In:
The Journal of Chemical Physics, AIP Publishing, Vol. 115, No. 11 ( 2001-09-15), p. 5170-5178
Abstract:
We investigated a series of mono-niobium carbide clusters, NbCn− (n=2–7), using anion photoelectron spectroscopy. Vibrationally resolved photoelectron spectra were observed for NbC2− and NbC3−, which were both shown to have cyclic C2v structures. Two isomers were observed for NbC4− and NbC5−. The weak and low electron binding energy isomers were shown to be cyclic structures forming a series with NbC2− and NbC3−, and all have similar and low electron binding energies. The main isomers of NbC4− and NbC5−, which possess much higher electron binding energies, were shown to be due to linear structures, which form a series with NbC6− and NbC7−. All the linear NbCn− clusters were observed to have high electron binding energies and exhibit an even–odd alternation, similar to that observed for pure linear carbon clusters in the same size range. A cyclic to linear structural transition was thus observed for the NbCn− clusters from NbC3− to NbC4−, with the cyclic structures favored for the smaller clusters and the linear isomers favored for the larger clusters.
Type of Medium:
Online Resource
ISSN:
0021-9606
,
1089-7690
Language:
English
Publisher:
AIP Publishing
Publication Date:
2001
detail.hit.zdb_id:
3113-6
detail.hit.zdb_id:
1473050-9
