What absorbs at 1719 cm⁻¹ in an FTIR spectrum?
A band near 1719 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 |
|---|---|---|---|
| Carbonyl (C=O) | 6 | 6 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 0,95 |
| Urethane | 1 | 1 | 0,9 |
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
-
Carbonyl (C=O) confiance 1,0
“carbonyl group”
Wei 等 - 2020 - Investigating flotation behavior and mechanism of DOI: 10.37190/ppmp/119662 -
Carboxyl (COOH) confiance 0,95
“Explicit assignment in text: '1719.42 -COOH(Carboxyl)stretching'”
Sujiono 等 - 2020 - Graphene oxide based coconut shell waste synthesi DOI: 10.1016/j.heliyon.2020.e04568 -
Carbonyl (C=O) confiance 0,9
“Explicit assignment: 'the 1719 cm-1 was the absorption peak of C=O'”
Wu 等 - 2020 - Lipophilic modification of T-ZnOw and optical prop DOI: 10.1007/s00339-020-3436-5 -
Urethane confiance 0,9
“Text: 'peaks at 1719 and 1720 attributed to urethane linkage'.”
Hafezi 等 - 2016 - Polyurethane58S bioglass nanofibers synthesis, c DOI: 10.1039/c5ra24786a -
Carbonyl (C=O) confiance 0,9
“Text: 'strong and broad band at 1719 is a combination of C=O'”
Hoang 等 - 2022 - Acidolysis of Poly(ethylene terephthalate) Waste U DOI: 10.1021/acsomega.2c06642 -
Carbonyl (C=O) confiance 0,9
“Explicitly assigned.”
Rysbek 等 - 2022 - Comparative Characterization and Identification of DOI: 10.3390/polym14020335 -
confiance 0,9
“Strong absorption band at 1719 cm-1 assigned to esteric group and C-O esteric bond.”
Stefan 等 - 2011 - Synthesis and characterization of a new methacryli DOI: 10.3906/kim-1103-63 -
Carbonyl (C=O) confiance 0,9
“Explicit assignment: C=O bond, green line, due to acetic acid.”
Wen 等 - 2017 - A Novel Synthesis of 4-Acetoxyl 5(4H)-Oxazolones b DOI: 10.3390/molecules22071102
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