What absorbs at 457 cm⁻¹ in an FTIR spectrum?
A band near 457 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 457 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 |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Metal hydroxyl | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| C c single bond | 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 |
|---|---|---|---|
| SiO2 | 457, 1739, 699 | Hydroxyl (O-H), Metal oxygen | 1 |
| Fe3O4 | 457, 2358, 1673 | Hydroxyl (O-H), Metal oxygen | 1 |
| cotton | 457, 1030, 1638 | Hydroxyl (O-H), Ester | 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 457 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
-
C c single bond kumpiyansa 1.0
“The bands at 457 and 434 are ascribed to C-C-O ring deformation modes while 517 and 378 peaks are due to CO-C glycosidic link deformation and C-C-C ring deformation vibrations, respectively.”
Adebajo 等 - 2006 - Raman spectroscopic investigation of acetylation o DOI: 10.1016/j.saa.2005.07.045 -
kumpiyansa 1.0
“The other two vibrational peaks seen at 457 and 460 in OPC and clinker, respectively, might be resulted from the in-plane Si-O bending in SiO4 tetrahedra”
Micro-characterization of Dust and Materials of Dust Origin at a Cement Industry Located in Bangladesh DOI: 10.4209/aaqr.220109 -
Hydroxyl (O-H) kumpiyansa 1.0
“Fritsch et al.: OH stretching vibrations in serpentines 457 frequencies.”
Fritsch 等 - 2021 - Structural, textural, and chemical controls on the DOI: 10.5194/ejm-33-447-2021 -
kumpiyansa 1.0
“Additionally, two new peaks appeared at 457 cm-1 and 623 in the IR spectrum of ZnO@OFE NPs, which are characteristic of bending vibrations of Zn-O bonds, in agreement with previous reports [40].”
Improved Photocatalytic and Antioxidant Activity of Olive Fruit Extract-Mediated ZnO Nanoparticles DOI: 10.3390/antiox12061201 -
kumpiyansa 1.0
“Ti4+ 2p 2p the two strong peaks Ti (464.31 eV) and Ti (458.53 eV) are assigned to (TiO [27] and 1/2 3/2 2 Ti-OH) and the two peaks (457.01 and 462.44 eV) are attributed to Ti 2O [31].”
Deposition of TiO2 Thin Films on Wood Substrate by an Air Atmospheric Pressure Plasma Jet DOI: 10.3390/coatings9070441 -
Metal oxygen kumpiyansa 1.0
“The sharp peak positioned at 457 is of the presence of Zn-O stretching bonds.”
Synthesis, Characterization and Antimicrobial Activity of Zinc Oxide Nanoparticles against Selected Waterborne Bacterial and Yeast Pathogens DOI: 10.3390/molecules27113532 -
Ester kumpiyansa 1.0
“Metabolites 2014, 4 457 cm-1 the lipid content (2984-2780 methyl and methylene groups or stretching of ester bonds at cm-1), which can be explained only by different cellular biochemical ratios.”
Wagner 等 - 2014 - Surveillance of C-allocation in microalgal cells. DOI: 10.3390/metabo4020453 -
Metal oxygen kumpiyansa 0.9
“Peak at 457 cm-1 assigned to Fe-O stretching vibration.”
Fe3O4@SiO2@KIT-6@2-ATP@CuI as a catalyst for hydration of benzonitriles and reduction of nitroarenes DOI: 10.1038/s41598-023-34409-z
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