N eq o — FTIR absorption peaks and assignments

Quick answer

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

Spectrum logic

A functional-group assignment becomes more reliable when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.

Real-world usage

These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.

Common mistakes

• Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
• Assuming the strongest band is always the most diagnostic one.
• Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.

Verification advice

Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.

Литература, лежащая в основе этих назначений

• 1384 cm⁻¹ достоверность 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 достоверность 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 достоверность 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 достоверность 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 достоверность 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 достоверность 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 достоверность 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 достоверность 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