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
Schnelle Antwort
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.
Mögliche Funktionsgruppenzuweisungen
| Funktionelle Gruppe | Unterstützende Fakten | Zitierte Quellen | Höchstes Vertrauen |
|---|---|---|---|
| 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 |
Das Ranking spiegelt die gesammelte Literatur Evidenz wider, nicht eine einzelne maßgebliche Regel. Bestätigen Sie immer anhand Ihres Probenkontexts.
Mögliche Materialien
| Material | Unterstützende Peaks | Überlappende Gruppen | Zitierte Quellen |
|---|---|---|---|
| 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 |
Materialien werden nur angezeigt, wenn derselbe Literaturpool diese Bande und mindestens einen weiteren charakteristischen Peak unterstützt.
Spektrumslogik
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.
Praktische Anwendung
Diese Art von Abfrage ist üblich bei der Polymeridentifikation, dem Screening unbekannter Kunststoffe, der Fehlersuche in der Qualitätskontrolle, der Verifizierung von Recyclingmaterial und der literaturgestützten Überprüfung der Peakzuordnung.
Häufige Fehler
- Behandlung einer isolierten Bande als Beweis für ein Material, ohne mindestens einen oder zwei unterstützende Peaks zu überprüfen.
- Überlappung ignorieren: Mehrere funktionelle Gruppen können nahe der gleichen Wellenzahl beitragen.
- Überspringen der Validierung, wenn Additive, Mischungen, Oxidation oder Verunreinigungen das Spektrum verfälschen können.
Beratung zur Verifizierung
Wenn weiterhin Mehrdeutigkeit besteht, validieren Sie die Hypothese mit DSC, GC-MS oder TGA, insbesondere bei Mischungen, degradierten Proben und gefüllten Polymeren.
Literatur hinter diesen Zuweisungen
-
Amide Vertrauen 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 Vertrauen 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 Vertrauen 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 Vertrauen 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) Vertrauen 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 Vertrauen 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 Vertrauen 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 Vertrauen 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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