What absorbs at 1646 cm⁻¹ in an FTIR spectrum?
A band near 1646 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 |
|---|---|---|---|
| Amide | 6 | 5 | 0.9 |
| Hydroxyl (O-H) | 4 | 4 | 0.9 |
| Carbonyl (C=O) | 3 | 3 | 0.9 |
| Water (H2O) | 2 | 2 | 0.9 |
| Aldehyde (CHO) | 1 | 1 | 0.9 |
| Ring structure | 1 | 1 | 0.9 |
| Amine primary | 1 | 1 | 0.9 |
| Alkene (C=C) | 1 | 1 | 0.8 |
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
-
信心 0.95
“Explicit assignment in text.”
Hassanin 等 - 2022 - Sustainable Remedy Waste to Generate SiO2 Function DOI: 10.3390/su14052699 -
Hydroxyl (O-H) 信心 0.9
“Text: 'band at 1646 is attributed ... bonded hydroxyl groups'”
Han 等 - 2012 - Synthesis, characterization and functional propert DOI: 10.1016/j.ijbiomac.2012.02.030 -
Carbonyl (C=O) 信心 0.9
“Explicit: 'Peak shifting for C=O ... to 1646'.”
Jothi 等 - 2021 - Investigations of biodegradable polymer blend elec DOI: 10.1007/s10854-021-05266-1 -
Hydroxyl (O-H) 信心 0.9
“Explicit: 'At 1646 the bending vibration of OH (water) and the O stretching band cm-1. -NH2'”
Aguirre-Loredo 等 - 2023 - Improvements of thermal and mechanical properties DOI: 10.1016/j.heliyon.2023.e16782 -
Water (H2O) 信心 0.9
“Peak at 1646 assigned to water.”
Anjos 等 - 2016 - FTIR-ATR spectroscopy applied to quality control o DOI: 10.1016/j.foodchem.2016.02.128 -
Amide 信心 0.9
“Explicitly stated as amide I band peak.”
Hladilkova 等 - 2013 - Effects of End-Group Termination on Salting-Out Co DOI: 10.1021/jz4022238. -
信心 0.9
“Explicit assignment in text”
Kiran 等 - 2019 - Lignin Degrading System of Phanerochaete chrysospo DOI: 10.15244/pjoes/89575 -
Amide 信心 0.9
“Explicit assignment: '1646 (amide-I, illustrating C=O stretching)'.”
Nilsuwan 等 - 2016 - Influence of palm oil and glycerol on properties o DOI: 10.1007/s13197-016-2243-7
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