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
Kiire vastus
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.
Võimalikud funktsionaalrühmade määramised
| Funktsionaalrühm | Toetavad faktid | Tsiteeritud allikad | Kõrgeim usaldusväärsus |
|---|---|---|---|
| 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 |
Reiting kajastab kogunenud kirjanduslikke tõendeid, mitte ühte autoriteetset reeglit. Kinnitage alati oma proovi kontekstis.
Võimalikud materjalid
| Materjal | Toetavad piigid | Kattuvad rühmad | Tsiteeritud allikad |
|---|---|---|---|
| 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 |
Materjale kuvatakse ainult siis, kui sama kirjanduse kogum toetab seda riba ja vähemalt ühte täiendavat iseloomulikku piiki.
Spektri loogika
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.
Reaalse maailma kasutus
Seda tüüpi päring on tavaline polümeeri tuvastamisel, tundmatu plasti sõeluuringul, kvaliteedikontrolli probleemide lahendamisel, ringlussevõetud materjali kontrollimisel ja kirjandusel põhineval piirkinnituste ülevaatel.
Levinud vead
- Ühe isoleeritud riba käsitlemine materjali tõendina ilma vähemalt ühte või kahte toetavat piiki kontrollimata.
- Ülekattumise ignoreerimine: mitu funktsionaalrühma võivad anda panuse sama lainearvu lähedal.
- Valideerimise vahelejätmine, kui lisandid, segud, oksüdatsioon või saastumine võivad spektrit moonutada.
Kontrollimise nõuanne
Kui ebakindlus püsib, kinnitage hüpotees DSC, GC-MS või TGA abil, eriti segude, lagunenud proovide ja täidetud polümeeride puhul.
Nende määramiste taga olev kirjandus
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C c single bond usaldusväärsus 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 -
usaldusväärsus 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) usaldusväärsus 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 -
usaldusväärsus 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 -
usaldusväärsus 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 usaldusväärsus 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 usaldusväärsus 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 usaldusväärsus 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
Kas teil on selle ribaga spekter?
Laadige üles oma FTIR spekter ja saage sekunditega täielik tõlgendusaruanne — piikide määramised kirjandusviidetega, raamatukogu vasted ja usaldusväärsusega hinnatud tõendite ahel.