What absorbs at 3265 cm⁻¹ in an FTIR spectrum?
A band near 3265 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 4 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
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Hydroxyl (O-H) confidence 1.0
“3c) shows that the sepa- -O-H References ration in the 3 different clusters is due mainly to the cm-1, -O-H stretching vibration at 3265 the bending at cm-1, cm-1, -C-H 1.”
Fundo 等 - 2015 - The Effect of PolymerPlasticiser Ratio in Film Fo DOI: 10.1007/s11483-015-9394-3 -
Alkyl C-H confidence 1.0
“(C-H bending), 1215.93 (C-O stretching), cm-1 3021.27 (C-H stretching) and 3264.99 FTIR of bionanoparticles and phenytoinloaded bionanoparticles”
Kumar 和 Madhav - 2021 - Exploration of Inbuilt Novel Properties as Bioreta DOI: 10.22037/ijpr.2021.113734.14457 -
Amide confidence 1.0
“LLM confirmed rule peak-group candidate”
Profiling of Silk Sericin from Cocoons of Three Southern African Wild Silk Moths with a Focus on Their Antimicrobial and Antioxidant Properties DOI: 10.3390/ma13245706 -
Water (H2O) confidence 1.0
“3265cm-1 indicative of the presence of water, at approximately and OH groups, but they are inversely correlated to the oil content (Fig.”
FTIR-ATR spectroscopy as a tool for the rapid detection of adulterations in butter cheeses DOI: 10.1016/j.lwt.2019.04.017
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