What absorbs at 3522 cm⁻¹ in an FTIR spectrum?
A band near 3522 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) | 2 | 2 | 1.0 |
| Water (H2O) | 2 | 2 | 1.0 |
| Hydrogen bond | 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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Water (H2O) confidence 1.0
“3) spectra can be 8 O-H assigned to one of the bonds in the O10 water 9 O10-H101…O1 molecule, while the distance of 2.942 Å 10 cm-1 (Table 5) corresponds to the sharp peak at 3522 11 cm-1 which is present in the Raman spectrum, and 3526”
Ventruti 等 - 2016 - Hydrogen bond system and vibrational spectroscopy DOI: 10.1127/ejm/2016/0028-2571 -
Water (H2O) confidence 1.0
“cm-1 Cl 0.12 1.49 The bands located at 3522 and 3433 correspond to the valence vibrations of the cm-1, O 1.62 water molecule.”
Synthesis of New Homopiperazine-1.4-Diium Tetrachloridromercurate (II) Monohydrate (C5H14N2)[HgCl4]H2O, Crystal Structure, Hirshfeld Surface, Spectroscopy, Thermal Analysis, Antioxidant Activity, Electric and Dielectric Behavior DOI: 10.3390/cryst12040486 -
Hydroxyl (O-H) confidence 1.0
“shows two characteristic bands observed at 3522 and 3361 These bands are respectively attributed to free hydroxyl stretching vibrations (not hydrogen bonded) and to those that are self-associated (hydrogen bonded) with the hydroxyl groups (”
Miscibility and Hydrogen Bonding in Blends of Poly(4-vinylphenol)/Poly(vinyl methyl ketone) DOI: 10.3390/polym6112752 -
Hydrogen bond confidence 1.0
“According to cm-1 and 3550 related to intramolecular hydrogen bond Kubo and Kadla (2005), in lignin the hydroxyl groups cm-1 in phenolic groups, and a small band at around 3522 in alcoholic and phenolic compounds form several lignin2,20.”
Poletto 和 Zattera - 2013 - Materials Produced from Plant Biomass. Part III D DOI: 10.1590/S1516-14392013005000112
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