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The metal complexes of polyaza cryptand have attracted much attentionowing to their special structure, unusual photo-chemical, electrical and catalyticproperties. Recently, Lehn and Nelson synthesized successively a series ofcryptands and crypatates with high yield by (2+3) schiff-base condensation of tris(2-aminoethyl)amine and aryl dialdehyde. But so far, little work about the analogueswith larger cavities and flexible chains condensed by tris (3-aminopropyl) amine (abbr.
The metal complexes of polyaza cryptand have attracted much attention to the special structure, unusual photo-chemical, electrical and catalytic properties. Recently, Lehn and Nelson synthesized successively a series of cryptands and crypatates with high yield by (2 + 3) schiff-base condensation of But so far, little work about the analogues with larger cavities and flexible chains condensed by tris (3-aminopropyl) amine (abbr.