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Open Access Effects of the Wire Length on H-Atom Transfer in 7-Hydroxyquinoline·(NH3)n: n = 2 and 3

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Previously we have employed the 7-hydroxyquinoline·(NH3)n ammonia-wire clusters to study excited state H-atom transfer along a sequence of hydrogen bonds. H-atom transfer experimentally occurs for n = 4 excited to its vibrationless S1 state, for n = 3 with additional excitation of ammonia-wire vibrations (~200cm–1). However, for the n = 2 cluster, no reaction is observed, even with additional excitation energy of 900cm–1. CIS calculations have been performed on the n = 2 and n = 3 clusters to understand the effect of the wire length on the energy profile of the reaction. The enol keto reaction is always exoergic, and the barrier for H transfer to the proximal ammonia controls the reaction kinetics.
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Document Type: Editorial

Publication date: May 1, 2004

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  • International Journal for Chemistry and Official Membership Journal of the Swiss Chemical Society (SCS) and its Divisions

    CHIMIA, a scientific journal for chemistry in the broadest sense, is published 10 times a year and covers the interests of a wide and diverse readership. Contributions from all fields of chemistry and related areas are considered for publication in the form of Review Articles and Notes. A characteristic feature of CHIMIA are the thematic issues, each devoted to an area of great current significance.

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