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Li(NH3)B3H8: a new ionic liquid octahydrotriborate
Xiongfei Zheng1, Yanjing Yang, Mengxuan Li
1Department of Materials Science, Fudan University, Shanghai, 200433, China. gyh@fudan.edu.cn.
Chemical Communications (Cambridge, England)
|December 14, 2018
Summary
Researchers developed a new ionic liquid octahydrotriborate, Li(NH3)B3H8, using a simple synthesis. This novel material exhibits a low freezing point below -33.4 °C, making it a promising functional liquid.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Solid-State Chemistry
Background:
- Ionic liquids offer unique properties for various applications.
- Octahydrotriborate anions (B3H8-) are of interest for their potential in energy storage and as chemical reagents.
- Developing stable and functional octahydrotriborate ionic liquids remains a challenge.
Purpose of the Study:
- To devise a strategy for constructing ionic liquid octahydrotriborates using small cations.
- To synthesize and characterize a novel lithium-containing octahydrotriborate ionic liquid.
- To evaluate the thermal properties and structural characteristics of the new compound.
Main Methods:
- Synthesis of Li(NH3)B3H8 via a facile reaction between ammonium octahydrotriborate (NH4B3H8) and lithium hydride (LiH).
- Determination of the freezing point of the synthesized ionic liquid.
- Crystallographic analysis to determine the unit cell and lattice parameters of the crystallized compound.
Main Results:
- A novel ionic liquid, Li(NH3)B3H8, was successfully synthesized.
- The compound exhibited a low freezing point below -33.4 °C.
- X-ray crystallography revealed a monoclinic unit cell with specific lattice parameters (a = 8.813(1) Å, b = 8.8626(1) Å, c = 8.2076(1) Å, β = 110.1046(5)°).
Conclusions:
- The strategy of using small cations is effective for constructing ionic liquid octahydrotriborates.
- Li(NH3)B3H8 is a promising functional liquid octahydrotriborate with high B3H8- content and a low freezing temperature.
- The findings open new avenues for the development of advanced octahydrotriborate-based materials.
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