What absorbs at 2010 cm⁻¹ in an FTIR spectrum?
A band near 2010 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 2010 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 |
|---|---|---|---|
| Alkyl C-H | 3 | 2 | 1.0 |
| Adsorbed carbon monoxide | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Nitrile | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Silicon hydride | 1 | 1 | 0.5 |
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 |
|---|---|---|---|
| lignin | 2010, 1035, 1510 | Alkyl C-H | 1 |
| CO | 2010, 1670, 1620 | Adsorbed carbon monoxide, Alkyl C-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 2010 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
-
Alkyl C-H 置信度 1.0
“The bands located at ~2890 ~2010 cm-1 cm-1 and ~1640 are due to the stretching vibration of C-H, and CH groups, associated”
Oxygen vacancies and F+ centre tailored room temperature ferromagnetic properties of CeO2 nanoparticles with Pr doping concentrations and annealing in hydrogen environment DOI: 10.1016/j.jallcom.2020.156079 -
置信度 1.0
“medium without fungi showed a strong peak broadening at cm-1, 3,270-3,335 indicating the overlap of N-H and O-Hrelated peaks (Oprea, 2010).”
Khruengsai 等 - 2022 - Biodegradation of Polyester Polyurethane by Embarr DOI: 10.3389/fmicb.2022.874842 -
C c single bond 置信度 1.0
“1 illustrates the multispectrum fit region from 2010 moment for the vibrational band and is the non-rigid rotor FZ[1Cc cmK1 2m2Cc 3m3)], 1mCc c c to 2250 factor defined by where 1, covering both the P and R branch lines (in our 2 0Z”
Mantz 等 - 2005 - A multispectrum analysis of widths and shifts in t DOI: 10.1016/j.molstruc.2004.11.094 -
C c single bond 置信度 1.0
“Appearance of new peaks at cm(cid:3)1 due to C-C appearance of shoulder peak at 2010 cm(cid:3)1 and disappearance of peaks at 2010, 767 and 1556 stretching of PEO.”
Influence of high and low dielectric constant plasticizers on the ion transport properties of PEO: NH4HF2 polymer electrolytes DOI: 10.1177/0954008319894043 -
Adsorbed carbon monoxide 置信度 1.0
“The intensity of the 2010 band increases after annealing the sample to 165 K and concomitant desorption of part of the adsorbed CO.”
Abbet 等 - 2001 - Identification of defect sites on MgO(100) thin fi DOI: 10.1021/ja0157651 -
置信度 1.0
“This band shows a shoulder at 2010 assigned by Bazin et al.”
Upgrading the PtCu intermetallic compounds: The role of Pt and Cu in the alloy DOI: 10.1016/j.cattod.2019.11.026 -
置信度 1.0
“Deformation of the C-H linkages in the methyl group of O-acetyl moieties Hemicellulose (Mohebby, 2010) 1230-1235 C=O/C-O linkages stretching vibrations (Mohebby, 2010) Hemicellulose”
Dinant 等 - 2019 - Synchrotron FTIR and Raman spectroscopy provide un DOI: 10.1093/jxb/ery396 -
Nitrile 置信度 1.0
“One can also notice that the C 2H tal columns, respectively, as measured by IASI and averaged 2 and HCN peaks are higher in 2010.”
Duflot 等 - 2015 - Acetylene (C2H2) and hydrogen cyanide (HCN) from I DOI: 10.5194/acp-15-10509-2015
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