What absorbs at 1550 cm⁻¹ in an FTIR spectrum?
A band near 1550 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 | 36 | 32 | 1,0 |
| Carboxyl (COOH) | 6 | 5 | 0,9 |
| Carbonyl (C=O) | 3 | 2 | 0,9 |
| N-O bond | 2 | 2 | 0,9 |
| N h | 2 | 2 | 0,9 |
| Alkene (C=C) | 2 | 2 | 0,9 |
| Amine primary | 2 | 2 | 0,9 |
| C n single bond | 2 | 2 | 0,8 |
| Lignin | 2 | 2 | 0,7 |
| C c single bond | 1 | 1 | 1,0 |
| Bronsted acid site | 1 | 1 | 0,9 |
| C-O single bond | 1 | 1 | 0,9 |
| Protein alpha helix | 1 | 1 | 0,9 |
| Aromatic ring | 1 | 1 | 0,9 |
| Ring structure | 1 | 1 | 0,8 |
| Protein | 1 | 1 | 0,7 |
| Alkyl C-H | 1 | 1 | 0,7 |
| Ester | 1 | 1 | 0,7 |
| Carbonate | 1 | 1 | 0,7 |
| Nitrate | 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
-
Amide confiance 1,0
“Explicitly stated: 'amide II peak at 1550 cm-1'”
Jardine 等 - 2017 - Shedding light on sporopollenin chemistry, with re DOI: 10.1016/j.revpalbo.2016.11.014 -
Amide confiance 1,0
“Explicit assignment: amide-II (~1550 cm-1)”
Brogna 等 - 2020 - Spectral fingerprinting to evaluate effects of sto DOI: 10.1038/s41598-020-78306-1 -
C c single bond confiance 1,0
“Text: 'The peak at 1550 can be assigned for C-C stretching mode of PPy chains'.”
Irfan 和 Shakoor - 2020 - Structural, Electrical and Dielectric Properties o DOI: 10.1007/s10904-019-01287-w -
Amide confiance 0,95
“Explicitly stated as Amide II peak.”
Fogarty 等 - 2013 - Sub-cellular spectrochemical imaging of isolated h DOI: 10.1039/c2an36197c -
Amide confiance 0,95
“Explicit assignment: amide II peak at 1550 cm-1 arises from N-H bending and C-N stretching of amide groups.”
Diab 等 - 2021 - Characterization of Insulin Mucoadhesive Buccal Fi DOI: 10.3390/sym13010088 -
Amide confiance 0,95
“Text: '1550 cm-1 (amide-II peak representing the combination of stretching vibrations in the amide linkage)'”
Newman 等 - 2020 - Elastin-Collagen Based Hydrogels as Model Scaffold DOI: 10.3390/bioengineering7030110 -
Amine primary confiance 0,9
“Explicit assignment in text”
BOUSETTA 等 - 1994 - FORMATION OF CARBON NITRIDE FILMS ON SI(100) SUBST DOI: 10.1063/1.112272 -
confiance 0,9
“Text: 'the ~1550 (produced by graphite-related bonding)'.”
Choi 等 - 2022 - Characterization of coated colorless synthetic moi DOI: 10.6111/JKCGCT.2022.32.1.007
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