What absorbs at 1636 cm⁻¹ in an FTIR spectrum?
A band near 1636 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
Възможни определяния на функционални групи
| Функционална група | Подкрепящи факти | Цитирани източници | Най-висока достоверност |
|---|---|---|---|
| Water (H2O) | 7 | 7 | 1,0 |
| Alkene (C=C) | 6 | 6 | 0,9 |
| Carbonyl (C=O) | 4 | 4 | 1,0 |
| Amide | 4 | 3 | 1,0 |
| Protein beta sheet | 4 | 3 | 0,95 |
| Carboxyl (COOH) | 3 | 3 | 0,95 |
| C=n | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 0,9 |
| C-O single bond | 1 | 1 | 0,9 |
| Protein | 1 | 1 | 0,9 |
| Phenolic | 1 | 1 | 0,9 |
| Carbonate | 1 | 1 | 0,7 |
| C n single bond | 1 | 1 | 0,6 |
Класирането отразява натрупаните литературни доказателства, а не единично авторитетно правило. Винаги потвърждавайте спрямо контекста на вашата проба.
Литература зад тези определяния
-
Water (H2O) достоверност 1,0
“Assignment: 'band at 1636 cm-1 ... corresponds to the bending vibration of the coordinated water'”
Maragkou 和 Pashalidis - 2021 - Investigations on the Interaction of EDTA with Cal DOI: 10.3390/coatings11091037 -
C=n достоверност 1,0
“Strong band assignable to azomethine group.”
Nasaruddin 等 - 2022 - Synthesis, Structural Characterization, Hirshfeld DOI: 10.1021/acsomega.2c04688 -
C=n достоверност 1,0
“Assigned to C=N stretching vibration of tetradentate ONNO functionality.”
Wu 等 - 2015 - Selective Oxidation of Glycerol with 3% H2O2 Catal DOI: 10.3390/catal5042039 -
Carbonyl (C=O) достоверност 1,0
“Explicit assignment in text: 'peak at 1636 in PT spectrum is assigned to the stretching vibrations of C=O.'”
Zhang 等 - 2018 - Selective Adsorption of Au-III from Aqueous Soluti DOI: 10.21577/0103-5053.20180022 -
Protein beta sheet достоверност 0,95
“Explicit assignment: 'β-sheet band ca. 1636 cm-1'.”
Yu 等 - 2015 - Molecular basis of processing-induced changes in p DOI: 10.1016/j.saa.2015.06.050 -
достоверност 0,95
“Explicit: 'characteristic peak of -CO on the amide group was observed at 1636 cm-1'”
Ding 等 - 2023 - Preparation of Heavy Metal Trapping Flocculant Pol DOI: 10.3390/polym15030500 -
Carboxyl (COOH) достоверност 0,95
“Explicit assignment: assigned to the C=O group of the carboxylic acid”
Selepe 等 - 2022 - Electro-Catalytic Properties of Palladium and Pall DOI: 10.3390/catal12060608 -
Phenolic достоверност 0,9
“Text: 'prominent peaks at 3275.13 and 1635.54 involvement of phenolics and proteins'”
Azeez 等 - 2017 - Biomedical Applications of Cocoa Bean Extract-Medi DOI: 10.1007/s10876-016-1055-2
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