Method of preparing derivatives of polyarylene vinylene and method of preparing an electronic device including same
View Patent ↗A technique is described for the preparation of polymers according to a process in which the starting compound of formula (I) is polymerized in the presence of a base in an organic solvent. No end chain controlling agents are required during the polymerization to obtain soluble precursor polymers. The precursor polymer such obtained comprises structural units of the formula (II). In a next step, the precursor polymer (II) is subjected to a conversion reaction towards a soluble or insoluble conjugated polymer by thermal treatment. The arylene or heteroarylene polymer comprises structural units of the formula III. In this process the dithiocarbamate group acts as a leaving group and permits the formation of a precursor polymer of structural formula (II), which has an average molecular weight from 5000 to 1000000 Dalton and is soluble in common organic solvents. The precursor polymer with structural units of formula (II) is thermally converted to the conjugated polymer with structural formula (III).
1. A precursor polymer compound having a formula:
wherein Ar is an aromatic divalent group or a heteroaromatic divalent group, wherein R 0 is an aryloxy group, and wherein each of R 1 , R 2 , R 3 and R 4 is independently selected from the group consisting of hydrogen, a C 1 -C 20 -alkyl group, a cyclic C 3 -C 20 -alkyl group, an aryl group, an alkylaryl group, an arylalkyl group, and a heterocyclic group, or R 1 and R 2 are linked together to form a cycle, and wherein n is an integer from 5 to 2000.
2. The precursor polymer of claim 1 , wherein Ar is an aromatic divalent group having from 4 to 20 carbon atoms, wherein Ar is unsubstituted or substituted with one or more substituents independently selected from the group consisting of C 1 -C 20 -alkyl, C 3 -C 20 -alkoxy, C 1 -C 20 -alkylsulfate, a phenyl group and a benzyl group, and wherein Ar comprises from 0 to 4 heteroatoms selected from the group consisting of oxygen, sulfur, and nitrogen.
3. The precursor polymer of claim 1 , wherein Ar is a phenyl group.
4. The precursor polymer of claim 1 , wherein Ar is 1,4-phenylene.
5. The precursor polymer of claim 1 , wherein Ar is 2,5-thienylene.
6. The precursor polymer of claim 1 , wherein R 3 and R 4 are each hydrogen.
7. The precursor polymer of claim 1 , wherein Ar is selected from the group consisting of 1,4-phenylene; 2,6-naphthalenediyl; 1,4-naphthalenediyl; 1,4-anthracenediyl; 2,6-anthracenediyl; 9,10-anthracenediyl; 2,5-thienylene; 2,4-thienylene; 2,3-thienylene; 2,5-furanediyl; 2,5-pyrrolediyl; 1,3,4-oxadiazole-2,5-dyil; 1,3,4-thiadiazole-2,5-diyl; 2,5-benzo[c]thienylene; thieno[3,2-b]thiophene-2,5-diyl; pyrrolo[3,2-b]pyrrole-2,5-diyl; pyrene-2,7-diyl; 4,5,9,10-tetrahydropyrene-2,7-diyl; 4,4′-bi-phenylene; phenantrene-2,7-diyl; 9,10-dihydrophenantrene-2,7-diyl; dibenzofurane-2,7-diyl; and dibenzothiophene-2,7-diyl.
8. The precursor polymer of claim 1 , having an average molecular weight of from 5000 Daltons to 1000000 Daltons.
9. The precursor polymer of claim 1 , having a polydispersity of from 1.5 to 5.5.
10. The precursor polymer of claim 1 , having a polydispersity below 2.
11. The precursor polymer of claim 1 , having a polydispersity of from 1.5 to 2.