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Gas phase, solution, and solid state alkali ion binding by the [NbE8](3-) (E = As, Sb) complexes: synthesis,
Banu Kesanli1, James Fettinger, Brian Scott
1Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742 , USA.
Inorganic Chemistry
|June 23, 2004
Summary
New niobium-chalcogenide complexes, [NbAs(8)](3-) and [NbSb(8)](3-), were synthesized. These novel clusters feature central niobium atoms within S(8)-like E(8) rings and selectively bind cesium ions.
Area of Science:
- Inorganic Chemistry
- Coordination Chemistry
- Materials Science
Background:
- Niobium-chalcogenide chemistry is an emerging field with potential applications.
- Synthesis of novel cluster compounds with unique structural motifs is of significant interest.
Purpose of the Study:
- To synthesize and characterize novel niobium-chalcogenide cluster anions.
- To investigate the structural features and ion-binding properties of these new complexes.
Main Methods:
- Reaction of Nb(toluene)2 with K3E7 (E = As, Sb) in the presence of 2,2,2-crypt.
- Characterization using 133Cs NMR spectroscopy, electrospray ionization mass spectrometry (ESI-MS).
- Single-crystal X-ray diffraction for structural determination.
Main Results:
- Successful synthesis of [NbAs8](3-) and [NbSb8](3-) cluster anions in low yields.
- Structural elucidation revealing S(8)-like E8 rings with a central Nb atom.
- Observation of selective Cs+ binding by the [NbAs8](3-) anion in solution and gas phase.
Conclusions:
- The study reports the first synthesis of niobium-chalcogenide clusters with S(8)-like E8 rings.
- The [NbAs8](3-) anion exhibits selective complexation with Cs+, highlighting potential applications in ion separation.