What absorbs at 3233 cm⁻¹ in an FTIR spectrum?
A band near 3233 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 3233 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.
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Acetate | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
Possible materials
| 材料 | 支持峰 | Overlapping groups | 引用来源 |
|---|---|---|---|
| TiO2 | 3233, 1700, 1093 | Hydroxyl (O-H), Alkyl C-H, Acetate | 1 |
| ZnO | 3233, 1400, 3430 | Hydroxyl (O-H), Alkyl C-H, Acetate | 1 |
| TiO | 3233, 1730, 1699 | Alkyl C-H, Hydroxyl (O-H), Acetate | 1 |
| HCl | 3233, 1708, 1032 | Hydroxyl (O-H), Acetate | 1 |
| TiO2 nanoparticles | 3233, 1700, 455 | Hydroxyl (O-H), Alkyl C-H, Acetate | 1 |
| zinc oxide nanoparticles | 3233, 1744, 1627 | Acetate, Alkyl C-H, 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 3233 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.
这些分配背后的文献
-
Hydroxyl (O-H) 置信度 1.0
“The formulated candelilla, which is a mixture of glyceryl stearate and lesser amounts of natural waxes, also exhibits the strong and wide bands associated with the OH stretching vibrations at 3296 and 3233 cm-1 and the band due to the C-O s”
Characterization of Waxes in the Roman Wall Paintings of the Herculaneum Site (Italy) DOI: 10.3390/app122111264 -
Alkene (C=C) 置信度 1.0
“FTIR spectra peak represents a high-intensity broadband around cm-1 3233 due to stretching alkenyl group made of zinc acetate Fourier Transforms Infrared salts and their reduction of ZnO NPs.”
Gupta 等 - 2018 - Effective Antimicrobial Activity o Green ZnO Nano DOI: 10.3389/fmicb.2018.02030 -
Hydroxyl (O-H) 置信度 0.95
“Explicit assignment: stretching vibration of -OH groups.”
Developing Further Versatility in Benzoxazine Synthesis via Hydrolytic Ring-Opening DOI: 10.3390/polym12030694 -
置信度 0.9
“Same as above.”
Radoman 等 - 2015 - Effect of surface modified TiO2 nanoparticles on t DOI: 10.3144/expresspolymlett.2015.83
是否有此波段的光谱？
上传您的FTIR光谱，几秒钟内即可获得完整的解读报告——包含带文献引用的峰分配、库匹配和带有置信度评级的证据链。