What absorbs at 3289 cm⁻¹ in an FTIR spectrum?
A band near 3289 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 5 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| N h | 4 | 4 | 0.9 |
| Hydroxyl (O-H) | 3 | 3 | 0.9 |
| Hydrogen bond | 1 | 1 | 0.9 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
N h confidence 0.9
“NH and OH stretching vibrations”
Durazzo 等 - 2018 - Qualitative Analysis of Traditional Italian Dishes DOI: 10.3390/su10114112 -
Hydroxyl (O-H) confidence 0.9
“Peak at 3289 cm-1 correlates with O-H and N-H vibration.”
Gabriela Chuc-Gamboa 等 - 2021 - Antibacterial Behavior of Chitosan-Sodium Hyaluron DOI: 10.3390/app1103 -
Hydrogen bond confidence 0.9
“Explicit assignment in snippet: 'peak at 3289 which is ascribed to the extensive intramolecular hydrogen'”
Palumbo 等 - 2019 - Guar Gum as an Eco-Friendly Corrosion Inhibitor fo DOI: 10.3390/ma12162620 -
Hydroxyl (O-H) confidence 0.9
“Explicit assignment: stretching mode of O-H and N-H.”
Silva 等 - 2021 - DOI: 10.15446/rcciquifa.v50n2.91038 -
N h confidence 0.8
“Absorption peak in FG/MCC films, indicating -NH involvement.”
Pan 等 - 2020 - Preparation and Properties of Microcrystalline Cel DOI: 10.3390/ma13194370
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