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Synthesis of Nanoporous Cubic In(CN)(3) and In(1)(-)(x)()Ga(x)()(CN)(3) and Corresponding Inclusion Compounds
Darrick Williams1, J. Kouvetakis, M. O'Keeffe
1Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287.
Inorganic Chemistry
|October 24, 2001
Summary
Researchers synthesized indium(III) cyanide (In(CN)3) with empty Prussian-blue-type structures. This porous material can reversibly incorporate gases like krypton and n-hexane within its framework.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Crystallography
Background:
- Prussian blue analogues are known for their versatile structures and applications.
- Developing novel porous materials with tunable properties is crucial for gas storage and separation.
Purpose of the Study:
- To synthesize and characterize anhydrous indium(III) cyanide (In(CN)3) and its gallium-substituted analogues.
- To investigate the structural properties and guest inclusion capabilities of these novel Prussian blue-type materials.
Main Methods:
- Low-temperature solution synthesis utilizing molecular templating agents.
- Quantitative X-ray powder diffraction for structural refinement.
- Gas incorporation experiments with krypton and n-hexane.
Main Results:
- Anhydrous In(CN)3 with a cubic Prussian-blue-type structure (space group Pm-3m, a = 5.627(1) Å) was successfully synthesized.
- The material exhibits reversible krypton and n-hexane incorporation into its cavities.
- In(1-x)Gax(CN)3 solid solutions were formed with lattice constants tunable between Ga(CN)3 and In(CN)3, obeying Vegard's Law.
Conclusions:
- The synthesized In(CN)3 and its Ga-substituted analogues are promising porous materials with tunable structures.
- The ability to incorporate guest molecules highlights their potential for gas storage and separation applications.