What absorbs at 1630 cm⁻¹ in an FTIR spectrum?
A band near 1630 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
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Amide | 23 | 22 | 1,0 |
| Water (H2O) | 17 | 15 | 1,0 |
| Carbonyl (C=O) | 12 | 10 | 0,95 |
| Hydroxyl (O-H) | 10 | 9 | 1,0 |
| Alkene (C=C) | 9 | 8 | 0,9 |
| Protein beta sheet | 8 | 7 | 1,0 |
| Carboxyl (COOH) | 5 | 5 | 0,9 |
| Protein | 4 | 4 | 0,9 |
| C=n | 4 | 3 | 0,9 |
| N h | 3 | 3 | 0,9 |
| Aromatic ring | 3 | 3 | 0,9 |
| Amine primary | 2 | 2 | 0,9 |
| Lignin | 2 | 2 | 0,9 |
| Alkyl C-H | 1 | 1 | 0,9 |
| Metal hydroxyl | 1 | 1 | 0,9 |
| Metal oxygen | 1 | 1 | 0,9 |
| Silanol (Si-OH) | 1 | 1 | 0,8 |
| Lipid | 1 | 1 | 0,6 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Литература, лежащая в основе этих назначений
-
Hydroxyl (O-H) достоверность 1,0
“The bending at 1630 cm-1 is attributed to the H-O-H bonding due to the water molecules ad-”
Ashwini 等 - 2021 - Synthesis and Characterization of Zinc Oxide Nanop DOI: 10.3390/catal11121507 -
достоверность 1,0
“Explicit assignment in text: '1630 cm-1 due to ... O-H scissor bending modes'”
Ducrozet 等 - 2021 - New Insights into the Reactivity of Detonation Nan DOI: 10.3390/nano11102671 -
достоверность 1,0
“Text: 'cm-1 1630 is related to the OH stretching and deformation vibration of the adsorbed water'”
Jeziorska 等 - 2023 - Morphology and Selected Properties of Modified Pot DOI: 10.3390/polym15071762 -
Amide достоверность 1,0
“amide I vibration characteristic of β-sheet rich secondary structures”
Sood 等 - 2011 - Disassembly of preformed amyloid beta fibrils by s DOI: 10.1016/j.bmcl.2011.02.012. -
Water (H2O) достоверность 0,95
“Same as above.”
Vega 等 - 2010 - Effect of hydroxide and carbonate alkaline media o DOI: 10.1016/j.jpowsour.2010.05.030 -
Carbonyl (C=O) достоверность 0,95
“Explicit assignment: '1630.4 (carbonyl stretching)'”
Bhateja 等 - 2020 - Amelioration of Diabetes mellitus by modulation of DOI: 10.1016/j.jaim.2019.06.003 -
Carboxyl (COOH) достоверность 0,9
“Snippet: 'band at 1630 was assigned to carboxylic and aromatic groups'”
Ch'ng 等 - 2011 - Qualitative Assessment of Soil Carbon in a Rehabil DOI: 10.1100/tsw.2011.54 -
Protein beta sheet достоверность 0,9
“Explicit assignment: 'β-sheet (ca. 1,630 cm-1)'”
Damiran 和 Yu - 2011 - Molecular basis of structural makeup of hulless ba DOI: 10.3168/jds.2011-4564
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