Aromatic ring — FTIR absorption peaks and assignments

Quick answer

Aromatic ring 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 Aromatic ring

Showing the 30 best-supported peaks of 1038 total for Aromatic ring.

Possible materials

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

• 1535 cm⁻¹ confidence 1.0

  “As observed in the MWCNTs sample, a typical signal at 1535 shows the cm-1 C=C vibration of structural aromatic.”

  Synthesis and Physical Properties Characterization of Montmorillonite-modified Carbon Nanotubes Filler DOI: 10.1088/1757-899X/546/4/042004
• 1514 cm⁻¹ confidence 1.0

  “The most intense bands were the carbonyl peak at 1672 cm-1 and the benzene ring stretching at 1514, 1477, and 1392 cm-1.”

  FTIR Approaches for Diuron Determination in Commercial Pesticide Formulations DOI: 10.1021/jf050268f
• 1600 cm⁻¹ confidence 1.0

  “For the drug QF, FT-IR analysis showed the characteristic 51 cm@1 peaks at 1600, 766 and 745 which are attributed to 52 presence of substituted benzene ring.”

  pH‐Responsive Studies of Bacterial Cellulose /Chitosan Hydrogels Crosslinked with Genipin: Swelling and Drug Release Behaviour DOI: 10.1002/slct.201902290
• 3000 cm⁻¹ confidence 1.0

  “3000cm-1 the region In the present case, the very strong rise to three bands above for aromatic C H and 1164cm-1 modes observed at 1289 and in IR corresponds to H stretching observed in the region between one aliphatic C 2900cm-1.”

  Fourier transform infrared and Raman spectral assignments and analysis of 7-amino-4-trifluoromethylcoumarin DOI: 10.1016/j.saa.2006.09.044
• 1514 cm⁻¹ confidence 1.0

  “Enzymatic delignification of cm-1 cm-1 this optimized mixture was supported by FTIR studies where peak intensity at 1514 and 1595 corresponding to the aromatic skeletal vibrations of lignin decreased in magnitude after delignification.”

  A strategic laccase mediated lignin degradation of lignocellulosic feedstocks for ethanol production DOI: 10.1016/j.indcrop.2016.08.009
• 1159 cm⁻¹ confidence 1.0

  “by N-C55O pseudosymmetric stretching at Other absorption bands 1589cm21, Downloaded C55C located at 1576 and due to stretching bands in chloroalk1159cm21 enes, at 1366 and corresponding to the benzene ring stretching spectra[30] and breathi”

  Vibrational Spectrometry Strategies for Quality Control of Procymidone in Pesticide Formulations DOI: 10.1080/00387010500315843
• 1628 cm⁻¹ confidence 1.0

  “A strong band at 1628 can also be assigned to the C=C stretch in the aromatic”

  From Insulating PMMA Polymer to Conjugated Double Bond Behavior: Green Chemistry as a Novel Approach to Fabricate Small Band Gap Polymers DOI: 10.3390/polym9110626
• 3017 cm⁻¹ confidence 1.0

  “For OI3-oligomer, a broad band at 3253 C-O cm-1 ─NH is primary stretch of amines, a small band near 3017 cm-1 ─C─H appeared due to aromatic stretch.”

  Influence of amine‐terminated additives on thermal and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) cured epoxy DOI: 10.1002/app.48404