What absorbs at 469 cm⁻¹ in an FTIR spectrum?
A band near 469 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 469 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 4 | 4 | 1.0 |
| Siloxane (Si-O-Si) | 3 | 3 | 1.0 |
| Silicon (Si) | 3 | 3 | 1.0 |
| Phosphate (PO4) | 2 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| N h | 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 |
|---|---|---|---|
| hematite | 469, 1030, 938 | Silicon-oxygen (Si-O), Siloxane (Si-O-Si), Silicon (Si) | 1 |
| kaolinite | 469, 3696, 693 | Silicon-oxygen (Si-O), Silicon (Si), Siloxane (Si-O-Si) | 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 469 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
-
置信度 1.0
“by cm-1 Si-O symmetrical stretching vibration to 801 value of wavenumber and Si-O cm-1 wavenumber.37 asymmetrical bending vibration to 469 value of At relative cm-1 high doses of radiation at 687 value of wavenumber, a new peak appears and”
Huseynov 等 - 2018 - Fourier transform infrared spectroscopic study of DOI: 10.1142/S0217979218500741 -
置信度 1.0
“The peaks around 469 and 3098cm(cid:2)1 are attributed to the N LVM [13], and the As stretch mode of N-H [10], respectively.”
Nishimura 等 - 2007 - Electrical properties of GaAsN film grown by chemi DOI: 10.1016/j.physb.2007.08.183 -
Alkene (C=C) 置信度 1.0
“LLM confirmed rule peak-group candidate”
Patoka 等 - 2016 - Nanoscale plasmonic phenomena in CVD-grown MoS2 mo DOI: 10.1364/OE.24.001154 -
置信度 1.0
“Peaks found at 446, 452, between 400 and 4,000 O-H 3,691 3,708 3,720 stretching vibrations 469cm-1 highfor three samples can be related to the high-frequency frequency Au mode of CuO;”
Saleem 等 - 2022 - Enhancement in structural, morphological, and opti DOI: 10.1515/ntrev-2022-0473 -
Silicon (Si) 置信度 1.0
“cm-1 cm-1 and 469 were attributed to the antisymmetric stretching vibration, symmetric stretching 469 were attributed to the antisymmetric stretching vibration, symmetric stretching vibration cm-1 cm-1 and 469 were attributed to the antisym”
Ding 等 - 2018 - The Preparation of Nano-SiO2Dialdehyde Cellulose DOI: 10.3390/polym10050550 -
Phosphate (PO4) 置信度 1.0
“A low cm-1 cm-1 and the double bands at 564 and 604 belong to bending vibrations of P-O (υ intensity band at 469”
Esfahani 等 - 2016 - Structural and morphological analysis of zinc inco DOI: 10.1590/S1517-707620160003.0055 -
置信度 1.0
“(Si-O-Al stretching vibration), 938 and 912 (Al-OH deformation vibration), 693 (Si-O-Si stretching vibration), 1008 cm-1 (Si-O-Al stretching vibration), 938 and 912 cm-1 (Al-OH deformation cm-1 cm-1 symmetrical bending vibration), 538 (Si-O”
Ma 等 - 2019 - Investigation of the Optical, Physical, and Chemic DOI: 10.3390/su11143803 -
Silicon (Si) 置信度 1.0
“The characterisitc band at 469 is attributed to the TO (T Si or Al) tetra4 structure35.”
Zeolite RHO Synthesis Accelerated by Ultrasonic Irradiation Treatment DOI: 10.1038/s41598-019-51460-x
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