What absorbs at 3632 cm⁻¹ in an FTIR spectrum?
A band near 3632 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) | 3 | 3 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Metal hydroxyl | 1 | 1 | 0.9 |
| N h | 1 | 1 | 0.8 |
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
“assigned to hydroxyl groups”
Franca 等 - 2020 - Monitoring diclofenac adsorption by organophilic a DOI: 10.1016/j.envpol.2013.04.012 -
Water (H2O) confidence 1.0
“explicit assignment”
Mino 等 - 2012 - Particles Morphology and Surface Properties As Inv DOI: 10.1021/jp303942h -
Hydroxyl (O-H) confidence 0.9
“unperturbed ν(OH) modes of water”
Mino 等 - 2013 - Rutile Surface Properties Beyond the Single Crysta DOI: 10.1021/jp401916q -
Hydroxyl (O-H) confidence 0.9
“Due to -OH stretch of structural Al-OH.”
Wojcik-Bania 和 Matusik - 2021 - The Effect of Surfactant-Modified Montmorillonite DOI: 10.3390/ma14102623 -
N h confidence 0.8
“Text: 'peaks of 3632 and 2929 are related to the N-H vibrations and the C-H stretching band.'”
Jarestan 等 - 2020 - Preparation, characterization, and anticancer effi DOI: 10.1007/s13205-020-02230-4
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