What absorbs at 432 cm⁻¹ in an FTIR spectrum?
A band near 432 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
Resposta rápida
A band near 432 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.
Possíveis atribuições de grupos funcionais
| Grupo funcional | Fatos de suporte | Fontes citadas | Maior confiança |
|---|---|---|---|
| Metal oxygen | 9 | 6 | 1,0 |
| Alkyl C-H | 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 |
| Phosphorus | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| S s | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 0 | 1,0 |
A classificação reflete a evidência acumulada da literatura, não uma única regra autoritária. Sempre confirme com o contexto da sua amostra.
Materiais possíveis
| Material | Picos de suporte | Grupos sobrepostos | Fontes citadas |
|---|---|---|---|
| NiO | 432, 1006, 1450 | Metal oxygen, Alkyl C-H, Methoxy (OCH3) | 2 |
| ZnO | 432, 1400, 3430 | Metal oxygen, Alkyl C-H, Methacrylate | 1 |
| MWCNT | 432, 2876, 1430 | Alkyl C-H, Methoxy (OCH3), Methacrylate | 1 |
Os materiais são mostrados apenas quando o mesmo conjunto de literatura suporta esta banda e pelo menos um pico característico adicional.
Lógica do espectro
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 432 cm⁻¹ is usually not enough for material identification by itself.
Uso no mundo real
Este tipo de consulta é comum em identificação de polímeros, triagem de plásticos desconhecidos, solução de problemas de CQ, verificação de materiais reciclados e revisão de atribuição de picos apoiada pela literatura.
Erros comuns
- Tratar uma banda isolada como prova de um material sem verificar pelo menos um ou dois picos de suporte.
- Ignorando sobreposição: vários grupos funcionais podem contribuir próximo ao mesmo número de onda.
- Ignorar a validação quando aditivos, misturas, oxidação ou contaminação podem distorcer o espectro.
Conselho de verificação
Quando a ambiguidade persistir, valide a hipótese com DSC, GC-MS ou TGA, especialmente para misturas, amostras degradadas e polímeros carregados.
Literatura por trás destas atribuições
-
Metal oxygen confiança 1,0
“Figure 3b shows the FTIR characteristic of the absorption band of BaFe 12O appearing at Figure 3b shows the FTIR characteristic of the absorption band of BaFe12O19 appearing at 542.71 19 cm-1 cm-1 542.71 and 432.48 [54,55], which correspond”
Effect of Ratio in Ammonium Nitrate on the Structural, Microstructural, Magnetic, and AC Conductivity Properties of BaFe12O19 DOI: 10.3390/ma11112190 -
Metal oxygen confiança 1,0
“The peak at 432 cm-1 of the Raman spectra is the E2 phonon mode of the metal oxide NPs involved.”
Effects of Nd doping on structural, optical, morphological and surface-chemical state analysis of ZnO nanoparticles for antimicrobial and anticancer activities DOI: 10.1016/j.surfin.2021.101000 -
confiança 1,0
“While the characteristic peaks at 432 cm-1 Nc NC, which showed high concentration of Ni, O, Si, C, and 504 correspond to the vibration of Ni-O bond”
Efficient photodegradation of orange II dye by nickel oxide nanoparticles and nanoclay supported nickel oxide nanocomposite DOI: 10.1007/s13201-022-01647-x -
Metal oxygen confiança 1,0
“The EIS The presence of metal-oxygen bond was confirmed by of the all the samples resulted with a distorted semicircle FTIR data from the broad band found at 432.07cm-1.”
Facile preparation and characterization of novel manganese doped nickel oxide based nanostructured e DOI: 10.1080/21870764.2020.1793477 -
S s confiança 1,0
“(10 mg/mL), 16.333 2.028 (1 mg/mL), 10.000 2.000 ± ± Moreover, the FTIR spectra presented peaks at 432.19 (S-S (0.1 mg/mL), 32.333 0.882 (10 mg/mL), 21.000 1.732 ± ± stretch),576.19(C-Sstretch),707.35(C-Sstretch),1080.53(S-H (1 mg/mL), 13.0”
Ao 等 - 2022 - Green synthesis of biogenetic Te(0) nanoparticles DOI: 10.3389/fmicb.2022.1020179 -
Phosphate (PO4) confiança 1,0
“Therefore, in the obtained Raman spectra the presence of the phosphate group is highlighted by the vibrational bands at around 445 and 432 cm-1 that could be attributed”
Development of Silver Doped Hydroxyapatite Thin Films for Biomedical Applications DOI: 10.3390/coatings12030341 -
Alkyl C-H confiança 1,0
“Both peaks at cm-1 432 2994 and 2943 are attributed to the aliphatic asymmetric stretching vibration of the -CH”
Influence of montmorillonite/carbon nanotube hybrid nanofillers on the properties of poly(lactic acid) DOI: 10.1016/j.clay.2020.105925 -
Acetate confiança 1,0
“Castor oil showed a wide 430 band at 3450 cm-1 for hydroxyl groups, 2920 and 2850 cm-1 for CH2 and CH3 scissoring, 1743 cm-1 for 431 C-O ester groups, 1711 cm-1 for the stretching of C-O in free fatty acids, 1281 cm-1 for asymmetric C-O 432”
Vazquez-Gonzalez 等 - 2021 - Electrosprayed cashew gum microparticles for the e DOI: 10.1016/j.carbpol.2016.08.031
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