| abstract |
Asymmetrical linear oligomers (I) are new. Asymmetrical linear oligomers of formula X-R 1>-[Ar-] n-R 2> (I): n : 4-10; Ar : optionally substituted 1,4-phenylene, 2,7-fluorenylene, 2,5-thienylene or 1,2-ethenylene; R 1>3-30C alkylene, optionally interrupted by one or more O, S, silylene, phosphonyl or phosphoryl; R 2>hydrogen or 1-20, preferably 1-12, C linear or branched alkyl, optionally interrupted as R 1>; X : optionally substituted vinyl, chloro, iodo, hydroxy, 1-3C alkoxy, (alkoxy or chloro)silyl, siloxan, carboxy, methyl- or ethyl-carbonate, formyl, methylcarbonyl, amino, amido, sulfone, sulfonic acid, halosulfonyl, sulfonate, phosphonic acid, phosphonate, trichloromethyl, tribromomethyl, (iso)cyanate, (iso)thiocyanate, cyano or nitro. Independent claims are included for: (1) two methods for preparing (I); (2) semiconductor layers that contain at least one (I); and (3) electronic components that contain at least one layer of (2). |