Ortho-Metallation as a key step for the synthesis of silyl substituted Po1y(p-pheny1eneviny1ene)s

摘要

A new synthetic pathway for the preparation of silyl substituted poly(p-phenylenevinylene) (PPV) precursors has been investigated. By using directed ortho-metallation, it has been possible to significantly improve the overall yields for the synthesis of mono- and disubstituted silyl monomers. We have also synthesised a new unsymmetrically substituted monomer. From these monomers we have synthesised the following polymers; DMOS-PPV 1 (DiMethylOctlylSilyl-PPV), BDMOS-PPV 2 (Bis-(DiMethylOctlylSilyl)-PPV)), BDMDS-PPV 3 (Bis-(DiMethylDecyllSilyl))-PPV and C8C10-PPV (2-(dimethyloctylsilyl)-5-(dimethyldecylsilyl))-PPV 4.