What absorbs at 1129 cm⁻¹ in an FTIR spectrum?
A band near 1129 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 7 cited sources
Quick answer
A band near 1129 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 |
|---|---|---|---|
| C c single bond | 2 | 2 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Sulfonyl | 1 | 1 | 0.9 |
| S eq o | 1 | 1 | 0.9 |
ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。
Possible materials
| 素材 | 補助ピーク | Overlapping groups | 引用元 |
|---|---|---|---|
| polystyrene | 1129, 1020, 1600 | Aromatic ring | 1 |
| diamond | 1129, 1378, 1332 | Aromatic ring | 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 1129 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
-
信頼度 1.0
“These peaks have been cussed in the FTIR section, sample TE309 showed strong band.20,21 Two of the attributed to a tungsten vibronic absorption in the one-phonon region, as was the case for (cid:126)TA1129 NTA1018(cid:33) samples and showed”
Haque 等 - 1998 - Comparison of infrared, Raman, photoluminescence, DOI: 10.1063/1.367201 -
C c single bond 信頼度 1.0
“LLM confirmed rule peak-group candidate”
Application of FTIR and Raman microspectroscopy to the study of food/packaging interactions DOI: 10.1080/02652030903148306 -
C c single bond 信頼度 1.0
“15 linear baseline correction, (ii) normalization according to the area of the LLDPE specific band at 1129 146 16 o 17 cm-1 representing the symmetric C-C stretching of all-trans PE chains.”
Effect of HP/T treatments of in-package food on additive migration from conventional and bio-sourced materials DOI: 10.1080/19440040903268054 -
Aromatic ring 信頼度 1.0
“At the same time, the comparison of spectra yields did cm-1, hemicelluloses appeared at 1736.58 while the aromatic skeletal vibration in lignin not reveal the presence of sulfonate functional groups around 1129 cm-1, which is possibly cm-1.”
Adsorptive Performance of Walnut Shells Modified with Urea and Surfactant for Cationic Dye Removal DOI: 10.3390/w15081536 -
S eq o 信頼度 0.9
“Explicit assignment: 'S=O stretching (1326 and 1129 cm-1)'”
Ektirici 等 - 2022 - Computational Investigation of the Monomer Ratio a DOI: 10.1021/acsomega.2c00862 -
信頼度 0.9
“Text: 'strong peak that is observed at 1129 corresponds to aryl fluoride'”
El-Say 等 - 2015 - Risperidone oral disintegrating mini-tablets A ro DOI: 10.1515/acph-2015-0038 -
Sulfonyl 信頼度 0.9
“Assigned to O=S=O in -SO3H”
Liu 等 - 2019 - Novel Selective Depressant of Titanaugite and Impl DOI: 10.3390/min9110703
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