What absorbs at 408 cm⁻¹ in an FTIR spectrum?
A band near 408 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
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 |
|---|---|---|---|
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 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。
这些分配背后的文献
-
Silicon-oxygen (Si-O) 置信度 1.0
“α-Fe 295 2O 3 330 O-Si-O deformation vibration 408 Si-O-Si bending vibration”
Wu 等 - 2022 - Comparison of Natural and Dyed Fire Opal DOI: 10.3390/cryst12030322 -
Acetate 置信度 1.0
“vibration showed a band at 408 In contrast to IR spectra, C-O bond ester vibrations in PLA were weak, cm-1 and the Raman bands with maxima at 1043 and 1128 were associated with C-CH vibrations.”
Optical photothermal infrared spectroscopy with simultaneously acquired Raman spectroscopy for two-dimensional microplastic identification DOI: 10.1038/s41598-022-23318-2 -
Acetate 置信度 1.0
“408 cm-1, and C-O-C + C-CH3 vibration assigned to 302-315 cm-1.”
Impact of the Fused Deposition (FDM) Printing Process on Polylactic Acid (PLA) Chemistry and Structure DOI: 10.3390/app7060579 -
Metal oxygen 置信度 1.0
“-1 The spectra of vine black show additional bands at 224, 243 and 290 cm due to -1 symmetric bending of the Fe-O bond, bands at 408, 495, 608 and 659 cm due to symmetric and asymmetric vibrational modes of Fe-O bond [61] and bands at”
Lluveras-Tenorio 等 - 2019 - A multi-analytical characterization of artists' ca DOI: 10.1007/s10973-019-08522-z
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