Amine primary — FTIR absorption peaks and assignments

Quick answer

Amine primary 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 Amine primary

Showing the 30 best-supported peaks of 242 total for Amine primary.

Spectrum logic

A functional-group assignment becomes more confident 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.

Literature behind these assignments

• 1649 cm⁻¹ confidence 1.0

  “In 41 cm@1 chitosan, the peaks at 1649 and 1579 are attributed to the The BC formed was removed from the fermenting container 42 amino (NH 2) and N@H bending vibrations respectively.”

  Arikibe 等 - 2019 - pH-Responsive Studies of Bacterial CelluloseChito DOI: 10.1002/slct.201902290
• 482 cm⁻¹ confidence 1.0

  “cm-1 and 1635 due to stretching vibrations of O-H group, the bands assigned at 3275 cmcm-1, - 1 the band at 2922 due to vibrations of C H stretching thee band at 1213 1062cm-1,482cm-1,576cm-1,1535cm-1arethefollowingvibrationsC-Ostretching,N”

  Bio-engineered TiO2 nanoparticles using Ledebouria revoluta extract: Larvicidal, histopathological, antibacterial and anticancer activity DOI: 10.1080/03067319.2020.1718668
• 1564 cm⁻¹ confidence 1.0

  “At the cm-1 1564 the peak is due to primary amine group N-H acid's”

  Bakan 等 - 2019 - Synthesis, characterization, toxicity and in vivo DOI: 10.1007/s10965-019-1901-7
• 1400 cm⁻¹ confidence 1.0

  “(1250cm-1),C\\Cstretchofaromaticcompounds(1400cm-1),N\\H cm-1) and carboxylic acids bends due to primary amines (1650 2.6.”

  A rapid method for fungal assisted algal flocculation: Critical parameters & mechanism insights DOI: 10.1016/j.algal.2016.10.022
• 1623 cm⁻¹ confidence 1.0

  “Because urea and ChCL intermolecular hydrogen interactions are formed, the stretching vibration of NH2 at 1662 cm-1 and the asymmetric vibration of NH2 at 1606 cm-1 in the FTIR spectra of urea shifted to 1663 and 1623 cm-1, respectively, in”

  Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569
• 3250 cm⁻¹ confidence 1.0

  “to C=O stretching and N-H stretching at 1650-1580 In addition, the third peak at 3250 related to N-H stretching for the aliphatic primary amine around 3400-3300 cm-1 and cm-1 3250 related to N-H stretching for the aliphatic primary amine ar”

  Nutritional Quality, Chemical, and Functional Characteristics of Hemp (Cannabis sativa ssp. sativa) Protein Isolate DOI: 10.3390/plants11212825
• 1637 cm⁻¹ confidence 1.0

  “The presence of N-H bent primary amines is revealed by the band at 1637 in the spectra, which corresponds to (-NH-C=O).”

  Nematicidal activity of seaweed-synthesized silver nanoparticles and extracts against Meloidogyne incognita on tomato plants DOI: 10.1038/s41598-022-06600-1
• 3407 cm⁻¹ confidence 1.0

  “shifted to higher wavenumber of 3407 Two new peaks of primary amine (N-H) were observed at cm-1”

  Solid polymer electrolyte production from 2-hydroxyethyl cellulose: Effect of NH4NO3 composition on its structural properties DOI: 10.1016/j.carbpol.2017.02.033