Ionic Liquids
Ionic Liquids - Related Videos
10:42
Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Cited by 65 •
2016
The pretreatment of lignocellulosic biomass with protic low-cost ionic liquids is shown, resulting in a delignified cellulose-rich pulp and a purified lignin. The pulp gives rise to high glucose yields after enzymatic saccharification.
06:44
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Cited by 2 •
2018
A protocol for the synthesis of a new type of mesogens, based on the halogen-bonded supramolecular anion [CnF2n+1-I···I···I-CnF2n+1]−, is reported.
11:04
Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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Cited by 1 •
2016
Here, we describe protocols to prepare phosphonium-based ionic liquid and lithium bis(trifluoromethane)sulfonimide salt electrolytes, and assemble a non-flammable and high temperature functioning lithium-ion coin cell battery.
05:59
Green Synthesis of Quinoline-Based Ionic Liquid
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Cited by 1 •
2024
In the present work, we elucidate the green synthesis of quinoline-based Ionic Liquid (IL), namely, 1-Hexadecylquinolin-1-ium bromide {[C16quin]Br} by mixing quinoline with an excess of 1-Bromohexadecane, along with its detailed characterization using Nuclear Magnetic Resonance and Infrared spectroscopic measurements.
03:10
Ionic Radii
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2020
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
FAQs
Bulky, asymmetric cations and anions interfere with efficient crystal packing, reducing the structural order needed for a salt to melt only at higher temperatures. This packing disruption explains why changing ion size and asymmetry can alter the liquid’s melting behavior and help maintain a liquid state near ambient conditions.
Changing either ion allows researchers to tune viscosity, miscibility, thermal stability, polarity, and chemical reactivity. These adjustments arise from the selected combination of cation and anion rather than from a single fixed solvent structure. Consequently, researchers can match an ionic liquid’s physical and chemical behavior to a particular reaction, separation, or energy-related function.
Unlike conventional molecular solvents, ionic liquids have negligible vapor pressure because they consist entirely of ions. Their ionic composition also provides electrical conductivity and adjustable polarity, allowing them to function in settings where volatility, charge transport, or solvent selectivity matters. The comparison is therefore based on coordinated physical and chemical properties, not simply on liquid-state behavior.
In chemistry, ionic liquids can serve as reaction media, catalysts, or solvents for dissolving and processing materials. Their adjustable polarity and chemical reactivity can influence how they interact with reactants, while their negligible vapor pressure distinguishes them from many conventional reaction solvents. These roles make them useful components of tailored chemical processing rather than passive liquid carriers.
Selection begins by matching the required property to the intended task. A reaction may require suitable polarity or chemical reactivity, an extraction process may depend on miscibility and phase behavior, and an electrolyte may require ionic conductivity. Researchers can then vary the cation and anion to adjust viscosity, thermal stability, and related performance characteristics.
Ionic liquids are used in synthesis, separations, energy storage, and sustainable chemical processing. Within these areas, they can act as reaction media, catalysts, extraction phases, electrolytes, or solvents for dissolving and processing materials. Their utility comes from combining adjustable molecular interactions with ionic conductivity and negligible vapor pressure in one tunable system.
Their negligible vapor pressure and adjustable properties support the design of alternatives to conventional molecular solvents for chemical processing. Researchers can tune polarity, miscibility, viscosity, thermal stability, and reactivity for particular synthesis or separation tasks. This flexibility connects ionic liquids with sustainable processing strategies while also supporting applications in materials handling and energy-related chemistry.