Institute of Atomic and Molecular Physics, Jilin University, Changchun, China.
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
Luminescence. 2021 Aug;36(5):1300-1305. doi: 10.1002/bio.4056. Epub 2021 May 13.
Fluorescence quenching of rhodamine 6G by graphene oxide (GO) was investigated using steady-state fluorescence spectroscopy and ultrafast time-resolved absorption spectroscopy. The steady-state fluorescence spectra showed that rhodamine 6G fluorescence was effectively quenched by titrating the GO to the rhodamine 6G solutions. For lower GO concentrations, transient dynamic curves followed two-exponential decay parameters. For higher GO concentrations, the dynamic curves could not be fitted well, and three-exponential decay parameters were appropriate. The results indicated that there was a new transition process (electron transfer) in the exited rhodamine 6G and GO solution.
利用稳态荧光光谱和超快时间分辨吸收光谱研究了氧化石墨烯（GO）对若丹明 6G 的荧光猝灭作用。稳态荧光光谱表明，通过向若丹明 6G 溶液中滴定 GO，可有效猝灭若丹明 6G 的荧光。对于较低的 GO 浓度，瞬态动力学曲线遵循双指数衰减参数。对于较高的 GO 浓度，动力学曲线拟合效果不佳，三指数衰减参数较为合适。结果表明，在激发态的若丹明 6G 和 GO 溶液中存在一个新的跃迁过程（电子转移）。
