What absorbs at 431 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 431 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 6 cited sources
Quick answer
A band near 431 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 | 4 | 4 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Silicon (Si) | 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 |
|---|---|---|---|
| ZnO | 431, 1400, 3430 | Metal oxygen | 2 |
| CuO | 431, 453, 1000 | Metal oxygen | 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 431 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
-
Silicon (Si) confianza 1,0
“The 2 7 https://arxiv.org/abs/1705.09394 cm-1 absorption band at 431 is assigned to Pb-O-Si bonds that prove the presence of the”
Kadikova 等 - 2020 - Glass depolymerization in the process of long-term DOI: 10.1002/jrs.5305. -
Metal oxygen confianza 1,0
“The cm(cid:2)1 is associprominent absorption peak at 431 ated with the fundamental Zn-O stretching mode.40,41 cm(cid:2)1, The other peaks observed at 677 cm(cid:2)1, cm(cid:2)1,”
Pandey 等 - 2016 - Deposition and Characterization of AlZnO Thin Fil DOI: 10.1007/s11664-016-4750-8 -
confianza 1,0
“The FTIR spectra of Cr 2O 3:CuO (50:50) thin films cm-1 cm-1 exhibit peaks between 431 and 774 which correspond to the characteristic stretching vibrations of Cu-O and Cr-O bonds in the films.”
Tuning the morphology of Cr2O3:CuO (50:50) thin films by RF magnetron sputtering for room temperature sensing application DOI: 10.1016/j.apsusc.2018.10.096 -
Metal oxygen confianza 1,0
“The typical bands at 416 and cm-1 and 431 are related to the metal oxide stretching vibrations of Zn-O bonds, while the 431 cm-1 are related to the metal oxide stretching vibrations of Zn-O bonds, while the cm-1 bands at 643, 700 and 790 co”
Rapid Bio-Assisted Synthesis and Magnetic Behavior of Zinc Oxide/Carbon Nanoparticles DOI: 10.3390/cryst13071081 -
confianza 1,0
“The absorption 431cm-1 , corresponding to the Zn-O vibrapeak located at tion frequency, is clearly represented, which is in agreement”
Iaiche 和 Djelloul - 2015 - ZnOZnAl2O4 Nanocomposite Films Studied by X-Ray D DOI: 10.1155/2015/836859 -
Carbohydrate confianza 1,0
“same characteristic band at 1035 2) cellulose showed a characteristic band at 431 cm-1;”
Revisiting the contribution of ATR-FTIR spectroscopy to characterize plant cell wall polysaccharides DOI: 10.1016/j.carbpol.2021.117935
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