What absorbs at 2008 cm⁻¹ in an FTIR spectrum?
A band near 2008 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 2008 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 |
|---|---|---|---|
| Secondary amine | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Hydrogen bond | 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 |
| Phospholipid | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| N-O bond | 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
| 素材 | 補助ピーク | Overlapping groups | 引用元 |
|---|---|---|---|
| bacterial cellulose | 2008, 1050, 1631 | Methoxy (OCH3) | 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 2008 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
-
N-O bond 信頼度 1.0
“Na+ and NO Moreover, in the RH range from formation of contact ion pairs between (cid:3)26%, (cid:2) 3cm-1 down to two peaks at 836 and 829 were observed in the 2-NO band region, 2008 American Institute of solid particles and droplets.”
Lu 等 - 2008 - Molecular events in deliquescence and efflorescenc DOI: 10.1063/1.2973623(cid:5) -
Amide 信頼度 1.0
“Aust J Chem 1139-1143 Baker MJ, Brown MD, Gazi E, Clarke NW, Vickerman JC, Lockyer NP Cai S, Ram Singh B (2004) A distinct utility of the Amide III infrared band (2008) Discrimination of prostate cancer cells and non-malignant cells for sec”
Baker 等 - 2008 - FTIR-based spectroscopic analysis in the identific DOI: 10.1038/sj.bjc.6604753 -
Carboxyl (COOH) 信頼度 1.0
“The differences in biochemistry acid in immune cell membrane phospholipids corresponding to these distinct peaks might (Calder, 2008).”
El Mohtadi 等 - 2020 - DIFFERENTIAL ENGULFMENT OF STAPHYLOCOCCUS AUREUS A DOI: 10.17179/excli2020-2766 -
Acetate 信頼度 1.0
“In addition, two new peaks cm(cid:1)1 were also observed after fully charge (Cholpek et al., 2008), of stretching C-O at 1,088 and 1,185”
High-voltage and long-lasting aqueous chlorine-ion battery by virtue of “water-in-salt” electrolyte DOI: 10.1016/j.isci. -
Hydrogen bond 信頼度 1.0
“Thus, the Here, it should be noted that the bands at 3488 3447 cm-1 band at 3345 (O H stretch of cellulose type I) (Moharram & assigned for OH stretching intramolecular hydrogen bonding as cm-1 2008) and the band at 3240 (stretching of hydr”
Komagataeibacter rhaeticus as an alternative bacteria for cellulose production DOI: 10.1016/j.carbpol.2016.06.049 -
N h 信頼度 1.0
“In summary, there are two InfraredSpectraofNonaromaticAminoAcids,Chem.Phys.Lett., challenges for an anharmonic theory of the NH-stretching 2008, 453, 1-6.”
Otto 等 - 2011 - Temperature-dependent intensity anomalies in amino DOI: 10.1039/C1CP20883G
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