Anion photoelectron spectroscopy and density functional investigation of diniobium-carbon clusters.
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.
Knappenberger
K L
KL
Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA.
Clayborne
Andre Z
AZ
Reveles
J U
JU
Sobhy
M A
MA
Jones
C E
CE
Gupta
U U
UU
Khanna
S N
SN
Iordanov
I
I
Sofo
J
J
Castleman
A W
AW