5,10—二(对—氨基)四苯基卟啉和吖啶黄之间激发能量的传递

ENERGY TRANSFER FROM ACRIFLAVINE TO 5,10-BIS(P-AMINOPHENYL)-15,20- BISPHENYLPORPHIN IN CHLOROFORM SOLUTION

利用Forster能量传递机制,研究了氯仿溶液中吖啶黄向5、10—二(对—氨基)四苯基卟啉(简称TBP)的激发能量传递和TBP.浓度变化时对能量传递速度常数的影响.实验结果表明,吖啶黄和TBP之间具备能量共振传递的条件,并且计算了能量共振传递的临界距离为0.42nm、传递效率为0.72和传递速度常数为1.42×10~7s^(-1).这些数据对复合膜光电转换器件的设计将具有重要意义.

According to Forster's energy transfer mechanism the energy transfer from acriflavine to 5,10-b.is (P-aminenyl)-l5-20-bispheny]porphin (TBP) and sensitive luminescence of TBP in chloroform solution have been studied by luminescence spectroscopy. The results show that the energy transfer from acriflavine to TBP can be explained simply in terms of Forster's energy transfer mechanism.In the present system we have found that R value of critical trans- fer distance for the donor (acriflavine)-acceptor (TBP) system equals to 0.42nm and the energy transfer effeciency is about 0.72. When the concentration of acceptor increased the lifetime of the donor decreased and the transfer rate increased.The transfer rate given in Table 1 have been calculated from the lifetimes obtained by fitting the date with single exponential decay. From Table i it is clear that the transfer rate is increased from 1.07XXXXXXXX107S-1 to 1.42XXXXXXX10S-1.Therefore ,it is concluded that in the present system energy transfer| from donor to acceptor at this concentration is governed by Footer's energy transfer theory.