Direct Observation of Singletππ*and nπ*Equilibrium State in 2-Amino-1,3,5-triazine Solution  

2-氨基-1,3,5-三嗪分子中ππ~*和nπ~*单重激发平衡态的直接观测(英文)

作　　者：Xiuhua Li Xueli Wang Meng Lv Zhongneng Zhou Haifeng Pan Jinquan Chen 李秀华;王雪力;吕萌;周中能;潘海峰;陈缙泉(华东师范大学精密光谱科学与技术国家重点实验室,上海200241;山西大学极端光学协同创新中心,太原030006)

机构地区：[1]State Key Laboratory of Precision Spectroscopy,East China Normal University,Shanghai 200241,China [2].Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Chinese Journal of Chemical Physics》2022年第5期747-753,I0004-I0010,I0011,共15页化学物理学报（英文）

基　　金：supported by Shanghai Rising-Star Program(No.19QA1402800)。

摘　　要：1,3,5-Triazine molecules represent a class of molecules that may have been prebiotic information carriers in a primordial soup in early Earth and their excited state dynamics has received attention in recent years.In our previous study,one component with lifetime longer than100 ps was discovered in 2-amino-1,3,5-trainzine(2-AT),but its nature has not been revealed.In this study,excited state dynamics of 2-AT is studied in different solvents by using femtosecond time-resolved transient absorption and fluorescence upconversion spectroscopy.Interestingly,an equilibrium state consisting of the brightππ^(*)and dark nπ^(*)states in 2-AT is directly observed in aqueous solution and its dynamics is solvent sensitive.The whole picture of the excited state deactivation mechanism of 2-AT is proposed based on our spectroscopy results.

关 键 词：Ultrafast spectroscopy Equilibrium state Solvent sensitive kinetics 1 3 5-Triazine 

分 类 号：O626[理学—有机化学]