What absorbs at 1117 cm⁻¹ in an FTIR spectrum?
A band near 1117 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
Răspuns rapid
A band near 1117 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.
Atribuiri posibile ale grupelor funcționale
| Grup funcțional | Fapte suport | Surse citate | Încredere maximă |
|---|---|---|---|
| C-O single bond | 15 | 14 | 1,0 |
| Methacrylate | 13 | 12 | 1,0 |
| Acetate | 13 | 12 | 1,0 |
| Methoxy (OCH3) | 12 | 11 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Fatty acid | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 1 | 1,0 |
| Silicon (Si) | 2 | 1 | 1,0 |
| Boron nitrogen | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
Clasamentul reflectă dovezile acumulate din literatură, nu o singură regulă autoritară. Confirmați întotdeauna în contextul mostrei dvs.
Materiale posibile
| Material | Vârfuri suport | Grupuri suprapuse | Surse citate |
|---|---|---|---|
| ZnO | 1117, 1400, 3430 | Acetate, Methacrylate, C-O single bond | 1 |
| ZnO nanoparticles | 1117, 1219, 1726 | Methacrylate, Acetate, C-O single bond | 1 |
| chitosan | 1117, 1650, 1655 | Acetate, Methacrylate, C-O single bond | 1 |
| zinc oxide nanoparticles | 1117, 1744, 1627 | Acetate, Methacrylate, Methoxy (OCH3) | 1 |
| PMMA | 1117, 1722, 1383 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
Materialele sunt afișate numai atunci când același grup de literatură susține această bandă și cel puțin un vârf caracteristic suplimentar.
Logica spectrului
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 1117 cm⁻¹ is usually not enough for material identification by itself.
Utilizare în condiții reale
Acest tip de interogare este comun în identificarea polimerilor, screeningul materialelor plastice necunoscute, depanarea QC, verificarea materialelor reciclate și revizuirea atribuirii vârfurilor bazată pe literatură.
Greșeli comune
- Tratarea unei benzi izolate ca dovadă a unui material fără a verifica cel puțin unul sau două vârfuri de susținere.
- Ignorând suprapunerea: mai multe grupuri funcționale pot contribui în apropierea aceluiași număr de undă.
- Omiterea validării atunci când aditivii, amestecurile, oxidarea sau contaminarea pot distorsiona spectrul.
Sfat de verificare
Când ambiguitatea rămâne, validați ipoteza prin DSC, GC-MS sau TGA, în special pentru amestecuri, probe degradate și polimeri umpluți.
Literatura din spatele acestor atribuiri
-
Hydroxyl (O-H) încredere 1,0
“The peaks at 3451.963 cm-1 correspond to O-H stretching and and 1116.503 deformation, respectively, assigned to the water adsorption on the metal surface [23].”
Farhat 等 - 2018 - Synthesis and Characterization of Er-Doped Nano Zn DOI: 10.1007/s10948-017-4548-9 -
Acetate încredere 1,0
“1034.74 1034.74 C-O stretch, C-N stretch twisting, C-O-C stretch1116.71 1155 1174.57 1171.68 CH 2 ing C-H ring (in plane bend)”
Ganesan 等 - 2018 - The effect of titanium dioxide nano-filler on the DOI: 10.1007/s10854-018-8815-8 -
C-O single bond încredere 1,0
“identified around 1253 Finally, the sharp peak at 1117cm(cid:1)1 CAOAC can be assigned to stretching within the ether 811cm(cid:1)1”
Development of bioactive fish gelatin/chitosan nanoparticles composite films with antimicrobial properties DOI: 10.1016/j.foodchem.2015.09.004 -
Fatty acid încredere 1,0
“andofsmallchangesintherelativepeakintensity(absorbancies),escm-1 cm-1 pecially at frequency region of about 3007 and 1117 cm-1 Peak area of fatty acid x (Fig.”
The chemometrics approach applied to FTIR spectral data for the analysis of rice bran oil in extra virgin olive oil DOI: 10.1016/j.chemolab.2011.10.010 -
încredere 1,0
“the peak at 1117 attributes to the S-O vibrations of SO and the peaks at 980, 516, cm1 and 463 correspond to the vibrations of Si-O in the gel (Mollah et al., 2000).”
FTIR study on early age hydration of carbon nanotubes modified cement-based materials DOI: 10.1680/jadcr.16.00167 -
Acetate încredere 1,0
“cm-1 cm-1, peaks at 1117 and 1130 that corresponds to CO cm-1 1164 was previously recorded to change in both shape 48 stretching vibration of C-O-P of ribose (RNA).”
Song 和 Kazarian - 2020 - Effect of Controlled Humidity and Tissue Hydration DOI: 10.1021/acs.analchem.0c01002 -
Silicon (Si) încredere 1,0
“A medium band appeared cm-1 cm-1 at 1117 correspond to the apical Si-O vibrations [20-22].”
Souissi 等 - 2022 - Synthesis, Thermal Properties and Electrical Condu DOI: 10.21203/rs.3.rs-1294285/v1 -
Aromatic ring încredere 1,0
“The peak ranging at 1743.65 shows the C-C synthesized ZnO nanoparticles were subjected to IR radiation C=O stretch of the weak amine group and the stretch in cm-1 aromatic ring was discerned by peak at 1116.78 [39].”
Tetraselmis indica Mediated Green Synthesis of Zinc Oxide (ZnO) Nanoparticles and Evaluating Its Antibacterial, Antioxidant, and Hemolytic Activity DOI: 10.1007/s12668-020-00817-y
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