合成双分子膜多元体系的激发态能量转移

Excitation Energy Transfer of Multiple Systems Mediated by Synthetic Bilayer Membrane Containing Biphenyl Moiety

发现在４－（４－癸氧基联苯－４－氧基三甲基）溴化铵双分子膜体系内，从联苯给体通过结合在膜表面上的达旦黄传递到罗丹明Ｂ受体的三元激发态的能量转移效率较高．探讨了囊泡在此能量转移过程中的特殊功能作用和能量转移的机制．同时还观察到了在此体系内通过静电相互作用，组织在囊泡表面上的达旦黄、荧光黄、罗丹明Ｂ和四苯基卟啉间的多元能量转移，这种能量转移可改善光的输出，扩展光波的覆盖范围．

Ternary excitation energy transfer from biphenyl donor embeded in the interior of bilayer membranes cascading through membranebound titan yellow to membranebound rhodamine B was investigated in the mixture system of DBBTAB(4(4decyloxybiphenyl4oxytrimethyl)ammonium bromide) vesicles. The energy transfer efficiency of the ternary system was good. The specific function of the DBBTAB vesicles in energy transfer was explored and the mechanism of energy transfer was discussed. Furthermore, the cascading energy transfer among biphenyl, titan yellow, fluorescein, rhodamine B and tetraphenyl porphin, which anchored on the surface of the DBBTAB membrane except biphenyl, was also observed in the same mixture system. It improved the light efficiency and extended the spectral region. The experiment results imply that DBBTAB vesicle is a promising efficient medium for energy transfer in dye lasers and a better membrane mimetic agent.