. . . . . . . . . . "wherein: Z is O, S, NH or NR1; each J is the same or different and is H, deuterium (D), R1, OR1, SR1, NHR1, N(R1)2, fluorine, chlorine, bromine or iodine; W is an atom or group that is located ortho, meta or para to the ring nitrogen and is NH, N???R1, N???R2, P???R1, P???R2, O or S; each carbon of the heterocyclic ring has the formula CJ2; each R1 is the same or different and is an alkyl group co" .