Intracluster electron transfer from a metal atom/cluster followed by anionic oligomerization of vinyl molecules
Department of Chemistry, Graduate School of Science, Tohoku University,
Aramaki, Aoba-ku, Sendai 980-8578, Japan
Corresponding author: a email@example.com
Published online: 15 September 2001
Intracluster electron transfer and oligomerization reaction were investigated by mass spectrometry of clusters of alkali metal atom (M) with acrylonitrile (AN; CH2=CHCN). In the photoionization mass spectra of M(AN)n, magic numbers were clearly observed at n=3k (k=1-4 for M = Na and K, k=1 for M = Li). The results of photodissociation of neutral K(AN)n indicate that the n=3 cluster has an anomalous stability relative to other sizes of clusters. The C=C bond in vinyl molecules is also found to be necessary to form the magic numbers by measuring the photoionization mass spectrum of K atom with propionitrile. These results strongly support the intracluster anionic oligomerization reaction initiated by electron transfer from the alkali atom. The quantum chemical calculations have revealed that the evaporation induced by excess energy generated by intracluster oligomerization is important to form the magic numbers in the present clusters.
PACS: 36.40.-c – Atomic and molecular clusters / 36.40.Jn – Reactivity of clusters / 36.40.Mr – Spectroscopy and geometrical structure of clusters / 82.35.-x – Polymer: properties; reactions; polymerization
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001