What absorbs at 1501 cm⁻¹ in an FTIR spectrum?
A band near 1501 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 1501 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 |
|---|---|---|---|
| Alkene (C=C) | 2 | 2 | 1.0 |
| Imide | 2 | 2 | 1.0 |
| Anhydride | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 0.8 |
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 1501 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
-
Imide 信頼度 1.0
“1376-cm(cid:2)1 the imide band normalized to the 1501gion.”
Studies on the photodegradation of polarized UV-exposed PMDA-ODA polyimide films DOI: 10.1002/app.11315 -
Imide 信頼度 1.0
“The degree of imidization was followed at the 1375cm-' imide band, normalized to the 1501cm-' band as internal October isolated from other standard.”
Ha 等 - 1998 - Polarized Infrared Spectroscopic Studies of Polari DOI: 10.1080/10587259808025380 -
Alkene (C=C) 信頼度 1.0
“3417 and bending vibrations, 1001 - corresponds to single bond The increase in the Absorbance 2000cm(cid:1)1 3642cm(cid:1)1 stretches, 1501 - value of Wavenumber corresponds to double bond stretch, as shown in Fig.”
Nari 等 - 2021 - A comparative study on the thermal behaviour of PP DOI: 10.1016/j.matpr.2020.05.708 -
Alkene (C=C) 信頼度 1.0
“cm-1 (Figure2 2), Based on FTIR spectra graphite has C=C stretching at 1501 1609c 1497”
Sugianto 等 - 2019 - Facile Synthesis of Lycopene Reduced Graphene Oxid DOI: 10.1088/1757-899X/546/4/042044 -
信頼度 0.9
“Text: '1501cm-1 KL2 1515cm-1 ]C-N'”
Nqombolo 和 Ajibade - 2016 - Synthesis and Spectral Studies of Ni(II) Dithiocar DOI: 10.1155/2016/1293790 -
C-O single bond 信頼度 0.8
“Explicit assignment: 'asymmetric stretch) appeared around 1501' and context suggests C-O-C”
The inhibition performance of a novel benzenesulfonamide-based benzoxazine compound in the corrosion of X60 carbon steel in an acidizing environment DOI: 10.1039/d0ra10317a
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