What absorbs at 892 cm⁻¹ in an FTIR spectrum?
A band near 892 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 6 cited sources
Quick answer
A band near 892 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 |
|---|---|---|---|
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| C-S single bond | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Lignin | 1 | 1 | 0.9 |
| Ring structure | 1 | 0 | 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 |
|---|---|---|---|
| chitosan | 892, 1650, 1655 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| cellulose | 892, 1735, 1650 | 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 892 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
-
Metal oxygen 置信度 1.0
“3 cm-1 α-Fe (525) and 480 (443) corresponding to Fe-O vibrations in 2O [28,34] and IR 3 cm-1 α-FeOOH bands at 892 and 792 are diagnostic for OH bending modes in [28,37].”
Parikh 等 - 2014 - ATR-FTIR spectroscopic evidence for biomolecular p DOI: 10.1016/j.colsurfb.2014.04.022. -
C-S single bond 置信度 1.0
“LLM confirmed rule peak-group candidate”
Tasci 等 - 2016 - Determination of alliin and allicin in the plant o DOI: 10.17660/ActaHortic.2016.1143.19 -
Alkyl C-H 置信度 1.0
“The bands at 1429 cm-1, 1163 cm-1, 1032 cm-1, and 892 cm-1 are attributed to C-H bending and C-O-C stretching of β-linked glucose subunits.”
Transformation of Oil Palm Waste-Derived Cellulose into Solid Polymer Electrolytes: Investigating the Crucial Role of Plasticizers DOI: 10.3390/polym13213685 -
Phosphate (PO4) 置信度 1.0
“P-O stretching vibrations appeared at 892, 936 and 992 Si-O and Si = O stretching cm-1, cm-1.”
Molecular and biological activities of metal oxide-modified bioactive glass DOI: 10.1038/s41598-023-37017-z -
置信度 0.95
“Explicit assignment: characteristic Se-O absorption peak at 892 cm-1.”
A novel synthetic chitosan selenate (CS) induces apoptosis in A549 lung cancer cells via the Fas/FasL pathway DOI: 10.1016/j.ijbiomac.2020.05.016 -
Lignin 置信度 0.9
“Explicitly stated as primary lignin peak.”
Aytin 等 - 2022 - Chemical, Hygroscopic, and Mechanical Properties o DOI: 10.15376/biores.17.1.785-801
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