What absorbs at 486 cm⁻¹ in an FTIR spectrum?
A band near 486 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 486 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 |
|---|---|---|---|
| Metal oxygen | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Borate | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| N n 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 |
|---|---|---|---|
| PVA | 486, 1660, 2930 | Methacrylate, C-O single bond, Methoxy (OCH3) | 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 486 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
-
N n bond 置信度 1.0
“(n n cm-1 845 and 971 and are due to stretching vibrations of SiO and 3) and bands at 486 and N 4 1 A (n n cm-1 682 are due to bending vibrations of O-Si-O and 4) [30, 31].”
Driving the photoluminescent and structural properties of X2-Y2SiO5 by varying the dopant Dy3+ concentration towards cool wLED applications DOI: 10.1016/j.solidstatesciences.2017.05.008 -
Alkyl C-H 置信度 1.0
“stretching and the N-H amines group was observed in peak assigned at 1516-1616 The 485 presence of cell wall polysaccharide (C-H) due to aliphatic stretching was observed at peak 1442 486 cm-1.”
Singh 等 - 2017 - Comprehensive characterization of lignocellulosic DOI: 10.1016/j.renene.2016.11.039 -
置信度 1.0
“The two peaks located at 486 and 592 may be The absorbance (A) of the various PVA-ZnO nanocomascribed to the defects of the oxygen atom for ZnO NPs or posites versus the incident wavelength is shown in Fig.”
Improvement of Optical Properties of Functionalized Polyvinyl Alcohol-Zinc Oxide Hybrid Nanocomposites for Wide UV Optoelectronic Applications DOI: 10.1007/s10904-023-02616-w -
置信度 1.0
“Prominent Raman shifts of norfloxacin 1500-1450 O-C-O group of acid υ stretching vibration of s 485.6 Strong δ aliphatic chain and C-N the O-C-O group”
Sahoo 等 - 2012 - FTIR and Raman Spectroscopic Investigations of a N DOI: 10.4103/0975-1483.100017 -
置信度 1.0
“The Raman band at 486 and 498 are the 3, s(O-C-O) mode in the lead oxalate, the 854 cm-1 cm-1 cm-1 ν ν(C-C), ν ν and 891 band are assigned to the 2, 1436 and 1478 are assigned to the 1, s(C-O), and”
Removal mechanism of Pb(II) by Penicillium polonicum: immobilization, adsorption, and bioaccumulation DOI: 10.1038/s41598-020-66025-6 -
置信度 1.0
“The band at 486 corresponds to the Cu-O stretching vibration.”
Ultrahigh-Pressure Preparation and Catalytic Activity of MOF-Derived Cu Nanoparticles DOI: 10.3390/nano11041040 -
置信度 1.0
“cm-1, cm-1, cm-1 cm-1 While, Ag NPs showed peaks at 486 1,309 2,340 and 3,714 and matched well with the published literature (Rashmi et al., 2020).”
Augmented anticancer effect and antibacterial activity of silver nanoparticles synthesized by using Taxus wallichiana leaf extract DOI: 10.7717/peerj.14391 -
Borate 置信度 1.0
“3 cm-1 877, 1012, and 1274 cm-1, where peaks at 258, 271, 391, 408, 425, 648, 854, 877 cm-1 are assigned to BO3 peaks at 486, 1012, 1274 are assigned to BO [24-28].”
Development of FTIR Spectroscopy Methodology for Characterization of Boron Species in FCC Catalysts DOI: 10.3390/catal10111327
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