Abstract
Incorporation of the syn head-to-head cyclobutane dimer (2) of sodium ethyl 5- [2- (4-hexadecyloxyphenyl) ethenyl] -2-pyrazinylmethylphosphonate (1) in the bilayer of DPPC vesicles was noted to suppress the release of glucose entrapped in the vesicles. The release of entrapped glucose from the vesicle was accelerated by irradiation at 254nm, and also completely suppressed by irradiation at above 300nm. This acceleration-suppression cycle of the release by light was successively repeated three times. This on-and-off release control of vesicles considered due to photochromism involving monomer 1 and its dimer 2 intermolecularly and intramolecularly is reported here for the first time.
