What absorbs at 3440 cm⁻¹ in an FTIR spectrum?
A band near 3440 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
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| Hydroxyl (O-H) | 24 | 23 | 1,0 |
| Water (H2O) | 3 | 3 | 1,0 |
| N h | 3 | 3 | 0,9 |
| Phenolic | 2 | 2 | 0,9 |
| Urea | 1 | 1 | 0,9 |
| Urethane | 1 | 1 | 0,9 |
| Amine primary | 1 | 1 | 0,9 |
| Carboxyl (COOH) | 1 | 1 | 0,9 |
| Lignin | 1 | 1 | 0,7 |
| Carbohydrate | 1 | 1 | 0,7 |
| Amide | 1 | 0 | 0,9 |
| Alkyl C-H | 1 | 0 | 0,8 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Litteratur bakom dessa identifieringar
-
Water (H2O) förtroende 1,0
“Stretching vibration mode of adsorbed water molecules on the surface of ferrite.”
Anchieta 等 - 2014 - Effects of Solvent Diols on the Synthesis of ZnFe2 DOI: 10.3390/ma7096281 -
Hydroxyl (O-H) förtroende 1,0
“Explicit assignment: 'at 3440.4 are attributed to the O-H stretching'”
El-Batal 等 - 2016 - Biodiesel Production by Aspergillus niger Lipase I DOI: 10.3390/bioengineering3020014 -
Hydroxyl (O-H) förtroende 1,0
“assigned to hydroxyl groups”
Franca 等 - 2020 - Monitoring diclofenac adsorption by organophilic a DOI: 10.1016/j.envpol.2013.04.012 -
Hydroxyl (O-H) förtroende 0,95
“Explicit assignment: 'prominent band centered at 3440 is O-H assigned to the tridentate stretching vibration'”
Jeyanthi 等 - 2014 - Structural and spectroscopic studies of rare earth DOI: 10.1016/j.ceramint.2014.01.076 -
Hydroxyl (O-H) förtroende 0,95
“Part of the same region assigned to O-H stretching.”
Kaur 等 - 2020 - Removal of Pb (II) from aqueous solution using nan DOI: 10.1016/j.btre.2019.e00410 -
Hydroxyl (O-H) förtroende 0,9
“Broad band due to hydroxyl groups”
Lagat 等 - 2021 - Antimicrobial Activity of Chemically and Biologica DOI: 10.3390/microorganisms9122417 -
förtroende 0,9
“Same as above.”
Schingaro 等 - 2021 - New insights into the crystal chemistry of sauconi DOI: 10.2138/am-2020-7460. -
Hydroxyl (O-H) förtroende 0,9
“Band at ~3440 cm-1 ascribed to oscillation of hydroxyl group.”
Sharma 等 - 2017 - Impact of CuS on the crystallization kinetics of N DOI: 10.1016/j.jnoncrysol.2017.09.046
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