What absorbs at 2112 cm⁻¹ in an FTIR spectrum?
A band near 2112 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
Quick answer
A band near 2112 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.
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Adsorbed carbon monoxide | 2 | 1 | 1.0 |
| Azide | 1 | 1 | 1.0 |
| Carbon dioxide | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 0 | 1.0 |
| C#c | 1 | 0 | 1.0 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
Spectrum logic
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 2112 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
这些分配背后的文献
-
Adsorbed carbon monoxide 置信度 1.0
“In a flow 2 cm-1 of this reaction mixture, a constant intensity of the overlapping adsorbed CO at about 2340 appeared briefly at around 1 2 cm-1 bands at 2112 and 2090 min.”
In Situ Transient FTIR and XANES Studies of the Evolution of Surface Species in CO Oxidation on Au/TiO<sub>2</sub> DOI: 10.1021/jp0568733 -
Azide 置信度 1.0
“Regarding AASC, a strong peak at 2112 cm-1 was assigned to the azide group.”
Synthesis and Antioxidant Activity of Cationic 1,2,3-Triazole Functionalized Starch Derivatives DOI: 10.3390/polym12010112 -
置信度 0.9
“Explicit assignment: '2112-2114cm-1 observed for the band of CO adsorbed on isolated Pt atoms'”
Litke 等 - 2019 - Interfacial charge transfer in Pt-loaded TiO2 P25 DOI: 10.1016/j.jphotochem.2018.10.023 -
置信度 0.8
“Text states: 'The existence of CO is verified by bands at 2112'”
Fabrication and Characterization of Lignin/Dendrimer Electrospun Blended Fiber Mats DOI: 10.3390/molecules26030518
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