Three
derivatives of 4,7-substituted [2.2.2]paracyclophane-trienes
were synthesized and used in ring-opening metathesis polymerization
(ROMP), resulting in well-soluble poly(para-phenylenevinylene)s
(PPV). The paracyclophane-trienes were prepared using an iterative
buildup of a phenylene–ethynylene backbone, followed by a cis
selective Grignard reduction and an intramolecular McMurry reaction.
The monomers were applied in ROMP to result in well-soluble PPV derivatives
with an unusual substituent pattern. The PPVs were spin-coated into
amorphous, highly fluorescent films. To the best of our knowledge,
we are the first to synthesize 4,7-substituted [2.2.2]paracyclophane-trienes
and use them as ROMP monomers.
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