Phenolic — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Phenolic tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 320,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
Phenolic 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 Phenolic
| Wavenumber (cm⁻¹) | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| 3275 | 2 | 2 | 0.9 |
| 3450 | 2 | 2 | 0.9 |
| 3440 | 2 | 2 | 0.9 |
| 3247 | 1 | 1 | 1.0 |
| 3404 | 1 | 1 | 1.0 |
| 3201 | 1 | 1 | 1.0 |
| 3087 | 1 | 1 | 0.95 |
| 3430 | 1 | 1 | 0.95 |
| 1375 | 1 | 1 | 0.9 |
| 3177 | 1 | 1 | 0.9 |
| 1620 | 1 | 1 | 0.9 |
| 1443 | 1 | 1 | 0.9 |
| 1520 | 1 | 1 | 0.9 |
| 1249 | 1 | 1 | 0.9 |
| 1270 | 1 | 1 | 0.9 |
| 3380 | 1 | 1 | 0.9 |
| 3390 | 1 | 1 | 0.9 |
| 3370 | 1 | 1 | 0.9 |
| 1160 | 1 | 1 | 0.9 |
| 1444 | 1 | 1 | 0.9 |
| 3296 | 1 | 1 | 0.9 |
| 1641 | 1 | 1 | 0.9 |
| 3426 | 1 | 1 | 0.9 |
| 1636 | 1 | 1 | 0.9 |
| 3293 | 1 | 1 | 0.8 |
| 1645 | 1 | 1 | 0.8 |
| 3400 | 1 | 1 | 0.8 |
| 1605 | 1 | 1 | 0.8 |
| 2162 | 1 | 1 | 0.8 |
| 544 | 1 | 1 | 0.8 |
Showing the 30 best-supported peaks of 35 total for Phenolic.
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
-
3201 cm⁻¹ confidence 1.0
“Peak 3201 cm-1 is directly assigned to OH stretch of phenolic-OH in HA.”
Kinetics and Thermodynamics of Uranium (VI) Adsorption onto Humic Acid Derived from Leonardite DOI: 10.3390/ijerph16091552 -
3404 cm⁻¹ confidence 1.0
“Explicit assignment in text.”
Corrosion Inhibition of Mild Steel Using Parinari polyandra Leave Extracts in Diluted Hydrochloric Acids DOI: 10.4152/pea.2021390605 -
3247 cm⁻¹ confidence 1.0
“Direct assignment in text.”
Spray-Drying of Hydroxypropyl β-Cyclodextrin Microcapsules for Co-Encapsulation of Resveratrol and Piperine with Enhanced Solubility DOI: 10.3390/cryst12050596 -
3430 cm⁻¹ confidence 0.95
“Explicit assignment: 'free OH band (3430/cm), from the phenolic OH group'”
Martins 等 - 2020 - Release of adsorbed ferulic acid in simulated gast DOI: 10.1007/s00217-020-03489-w -
3087 cm⁻¹ confidence 0.95
“Explicit assignment to Genistein.”
Formulation of Genistein-HP β Cyclodextrin-Poloxamer 188 Ternary Inclusion Complex: Solubility to Cytotoxicity Assessment DOI: 10.3390/pharmaceutics13121997 -
3275 cm⁻¹ confidence 0.9
“Explicit assignment to phenolics and proteins in CBE-AgNPs.”
Biomedical Applications of Cocoa Bean Extract-Mediated Silver Nanoparticles as Antimicrobial, Larvicidal and Anticoagulant Agents DOI: 10.1007/s10876-016-1055-2 -
3426 cm⁻¹ confidence 0.9
“Explicit assignment of peaks to phenolics in biosynthesized AgNPs.”
Paper wasp nest-mediated biosynthesis of silver nanoparticles for antimicrobial, catalytic, anticoagulant, and thrombolytic applications DOI: 10.1007/s13205-016-0459-x -
3296 cm⁻¹ confidence 0.9
“Explicit assignment in text.”
In Vitro Human Microbiota Response to Exposure to Silver Nanoparticles Biosynthesized with Mushroom Extract DOI: 10.3390/nu10050607
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