What absorbs at 3436 cm⁻¹ in an FTIR spectrum?
A band near 3436 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 8 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Hydroxyl (O-H) | 8 | 8 | 0.9 |
| N h | 3 | 3 | 0.9 |
| Hydrogen bond | 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 0.9
“Text: 'absorption at 3436 was attributed to O-H stretching mode'”
Naik 等 - 2020 - Bright red luminescence emission of macroporous ho DOI: 10.1007/s42452-020-2639-x -
Hydroxyl (O-H) confidence 0.9
“Explicit assignment: 'Bands at 3436 ... have indicated the presence of hydroxy'”
Pathak 和 Srivastava - 2009 - Synthesis and Characterization of Functional Copol DOI: 10.1002/app.29614 -
Hydroxyl (O-H) confidence 0.9
“Snippet: 'peak at 3436.3 was due to the OH'”
El-Naggar 等 - 2022 - Statistical optimization for simultaneous removal DOI: 10.1038/s41598-022-11069-z -
Hydroxyl (O-H) confidence 0.9
“Explicitly assigned to -OH groups.”
Jalal 等 - 2018 - Biosynthesis of Silver Nanoparticles from Orophary DOI: 10.3390/nano8080586 -
Hydroxyl (O-H) confidence 0.9
“assigned to OH stretch”
Jantarat 等 - 2014 - Curcumin-Hydroxypropyl-beta-Cyclodextrin Inclusion DOI: 10.4314/tjpr.v13i8.4 -
Hydroxyl (O-H) confidence 0.9
“explicit assignment”
Panwar 等 - 2016 - Characterization and anticancer potential of ferul DOI: 10.1007/s13204-015-0502-y) -
N h confidence 0.9
“Explicit assignment.”
Rumengan 等 - 2017 - Characterization of chitin extracted from fish sca DOI: 10.1088/1755-1315/89/1/012028 -
N h confidence 0.9
“Explicit assignment: ν_as(NH) = 3436 cm-1.”
Solovyeva 等 - 2021 - Water Vapor Adsorption on CAU-10-X Effect of Func DOI: 10.1021/acs.langmuir.0c02729
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