What absorbs at 1223 cm⁻¹ in an FTIR spectrum?
A band near 1223 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 1223 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.
可能性のある官能基アサイン
| 官能基 | 裏付け事実 | 引用元 | 最高信頼度 |
|---|---|---|---|
| Methoxy (OCH3) | 6 | 6 | 1.0 |
| Methacrylate | 6 | 6 | 1.0 |
| C-O single bond | 6 | 6 | 1.0 |
| Acetate | 6 | 6 | 1.0 |
| Amide | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
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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 1223 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.
これらのアサインの根拠となる文献
-
Aromatic ring 信頼度 1.0
“cm-1, 2950 to 2840 the aromatic ring CH band at cm-1, cm-1 1223 and a peak near 490 (Fig.”
Calderon 等 - 2011 - Chemical Differences in Soil Organic Matter Fracti DOI: 10.2136/sssaj2009.0375 -
Acetate 信頼度 1.0
“The 1223 band was assigned to C-O vibrations.”
Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569 -
N-O bond 信頼度 1.0
“3 here) The IR spectrum of original sPS film showed that there is no absorption at 1223 cm-1 which is one of the characteristic trans planar conformation bands of mesophase.”
Investigation on the overlapping bands of sydiotactic polystyrene by using 2D-IR spectroscopy DOI: 10.1016/j.molstruc.2016.03.103 -
Acetate 信頼度 1.0
“Addition it is observed by an increase of intensity of and 1223cm-1, C-O of 6% pMDI resulted in less weight less than the addition of respectively, by absorptions at 1700 and 2% pMDI and 4% pMDI, in the temperature range between increasing”
El-Shekeil 等 - 2012 - Effect of pMDI isocyanate additive on mechanical a DOI: 10.1177/0021998310385030) -
Acetate 信頼度 1.0
“C=O bending in carboxylic esters and the band at 1223 In particular, silver does exist in nature especially in leadascribable to C-O stretching in carboxylic esters (Bonizzoni based ores, so that its production as pure metal required cuet a”
The combined use of SEM-EDX, Raman, ATR-FTIR and visible reflectance techniques for the characterisation of Roman wall painting pigments from Monte d’Oro area (Rome): an insight into red, yellow and pink shades DOI: 10.1007/s11356-021-15085-w -
Acetate 信頼度 1.0
“cm-1 Furthermore, PC1 was also negatively correlated with the regions at 2929 and 2854 (Ccm-1 H of aliphatic methylene), 1223 (C-O stretching and CH deformation in polysaccharides and lignin, N-H rocking and C-O stretching in amino acids, A”
Huang 等 - 2021 - Prediction of biochemical methane potential of urb DOI: 10.1016/j.scitotenv.2021.147959 -
Hydroxyl (O-H) 信頼度 1.0
“The peaks between ( cm-1 e 1222.87 and 1145.72 confirmed -OH functional 0.25 c n group of adsorbed moisture and peaks between 1078.21”
Synthesis, characterization and application of novel 1, 3-bis[(furan-2-l)methylene]thiourea functional dye on wool and cotton fabrics DOI: 10.1007/s42452-020-03653-7 -
Acetate 信頼度 1.0
“Additionally, a strong and intense band given by the cm-1 phenolic C-O stretching between 1223 and 1208 was detected [5,24-28,30].”
What about Phenol Formaldehyde (PF) Foam in Modern-Contemporary Art? Insights into the Unaged and Naturally Aged Material by a Multi-Analytical Approach DOI: 10.3390/polym13121964
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