Readily continuously, and reversibly tunable helical preference of optically active poly(phenylacetylenes)

Readily tunable systems driving the main chains of poly(phenylacetylene) (PPA) derivatives into helical conformation with desirable amount of one sense in excess were developed. With the contribution of the PPA main chain twisting, induced Cotton magnitudes were tuned by changing solvent, basicity and concentration of glycine. These agents act as tuning interferences for stabilizing or destabilizing the preferred helical structures.