Organic semiconductor polymer
OwnerLei Fang, Jongbok Lee +1inventors
InventorsLei Fang, Jongbok Lee, Mohammed Al-Hashimi
Life of this patent
Estimating the term…
Abstract
The organic semiconductor polymers relates to the synthesis of a carbazole-based ladder polymer. The synthesis of the ladder polymer includes forming a precursor conjugated polymer by Suzuki step growth polymerization of 2,7-dibromocarbazole with 1,4-dibromo-2,5-divinylbenzene, followed by end capping with 2-bromostyrene and 2-vinyl-phenylboronic acid. Then, the pendent vinyl groups are closed by ring-closing olefin metathesis to obtain the ladder polymer.
Claims4
A method for synthesis of an organic semiconductor polymer, comprising the steps of:
- polymerizing a monomer having the formula:
- by Suzuki step growth polymerization with 1,4-dibromo-2,5-divinylbenzene to obtain an intermediate;
- adding 2-bromostyrene and 2-vinyl-phenylboronic acid to the intermediate to obtain a precursor conjugated polymer having the formula:
- adding Grubbs' second generation catalyst to the precursor conjugated polymer to obtain a reaction mixture;
- stirring the reaction mixture at reflux temperatures;
- adding another portion of Grubbs' second generation catalyst to the refluxing reaction mixture by syringe pump over a period of at least four hours to obtain a raw ladder polymer by ring-closing olefin metathesis;
- and
- washing and purifying the raw ladder polymer by extraction and recrystallization to obtain the organic semiconductor polymer.
A ladder polymer, comprising a conjugated polymer having the formula:
Dependencies are inferred from the claim text.