What absorbs at 517 cm⁻¹ in an FTIR spectrum?
A band near 517 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 517 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 | 3 | 3 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Silicon (Si) | 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 |
| Metal carbon | 1 | 1 | 0,9 |
| Sulfur | 1 | 1 | 0,8 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
| Material | Stödjande toppar | Överlappande grupper | Citerade källor |
|---|---|---|---|
| ZnO | 517, 1400, 3430 | Metal oxygen, Methoxy (OCH3) | 1 |
| hematite | 517, 1030, 469 | Silicon-oxygen (Si-O), Silicon (Si), Metal oxygen | 1 |
| Kaolinite | 517, 3696, 693 | Silicon-oxygen (Si-O), Silicon (Si), Metal oxygen | 1 |
| ZnO nanoparticles | 517, 1219, 1726 | Metal oxygen | 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 517 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
-
förtroende 1,0
“9 b, it can be 2 cm-1 seen a bare TiO displays abroad bandbelow 517 due to 2 the vibration of Ti-O-Ti bonds in TiO (Djellabi et al.”
New composite material based on Kaolinite, cement, TiO2 for efficient removal of phenol by photocatalysis DOI: 10.1007/s11356-021-13150-y -
Metal oxygen förtroende 1,0
“The absorption band at 517 cm-1 vibration of Zn-O bonds and confirms the formation of materials [44].”
Innovative Investigation of Zinc Oxide Nanoparticles Used in Dentistry DOI: 10.3390/cryst12081063 -
Acetate förtroende 1,0
“646.78 CS stretching - 1384.21 Asymmetric COC stretching of lignin 517.10 - Out of plane bending of OH C-O stretching of acetyl group in lignin and hemicel- -”
Biodegradable Green Composites: Effects of Potassium Permanganate (KMnO4) Treatment on Thermal, Mechanical, and Morphological Behavior of Butea Parviflora (BP) Fibers DOI: 10.3390/polym15092197 -
förtroende 1,0
“below new bands appeared at 517 and 303cm-1, The bond distances of the complex obtained in this work assigned to the Zn-N stretching, and at 317 and”
Cordeiro 等 - 2019 - A Novel Zn-II Complex Bearing Two Monodentate (4-M DOI: 10.1155/2019/7876495 -
Silicon (Si) förtroende 1,0
“peaks at 797, 779 and 693 For the same samples, the sharp band at 456 and cm-1-this the peak at 517 last one observed only in PK11552-can be ascribed to Si-O bending vibrations [31].”
Assessment of Easily Accessible Spectroscopic Techniques Coupled with Multivariate Analysis for the Qualitative Characterization and Differentiation of Earth Pigments of Various Provenance DOI: 10.3390/min12060755 -
förtroende 1,0
“The presence of tetrahedral titanium in the TiO2/Al-ZSM-12 sample, which forms SiO-Ti bonds, is confirmed by bands with maxima at 517 cm-1 (Raman, Figure 4b) [42,43] and 953 cm-1 (DRIFTS, Figure 4d) [44,45].”
Synthesis and Investigation of Zeolite TiO2/Al-ZSM-12 Structure and Properties DOI: 10.3390/catal13020216 -
Metal carbon förtroende 0,9
“Explicit assignment for R”
Ashfaq 等 - 2016 - SYNTHESIS AND BIOLOGICAL ACTIVITY OF NEW SERIES OF DOI: 10.5935/0100-4042.20150171 -
Sulfur förtroende 0,8
“Bands due to s(C=O).”
Hyperoxaluria is related to whewellite and hypercalciuria to weddellite: What happens when crystalline conversion occurs? DOI: 10.1016/j.crci.2015.12.011
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