What absorbs at 1797 cm⁻¹ in an FTIR spectrum?
A band near 1797 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 5 cited sources
Snabbt svar
A band near 1797 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 |
|---|---|---|---|
| Carbonate | 3 | 2 | 1,0 |
| Carbonyl (C=O) | 3 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Adsorbed carbon monoxide | 1 | 1 | 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 |
| Ring structure | 1 | 0 | 1,0 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Möjliga material
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 1797 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
-
Carbonate förtroende 1,0
“and 2854 quartz mineral were detected at 1874 779 694 and 462 Calcite cm-1 spectrum shows peaks at 1797 due to the C-O stretching of carbonate.”
Microsoft Word - Finished - Mineral Identification of Rocks From Pohon Batu Hot Springs in West Seram Using FTIR Spectroscopy DOI: 10.1088/1742-6596/1572/1/012045 -
Adsorbed carbon monoxide förtroende 1,0
“cm-1, spectrum of the Rh-UFSi catalyst at 2019 and 2079 cm-1, which are characteristic of carIR spectrum of the Rh-UFSi catalyst at 2019 and 2079 which are characteristic of cm-1, carbonyl ligands coordinated to rhodium, and so does a low-i”
Kardasheva 等 - 2023 - Hydroformylation of Alkenes over Phosphorous-Free DOI: 10.3390/catal13050818 -
Carbonate förtroende 1,0
“Even though the spectra of the calcite and barium carbonate are highly similar, the sharp cm-1 peaks located at 1797, 874, and 711 in the spectrum of the specimen can easily be attributed to calcite, as their specific locations are quite di”
A Novel Protection Method for Carbonate Stone Artifacts with Gypsum Weathering Crusts DOI: 10.3390/coatings12111793 -
förtroende 1,0
“Igisu and its collaborators assigned the 100 (AU) 1797cm-1 band to the Si-O bonds of quartz and its har80 2513.75 Transmittance 2924.52 1036cm-1 monics [10].”
Omari 等 - 2019 - Study of the Phosphorus Adsorption on the Sediment DOI: 10.1155/2019/2760204 -
Carbonyl (C=O) förtroende 0,9
“Assigned to uncoordinated EC carbonyl stretching.”
Pekarek 等 - 2020 - Intrinsic chemical reactivity of solid-electrolyte DOI: 10.1039/c9ta13535a
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