What absorbs at 2224 cm⁻¹ in an FTIR spectrum?
A band near 2224 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 6 cited sources
Quick answer
A band near 2224 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 |
|---|---|---|---|
| Nitrile | 3 | 3 | 1.0 |
| Silicon hydride | 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 |
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 2224 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
-
Acetate 置信度 1.0
“FTIR showed formation of stretching vibrations at 2224 cm-1 cm-1 and 1249 which represent C=N and C-O mode important stretching at 1604 respectively.”
Yusoff 等 - 2018 - Theoretical and Experimental Approach Towards P-Cy DOI: 10.1088/1757-899X/374/1/012086 -
Silicon hydride 置信度 1.0
“Si-H rock 663 155 Si-H(N 2Si) stretching 2158 90 Si-H(N 3) stretching 2224”
Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004 -
Nitrile 置信度 0.9
“C≡N stretching”
Arbab Solimani 等 - 2023 - Carboxymethyl Chitosan-Functionalized Polyaniline DOI: 10.1007/s12010-023-04526-6 -
置信度 0.9
“Explicit assignment: 'peak at 2224 assigned to the interaction of ions'”
Effect of ionic liquid on formation of copolyimide ultrafiltration membranes with improved rejection of La3+ DOI: 10.1038/s41598-022-12377-0 -
Nitrile 置信度 0.8
“Band at 2224 cm-1 assigned to nitrile stretch.”
Fontana 等 - 2015 - Synthesis and Characterization of PPV Monomer for DOI: 10.1155/2015/620938 -
置信度 0.7
“Text: '2224 cm-1' in same context”
Spectroscopic and spectrofluorimetric studies on the interaction of irbesartan with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and iodine DOI: 10.1016/j.saa.2011.05.022
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