Ketone — FTIR absorption peaks and assignments

Quick answer

Ketone 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 Ketone

Showing the 30 best-supported peaks of 864 total for Ketone.

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

• 1735 cm⁻¹ confidence 1.0

  “The new peak appears cm-1 at 1735 which indicates the presence of a C=O bond from carboxylic acid.”

  Arizka 等 - 2019 - Synthesis and Physical Properties Characterization DOI: 10.1088/1757-899X/546/4/042004
• 1713 cm⁻¹ confidence 1.0

  “This means that the addition shows sharp absorption and low intensity at 1712.8 cm-1 of DVB is able to shift the hydroxyl bonds in blends, which indicates the presence of C=O carbonyl so that DVB makes the blends more compatible.”

  Aritonang 等 - 2019 - Grafting of Oleic Acid On Cyclic Natural Rubber Re DOI: 10.13005/ojc/350119
• 3275 cm⁻¹ confidence 1.0

  “The two prominent peaks at 3275.13 and 1635.54 are typical of N-H bond of amines and C=C stretch of alkenes or C=O stretch of amides [42] respectively.”

  Biomedical Applications of Cocoa Bean Extract-Mediated Silver Nanoparticles as Antimicrobial, Larvicidal and Anticoagulant Agents DOI: 10.1007/s10876-016-1055-2
• 3401 cm⁻¹ confidence 1.0

  “Obvious Fourier transform infrared cm-1, cm-1, (FTIR) spectra for the GT extract were observed, showing absorption bands at 3401 1628 cm-1, and 1029 corresponding to O-H/N-H, C=O, and C-O groups, respectively.”

  Aziz 等 - 2017 - From Insulating PMMA Polymer to Conjugated Double DOI: 10.3390/polym9110626
• 1240 cm⁻¹ confidence 1.0

  “The disappearance of the lignin peak at 1240 could be due to conjugated ketone (phenyl-carbonyl) removal or the removal of ferulic and p-coumaric”

  Physicochemical characterisation of barley straw treated with sodium hydroxide or urea and its digestibility and in vitro fermentability in ruminants DOI: 10.1038/s41598-022-24738-w
• 1400 cm⁻¹ confidence 1.0

  “The two principal absorption peaks are observed between 1400 and corresponding to the symmetric and asymmetric stretching of the carboxyl group (C=O).”

  Mn doped ZnO nanostructured thin films prepared by ultrasonic spray pyrolysis method DOI: 10.1016/j.spmi.2012.06.023
• 1722 cm⁻¹ confidence 1.0

  “The test cm-1 1722 peak is assigned the n(C=O) groups, at the”

  Bakan 等 - 2019 - Synthesis, characterization, toxicity and in vivo DOI: 10.1007/s10965-019-1901-7
• 1616 cm⁻¹ confidence 1.0

  “New peaks appeared at 1616 and 1710 344 1 cm-1) that related to C=C stretching of newly formed polyaromatic, and, C=O stretching (1710 345”

  Balan 等 - 2021 - Esterification of residual palm oil using solid ac DOI: 10.1016/j.jtice.2012.07.001.