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
Snabbt svar
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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| 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 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| starch | 577, 1650, 1540 | Methacrylate, Acetate | 1 |
| silk fibroin | 577, 1050, 1511 | Methacrylate | 1 |
Material visas endast när samma litteraturpool stöder detta band och minst en ytterligare karakteristisk topp.
Spektrumlogik
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.
Användning i verkligheten
Denna typ av fråga är vanlig inom polymeridentifiering, screening av okänd plast, felsökning av kvalitetskontroll, verifiering av återvunnet material och litteraturstödd toppidentifieringsgranskning.
Vanliga misstag
- Behandla ett isolerat band som bevis på ett material utan att kontrollera minst en eller två stödjande toppar.
- Ignorerar överlapp: flera funktionella grupper kan bidra nära samma vågtal.
- Hoppa över validering när tillsatser, blandningar, oxidation eller föroreningar kan förvränga spektrat.
Verifieringsråd
När oklarhet kvarstår, validera hypotesen med DSC, GC-MS eller TGA, särskilt för blandningar, nedbrutna prover och fyllda polymerer.
Litteratur bakom dessa identifieringar
-
Phosphate (PO4) förtroende 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 förtroende 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 -
förtroende 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 -
förtroende 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 förtroende 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 förtroende 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 förtroende 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 -
förtroende 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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