What absorbs at 1651 cm⁻¹ in an FTIR spectrum?
A band near 1651 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
Možná přiřazení funkčních skupin
| Funkční skupina | Podpůrná fakta | Citované zdroje | Nejvyšší spolehlivost |
|---|---|---|---|
| Carbonyl (C=O) | 7 | 7 | 0,95 |
| Amide | 5 | 5 | 1,0 |
| Alkene (C=C) | 4 | 4 | 1,0 |
| Carboxyl (COOH) | 4 | 3 | 0,9 |
| Protein alpha helix | 2 | 2 | 0,9 |
| Water (H2O) | 2 | 1 | 0,9 |
| C-O single bond | 1 | 1 | 0,9 |
| Amino acid | 1 | 1 | 0,8 |
| C=n | 1 | 1 | 0,8 |
| Protein random coil | 1 | 1 | 0,8 |
Pořadí odráží nahromaděné literární důkazy, nikoli jediné autoritativní pravidlo. Vždy potvrďte v kontextu vašeho vzorku.
Literatura za těmito přiřazeními
-
Amide spolehlivost 1,0
“Explicit assignment in text: 'Amides I ... at 1651'”
Liu 等 - 2013 - Silk-inspired polyurethane containing GlyAlaGlyAla DOI: 10.1002/app.39185 -
Alkene (C=C) spolehlivost 1,0
“C=C functional group still presented”
Rozi 等 - 2016 - Characterization of Ultraviolet-Photocured Acrylam DOI: 10.1063/1.4966755 -
Carbonyl (C=O) spolehlivost 0,95
“explicit assignment”
Panghal 等 - 2014 - Dissolution Improvement of Atorvastatin Calcium us DOI: 10.3797/scipharm.1301-23 -
Water (H2O) spolehlivost 0,9
“Explicit: '1651 cm-1 ... H2O groups'”
Rahim 等 - 2021 - Physicochemical properties of phosphate butyrate a DOI: 10.1088/1755-1315/681/1/012043 -
spolehlivost 0,9
“Text: '1651 (U, G, A, and C)'”
Routh 等 - 2009 - Self assembly of poly(o-methoxy aniline) with RNA DOI: 10.1016/j.bpc.2009.05.004 -
spolehlivost 0,9
“Explicit assignment in text: 'typical absorption of C=C alkenes at 1651'”
Sugianto 等 - 2019 - Facile Synthesis of Lycopene Reduced Graphene Oxid DOI: 10.1088/1757-899X/546/4/042044 -
Carboxyl (COOH) spolehlivost 0,9
“Text: 'band at 1651 confirmed the presence of and assigned to stretching of the COO-'”
Tran 等 - 2017 - Removal of metal ions from aqueous solutions using DOI: 10.1016/j.carbpol.2016.09.049 -
Carbonyl (C=O) spolehlivost 0,9
“Explicit assignment: '1650.77... corresponding to functional groups... C=O'.”
Aldawsari 等 - 2021 - Development and Characterization of Calcium-Algina DOI: 10.3390/md19080467
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