Ring structure — FTIR absorption peaks and assignments

Quick answer

Ring structure 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 Ring structure

Showing the 30 best-supported peaks of 812 total for Ring structure.

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

• 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
• 810 cm⁻¹ confidence 1.0

  “It is worth mentioning that the peak at 810 (figure 8(c)) which corresponds to 27 28 the epoxy ring in AESO structure has gradually become weaker and almost disappeared after 30”

  Electrosprayed PMMA microcapsules containing green soybean oil-based acrylated epoxy and a thiol: a novel resin for smart self-healing coatings DOI: 10.1088/1361-665X/ab9754
• 1781 cm⁻¹ confidence 1.0

  “500 The most intense bands of iprodione are located at 1781 cm-1, and 998 which are due to C=O stretching and ring 400 breathing, respectively.”

  Determination of iprodione in agrochemicals by infrared and Raman spectrometry DOI: 10.1007/s00216-007-1152-z
• 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
• 1161 cm⁻¹ confidence 1.0

  “cm-1, due to Meanwhile, the presence of electron-withdrawing bromines in Meanwhile, the intense peaks at 1161 and 1042 υ(CCC) compound (2), reduced the electron density in the phenylene ring stretching vibration of long linear dioctyloxy ch”

  Synthesis of a 1,4‐Bis[2‐(5‐thiophen‐2‐yl)‐1‐benzothiophene]‐2,5‐dioctyloxybenzene Pentamer for Creatinine Detection DOI: 10.1002/ajoc.202100374
• 1628 cm⁻¹ confidence 1.0

  “A strong band at 1628 cm-1 can also be assigned to the C=C stretch in the ring and the C=O stretch in polyphenols [18,19].”

  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
• 3192 cm⁻¹ confidence 1.0

  “The bands at 3089 and cm-1 δ, tributors, although from tan it is the high level DMSO and 3192 correspond to the N-H stretch of the Ba ring.”

  Conductivity or rheology? Tradeoff for competing properties in the fabrication of a gel polymer electrolyte based on chitosan-barbiturate derivative DOI: 10.1007/s11581-018-2515-5