Laser Studies of the Reactivity of Small Niobium Clusters with Benzene

R. J. St. Pierre; E. L. Chronister; M. A. EI-Sayed

doi:10.1117/12.966914

1 January 1987 Laser Studies of the Reactivity of Small Niobium Clusters with Benzene

R. J. St. Pierre, E. L. Chronister, M. A. EI-Sayed

Proceedings Volume 0742, Laser Applications to Chemical Dynamics; (1987) https://doi.org/10.1117/12.966914
Event: OE LASE'87 and EO Imaging Symposium, 1987, Los Angeles, CA, United States

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 Nb_xC₆H₆ clusters to Nb_xC₆ 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.

Citation Download Citation

R. J. St. Pierre, E. L. Chronister, and M. A. EI-Sayed "Laser Studies of the Reactivity of Small Niobium Clusters with Benzene", Proc. SPIE 0742, Laser Applications to Chemical Dynamics, (1 January 1987); https://doi.org/10.1117/12.966914

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