What absorbs at 527 cm⁻¹ in an FTIR spectrum?
A band near 527 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
Snel antwoord
A band near 527 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.
Mogelijke functionele-groeptoewijzingen
| Functionele groep | Ondersteunende feiten | Geciteerde bronnen | Hoogste vertrouwen |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Protein alpha helix | 1 | 1 | 1,0 |
Ranglijst weerspiegelt cumulatief literatuurbewijs, niet één gezaghebbende regel. Bevestig altijd aan de hand van uw monsterecontext.
Mogelijke materialen
| Materiaal | Ondersteunende pieken | Overlappende groepen | Geciteerde bronnen |
|---|---|---|---|
| iron oxide nanoparticles | 527, 2972, 528 | Metal oxygen | 1 |
| quartz | 527, 800, 3053 | Silicon-oxygen (Si-O), Metal oxygen | 1 |
| Hydroxyapatite | 527, 1620, 1639 | Phosphate (PO4) | 1 |
Materialen worden alleen getoond wanneer dezelfde literatuurpool deze band en ten minste één extra karakteristieke piek ondersteunt.
Spectrumlogica
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 527 cm⁻¹ is usually not enough for material identification by itself.
Gebruik in de praktijk
Dit type query komt vaak voor bij polymeeridentificatie, screening van onbekende kunststoffen, probleemoplossing bij QC, verificatie van gerecycled materiaal en literatuurondersteunde beoordeling van piektoewijzing.
Veelgemaakte fouten
- Het behandelen van een enkele geïsoleerde band als bewijs van een materiaal zonder ten minste een of twee ondersteunende pieken te controleren.
- Overlap negeren: meerdere functionele groepen kunnen bijdragen rond hetzelfde golfgetal.
- Validatie overslaan wanneer additieven, mengsels, oxidatie of verontreiniging het spectrum kunnen verstoren.
Advies voor verificatie
Wanneer dubbelzinnigheid blijft bestaan, valideer de hypothese met DSC, GC-MS of TGA, vooral voor mengsels, gedegradeerde monsters en gevulde polymeren.
Literatuur achter deze toewijzingen
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vertrouwen 1,0
“Plants contain cm-1 calcined spectrum showed bands located at 527 and 434 various secondary compounds such as phenols, flavonoids, cm-1, which can be attributed to the vibration of Fe 2O NPs glycosides, alkaloids, etc., which act as a reduc”
Khan 等 - 2022 - Biosynthesis and characterization of iron oxide na DOI: 10.3389/fpls.2022.1001499 -
Metal oxygen vertrouwen 1,0
“Further calcining the precursors at the absorption bands around at cm-1 527, 738, 777, and 919 are observed, which are typical peaks for the M-O (possible Bi-O and Al-O stretching frequencies) vibrations and can be assigned to Bi 2Al 4O 9.”
Zhang 等 - 2013 - Synthesis and Characterization of Bi2Al4O9 Powders DOI: 10.4028/www.scientific.net/AMR.624.34 -
Protein alpha helix vertrouwen 1,0
“Their 512cm-1, α-helix showed that the proportion of structures decreases, corresponding Raman spectral peaks are at 527cm-1, 547cmβ-sheet 1, and respectively.”
Du 等 - 2022 - Green and Highly Efficient Wool Keratin Extraction DOI: 10.3389/fmats.2021.789081 -
vertrouwen 1,0
“72 C-I stretching Halo compound 527 81 77 72 C-Istretching Halocompound 718 83 77”
A Comparison of Water Imbibition and Controlled Deterioration in Five Orthodox Species DOI: 10.3390/agronomy12071486 -
Phosphate (PO4) vertrouwen 1,0
“LLM confirmed rule peak-group candidate”
Effect of preparation conditions on the nanostructure of hydroxyapatite and brushite phases DOI: 10.1007/s13204-015-0509-4 -
Carbonate vertrouwen 1,0
“c, KR/527 showing peak for muscovite and calcite.”
Randive 等 - 2021 - Role of hydrothermal fluids in the deterioration o DOI: 10.18520/cs/v121/i2/255-263 -
Metal oxygen vertrouwen 1,0
“These peak shifts to 467 cm-1, whereas, the Al-O-Si was shifted to 527 cm-1, for both metal ions.”
Salah 等 - 2019 - The Removal of Uranium and Thorium from Their Aque DOI: 10.3390/min9100626 -
vertrouwen 1,0
“strong band at 527 Chloroacetate vibrations Vibration belonging to the link between the C-Cl is significant to discuss here since mixing of”
Sreedevi 等 - 2023 - GROWTH, CHARACTERIZATION AND CHEMICAL COMPUTATIONS DOI: 10.4314/bcse.v37i4.18
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