What absorbs at 2152 cm⁻¹ in an FTIR spectrum?
A band near 2152 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
Quick answer
A band near 2152 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 |
|---|---|---|---|
| Silicon hydride | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Adsorbed carbon monoxide | 1 | 1 | 1.0 |
| Nitrile | 1 | 1 | 0.9 |
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。
Possible materials
| 材料 | 支持峰 | Overlapping groups | 引用来源 |
|---|---|---|---|
| TiO2 | 2152, 1700, 1093 | Metal oxygen, Hydroxyl (O-H) | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
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 2152 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
“cm-1) other two bands at higher frequencies (2161 and 2152 required more time for complete The other two bands at higher frequencies (2161 cm-1 and 2152 cm-1) required more time for complete desorption, and for this reason they can be assig”
Atzori 等 - 2020 - Adsorption Properties of Ce-5(BDC)(7.5)(DMF)(4) MO DOI: 10.3390/inorganics8020009 -
Metal oxygen 置信度 1.0
“respect to the liquid like, which decreased concomitantly to the restoration of the bands at 3600 cm-1 These evidences allowed us to assign the 2152 band to an interaction of CO with the residual OH group still present on some Zr-O cornerst”
Braglia 等 - 2017 - Exploring structure and reactivity of Cu sites in DOI: 10.1016/j.cattod.2016.02.039 -
Hydroxyl (O-H) 置信度 1.0
“From this we can state that the cm-1, cm-1, slightly downward shifting with the coverage to 2152 is due to -OH····CO peak at 2156 complexes on the (020) and/or (110) crystalline planes of the multiwalled titanate nanotubes, in data.48 agree”
Cesano 等 - 2010 - Designing TiO2 Based Nanostructures by Control of DOI: 10.1021/jp9087207 -
Silicon hydride 置信度 1.0
“In contrast, for Du1800-Pd precursor (Figure 6b), the intensity of cm-1), cm-1), cm-1), absorption bands corresponding to N-H (3343 C-H (2960 Si-H (2152 cm-1), -COO-1”
Porous Silicon Oxycarbonitride Ceramics with Palladium and Pd2Si Nanoparticles for Dry Reforming of Methane DOI: 10.3390/polym14173470 -
Nitrile 置信度 0.9
“Explicit assignment: C≡N stretching frequency at 2152 cm⁻¹”
Gerber 和 Erasmus - 2018 - Electronic effects of metal hexacyanoferrates An DOI: 10.1016/j.matchemphys.2017.09.029
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