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Proceedings Paper

Laser Studies of the Reactivity of Small Niobium Clusters with Benzene
Author(s): R. J. St. Pierre; E. L. Chronister; M. A. EI-Sayed
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Paper Abstract

Using a laser vaporization flow reactor apparatus, small niobium clusters (Nbx, x = 1-15) are reacted with benzene and detected with an excimer laser (ArF) photoionization time-of-flight mass spectrometer. At low ionizing laser intensities, the probability of dehydrogenation of NbxC6H6 clusters to NbxC6 is found to be a maximum for x = 5, 6 and 11 and a minimum for x < 4 as well as for clusters with 8 and 10 niobium atoms. As the ionizing laser intensity increases, it is possible to photochemically drive the dehydrogenation reaction of the x = 7, 9, 12, 13 clusters with one extra photon above ionization while the x = 8 and 10 clusters are found to require two photons above ionization. These results are discussed in terms of the stabilities of these clusters relative to their photochemical ionic products.

Paper Details

Date Published: 1 January 1987
PDF: 10 pages
Proc. SPIE 0742, Laser Applications to Chemical Dynamics, (1 January 1987); doi: 10.1117/12.966914
Show Author Affiliations
R. J. St. Pierre, University of California at Los Angeles (United States)
E. L. Chronister, University of California at Los Angeles (United States)
M. A. EI-Sayed, University of California at Los Angeles (United States)

Published in SPIE Proceedings Vol. 0742:
Laser Applications to Chemical Dynamics
Mostafa A. El-Sayed, Editor(s)

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