Oxygen heterocycle — FTIR absorption peaks and assignments

Quick answer

Oxygen heterocycle 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 Oxygen heterocycle

Showing the 30 best-supported peaks of 170 total for Oxygen heterocycle.

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

• 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”

  Ataei 等 - 2020 - Electrosprayed PMMA microcapsules containing green DOI: 10.1088/1361-665X/ab9754
• 1700 cm⁻¹ confidence 1.0

  “It is rather interesting to detect a carboxyl group's peak (C=O) at 1700 cm-1, associated with an oleic acid epoxide, apparently decreased after polymerization.”

  Bahadi 等 - 2021 - Synthesis and Characterization of Green Biodegrada DOI: 10.33263/BRIAC116.1435914371
• 913 cm⁻¹ confidence 1.0

  “The FTIR of cured epoxy shows ring opening by the disappearance of oxirane ring peak at 913 whereas X-ray diffraction shows its amorphous phase in the cured state.”

  Influence of amine‐terminated additives on thermal and mechanical properties of diglycidyl ether of bisphenol A (DGEBA) cured epoxy DOI: 10.1002/app.48404
• 1738 cm⁻¹ confidence 1.0

  “Appearance of new peak at 1738 corresponding to carbonyl ester stretch indicates possible esterification reaction of carboxylic anion with highly strained epoxy ring leading to ionized epoxide (shown in Fig.”

  Mechanism and Kinetics of Curing of Diglycidyl Ether of Bisphenol A (DGEBA) Resin by Chitosan DOI: 10.1002/pen.24463
• 916 cm⁻¹ confidence 1.0

  “LLM confirmed rule peak-group candidate”

  Barbadillo 等 - 2003 - Study of a curing reaction of an epoxy resin DOI: 10.4028/www.scientific.net/MSF.426-432.2163
• 1300 cm⁻¹ confidence 1.0

  “The cm(cid:3)1intheC-matandcomposite lackofamajorpeakaround1300 indicatesthat the DWNTstarted with few defects and the curingof the epoxy did not damage them.”

  Probing deformation of double-walled carbon nanotube (DWNT)/epoxy composites using FTIR and Raman techniques DOI: 10.1016/j.compscitech.2010.04.025
• 875 cm⁻¹ confidence 1.0

  “cm-1 The existence of the epoxide ring in the purified ENR-25 is shown by peak at 875 due to half ring stretching of the epoxide while the full ring stretching is at 1234 cm-1 [9].”

  Dahham 等 - 2018 - The Influences of Zirconium Dioxide on ENR-25ZrO2 DOI: 10.1088/1742-6596/1019/1/012055
• 1717 cm⁻¹ confidence 1.0

  “The peak at 1486 cm-1 of ODA belongs to the C-H bend, and it moves to 1464 cm-1 in cm-1 cm-1 The bands at 1717 and 1060 corresponding to carboxyl and epoxide were weakened functionalized GO.”

  Daud 等 - 2017 - Functionalizing Graphene Oxide with Alkylamine by DOI: 10.3390/nano7060135