What absorbs at 1648 cm⁻¹ in an FTIR spectrum?
A band near 1648 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 |
|---|---|---|---|
| Carbonyl (C=O) | 8 | 8 | 1,0 |
| Amide | 8 | 5 | 1,0 |
| Water (H2O) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkene (C=C) | 2 | 2 | 0,9 |
| C=n | 1 | 1 | 0,9 |
| Carboxyl (COOH) | 1 | 1 | 0,8 |
| N h | 1 | 1 | 0,8 |
| Aromatic ring | 1 | 1 | 0,6 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Litteratur bakom dessa identifieringar
-
Carbonyl (C=O) förtroende 1,0
“Explicit assignment: 'C=O stretching vibration at 1648 cm-1'.”
Liao LePing 等 - 2011 - Preparation and characterization of microcapsule c DOI: 10.1007/s11434-010-4133-0 -
Water (H2O) förtroende 1,0
“explicit assignment”
Pegado 等 - 2018 - First evidence of microplastic ingestion by fishes DOI: 10.1016/j.marpolbul.2018.06.035 -
Hydroxyl (O-H) förtroende 1,0
“Explicit assignment: '1648 cm-1 were attributed to OH deformation' and 'band around 1648 indicates the stretching of C=O in the carboxylic functional'”
Rozman 等 - 2021 - Optimisation of Stingless Bee Honey Nanoemulsions DOI: 10.3390/foods10092133 -
Carbonyl (C=O) förtroende 0,95
“explicit assignment for FEN”
Gorniak 等 - 2023 - Screening of Fenofibrate-Simvastatin Solid Dispers DOI: 10.3390/pharmaceutics15020603 -
förtroende 0,9
“Assigned as band B in figure caption.”
Liu 等 - 2020 - Effect of different carbohydrates on the functiona DOI: 10.1016/j.jcs.2020.102979 -
Hydroxyl (O-H) förtroende 0,9
“Peak at 1648 cm-1 assigned to O-H bending band of water.”
Maeda - 2001 - IR spectroscopic study on the hydration and the ph DOI: 10.1021/la001346q -
Water (H2O) förtroende 0,9
“Bending vibration of H-O-H group.”
Ahmed 等 - 2023 - Immobilization Approach as a Creative Strategy to DOI: 10.3390/polym15071797 -
Amide förtroende 0,9
“Explicit assignment in text.”
Eylul Kiymaci 等 - 2022 - Antioxidative, cytotoxic, and antibacterial proper DOI: 10.2478/aiht-2022-73-3658
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