What absorbs at 1112 cm⁻¹ in an FTIR spectrum?
A band near 1112 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
Brzi odgovor
A band near 1112 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.
Moguće dodjele funkcionalnih skupina
| Funkcionalna skupina | Potporni dokazi | Citirani izvori | Najveća pouzdanost |
|---|---|---|---|
| Methacrylate | 9 | 9 | 1,0 |
| C-O single bond | 9 | 9 | 1,0 |
| Acetate | 9 | 9 | 1,0 |
| Methoxy (OCH3) | 8 | 8 | 1,0 |
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Carbon dioxide | 1 | 1 | 1,0 |
| Thiocarbonyl | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.
Mogući materijali
| Materijal | Potporni vrhovi | Preklapajuće skupine | Citirani izvori |
|---|---|---|---|
| cellulose | 1112, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 1 |
| cellulose nanocrystals | 1112, 1110, 1640 | Acetate, Methacrylate, C-O single bond | 1 |
| hemicelluloses | 1112, 1735, 1270 | C-O single bond, Methacrylate, Acetate | 1 |
| Polyester | 1112, 1700, 1250 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| graphene oxide | 1112, 1150, 3400 | Methacrylate, Acetate, C-O single bond | 1 |
| lignin | 1112, 1035, 1510 | Methacrylate, Acetate, C-O single bond | 1 |
Materijali su prikazani samo kada ista literatura podržava ovu traku i barem jedan dodatni karakteristični vrh.
Logika spektra
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 1112 cm⁻¹ is usually not enough for material identification by itself.
Upotreba u stvarnom svijetu
Ova vrsta upita uobičajena je u identifikaciji polimera, probiru nepoznate plastike, rješavanju problema u kontroli kvalitete, provjeri recikliranog materijala i pregledu dodjele vrhova potkrijepljenom literaturom.
Uobičajene pogreške
- Tretiranje jedne izolirane vrpce kao dokaza materijala bez provjere barem jednog ili dva podržavajuća pika.
- Zanemarivanje preklapanja: više funkcionalnih skupina može doprinositi u blizini istog valnog broja.
- Preskakanje validacije kada aditivi, mješavine, oksidacija ili kontaminacija mogu izobličiti spektar.
Savjet za provjeru
Kada nejasnoća ostane, validirajte hipotezu pomoću DSC, GC-MS ili TGA, posebno za mješavine, degradirane uzorke i punjene polimere.
Literatura iza ovih dodjela
-
Amide pouzdanost 1,0
“Furthermore, PPy/rGO shows the additional bands at 1112 and 814 attributed to the C-N and N-H stretching band of the PPy ring [59, 60].”
Fabrication of Palladium Nanoparticles Anchored Polypyrrole Functionalized Reduced Graphene oxide Nanocomposite for Antibiofilm Associated Orthopedic Tissue Engineering DOI: 10.1016/j.apsusc.2020.145403 -
Acetate pouzdanost 1,0
“On the other hand, bands at 1112 and cm-1 assigned to C-O stretching vibration in the epoxy chain [52,64,65].”
Pereira 等 - 2020 - Ballistic Performance of Ramie Fabric Reinforcing DOI: 10.3390/polym12112711 -
Acetate pouzdanost 1,0
“X-ray Diffraction (XRD) Analysis All the spectra of the sample exhibited O-H stretching absorption around 3200~3450 The crystallinity index and crystallite size for all samples were calculated using the cm-1, along with C-O stretching absor”
Rana 等 - 2023 - Morphological, Spectroscopic and Thermal Analysis DOI: 10.3390/polym15061530 -
Acetate pouzdanost 1,0
“rylate resins 2 cm-1 1112 (-C=O stretching band of the soft Fourier-transform infrared (FTIR) spectral segment).”
Salem 和 Salama - 2020 - Developing a New Class of UV-curable Polyurethane DOI: 10.21608/ejchem.2019.14853.1906 -
Carboxyl (COOH) pouzdanost 1,0
“Images of both factor correlation n 4 u 1127cm-1/1096cm-1 1112cm-1/1096cm-1 coefficients and the peak height ratios and s c demonstrated higher acid phosphate content in younger vs.”
Spevak 等 - 2013 - Fourier Transform Infrared Spectroscopic Imaging P DOI: 10.1007/s00223-013-9695-9. -
Acetate pouzdanost 1,0
“+ - 15 C-O stretching 1112, 1114 (vs) + -”
Allouch 等 - 2019 - CHARACTERIZATION OF COMPONENTS ISOLATED FROM ALGER DOI: 10.1016/j.pecs.2012.02.002 -
C-O single bond pouzdanost 1,0
“The peak at 1112 is characteristic of C-OH stretching.”
Radiation Synthesis of Edible Coating Films of Nanocurcumin Based on Carboxymethyl Chitosan/Polyvinyl Alcohol to Extend the Shelf Life of Sweet Orange "Valencia" DOI: 10.1007/s10924-023-02854-6 -
Acetate pouzdanost 1,0
“The 3 cm-1 sharp peak at 1112 was assigned to the stretching vibration of the -C-O-Cgroup as shown in (Fig.”
A novel intra-tumoral drug delivery carrier for treatment of oral squamous cell carcinoma DOI: 10.1038/s41598-023-38230-6
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