Photoionization Time-of-Flight Mass Spectra of Aluminum Clusters-Associated Complexes

Using a laser vaporization/pulsed molecular beam source, photoionization time-of-flight mass spectra of bare aluminum clusters Al_n (n up to larger than 70) and of carbon-, oxygen-, and hydrogen-adducted aluminum clusters-associated complexes are detected. The cause of the observed odd-even alternation in reactivity of Al_n and the formation mechanism of the informative products are discussed.