中文摘要：

对比研究了岩藻黄质（Fuc）在氯仿和甲醇溶液中光诱导生成自由基正离子（Fuc·＋）的动力学过程,考察了2种不同溶剂中Fuc·＋产生机制的差异.采用光谱电化学方法结合纳秒时间分辨吸收光谱技术,通过比较直接光激发和三重态敏化2种不同方式诱导生成Fuc·＋的动力学过程发现,在氯仿溶液中Fuc·＋主要源于Fuc的单重激发态（S2）,在甲醇溶液中则主要源于Fuc的三重激发态（T1）.

英文摘要：

Kinetics of fucoxanthin radical cation（Fuc·＋） formation in chloroform and in methanol were comparatively studied by means of nanosecond time-resolved absorption spectroscopy combined with spetroelectrochemistry.Direct photoexcitation and anthracene-sensitized triplet excitation,respectively,were used to initiate the photochemistry of different fucoxanthin solutions.It is found that in chloroform Fuc·＋ is mainly formed from the singlet excited state of Fuc（S2）,whereas in methanol it is mainly formed from the lowest triplet excited state of Fuc（T1）.