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
Risposta rapida
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.
Possibili assegnazioni di gruppi funzionali
| Gruppo funzionale | Fatti di supporto | Fonti citate | Affidabilità massima |
|---|---|---|---|
| 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 |
La classifica riflette le prove bibliografiche accumulate, non una singola regola autorevole. Conferma sempre nel contesto del tuo campione.
Materiali possibili
| Materiale | Picchi di supporto | Gruppi sovrapposti | Fonti 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 |
I materiali vengono mostrati solo quando lo stesso pool di letteratura supporta questa banda e almeno un picco caratteristico aggiuntivo.
Logica dello spettro
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.
Utilizzo nel mondo reale
Questo tipo di richiesta è comune nell＇identificazione dei polimeri, nello screening di plastiche sconosciute, nella risoluzione dei problemi di controllo qualità, nella verifica dei materiali riciclati e nella revisione dell＇assegnazione dei picchi supportata dalla letteratura.
Errori comuni
- Trattare una banda isolata come prova di un materiale senza verificare almeno uno o due picchi di supporto.
- Ignorando la sovrapposizione: più gruppi funzionali possono contribuire vicino allo stesso numero d＇onda.
- Saltare la convalida quando additivi, miscele, ossidazione o contaminazione possono distorcere lo spettro.
Consiglio di verifica
Quando permangono ambiguità, convalida l＇ipotesi con DSC, GC-MS o TGA, specialmente per miscele, campioni degradati e polimeri caricati.
Letteratura dietro queste assegnazioni
-
Hydroxyl (O-H) affidabilità 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 affidabilità 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 affidabilità 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 affidabilità 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 -
affidabilità 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 affidabilità 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) affidabilità 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 affidabilità 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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