What absorbs at 3493 cm⁻¹ in an FTIR spectrum?
A band near 3493 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 3 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Water (H2O) | 2 | 2 | 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
“zinc acetate used in The fundamental mode of vibration near 3492.95 corresponds to the asymmetric and symmetric stretching H-O-H vibration.”
Khan 等 - 2016 - Sol-gel synthesis of thorn-like ZnO nanoparticles DOI: 10.1038/srep27689 -
Water (H2O) confidence 1.0
“(6) N-H(cid:5)(cid:5)(cid:5)N stretching 3341 3345 3351 3358 that there are no N-N and H-H bonds present in the (7) N-H stretching 3389 3396 3399 3403 (8) H-O-H stretching 3493 3499 3499 3499 layers, we relate the atomic concentration to th”
Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004 -
Hydroxyl (O-H) confidence 0.9
“Peak at 3493 cm-1 corresponds to alcohol and phenol compounds”
Kuraganti 等 - 2023 - Preparation and Characterization of Silver Nanopar DOI: 10.5530/ijper.57.2s.38
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