What absorbs at 862 cm⁻¹ in an FTIR spectrum?
A band near 862 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 8 cited sources
Quick answer
A band near 862 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 |
|---|---|---|---|
| Methacrylate | 3 | 3 | 1.0 |
| C-O single bond | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Carbonate | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Borate | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Hydrogen 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 |
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 |
|---|---|---|---|
| starch | 862, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 1 |
| cotton fabric | 862, 900, 2000 | Methacrylate, Acetate, C-O single bond | 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 862 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
-
C-O single bond 信頼度 1.0
“LLM confirmed rule peak-group candidate”
Two potential uses for silver nanoparticles coated with Solanum nigrum unripe fruit extract: Biofilm inhibition and photodegradation of dye effluent DOI: 10.1016/j.micpath.2017.08.039 -
Metal oxygen 信頼度 1.0
“The absorption band at around 742 and strong cm-1 4]2band at 862 are attributed to the O-W-O stretches of the [WO tetrahedron, because the”
Abozaid 等 - 2018 - Characterization of Neodymium Doped Calcium Tungst DOI: 10.2298/SOS1804445A -
Acetate 信頼度 1.0
“at 862 and 879 Both bands could be assigned to C=O vibration in carbonate 879 cm-1.”
Impact of NaOH Concentration on Deweaving of Cotton Fabric in Aqueous Solutions DOI: 10.3390/su13042015 -
Acetate 信頼度 1.0
“cm-1 cm-1 stretching, 1485 to the CH bending of an alkyl group, 1150 to the C-O stretching 2 6 ACCEPTED MANUSCRIPT cm-1 C-N+ of an aliphatic ketone group, and 862 to a symmetric stretching.”
Delgado-Mellado 等 - 2018 - Thermal stability of choline chloride deep eutecti DOI: 10.1016/j.molliq.2018.03.076 -
Acetate 信頼度 1.0
“skeletal stretch glyceraldehyde, 860.83, 764.60, 930.25, 709.34 glucopyranoside OH, C=O stretch, OH bend, Citric acid L (-)-glyceraldehyde, Glycerol 3368.50, 2932.94, 2058.91, CH 2, OH bond scissoring, molecule substitution anhydrous phosph”
Influence of physical and chemical modifications on granule size frequency distribution, fourier transform infrared (FTIR) spectra and adsorption isotherms of starch from four yam (Dioscorea spp.) cultivars DOI: 10.1007/s13197-021-05200-7 -
Alkene (C=C) 信頼度 1.0
“The peaks at 862.12 cm-1 and 810.04 cm-1 correspond to =C-H during production and transportation.”
Evaluating the Effect of Hydrophobic Nanosilica on the Viscoelasticity Property of Asphalt and Asphalt Mixture DOI: 10.3390/ma11112328 -
信頼度 1.0
“cm-1 strong yet narrow peak at 530.42 due to wellThe infrared spectrum of n-hexane fraction cm-1 defined absorption for the halogen-substituted of Inflorescence showed, 719.45 and 862.18 cm-1 cm-1 aromatic compound.”
Ishtiaq 等 - 2020 - Antioxidant potential and chemical characterizatio DOI: 10.1590/0001-3765202020190387 -
Borate 信頼度 1.0
“Therefore, the bands cm-1 appearing in the region 862-1155 were due to the vibrations of the B-O bond stretching of BO structural units, which were overlapped with phosphate bands [23].”
The Influence of CoO/P2O5 Substitutions on the Structural, Mechanical, and Radiation Shielding of Boro-Phosphate Glasses DOI: 10.3390/ma14216632
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