engleski

Synthesis and alkali metal picrate extraction compatibilities of a 4-oxahexacyclo[5.4.1.0(2, 6).0(3, 1)0.0)5, 9).0(8, 11)]dodecane-derived Cryptand : a new ionophore for selective ion comlexation

The synthesis of a novel eage-functionalized cryptand, 5, and X-ray crystal structure of its 1:1 complex with Na+, i.e. 4, are reported. HOst molecule 5 displays high avidity toward Na+ and K+ picrates and appears to extract these cations selectively. The X-ray cristal structure of 4 clearly indicates that Na+ is bonded to all seven Lewis base centers (i.e., nitrogen and oxygen atoms) in the complex. In addition, the corresponding alkali metal picrate extraction profile was obtained for 10, an adamantane-containing analog of 5. With the possible exception of its ability to extract K+ picrate, there appears to be relatively little difference between the alkali metal picrate extracting capabilities of host molecule 10 and a corresponding monocyclic model system, i.e., N, N'-diethyl-4, 13-diaza-18-crown-6 (6).

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