What absorbs at 2272 cm⁻¹ in an FTIR spectrum?
A band near 2272 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 2272 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 |
|---|---|---|---|
| N c o | 2 | 2 | 1.0 |
| Lewis acid site | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Metal hydroxyl | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 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 2272 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
-
Metal oxygen 置信度 1.0
“3(OH)2972 As-O vibration Asymmetric stretch of As-O AsO 2272 Al-OH vibration OH stretching for basic hydroxyl groups from Al-OH Al(OH) Al(III) 3 2O 2388”
The effect of electrocoagulation (EC) on total arsenic, arsenite (As3+) and arsenate (As5+) species removal from model groundwater investigating toxicity and sludge characteristic DOI: 10.1007/s13201-022-01660-0 -
N c o 置信度 1.0
“For PI-NCO (Figure 4c), a strong absorption peak appeared at 2272 cm-1, which was attributed to the stretching vibration of -NCO in HDI.”
Synthesis and Characterization of Linear Polyisoprene Supramolecular Elastomers Based on Quadruple Hydrogen Bonding DOI: 10.3390/polym12010110 -
Lewis acid site 置信度 1.0
“cm(cid:1)1 resistively heated and the temperature of the sample was due to CH 3CN molecularly Besides the band at 2295 (Ti3+) cm(cid:1)1 measuredbyNiCr-Nithermocouplespot-weldeddirectlytothe adsorbed on weak Lewis acid sites a band at 2272”
Rasko 和 Kiss - 2006 - Adsorption and catalytic reactions of acetonitrile DOI: 10.1016/j.apcata.2006.01.024 -
N c o 置信度 0.9
“Explicit assignment: 'υNCO at 2272 cm-1'”
The Influence of Long-Time Storage on the Structure and Properties of Multi-Block Thermoplastic Polyurethanes Based on Poly(butylene adipate) Diol and Polycaprolactone Diol DOI: 10.3390/ma16020818
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