Cyclically-bound ladder polymers of cyclic diacetylene tetramers

摘要

Cyclically-bound ladder polymers obtained from cyclic tetramers having the formula [C 3BOND C - (CH2)n - C 3BOND C4 wherein n is an integer from 3 to 10. Polymerization proceeds by 1,4-addition reaction at each diacetylene group to produce four fully-conjugated chains joined together pairwise via a total of four -(CH2)n - interchain linkages per 4.8A. polymer repeat length. Resulting from the particular crystal phases used as reaction matrices, these polymers are substantially free of unreacted diacetylene groups, as indicated by substantial absence of Raman vibration at about 2255 cm-1, and are highly chain aligned.