Anion photoelectron spectroscopy and density functional investigation of diniobium-carbon clusters.
basic_science · Level V
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- Record sourced from PubMed, PMID 19206683.
- Also identified by DOI 10.1021/nn700167c.
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Abstract
Experimental photoelectron and computational results show diniobium-carbon (Nb(2)C(n)) clusters to coexist in multiple structural isomers: three-dimensional geometries, planar rings, and linear chains. Three-dimensional clusters having up to five carbons are formed preferentially with Nb-Nb bonding, whereas only Nb-C bonding is observed experimentally at six carbons. Clusters consisting of an odd number of atoms are also observed with linear geometries. The larger binary clusters (n > or = 7) display properties similar to those of pure carbon clusters. We provide evidence for niobium substitution of carbon atoms.