What absorbs at 423 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 423 cm⁻¹ puede apuntar a varios grupos funcionales. A continuación se muestran las asignaciones más probables, clasificadas por cuánta evidencia publicada respalda cada una — cada una trazable a literatura (DOI) y validada de forma cruzada con nuestros más de 130,000 espectros de referencia y grafo de conocimiento.
Backed by 8 cited sources
Quick answer
A band near 423 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.
Posibles asignaciones de grupos funcionales
| Grupo funcional | Hechos de respaldo | Fuentes citadas | Confianza máxima |
|---|---|---|---|
| Metal oxygen | 5 | 5 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Metalloid oxygen | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Thiol | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
La clasificación refleja la evidencia acumulada de la literatura, no una única regla autorizada. Siempre confirme según el contexto de su muestra.
Possible materials
| Material | Supporting peaks | Overlapping groups | Fuentes citadas |
|---|---|---|---|
| soil | 423, 575, 1240 | Hydroxyl (O-H), Silicon-oxygen (Si-O) | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
Spectrum logic
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 423 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
Literatura detrás de estas asignaciones
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confianza 1,0
“the temperature till 873 K, one can conclude that the peak at 423K It is interesting to observe that the rate of reduction was inirepresents the metallic state of Au species.”
Fabrication and characterization of bimetallic Pt⠍Au nanowires supported on FSM-16 and their catalytic activities toward water⠍gas shift reaction DOI: 10.1016/j.jcis.2010.10.008 -
Silicon (Si) confianza 1,0
“FTIR Analysis cm-1 plane bending vibration and (779,972) correspond to the tensile vibration of the Figure 5 shows that the absorption bands at (423,536) cm-1 correspond to the in-plane Si-O bond, indicating the existence of C-S-H gel [26-2”
Preparation and Characterization of Low-Carbon Cementitious Materials Based on Soda-Residue-Activated Ground Granulated Blast-Furnace Slag: A Case Study on Cemented Paste Backfills DOI: 10.3390/met -
confianza 1,0
“The FTIR spectral peak cm-1 observed at 423 corresponds to the stretching frequency of Ni-O nanoparticles [19].”
Synthesis and Crystal Structure of [Ni(Amgu)2]X2 – Novel Solid-State Precursors for NiO Nanoparticles DOI: 10.1016/j.ica.2018.07.021 -
Silicon-oxygen (Si-O) confianza 1,0
“cm-1 Peaks at wavenumbers of 423, 463, and 520 are associated with the O-Si-O bending of Peaks at wavenumbers of 423, 463, and 520 cm-1 are associated with the O-Si-O bending of”
Varrica 等 - 2019 - ATR-FTIR Spectral Analysis and Soluble Components DOI: 10.3390/ijerph16142507 -
Metal oxygen confianza 1,0
“4 at 568 cm-1 corresponded to the υ(Fe-O) lattice stretching vibration of magnetite (Fe 3O 4) cm-1, cm-1, (υ(Fe-O)) at 568 as well as the observed band at ~423 which was the bluenanoparticles [4].”
Mesoporous Magnetic Cysteine Functionalized Chitosan Nanocomposite for Selective Uranyl Ions Sorption: Experimental, Structural Characterization, and Mechanistic Studies DOI: 10.3390/polym14132568 -
Hydroxyl (O-H) confianza 1,0
“The sharp strong peak at 423 cm-1 was a double degenerate (Au) mode of the OH stretching and translational vibrations [61].”
Thermal Degradation Characteristics of Styrene-Butadiene-Styrene Copolymer Asphalt Binder Filled with an Inorganic Flame-Retarding Agent DOI: 10.3390/polym14183761 -
Carbonate confianza 1,0
“Finally, the peak present at 423 °C with 18% weight loss is attributed to the degradation of fragments and monomer unit's conversion into carbonate.”
Flores-Hernandez 等 - 2021 - Synthesis of a Biodegradable Polymer of Poly (Sodi DOI: 10.3390/polym13040504 -
Hydroxyl (O-H) confianza 1,0
“The first component, Cp1, accounted for 48.2% of the variance and showed large positive (> 0.7) loadings for cm-1) kaolinite (3694, 3651, 3619, 1029, 1005, 911, 693, 647, 606, 585, 531, 423 cm-1) and OH (3424 and 3215 vibrations, chromatici”
Garcia-Lopez 等 - 2022 - Understanding Necrosol pedogenetical processes in DOI: 10.1038/s41598-022-14750-5
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