What absorbs at 1639 cm⁻¹ in an FTIR spectrum?
A band near 1639 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
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Water (H2O) | 5 | 5 | 0,95 |
| Carbonyl (C=O) | 5 | 5 | 0,9 |
| Amide | 3 | 3 | 0,9 |
| Carboxyl (COOH) | 2 | 2 | 0,8 |
| Alkene (C=C) | 2 | 1 | 0,9 |
| Methyl | 1 | 1 | 0,9 |
| Protein beta sheet | 1 | 1 | 0,9 |
| Aromatic ring | 1 | 1 | 0,9 |
| Protein | 1 | 1 | 0,9 |
| Hydroxyl (O-H) | 1 | 1 | 0,7 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Bibliographie derrière ces attributions
-
Water (H2O) confiance 0,95
“Assigned to bending vibration absorption of H2O”
Wang 等 - 2018 - Developing Effective Separation of Feldspar and Qu DOI: 10.3390/min8040149 -
Water (H2O) confiance 0,95
“Explicit assignment: 'band at 1639 is assigned to the H-O-H bending vibration peak of the adsorbed water'.”
Xiao 等 - 2022 - Investigation on the Potential Application of Na-A DOI: 10.3390/molecules27238266 -
Protein confiance 0,9
“Same context as above.”
Lateef 等 - 2016 - Biogenic synthesis of silver nanoparticles using a DOI: 10.1016/j.jtusci.2015.10.010 -
confiance 0,9
“Explicit assignment in text.”
Zhu 等 - 2019 - Anticancer activity of green synthesised AgNPs fro DOI: 10.1049/iet-nbt.2018.5145 -
Water (H2O) confiance 0,9
“Explicit assignment in text.”
Adam 等 - 2012 - Liquid Phase Oxidation of Acetophenone over Rice H DOI: 10.1016/S1872-2067(11)60361-6 -
Carbonyl (C=O) confiance 0,9
“C=O band at 1639 from the linker shifted to lower wavenumbers due to coordination.”
Alejandro Torres-Cortes 等 - 2022 - Ex situ synthesis of MOF@PETcotton textile fibers DOI: 10.1007/s10965-022-03216-x -
Carbonyl (C=O) confiance 0,9
“C=O stretching”
Araujo 等 - 2021 - Comparison of Different Methods for Spongin-like C DOI: 10.3390/membranes11070522 -
confiance 0,9
“Explicitly assigned.”
Barbosa 等 - 2021 - Aloe Vera extract-based composite nanofibers for w DOI: 10.1016/j.msec.2021.112061
Avez-vous un spectre avec cette bande ?
Téléchargez votre spectre FTIR et obtenez un rapport d＇interprétation complet — attributions de pics avec citations bibliographiques, correspondances de bibliothèque et une chaîne de preuves avec évaluation de la confiance — en quelques secondes.
Interpréter mon spectre