A compound represented by the following Formula 1: wherein each R is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted, wherein R may be connected to one of the two benzene rings of Formula 1 to form a ring together with the Si atom of the aminosilyl group; R' is a methylene group; each R 1 is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted; each R 2 is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted, wherein the R 2 groups may be connected to each other to form a ring together with the Si-bonded nitrogen atom; R 3 and R 4 are each independently selected from hydrogen, methyl, ethyl, propyl, butyl and vinyl, in particular from hydrogen, methyl and vinyl, and are preferably both hydrogen; each R 5 is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted, a C 1 -C 6 alkoxy group, a C 1 -C 6 alkylthio group, and an amine group carrying two substituents independently selected from a C 1 -C 6 alkyl group and a silyl group carrying three substituents independently selected from a C 1 -C 6 alkyl group and a phenyl group, wherein "alkyl" includes straight chain alkyl, branched alkyl and cycloalkyl; a ≥ 1; b ≥ 0; a + b ≤ 10; m = 0 or 1; n = 0 to 12; x = 0, 1 or 2; y = 1, 2 or 3; z = 0, 1 or 2; x + y + z = 3; or x + y + z = 2 when the silicon atom of the aminosilyl group is bonded twice to the benzene rings via groups R' or single bonds; with the proviso that when m = 1, then n = 1 to 12, and when m = n = 0, then x = 1 or 2; wherein the aminosilyl group(s) may be bonded to any of the two benzene rings, plural aminosilyl groups may be different from each other, and the R 5 group(s) may be bonded to any of the two benzene rings. each R is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted, wherein R may be connected to one of the two benzene rings of Formula 1 to form a ring together with the Si atom of the aminosilyl group; R' is a methylene group; each R 1 is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted; each R 2 is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted, wherein the R 2 groups may be connected to each other to form a ring together with the Si-bonded nitrogen atom; R 3 and R 4 are each independently selected from hydrogen, methyl, ethyl, propyl, butyl and vinyl, in particular from hydrogen, methyl and vinyl, and are preferably both hydrogen; each R 5 is independently selected from a C 1 -C 12 aliphatic group and a C 3 -C 12 aromatic group, each of which may optionally be substituted, a C 1 -C 6 alkoxy group, a C 1 -C 6 alkylthio group, and an amine group carrying two substituents independently selected from a C 1 -C 6 alkyl group and a silyl group carrying three substituents independently selected from a C 1 -C 6 alkyl group and a phenyl group, wherein "alkyl" includes straight chain alkyl, branched alkyl and cycloalkyl; a ≥ 1; b ≥ 0; a + b ≤ 10; m = 0 or 1; n = 0 to 12; x = 0, 1 or 2; y = 1, 2 or 3; z = 0, 1 or 2; x + y + z = 3; or x + y + z = 2 when the silicon atom of the aminosilyl group is bonded twice to the benzene rings via groups R' or single bonds; with the proviso that when m = 1, then n = 1 to 12, and when m = n = 0, then x = 1 or 2; wherein the aminosilyl group(s) may be bonded to any of the two benzene rings, plural aminosilyl groups may be different from each other, and the R 5 group(s) may be bonded to any of the two benzene rings.