Oligomeric derivatives of spirobifluorene, their preparation and use

SBF derivatives, which can be represented with the following formula: SBF-X wherein: with m=0, 1, 2 or 3; p=positive integer, preferably 1, 2 or 3, with (p+1) being the valency of K; n=positive integer, preferably 1, 2 or 3; L: is the same or different and independently represents C, PR, AsR, SbR, BiR, S, Se, Te, S-Y, Se-Y or Te-Y; Y: is the same or different and independently represents O, S, Se or Te; K: is the same or different and independently represents a chemical bond or a group selected from O, S, BR(2-p), N, NR(2-p), R(2-p)P-O, B3O3, (PR)3N3, CR(3-p), CR(3-p)(C6H4)(p+1), SiR(3-p)(C6H4)(p+1) with (2-p) and (3-p) being a positive integer including zero; alkene, substituted alkene, alkyne, substituted alkyne, aromatic or R substituted aromatic, heteroaromatic or R substituted heteroaromatic or a group resulting from benzene and non benzene, monocyclic and polycyclic hydrocarbons, which can be bivalent, trivalent or of higher valency; or a combination of two, three or four of the above mentioned groups; SBF: spiro-compound of formula (I): R, A, B, C, D: is the same or different and independently represents H, deuterium, F, Cl, Br, I, CN, a linear, branched or cyclic alkyl, alkoxy or thioalkoxy chain with 1 to 40 carbon atoms, which can be substituted by R1 and in which one or more non-neighbouring carbon atoms can be replaced by N-R1, O, S, C-O, C-S, C-NR1, Si(R1)2, Ge(R1)2, O-CO-O, CO-O, CO-NR1, -CR1-CR1- or -C[identical to]C- and in which one or more H-atoms can be replaced by F, Cl, Br, I or CN, or an aromatic or heteroaromatic ring system with 5 to 40 aromatic ring atoms, which can be substituted by deuterium, F, Cl, Br, I, CN or one or more substituents R1, or a combination from two, three or four of these systems; two or more substituents R can form a further monocyclic or polycyclic aliphatic or aromatic ring system with each other; R1: is the same or different and independently represents H or an aliphatic or aromatic hydrocarbon rest with 1 to 20 C-atoms.