摘要
利用飞秒时间分辨光谱技术研究了PSⅡ中捕光天线LHCⅡ内Chla分子和 β Car分子传递光能到反应中心的时间特性 ,实验测得Chla分子用了 2 5 ps ,β Car分子用了 2 5 0 ps 理论研究得出 :2 5 ps是相邻Chl分子之间随机转移传能的时间常数 ,2 5 0 ps是LHCⅡ内相邻 β Car分子 ,通过Chla分子单步F rster共振传递、Dexter电子交换机制、激子转移把能量转移到反应中心的总时间 理论计算与实验结果基本符合 。
Femtosecond time resolved spectrum techniques have been used to study the time characteristic of energy transfer from Chla and β Car molecule of the LHCⅡ to the reaction center in the photosystem Ⅱ.By experiment Chla molecule uses 25 ps, β Car molecules use 250 ps. Theory investigations has shown that 25 ps is a energy transfer time on random transfer between neighboring Chla molecules,250 ps is a energy transfer time on a one step Frster transfer, Dexter electron exchange, exciton transfer between neighboring β Car and Chla molecules from the excited β Car in the LHCⅡ to the reaction center. Theory counts are in agreement with the experiment results basically.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2003年第6期641-645,共5页
Acta Photonica Sinica
基金
国家重点基础研究发展规划(G19980 10 10 0 )资助项目
