| abstract |
A compound suitable for use as a charge transport compound in organic photoconductors or as a charge control agent in electrophotographic toners. The compound, in the neutral form, is of the Formula (1): <IMAGE> Formula (1) wherein: Ar is of formula (a), (b) or (c) <IMAGE> (a) <IMAGE> (b) or <IMAGE> (c) each L independently is H, C1-4-alkyl or halo; R1, R3 and R4 are each independently alkyl, substituted alkyl, aryl, substituted aryl, aralkyl, substituted aralkyl, cycloalkyl or allyl; R2 is an alkyl, aralkyl, cycloalkyl, allyl or aryl group which is unsubstituted or substituted by a group defined by X4; and X1, X2, X3, X4 & X5 are each independently H or a group capable of stabilising a positive charge on the adjacent carbon atom. |