What absorbs at 1693 cm⁻¹ in an FTIR spectrum?
A band near 1693 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
可能的官能基指派
| 官能基 | 支持事實 | 引用來源 | 最高信心 |
|---|---|---|---|
| Carbonyl (C=O) | 4 | 3 | 1.0 |
| Protein beta sheet | 3 | 3 | 0.9 |
| Carboxyl (COOH) | 1 | 1 | 0.6 |
| Alkyl C-H | 1 | 0 | 0.9 |
| Alkene (C=C) | 1 | 0 | 0.9 |
排名反映累積的文獻證據，而非單一權威規則。請務必根據您的樣品背景進行確認。
這些指派背後的文獻
-
Carbonyl (C=O) 信心 1.0
“carbonyl band centred at 1693”
Ferrant 等 - 2022 - An innovative multi-analytical strategy to assess DOI: 10.1016/j.culher.2022.04.007 -
信心 0.9
“Band at 1693 associated with extractives content.”
Funda 等 - 2020 - Predicting the chemical composition of juvenile an DOI: 10.1007/s00226-020-01159-4 -
Carbonyl (C=O) 信心 0.9
“Explicitly assigned to C=O stretching of TEL and TEL/HCl.”
Park 等 - 2019 - Investigation of Crystallization and Salt Formatio DOI: 10.3390/pharmaceutics11030102 -
Protein beta sheet 信心 0.9
“Explicit assignment in text: 'antiparallel β-sheets ... play a characteristic band around 1693 cm-1'”
Roehr 等 - 2020 - Label-free vibrational imaging of different A beta DOI: 10.1186/s40478-020-01091-5 -
Protein beta sheet 信心 0.9
“Text states 'local minima at about 1693 ... assigned to antiparallel β-sheet'.”
Szulc 等 - 2021 - Variability of Amyloid Propensity in Imperfect Rep DOI: 10.3390/ijms22105127 -
Protein beta sheet 信心 0.8
“Characteristic peak for β-sheet.”
Bandeira 等 - 2022 - Micro-Fourier-transform infrared reflectance spect DOI: 10.1038/s41598-022-08156-6 -
Carboxyl (COOH) 信心 0.6
“Displacement of peak of carboxyl group of folic acid.”
Varshosaz 等 - 2014 - Synthesis and characterization of folate-targeted DOI: 10.1155/2014/525684 -
Carbonyl (C=O) 信心 0.5
“Same as above.”
Eltayb 等 - 2022 - Preparation and characterization of Meta-bromo-thi DOI: 10.1016/j.jsps.2022.05.008
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