What absorbs at 928 cm⁻¹ in an FTIR spectrum?
A band near 928 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 928 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 |
|---|---|---|---|
| Acetate | 4 | 4 | 1.0 |
| Alkyl C-H | 4 | 4 | 1.0 |
| Methoxy (OCH3) | 3 | 3 | 1.0 |
| Methacrylate | 3 | 3 | 1.0 |
| C-O single bond | 3 | 3 | 1.0 |
| Metal oxygen | 2 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 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 |
|---|---|---|---|
| cellulose | 928, 1735, 1650 | Alkyl C-H, Acetate, Methacrylate | 1 |
| hemicellulose | 928, 1730, 897 | Alkyl C-H, Methacrylate, Acetate | 1 |
| SiO2 | 928, 1739, 699 | Alkyl C-H, Methoxy (OCH3) | 1 |
| lignin | 928, 1035, 1510 | Alkyl C-H, Methacrylate, Acetate | 1 |
| biomass | 928, 1082, 1282 | Alkyl C-H, Methacrylate, Acetate | 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 928 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
-
Acetate 信頼度 1.0
“The peak at 927.80 indicates vibrations from C-O stretching”
Mahardiani 等 - 2022 - Nanofiber Fabrication from Palm Fiber Waste for Su DOI: 10.48317/IMIST.PRSM/morjchem-v10i2.32648 -
Alkyl C-H 信頼度 1.0
“The peak located at 928 manufacturers in the tequila region of Amatitán, cm-1 was due to the bending of the C-H bond of the Jalisco, Mexico.”
Mondragon-Cortez 等 - 2022 - Application of Fourier transform infrared spectros DOI: 10.24275/rmiq/Alim2806 -
Alkyl C-H 信頼度 1.0
“The XRD spectrum of Agr shows a peak 19.1◦ ∼ 2θ 1556.6 cm-1 and 1404.6 cm-1, N-H out of plane wagging at 608.8 cm-1, and C-H stretching at 928.2 at with the intensity of 1624 (a.u), which demonstrates the semi-crystalline nature of ∼ at 2θ”
Development of Biodegradable Agar-Agar/Gelatin-Based Superabsorbent Hydrogel as an Efficient Moisture-Retaining Agent DOI: 10.3390/biom10060939 -
Acetate 信頼度 1.0
“Similarly, the C-O stretching at 928 C-H stretching at can replace calcium in body.”
Dubey 等 - 2022 - Investigation of Hazardous Materials in Firecracke DOI: 10.14429/dsj.72.17836 -
Amide 信頼度 1.0
“C-OstretchingandC-OHbending polysaccharides(e.g.,glucose) PO32968 DNAandRNAribose stretching DNAandRNAribose-phosphatechain C-N+-Cstretching 928”
Fourier-Transform Infrared Spectroscopy as a Discriminatory Tool for Myotonic Dystrophy Type 1 Metabolism: A Pilot Study DOI: 10.3390/ijerph18073800 -
Water (H2O) 信頼度 1.0
“cm-1 cm-1, both DFO-B applications, the increased maxima at 1637 and 3342 assigned to as the intensive agarose peaks at 1370cm-1, 1037 cm-1, 928 cm-1, 887 cm-1 and 768 cm-1 were hydroxyls, are probably due to the water absorbed during the a”
Desferrioxamine B: Investigating the Efficacy of Hydrogels and Ethanol Gels for Removing Akaganeite and Maghemite from Dry Wooden Substrates DOI: 10.3390/f14020247 -
Silanol (Si-OH) 信頼度 1.0
“Indeed, the decay processes of atomic Figure sity of Si-OH and H-OH peaks located at wavenumbers → → oxygen such as O + O + N O +N or O + O + surface O around 928 cm-1 and 3400 cm-1.”
Atmospheric Plasma-Enhanced Spatial Chemical Vapor Deposition of SiO 2 Using Trivinylmethoxysilane and Oxygen Plasma DOI: 10.1021/acs.chemmater.0c01148 -
Alkyl C-H 信頼度 1.0
“C-H vibration of aldehyde group C=O 1671 in conjugated carbonyl group Furfural C=C 1465 stretching of furan ring 1276/1021 C-O stretching vibration 928/884/755 C-H bending out of plane peaks”
Zhuang 等 - 2020 - Observation of Potential Contaminants in Processed DOI: 10.3390/app10124345
このバンドを持つスペクトルがありますか？
FTIRスペクトルをアップロードすると、数秒で完全な解釈レポート（文献引用付きピークアサイン、ライブラリマッチ、信頼度評価付き証拠チェーン）を取得できます。