What absorbs at 2834 cm⁻¹ in an FTIR spectrum?
A band near 2834 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 4 cited sources
Quick answer
A band near 2834 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 |
|---|---|---|---|
| N h | 2 | 2 | 1.0 |
| Amine primary | 2 | 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 |
| Protein | 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。
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 2834 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
-
信頼度 1.0
“The absorbance peaks at 3190 cm-1 and 2834 cm-1 corresponded to N-H functional groups of primary amine in proteins, while the peak at 1531 cm-1 corresponded to C=N stretchPharmaceutics2021,13,511 5of15 ing vibration due to secondary amide i”
Endophytic Bacteria Enterobacter hormaechei Fabricated Silver Nanoparticles and Their Antimicrobial Activity DOI: 10.3390/pharmaceutics13040511 -
Acetate 信頼度 1.0
“cm-1 the positive loading in the C-H stretch region (centered (1255-1208 , 1096-1073 , and 1054-1000 ), cm-1 C-O ) and the vibrations associated with at 2834 and the ratios for the integrated areas for functional groups Evidence-Based Compl”
Tiamyom 等 - 2019 - The Effects of Cordyceps sinensis (Berk.) Sacc. an DOI: 10.1155/2019/5370473 -
信頼度 1.0
“The FTIR spectrum of pure APR showed characteristic peaks at 2943, 2893, and 2834 cm-1 cm-1 (C=O (C=C (N-H stretching);”
Design and Characterization of Phosphatidylcholine-Based Solid Dispersions of Aprepitant for Enhanced Solubility and Dissolution DOI: 10.3390/pharmaceutics12050407 -
信頼度 0.8
“Described as hydrogen related IR absorption peak.”
Investigation of bonded hydrogen defects in nanocrystalline diamond films grown with nitrogen/methane/hydrogen plasma at high power conditions DOI: 10.1016/j.jcrysgro.2016.12.050
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