Identification of the Decay Pathway of Photoexcited Nucleobases  

作　　者：Xiangxu Mu Ming Zhang Jiechao Feng Hanwei Yang Nikita Medvedev Xinyang Liu Leyi Yang Zhenxiang Wu Haitan Xu Zheng Li 

机构地区：[1]State Key Laboratory for Mesoscopic Physics and Collaborative Innovation Center of Quantum Matter.School of Physics,Peking University,Beijing 100871,China [2]institute of Physics Czech Academy of Science,Na Slovance 2,18221 Prague 8,Czech Republic [3]School of Materials Science and Intelligent Engineering,Nanjing University,Suzhou 215163,China [4]Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,China [5]School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China [6]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan,Shanxi 030006 China [7]Peking University Yangtze Delta Institute of Optoelectronics,Nantong,Jiangsu 226010,China

出　　处：《Ultrafast Science》2023年第2期31-38,共8页超快科学（英文）

基　　金：supported by the National Natural Science Foundation of China[grant numbers 12174009,11974031,12104082,12234002,and 92250303];Beijing Natural Science Foundation[grant number Z220008];N.M.gratefully acknowledges financial support from the Czech Ministry of Education,Youth,and Sports[grantnumbers LTT17015,LM2018114,and EF16_013/0001552].

摘　　要：The identification of the decay pathway of the nucleobase uracil after being photoexcited by ultraviolet light has been a long-standing problem.Various theoretical models have been proposed but yet to be verified.Here,we propose an experimental scheme to test the theoretical models of gas phase uracil decay mechanism by a combination of ultrafast x-ray spectroscopy,x-ray diffraction,and electron diffraction methods.Incorporating the signatures of multiple probing methods,we demonstrate an approach that can identify the dominant mechanism of the geometric and electronic relaxation of the photoexcited uracil molecule among several candidate models.

关 键 词：methods EXCITED URACIL 

分 类 号：O62[理学—有机化学]