To demonstrate reversible property switching, multiple cycles of irradiation were carried out at three concentrations (4mM, 32 mM and 56 mM) for II (Fig. ) and III (Fig. ). In both cases the variation in viscosity was negligible at 4mM, more significant at 32 mM and most significant at 56 mM). It was possible to switch the viscosities of II from approximately 7.25