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
Mabilis na sagot
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.
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| 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 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Mga posibleng materyales
| Materyal | Sumusuportang mga peak | Mga overlapping na grupo | Mga nasiping sanggunian |
|---|---|---|---|
| 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 |
Ang mga materyales ay ipinapakita lamang kapag ang parehong literatura pool ay sumusuporta sa banda na ito at hindi bababa sa isang karagdagang katangian na tuktok.
Logic ng spectrum
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.
Paggamit sa totoong mundo
Ang uri ng query na ito ay karaniwan sa pagtukoy ng polymer, screening ng hindi kilalang plastic, pag-troubleshoot ng QC, pag-verify ng recycled na materyal, at pagsusuri ng pagtatalaga ng peak na may suporta ng literatura.
Mga karaniwang pagkakamali
- Pagtrato sa isang nakahiwalay na banda bilang patunay ng isang materyal nang hindi sinusuri ang hindi bababa sa isa o dalawang sumusuportang peak.
- Hindi pinapansin ang overlap: maraming functional group ang maaaring mag-ambag malapit sa parehong wavenumber.
- Pag-laktaw sa pagpapatunay kapag ang mga additives, blends, oxidation, o contamination ay maaaring mag-distort ng spectrum.
Payo sa pagpapatunay
Kapag nananatili ang kalabuan, patunayan ang hypothesis gamit ang DSC, GC-MS, o TGA, lalo na para sa mga blend, degraded na sample, at filled polymers.
Literatura sa likod ng mga pagtatalagang ito
-
Amide kumpiyansa 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 kumpiyansa 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 kumpiyansa 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 kumpiyansa 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) kumpiyansa 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 kumpiyansa 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 kumpiyansa 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 kumpiyansa 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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