What absorbs at 443 cm⁻¹ in an FTIR spectrum?
A band near 443 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
Hurtigt svar
A band near 443 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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Metal oxygen | 4 | 4 | 1,0 |
| S s | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| N h | 1 | 0 | 1,0 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Spektrumlogik
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 443 cm⁻¹ is usually not enough for material identification by itself.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Metal oxygen tillid 1,0
“2(b)] shows the presence of sharp diffraction spots indiregion of This band is attributed to the bendcm(cid:1)1) Fe-O cating the formation of well developed, highly crystalline ing vibration of the bond (nearly at 443 in the unit28 nanopart”
Tailoring the Magnetic and Optical Characteristics of Nanocrystalline BiFeO3 by Ce Doping DOI: 10.1111/j.1551-2916.2012.05132.x -
tillid 1,0
“The band at 443 was attributed to sympoured between two copper plates in the air.”
Luminescence in Er3+ co-doped bismuth germinate glass–ceramics for blue and green emitting applications DOI: 10.1007/s43207-022-00281-2 -
Carbonyl (C=O) tillid 1,0
“bands at 1743 from ester carbonyl (C=O) group stretching vibrations 443”
Kharbach 等 - 2021 - New insights into the Argan oil categories charact DOI: 10.1016/j.talanta.2020.122073 -
Silicon (Si) tillid 1,0
“The band between 443 and 452 are attributed to Si-O-Si in plane cm-1 bending vibration.”
Lancellotti 等 - 2015 - Geopolymers An option for the valorization of inc DOI: 10.1016/j.ceramint.2014.10.008 -
Metal oxygen tillid 1,0
“two - 4 -1andtwobandsat443and445cm -1 bandsat582and586cm could be pairwise indexed to the stretching vibrations of (311) metal-oxygen bonds in tetrahedron sites and in octahedron”
Nguyen 等 - 2019 - A Facile Synthesis, Characterization, and Photocat DOI: 10.1155/2019/3428681 -
S s tillid 1,0
“LLM confirmed rule peak-group candidate”
Rapid Estimation of Sulfur Content in High-Ash Indian Coal Using Mid-Infrared FTIR Data DOI: 10.3390/min13050634 -
Metal oxygen tillid 0,95
“Explicit: 'Ag-O bands at 561 and 443'.”
Athawale 和 Desai - 2011 - Silver doped lanthanum chromites by microwave comb DOI: 10.1016/j.ceramint.2011.05.008 -
Metal oxygen tillid 0,8
“Characteristic band for Fe-O stretching.”
Mesoporous magnetite nanoparticles synthesis using the Peltophorum pterocarpum pod extract, their antibacterial efficacy against pathogens and ability to remove a pollutant dye DOI: 10.1016/j.molstruc.2018.10.042
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