What absorbs at 2210 cm⁻¹ in an FTIR spectrum?
A band near 2210 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
Quick answer
A band near 2210 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
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。
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 2210 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
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Alkyl C-H 置信度 1.0
“cm-1 and 2611.01 >3000 (Medium) Alkane (C-H Stretching) 2715.39 2879.43cm-1 and2868.32cm-1 ±2860cm-1 Alkane(C-HStretching) (Medium) 2210.28cm-1 ±2200cm-1 Alkyne(C≡CStretching) (Medium) cm-1 cm-1 2935.05 ±2935 (Medium) Alkane (C-H Stretching”
Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985 -
Nitrile 置信度 1.0
“cm(cid:2)1 An absorption band at 2210 is assigned to the (cid:1),(cid:4)-unsaturated ™C§N stretching frequency of an nitrile”
Tran 等 - 2003 - The photochemical formation of a Titan haze analog DOI: 10.1016/S0019-1035(02)00069-6 -
Nitrile 置信度 1.0
“cm-1 and C=C and C=N bonds at ~1580 There is one peak presence at ~2210 bonds are located at ~1360 e ce m which is attributed to nitrile band [14].”
Aziz 等 - 2013 - Effect of RF Power and Annealing on Chemical Bondi DOI: 10.1063/1.4858641 -
Nitrile 置信度 0.9
“Explicit assignment: 'characteristic vibration of nitrile groups from TCNEO at 2210 cm-1'.”
Peng 等 - 2013 - Functionalization of Graphene with Nitrile Groups DOI: 10.1155/2013/841789
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