What absorbs at 1009 cm⁻¹ in an FTIR spectrum?
A band near 1009 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 1009 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.
Possíveis atribuições de grupos funcionais
| Grupo funcional | Fatos de suporte | Fontes citadas | Maior confiança |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 4 | 4 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Hydrogen bond | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| S eq o | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicate | 1 | 1 | 0,8 |
A classificação reflete a evidência acumulada da literatura, não uma única regra autoritária. Sempre confirme com o contexto da sua amostra.
Possible materials
| Material | Picos de suporte | Overlapping groups | Fontes citadas |
|---|---|---|---|
| alginate | 1009, 1100, 1715 | Hydroxyl (O-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 1009 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.
Literatura por trás destas atribuições
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confiança 1,0
“3.3 Topographical analysis Si-O-Si modes.20 breathing The spectra display asymmetric cm(cid:1)1, stretching at 1009 which corresponds to the presence of The topographical investigation of pristine the PC, PC/FAC and PC/GFACwerestudiedbyAFM.”
Thin film encapsulation of nano composites of polycarbonate (PC) for thermal management systems DOI: 10.1039/c4ra10183a -
Hydrogen bond confiança 1,0
“The strong peak at 1008.59 cm-1 in AV and 1012.45 in PAV was related to strong intramolecular hydrogen bonding of hydroxyl groups.”
Synthesis and characterization of eco-friendly bioplastic from low-cost plant resources DOI: 10.1007/s42452-019-1460-x -
Acetate confiança 1,0
“(2012) show that the shown that changes in chemical composition, includcm-1 peak in wave number between 1009 and 1050 is ing pigment, often precedes the appearance of disease a result of stretching vibrations of C-O and C-C symptoms (Erukhi”
Use of thermal imaging and Fourier transform infrared spectroscopy for the pre-symptomatic detection of cucumber downy mildew DOI: 10.1007/s10658-019-01775-2 -
S eq o confiança 1,0
“The peaks at 1009 and 799 show S=O stretching of DBSA and cm-1 benzenoid rings.”
Zainuri 和 Amalia - 2017 - The Microstructure Analysis of Barium MHexaferri DOI: 10.1088/1757-899X/196/1/012015 -
Acetate confiança 1,0
“Finally, a band representing cm-1) the C-O stretching bonds (1009 was observed.”
Encapsulation of Cochleates Derived from Salmonella Infantis with Biopolymers to Develop a Potential Oral Poultry Vaccine DOI: 10.3390/polym13193426 -
Carbonate confiança 1,0
“cm-1 cm-1 Along with the strong bands at 873 and 712 due to calcite and those at 1032, 1009 of Along with the strong bands at 873 and 712 cm-1 due to calcite and those at 1032, 1009 cm-1 of”
Pigments on Roman Wall Painting and Stucco Fragments from the Monte d’Oro Area (Rome): A Multi-Technique Approach DOI: 10.3390/app10207121 -
Silicon (Si) confiança 1,0
“On addition of ZnHNTs more pronounced 913cm-1 peaks were observed at 1009 and respectively corresponding to in-plane Si-O A”
3D printed antimicrobial PLA constructs functionalised with zinc- coated halloysite nanotubes-Ag-chitosan oligosaccharide lactate DOI: 10.1080/10667857.2020.1806188. -
Hydrogen bond confiança 1,0
“(1076 and (1217 In the blend, the first two of these vibrations are (1009 cm-1) cm-1) peaks are shifted to lower frequencies (1079 and (1219 due to the hydrogen bonding between the hydrogen attached to the sulfonic group of SPEEK and the ni”
Maab 等 - 2009 - SPEEKPolyimide Blends for Proton Conductive Membr DOI: 10.1002/fuce.200800121
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