N eq o — FTIR absorption peaks and assignments

Resposta rápida

N eq o is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.

Characteristic FTIR peaks for N eq o

Lógica do espectro

Uma atribuição de grupo funcional se torna mais confiável quando várias bandas esperadas aparecem juntas. Use esta página para encontrar os picos com maior suporte e, em seguida, confirme que a mesma amostra exibe um padrão coerente, em vez de um único pico isolado.

Uso no mundo real

Estas páginas são úteis para análise de material desconhecido, explicação de picos em relatórios, solução de problemas de polímeros e verificação se uma família de materiais candidata é quimicamente plausível.

Erros comuns

• Usar uma página de grupo funcional como veredito completo do material sem verificar o resto do espectro.
• Assumindo que a banda mais forte é sempre a mais diagnóstica.
• Esquecer que processamento, aditivos, envelhecimento e misturas podem deslocar ou alargar os picos esperados.

Conselho de verificação

Use DSC, GC-MS ou TGA quando várias famílias de materiais compartilham bandas semelhantes ou quando efeitos de mistura tornam a atribuição FTIR incerta.

Literatura por trás destas atribuições

• 1384 cm⁻¹ confiança 1,0

  “The band at 1384 is indicative of the N=O stretching vibration that was produced by the trace amount of nitrate [38].”

  Biosynthesis, characterization and cytotoxic activity of CeO2 nanoparticles DOI: 10.1016/j.ceramint.2018.04.063
• 1384 cm⁻¹ confiança 1,0

  “The cm-1 could be due to N=O stretching vibration indicating traces of nitrate sharp band at 1384”

  Bio-therapeutic Potential and Cytotoxicity Assessment of Pectin-Mediated Synthesized Nanostructured Cerium Oxide DOI: 10.1007/s12010-016-2121-9)
• 1409 cm⁻¹ confiança 1,0

  “5) showed six peaks which indicate the pres1409.02 is assigned to N=O bending nitro groups.”

  Ragavendran 和 Natarajan - 2015 - Insecticidal potency of Aspergillus terreus agains DOI: 10.1007/s11356-015-4961-1
• 838 cm⁻¹ confiança 1,0

  “The band cm-1 observed at 1277 is associated with C-N stretching, cm-1, and the two distinct bands occur at 838 and cm-1 639 related to the C-C ring and C-N=O bending,”

  Alibe 等 - 2019 - Effects of polyvinylpyrrolidone on structural and DOI: 10.1007/s10973-018-7874-7
• 3431 cm⁻¹ confiança 1,0

  “FTIR spectrum cm-1 (Figure 1c) showed major infrared transmittance peaks at 3431, 2925, 1631, and 1384 corresponding to O-H, C-H, C-N/C-C, and N=O, respectively.”

  Antibacterial, Antioxidant, Larvicidal and Anticancer Activities of Silver Nanoparticles Synthesized Using Extracts from Fruits of Lagerstroemia speciose and Flowers of Couroupita guianensis DOI: 10.3390/Shikun
• 502 cm⁻¹ confiança 1,0

  “1,502cm-1 appeared due to asymmetric N=O stretch.”

  Bala 等 - 2014 - Design, Synthesis, Characterization, and Computati DOI: 10.1155/2014/732141
• 1505 cm⁻¹ confiança 1,0

  “The peak observed at 1612 attributed to N-H bending vibrations of alkenes, primary amines, and amides, and the peak cm-1 can be attributed to N-H bending vibrations of alkenes, primary amines, and amcm-1 at 1505 can be assigned to N=O stret”

  Eucalyptus globulus and Salvia officinalis Extracts Mediated Green Synthesis of Silver Nanoparticles and Their Application as an Antioxidant and Antimicrobial Agent DOI: 10.3390/plants11081085
• 750 cm⁻¹ confiança 1,0

  “FTIR data revealed that Ery-PLGA nanoparticles' peaks at around 3650 cm-1 and 3000 cm-1, attributed to O-H stretching vibrations, at 1760 cm-1 to C=O stretch, at 1460 cm-1 assigned to C-H link, at 1400 cm-1 to N=O binding, 1180 cm-1 and 109”

  Nano-Architectonics of Antibiotic-Loaded Polymer Particles as Vehicles for Active Molecules DOI: 10.3390/app12041998