What absorbs at 2115 cm⁻¹ in an FTIR spectrum?
A band near 2115 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 4 cited sources
Snabbt svar
A band near 2115 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 |
|---|---|---|---|
| Adsorbed carbon monoxide | 4 | 2 | 1,0 |
| C#c | 1 | 1 | 1,0 |
| Silicon hydride | 1 | 0 | 1,0 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
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 2115 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
-
Adsorbed carbon monoxide förtroende 1,0
“DRIFTS results on 2 cm-1 bands at 2115 and 2173 are indicative of linearly adsorbed CO adsorption using in situ FTIR (DRIFTS) was used to probe the on metallic gold [5] and the titania support [29], respectively, CO”
Gaur 等 - 2013 - CO oxidation studies over cluster-derived AuTiO2 DOI: 10.1016/j.cattod.2012.10.029 -
C#c förtroende 1,0
“cm-1) The sharp vibration υ (2115 may be attributed sue of the heart such as the fibroblast [35] and ultimately s to a C ≡C (alkyne) which could be present in the thercausing grave biological damage and cardiopulmonary”
Kibet 等 - 2018 - Free radicals and ultrafine particulate emissions DOI: 10.1186/s13065-018-0458-6 -
Adsorbed carbon monoxide förtroende 1,0
“The spectra were recorded at (2115cm-1) ascribed to CO adsorbed on isolated Pt atoms and metallic 4cm-1 3950-600cm-1 resolution in the range by averaging 100 in- (2057cm-1), [31-34].”
Litke 等 - 2019 - Interfacial charge transfer in Pt-loaded TiO2 P25 DOI: 10.1016/j.jphotochem.2018.10.023 -
förtroende 0,9
“Band at 2115 attributed to ferricyanide in water”
Cheah 和 Chernev - 2021 - Electrochemical oxidation of ferricyanide DOI: 10.1038/s41598-021-02355-3
Har du ett spektrum med detta band?
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