growth and characterization of calcium hydrogen phosphate dihydrate crystals from single diffusion gel technique DOI: 10.1002/crat.200900700 -
Alkyl C-H 置信度 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 -
置信度 1.0
“cm-1 cm-1 two peaks at 577 and 709 are attributed to RESULTS AND DISCUSSION stretching and bending vibration modes of the Fe-O in Drug Response Study the Fe-O-Si bonds in (Figure 2).”
Attuluri 和 Darwin - 2022 - Drug Bioavailability, Stability and Anticancer Eff DOI: 10.5530/ijper.56.3s.152 -
置信度 1.0
“The FTIR peaks at 577 and 913 can be assigned 21-S-O”
Dhumal 等 - 2016 - Molecular Interactions of a Cu-Based Metal-Organic DOI: 10.1021/acs.jpcc.5b10123 -
Protein beta sheet 置信度 1.0
“The DTA curve of SF also shows an d extraction59 β-sheet intense peak at 577 °C, originating from the amorphous sericin and the degummed fibroin”
A Hybrid {Silk@Zirconium MOF} Material as Highly Efficient AsIII-sponge DOI: 10.1038/s41598-020-66091-w -
Acetate 置信度 1.0
“Inthisstudy, major bands at760 cm-1, cm-1 cm-1 1010, 1080 and 1150 which are associated with the and 577 and minor bands between 577 and 400 in C-O C-C coupled and stretching vibrations of the polysactheinfraredspectra(Fig.1)ofstarchandinul”
Pourfarzad 等 - 2015 - Serish inulin and wheat biopolymers interactions i DOI: 10.1007/s13197-015-1939-4 -
Metal oxygen 置信度 0.9
“Text: '577 cm-1 ... Zn-O symmetric stretching vibration in ZnO4'”
Zaid 等 - 2016 - Fabrication and Crystallization of ZnO-SLS Glass D DOI: 10.1155/2016/8084301 -
置信度 0.8
“Text: 'peak of CDDP at 568 moved to 577'.”
Hu 等 - 2022 - Flotation Performance and Adsorption Mechanism of DOI: 10.3390/min12040441
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