How can you identify ionic liquids from FTIR?
This page summarizes the recurring FTIR evidence reported for ionic liquids, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 12 cited sources
Quick answer
ionic liquids is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| 작용기 | 증거 |
|---|---|
| Alkyl C-H | 7 |
| Hydroxyl (O-H) | 4 |
| Metal oxygen | 3 |
| Ring structure | 2 |
| Alkene (C=C) | 1 |
| Silicon-oxygen (Si-O) | 1 |
| Silicon (Si) | 1 |
| Aromatic ring | 1 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of ionic liquids, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
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ionic liquids
Nadeem 等 - 2010 - Solvent-free synthesis of benzothiazole-based quat DOI: 10.3998/ark.5550190.0011.703 -
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ionic liquids
Sharma 等 - 2012 - Equimolar Carbon Dioxide Absorption by Ether Funct DOI: 10.5012/bkcs.2012.33.7.2325 -
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ionic liquids
Swiatek 等 - 2021 - Novel Naproxen Salts with Increased Skin Permeabil DOI: 10.3390/pharmaceutics13122110 -
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Ionic Liquids
Dawelbeit 和 Yu - 2021 - Tentative Confinement of Ionic Liquids in Nylon 6 DOI: 10.1021/acsomega.0c04740 -
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ionic liquids
Ionic liquids as novel quartz collectors: Insights from experiments and theory DOI: 10.1016/j.cej.2015.03.050 -
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ionic liquids
Moumene 等 - 2014 - Vibrational spectroscopic study of ionic liquids DOI: 10.1016/j.molstruc.2014.02.034 -
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ionic liquids
Jaworska 等 - 2017 - Modification of Chitin Particles with Ionic Liquid DOI: 10.1155/2017/3961318 -
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ionic liquids
Gamma and heavy ion radiolysis of ionic liquids: A comparative study DOI: 10.1016/j.jnucmat.2014.06.056 -
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ionic liquids
Boyd 等 - 2019 - Ionic liquids tethered to a preorganised 1,2-diami DOI: 10.1039/C9GC00089E -
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ionic liquids
Gong 等 - 2015 - What causes extended layering of ionic liquids on DOI: 10.1039/c5sc00832h
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