What absorbs at 1681 cm⁻¹ in an FTIR spectrum?
A band near 1681 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 |
|---|---|---|---|
| Amide | 7 | 7 | 0,9 |
| Carbonyl (C=O) | 3 | 3 | 0,9 |
| Carboxyl (COOH) | 1 | 1 | 0,9 |
| Metal oxygen | 1 | 1 | 0,9 |
| Protein beta sheet | 1 | 0 | 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
-
Metal oxygen confiance 0,9
“Peak at 1681 cm-1 assigned to unreacted terminal COOH CdO stretching.”
Mahapatro 等 - 2006 - Surface modification of functional self-assembled DOI: 10.1021/la052817h -
Carbonyl (C=O) confiance 0,9
“Text: 'C=O stretch at 1680.83'”
Chong 等 - 2016 - An improved method for aldol condensation catalyse DOI: 10.1515/gps-2015-0126 -
Amide confiance 0,9
“Amide-I band at 1681 cm-1 identified.”
Furutani 等 - 2015 - Specific interactions between alkali metal cations DOI: 10.2142/biophysico.12.0_37 -
Carbonyl (C=O) confiance 0,9
“Symmetric stretching vibration of carbonyl group, split band.”
Grzesiak 和 Brycki - 2012 - Synthesis, FTIR, C-13-NMR and Temperature-Dependen DOI: 10.3390/molecules171012427 -
Amide confiance 0,9
“C=O of amide.”
Hegde 等 - 2018 - Synthesis and Antimicrobial Screening of Pyrimidin DOI: 10.5012/jkcs.2018.62.2.87 -
Amide confiance 0,9
“Explicit assignment: 'peaks at 1681 and 1642 represent the amide I region'.”
Skilling 等 - 2014 - Gelation properties of self-assembling N-acyl modi DOI: 10.1039/x0xx00000x -
Amide confiance 0,9
“Explicit assignment in text: 'carbonyl stretching vibration of amide I on PNIPAAm was detected at 1681'”
Ziminska 等 - 2020 - Synthesis and Evaluation of a Thermoresponsive Deg DOI: 10.3390/ma13112530 -
Amide confiance 0,8
“Component band of amide I'.”
Yamamoto 等 - 2010 - FTIR observation of compression recovery of the se DOI: 10.1088/1742-6596/215/1/012155
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