What absorbs at 3287 cm⁻¹ in an FTIR spectrum?
A band near 3287 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1.0 |
| N 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
-
Hydroxyl (O-H) confidence 1.0
“At 24 h (Figure 6A), there is cm-1, a peak at 3287 corresponding to the presence of OH groups, followed by a peak cm-1,”
Remineralization Potential of Three Restorative Glass Ionomer Cements: An In Vitro Study DOI: 10.3390/jcm12062434 -
Hydroxyl (O-H) confidence 1.0
“Cornstarch PVP CPNCPNCPN0 5 35 O-H stretching 3287”
Jothi 等 - 2021 - Proton conducting polymer electrolyte based on cor DOI: 10.1007/s11581-020-03792-2 -
Hydroxyl (O-H) confidence 1.0
“C-O stretching) and CH (3287.49 -OH stretching, 2917.48 -CH stretching) maintain their place in PVA/CH and PVA/CH/Ag hydrogels.”
Sprayed in-situ synthesis of Polyvinyl alcohol/Chitosan loaded Silver nanocomposite hydrogel for improved antibacterial effects DOI: 10.1016/j.ijbiomac.2019.09.186 -
Hydroxyl (O-H) confidence 1.0
“The peak from 3287 cm-1 shows that there was registered valence vibrations ν for the -OH and -NH groups.”
The Comparative Study of the State of Conservation of Two Medieval Documents on Parchment from Different Historical Periods DOI: 10.3390/ma13214766 -
N h confidence 1.0
“LLM confirmed rule peak-group candidate”
Che 等 - 2019 - Investigations on Aging Behavior and Mechanism of DOI: 10.3390/ma12213636
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