STUDIES ON EXCITATION-ENERGY TRANSFER OF COMPLETELY SYNTHESIZED BILAYER-MEMBRANE CONTAINING BIPHENYL MOIETY

Intermolecular excitation energy transfer has been investigated in the binary mixture system mediated by completely synthesized bilayer memb rane containing biphenyl moiety(DBBTAB). The donor, a biphenyl group, was embeded in the interior of the bilayer membrane, The acceptor, flu orescein sodium salt, two negatively charged polar groups, was attract ed electrostatically to the positively charged surface of the DBBTAB v esicles. The efficiency of the energy transfer was found to be good. F luorescein quenched the fluorescence intensity of the biphenyl, which fitted a Stern-Volmer relationship over the concentration ranges of 0 similar to 8X10(-5) mol/L. The functionallization of the vesicles in t he energy transfer was explored, and energy transfer mechanism was dis cussed too, Furthermore, energy transfer from the fluorescein donor to tetraphenylporphyrin sulfated sodium acceptor, was also observed in t he same system. The energy transfer improved light efficiency and exte nded the spectral region. The experiment results imply that the DBBTAB vesicle is better media for energy transfer in dye laser and good mem brane mimic agent.