What absorbs at 477 cm⁻¹ in an FTIR spectrum?

Resposta rápida

A band near 477 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

A classificação reflete a evidência acumulada da literatura, não uma única regra autoritária. Sempre confirme com o contexto da sua amostra.

Materiais possíveis

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 477 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

  “The first band band position is due to the difference in the discm-1 at 477.25 represents the vibration due to metal-oxygen tances for the octahedral and tetrahedral complexes.”

  Influence of cobalt substitution on structural, optical, electrical and magnetic properties of nanosized lithium ferrite DOI: 10.1007/s10854-018-9744-2
• confiança 1,0

  “The cm-1 cm-1 peak observed at 477 and 620 can be assigned Experimental Fish and Acclimatization: The work was to Ni-O and Ni-O-H bond, respectively.”

  Aziz 等 - 2021 - Effect of Engineered Nickel Oxide Nanoparticles on DOI: 10.29261/pakvetj/2021.044
• Nucleic acid confiança 1,0

  “The Raman spectrum of DNA TFs exhibited 6 O TiO 2] in the DNA and DNA-CT TFs increased due to the characteristic Raman bands centered at around 477, 678, 732, cto physical interactions between them.”

  Dugasani 等 - 2019 - Optoelectronic properties of DNA thin films implan DOI: 10.1063/1.5063446
• confiança 1,0

  “SiO 2-NPs were suspended in saline solution, spectral bands detected were 477 for Si-O out of cm-1 cm-1 cm-1 plane deformation, 801 for Si-O bending, 970 for Si-OH stretching, 1097 for Si-O-Si asymmetric stretching (Figure 1b).”

  Astrocytes Are More Vulnerable than Neurons to Silicon Dioxide Nanoparticle Toxicity in Vitro DOI: 10.3390/toxics8030051
• Alkyl C-H confiança 1,0

  “bending vibration bands were recognized at 601 and 477cm-1 The stretching mode energy responds to variations in unit [35], the bending of C-H was observed at 875 cm-1 cell volume via two mechanisms: shifts in bond length and [36].”

  Ismail 等 - 2023 - The role of nanoparticles inclusion in monitoring DOI: 10.1007/s41779-023-00836-4
• Carbohydrate confiança 1,0

  “LLM confirmed rule peak-group candidate”

  Vibrational and fluorescence spectroscopy to study gluten and zein interactions in complex dough systems DOI: 10.1016/j.crfs.2022.02.009