What absorbs at 2363 cm⁻¹ in an FTIR spectrum?
A band near 2363 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 7 cited sources
Quick answer
A band near 2363 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.
可能性のある官能基アサイン
| 官能基 | 裏付け事実 | 引用元 | 最高信頼度 |
|---|---|---|---|
| Carbon dioxide | 3 | 3 | 1.0 |
| Ammonium | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Nitrile | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Anhydride | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 0 | 1.0 |
| Hydroxyl (O-H) | 1 | 0 | 1.0 |
ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。
Possible materials
| 素材 | 補助ピーク | Overlapping groups | 引用元 |
|---|---|---|---|
| Polyurethane | 2363, 2270, 1700 | N 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 2363 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.
これらのアサインの根拠となる文献
-
Carbon dioxide 信頼度 1.0
“The band at 2363 is due to cm-1 CO2, which is generally observed in IR spectra.”
Choubey 等 - 2007 - Influence of doping on OH absorption in LiNbO3 cry DOI: 10.1002/crat.200610894 -
Metal oxygen 信頼度 1.0
“The bands that appear in the range 1148-1464 occur as a result of Metal-Oxygen-Metal (M-O-M) such 14 cm-1 as Fe-O-Fe and Co-O-Co [28].The presence of CO is evident by the observation of the band at 2363 15 2”
Mohammed 等 - 2018 - Effect of heat-treatment on the magnetic and optic DOI: 10.1088/2053-1591/aad1e5 -
Carbon dioxide 信頼度 1.0
“LLM confirmed rule peak-group candidate”
Singh 等 - 2012 - Detection of Defects in ZnO Nanoparticles by Spect DOI: 10.1063/1.4736887 -
Carbon dioxide 信頼度 1.0
“The significant peak at 1628 cm-1 around 2363 might have been due to stretching O=C=O in CO 2.”
Mesoporous Magnetic Cysteine Functionalized Chitosan Nanocomposite for Selective Uranyl Ions Sorption: Experimental, Structural Characterization, and Mechanistic Studies DOI: 10.3390/polym14132568 -
Nitrile 信頼度 1.0
“A strong peak at 2363 can be attributed cm-1 C≡N to stretching in nitriles [55] and O=C=O stretching in CO [56].”
Thermal Hazard and Smoke Toxicity Assessment of Building Polymers Incorporating TGA and FTIR—Integrated Cone Calorimeter Arrangement DOI: 10.3390/fire5050139 -
N h 信頼度 1.0
“After modified by 2-aminoethanol, the FTIR Polymers 2020, 12, x FOR PEER REVIEW 4 of 13 peaks at 2363 cm-1 and 2342 cm-1, which are assigned to NH+ in rhodamine 6G, disappear.”
A Fluorescent Polyurethane with Covalently Cross-Linked Rhodamine Derivatives DOI: 10.3390/polym12091989 -
信頼度 0.7
“Band at 2363 associated with Lewis acid centers.”
Comparative study of the strongest solid Lewis acids known: ACF and HS-AlF3 DOI: 10.1039/c8dt03279c
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