What absorbs at 1134 cm⁻¹ in an FTIR spectrum?
A band near 1134 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 1134 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.
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Methoxy (OCH3) | 5 | 5 | 1,0 |
| Methacrylate | 5 | 5 | 1,0 |
| C-O single bond | 5 | 5 | 1,0 |
| Acetate | 5 | 5 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| S eq o | 2 | 2 | 0,8 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Silicon hydride | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Possible materials
| Материал | Поддерживающие пики | Overlapping groups | Цитируемые источники |
|---|---|---|---|
| cellulose | 1134, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 2 |
| hemicellulose | 1134, 1730, 897 | Methacrylate, Acetate, C-O single bond | 1 |
| kraft lignin | 1134, 1744, 1710 | Methacrylate, Acetate, 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 1134 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.
Литература, лежащая в основе этих назначений
-
Acetate достоверность 1,0
“RPMI peak at 1134 has also appeared representing the C-O commedium was then removedfrom wells and discarded,cells were ponent of an ester bond.”
Broderick 等 - 2006 - The characterisation of a novel, covalently modifi DOI: 10.1016/j.jcis.2005.12.026 -
достоверность 1,0
“-NH O-C at 1103.2 and 1088.1 Weak absorption of aryl appears at 1627 and 1593 cm-1 OTES-APTS polymer shows sharp absorption at 1134.1 and 1033.8 as an asymmetric stretching of -CH Si-O-Si and Si-O-C respectively.”
Wahyuningsih 等 - 2018 - Synthesis of Optode Thin Layer using Sol Gel Hybri DOI: 10.1088/1757-899X/333/1/012021 -
Acetate достоверность 1,0
“Zanoni por contribuições cm-1 éster, grupo C-O-C de atribuídas à banda em 1134 (nC-O-C);”
Barbosa 等 - 2022 - RAPID ASSESSMENT OF TRANSFORMER INSULATING VEGETAB DOI: 10.21577/0100-4042.20170914 -
Acetate достоверность 1,0
“The band observed at 1134 is 9 associated with C-O due to the secondary alcohol, which can show the presence of the functional group of lignin, cellulose,”
Cheng 等 - 2018 - A new approach to improve mechanical properties an DOI: 10.1016/j.conbuildmat.2018.05.134 -
Amide достоверность 1,0
“The FTIR spectrum of the parent NSB-G Department of Genetic Engineering and Biotechnology, Shahjalal Unicm(cid:1)1, S¼O C-N represented the stretching vibrations of at 1134 at versity of Science and Technology, Sylhet-3114, Bangladesh.”
Biodegradation of reactive textile dye Novacron Super Black G by free cells of newly isolated Alcaligenes faecalis AZ26 and Bacillus spp obtained from textile effluents DOI: 10.1016/j.heliyon.2019.e02068 -
Phosphate (PO4) достоверность 1,0
“cm-1 Furthermore, the characteristic peak at 1134 was ascribed to the absorption of -P=O in PCF.”
Polybenzoxazine Resins with Cellulose Phosphide: Preparation, Flame Retardancy and Mechanisms DOI: 10.3390/polym13244288 -
Acetate достоверность 1,0
“The band 1134 are assigned to the immunohistochemistry images of connective tissue in Atlantic cod C-O-S asymmetric stretching vibration in GAGs [40, 46],”
The use of FTIR spectroscopy to characterize connective tissue components in skeletal muscle of Atlantic cod (Gadus morhua L.) DOI: 10.1002/jbio.201800436 -
Alkyl C-H достоверность 1,0
“2013), while the band at 1134 was assigned to CH in-plane deformation (Faix 1991;”
Vidal 等 - 2021 - Sulfomethylation of Radiata Pine Kraft Lignin and DOI: 10.1016/j.biotechadv.2016.10.001
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