What absorbs at 532 cm⁻¹ in an FTIR spectrum?
A band near 532 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 532 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 14 | 12 | 1.0 |
| Methacrylate | 10 | 9 | 1.0 |
| Acetate | 10 | 9 | 1.0 |
| C-O single bond | 8 | 8 | 1.0 |
| Carbonyl (C=O) | 8 | 7 | 1.0 |
| Methoxy (OCH3) | 7 | 7 | 1.0 |
| Carboxyl (COOH) | 7 | 6 | 1.0 |
| Phosphate (PO4) | 6 | 6 | 1.0 |
| Metal oxygen | 6 | 6 | 1.0 |
| Amide | 6 | 5 | 1.0 |
| Ketone | 5 | 4 | 1.0 |
| Ester | 5 | 4 | 1.0 |
| Silicon-oxygen (Si-O) | 5 | 4 | 1.0 |
| Silicon (Si) | 5 | 4 | 1.0 |
| Siloxane (Si-O-Si) | 3 | 3 | 1.0 |
| Phosphorus | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Carbon bromine | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 1 | 1.0 |
| Amine primary | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Lignin | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Metal hydroxyl | 1 | 1 | 1.0 |
| C-S single bond | 1 | 1 | 1.0 |
| S s | 1 | 1 | 0.8 |
| Sulfur | 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
| 素材 | 補助ピーク | Overlapping groups | 引用元 |
|---|---|---|---|
| polyaniline | 532, 1565, 1570 | Methacrylate, Acetate | 1 |
| copolymer | 532, 2921, 1540 | Hydroxyl (O-H), Methacrylate, Acetate | 1 |
| polypropylene | 532, 1030, 1600 | Methacrylate, Acetate, Hydroxyl (O-H) | 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 532 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
“XPS analysis 31 32 revealed a characteristic peak of Ru 3d at 285 eV as well as a peak at 531.6 eV that was attributed 33 34 to O1s in Ti-O-C bonds.”
Surface Grafting of Ru(II) Diazonium-Based Sensitizers on Metal Oxides Enhances Alkaline Stability for Solar Energy Conversion DOI: 10.1021/acsami.7b16641 -
C-S single bond 信頼度 1.0
“Copolymer (aqueous) (cm-1) (cm-1) Functional group Wave number Functional group Wave number S bending 762 C S stretching 532 C”
Dey Sadhu 等 - 2020 - Preparation and characterization of polyanilinea DOI: 10.1002/pc.25738 -
Metal hydroxyl 信頼度 1.0
“cm-1 1635 3433 and 3749 Ammoand 2018), then the wavenumber of 470.63 cm-1 denoted as the Al-Al-OH vibrations nium ions have inserted inside the layer of ben532.35 cm-1 due to has bet- (Zaher MS et al., 2018).”
Hakim 等 - 2023 - Ammonium-Assisted Intercalation of Java Bentonite DOI: 10.12911/22998993/156665 -
Aromatic ring 信頼度 1.0
“As cm-1 a peak at 532 indicated the peak that is out of plane aromatic C-H deformation [13, 14].”
Synthesis and characterization of Heck-cross coupling 4-(4-nitrostyryl) aniline as potential precursor in Schiff-base synthesis DOI: 10.1063/1.5002293 -
Carboxyl (COOH) 信頼度 1.0
“The peaks observed in CoO Patel.[46] The C showed peaks at 531.6eV, indicating the presence of MgO XPS correspond with the data reported by sp2 carbon, (1s) peak in Figure 5b at 284.0eV, illustrates the before and after calcination.”
Kgosiemang 等 - 2020 - Green synthesis of magnesium and cobalt oxide nano DOI: 10.1080/24701556.2020.1735422 -
信頼度 1.0
“6d) was deconvoluted into two peaks at 530.87eV and 531.89eV sp2 symmetry) and G band is due to bond stretching movement of which refers to Ti-O metallic bond and oxygen residual bonding at the carbon pair in aromatic ring [41].”
Effect of co-sensitization in solar exfoliated TiO2 functionalized rGO photoanode for dye-sensitized solar cell applications DOI: 10.1016/j.mssp.2019.02.027 -
Carbonyl (C=O) 信頼度 1.0
“It is impossible to onlyhasalittlechangewithonlythefringeturningblack.ThePP/ 23wt% IFR/2wt% FePP does not turn black completely until distinguish inorganic and organic oxygen because the O1s band -- 700sec.Thereasonforchangeincolormaybeduet”
Synergistic effects of ferric pyrophosphate (FePP) in intumescent flameretardant polypropylene DOI: 10.1002/pat.1590 -
Amide 信頼度 1.0
“The O 1s peak at 530 eV representing C-O group of alcoholic and ether can be fitted into peaks at 529.1eV showing C-O [26] and 531.7 eV showing C=O [27] peaks of lignin, cellulose and hemicellulose.”
Enhanced arsenic (iii) adsorption from aqueous solution by magnetic pine cone biomass DOI: 10.1016/j.matchemphys.2018.09.067
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