directing molecule; R11 is alkyl, alkenyl, oxyalkyl or hydroxyalkyl having up to about 3 carbon atoms and having rotational flexibility around a first-bound carbon atom; where R6 and R9 are other than hydrogen, then R5 and R10 are hydrogen or methyl; and where R5 and R10 are other than hydrogen, then R6 and R9 are hydrogen, hydroxyl, or halide other than iodide. 24.