Novel charge transport materials having heteroaromatic hydrazone groups

A charge transport material (m1) having a phenothiazine, phenoxazine or phenazine hydrazone structure is new. A charge transport material (m1) of formula (I) is new. R2-N(R1)-N=C(R6)-Y1-X-Y2-C(R5)=N-N(R4)-R3 (I) X : linking group; Y1,Y2phenothiazine, phenoxazine or phenazine; R1-R4alkyl, alkenyl, heterocyclic or aromatic group; R5,R6H or R1. Independent claims are included for the following: (1) an organophotoreceptor (R1) comprising an electrically conductive substrate (s1) and a photoconductive element (e1) on (s1), where (e1) comprises (m1) and a charge generating compound (c1); (2) an electrophotographic imaging apparatus (A1) comprising a light imaging component and (R1) to receive light from the imaging component; and (3) an electrophotographic imaging process involving applying an electrical charge to a surface of (R1), imagewise exposing the surface of (R1) to radiation to dissipate charge in selected areas and to form a pattern of charged and uncharged areas on the surface, contacting the surface to