What absorbs at 2380 cm⁻¹ in an FTIR spectrum?
A band near 2380 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 2380 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 | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 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 |
| C c single bond | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 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
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 2380 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
-
Amide 信頼度 1.0
“Other new peaks at 2380, 2341 and 1845 can be ascribed to C N or C C stretching vibration (cid:7) (cid:7)”
Green synthesis of bimetallic Pt@Cu nanostructures for catalytic oxidative desulfurization of model oil DOI: 10.1007/s40097-017-0223-8 -
Acetate 信頼度 1.0
“cm(cid:2)1 cm(cid:2)1 and 895 may be due to peaks at 2380 by metallic cation absorption of atmospheric CO 2 respectively.41,42 and C-O-C stretching bands, Figure 11 shows the Raman spectrum of Al:ZnO”
Pandey 等 - 2016 - Deposition and Characterization of AlZnO Thin Fil DOI: 10.1007/s11664-016-4750-8 -
Carbon dioxide 信頼度 1.0
“LLM confirmed rule peak-group candidate”
Afqir 等 - 2018 - Structural, electric and dielectric properties of DOI: 10.2298/PAC1801072A -
Alkyl C-H 信頼度 1.0
“The peak at 2 936 is attributed to C-H stretch2380 atomic absorption spectrophotometer.”
Singh 和 Kumawat - 2012 - Preparation and characterisation of tamarind 4-hyd DOI: 10.4314/wsa.v38i4.7 -
Carbon dioxide 信頼度 0.8
“Snippet: 'strong absorption at 2300-2380 by normal CO'”
Kim 等 - 2020 - Extremely Robust Remote-Target Detection Based on DOI: 10.3390/s20102896 -
信頼度 0.6
“Assigned in text.”
Zhang 等 - 2002 - Thermal properties of Bombyx mori silk fibers DOI: 10.1002/app.11089
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