What absorbs at 3509 cm⁻¹ in an FTIR spectrum?
A band near 3509 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 1 cited source
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 0.9 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
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Acetate confidence 1.0
“cm-1 in CUR was also For blank micelles, the band at 1048.92 could be due to the C-O-C stretching vibration of HA.31 cm-1, cm-1 After encapsulation of CUR in micelles, the characteristic peaks of CUR at 3509.36 1629.37 and cm-1 962.48 were”
Niu 等 - 2022 - Hyaluronic Acid Micelles for Promoting the Skin Pe DOI: 10.2147/IJN.S372711
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