What absorbs at 430 cm⁻¹ in an FTIR spectrum?
A band near 430 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
Quick answer
A band near 430 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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| Metal oxygen | 7 | 7 | 1,0 |
| Silicon (Si) | 3 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Nitrate | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Silicon silicon | 1 | 1 | 1,0 |
| Phosphorus | 1 | 0 | 1,0 |
| Phosphate (PO4) | 1 | 0 | 1,0 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Possible materials
| Material | Stödjande toppar | Overlapping groups | Citerade källor |
|---|---|---|---|
| TiO2 | 430, 1700, 1093 | Metal oxygen, Hydroxyl (O-H) | 1 |
| quartz | 430, 800, 3053 | Silicon-oxygen (Si-O), Hydroxyl (O-H), Silicon (Si) | 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 430 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.
Litteratur bakom dessa identifieringar
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förtroende 1,0
“The frequency 2, cm-1 cm-1 (v 1) and 544-595 absorption bands in the ranges 430-442 (v 2, v 3) are assigned to the stretching vibration of the bonds between oxygen and metal ions in the octahedral and tetrahedral sites, respec-”
Impact of rare-earth ions on the physical properties of hexaferrites Ba0.5Sr0.5RE0.6Fe11.4O19, (RE = La, Yb, Sm, Gd, Er, Eu, and Dy) DOI: 10.1016/j.jallcom.2021.159812 -
Silicon (Si) förtroende 1,0
“(f) 3 and (g) 4 For comparison the 2 · · · cm-1 third band at 430 is related to local Si-Si vibrations spectrum of the Ge-bulk was included in (a).”
Mestanza 等 - 2007 - Fabrication and characterization of Ge nanocrystal DOI: 10.1007/s10853-007-1628-4 -
Ring structure förtroende 1,0
“1.217 0.951 C10 260cm-1 -1.42 -1.246 C17 whereas the peaks at 430 and are assigned to ring out- -1.42”
FTIR and FT Raman, molecular geometry, vibrational assignments, ab initio and density functional theory calculations for 1,5-methylnaphthalene DOI: 10.1016/j.saa.2010.09.002 -
Nitrate förtroende 1,0
“mixture of the precursor salts by mixing solutions of ~545cm-1 ~430cm-1 The peaks at and below wave each La(NO 3) 3.6H 2O (Loba Chemie), Fe(NO 3) 3.9H 2O numbers correspond to M-O and O-M-O bond of the (Qualigens) and HAuCl 4.xH 2O (SRL) in”
Nikam 和 Athawale - 2013 - Effect of Base and Dopant Concentration on Phase F DOI: 10.1063/1.4810567 -
förtroende 1,0
“Furthermore, the spectrum of the TiO NPs revealed a strong band 2 14 15 cm-1 cm-1, at 616 and a less intense peak at 430.09 which also corresponds to Ti-O stretching”
Ntozakhe 等 - 2019 - Influence of nitrogen doping on TiO2 nanoparticles DOI: 10.1088/2053-1591/ab2260 -
Metal oxygen förtroende 1,0
“Due to the bridging bond.”
Raj 等 - 2015 - Nanostructured V2O5 thin films deposited at low sp DOI: 10.1016/j.mssp.2015.04.054 -
Silicon (Si) förtroende 1,0
“430cm-1 CB21 and CB22 were tested by Raman spectroscopy as shown in and are attributed to Si-O backbone bending vibration Figure 8A andFigure 8D, and the obtainedspectral peaks are multi- (Johnston et al., 2008).”
Cao 和 Gu - 2023 - Mineralogical and spectral characteristics of Chan DOI: 10.3389/feart.2023.1183522 -
förtroende 1,0
“At lower frequency, the band at 430 mode.36, 37 is attributed to the (Ni-O Ligand) Upon H 2S coordination, some relevant changes occur in the framework vibrational region in both the frequency and the relative intensities of the Raman bands”
Chavan 等 - 2013 - Fundamental Aspects of H2S Adsorption on CPO-27-Ni DOI: 10.1021/jp402440u
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