What absorbs at 690 cm⁻¹ in an FTIR spectrum?
A band near 690 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
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| N h | 3 | 2 | 0.9 |
| Sulfur heterocycle | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 0.9 |
| C c single bond | 1 | 1 | 0.9 |
| Metal oxygen | 1 | 1 | 0.9 |
| Chlorine | 1 | 1 | 0.9 |
| Imide | 1 | 1 | 0.6 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
这些分配背后的文献
-
Sulfur heterocycle 置信度 1.0
“Belong to thiophene ring vibrations.”
Refat 等 - 2021 - SYNTHESIS, CHARACTERIZATION, THERMAL ANALYSIS AND DOI: 10.4314/bcse.v35i1.11 -
N h 置信度 0.9
“Peak at ~690 cm-1 N-H (R= -CH2CH2CH2NH2)”
Asgari 和 Sundararaj - 2018 - Silane functionalization of sodium montmorillonite DOI: 10.1016/j.clay.2017.12.020 -
N h 置信度 0.9
“Attributed to -NH in text.”
Wang 等 - 2020 - Enhancement thermal stability and CO2 adsorption p DOI: 10.1088/2053-1591/ab6db3 -
Chlorine 置信度 0.9
“Explicit assignment: 'stretching vibration at ... C-Cl'”
Ammari 等 - 2015 - Structure and Electrical Study of New Chemically M DOI: 10.1155/2015/280325 -
Metal oxygen 置信度 0.9
“Text: 'band at 690 cm-1 corresponds to the stretching of the Ti-O bond'.”
Gouda 等 - 2021 - A Highly Selective Novel Green Cation Exchange Mem DOI: 10.3390/en14185664 -
置信度 0.9
“Snippet: 'chlorine band-stretching vibrations (VC-Cl) at 690 cm-1'.”
Mabrouki 等 - 2022 - Aminated PVC cross-linked with 2,2'-dichlorodiethy DOI: 10.14314/polimery.2022.11.8 -
C c single bond 置信度 0.9
“Band at 690 cm-1 originates from out-of-plane bend of π(CC) in phenyl ring.”
Maltesen 等 - 2011 - Multivariate Analysis of Phenol in Freeze-Dried an DOI: 10.1208/s12249-011-9618-x -
置信度 0.7
“Same list.”
Jayalekshmy 等 - 2019 - Preparation, characterization and properties of Ln DOI: 10.1007/s12034-019-1887-0
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