Excited State Properties of Fucoxanthin Aggregates  

作　　者：ZUO Jialing TAN Liming XU Yi MA Yingchao DONG Jia WANG Peng ZHANG Jianping 

机构地区：[1]Department of Chemistry, Renmin University of China, Beijing 100872, P. R. China

出　　处：《Chemical Research in Chinese Universities》2019年第4期627-635,共9页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos.21273282,21673289,21673288,21173265);the International Cooperation Project Between China and Russia(NSFC-RFBR)(No.21411130185).

摘　　要：The structure and excited state properties of the H- and J-aggregates of the marine carbonyl carotenoid, fucoxanthin(Fx), were studied by various spectroscopic methods, and compared with those of Fx monomers in polar organic solvents. The fluorescent analysis indicated tliat the higher vibronic states of S2 contribute more to populating the S1 state, from which fluorescent emission mainly originates. Resonance Raman and density functional theory calculations confirmed the ‘card-packed' and chead-to-taiF structures of the H- and J-aggregates of Fx, respectively. An fs time-resolved absorption study proved the coexistence of Si and intramolecular charge transfer relaxation pathways upon excitation to the S2 state for both tlie monomers and aggregates.

关 键 词：FUCOXANTHIN AGGREGATE Resonance Raman fs TIME-RESOLVED absorption Excited state property SINGLET FISSION 

分 类 号：O6[理学—化学]