论文部分内容阅读
The steady-state absorption and fluorescence emission positions of diprotonated meso-tetrakis(4-sulfonatophenyl)porphyrin(H4TPPS2-)are dependent on the polarity of the selected two solid ionic liquids(ILs)and are red-shifted with the increase of cation size.The solvation dynamics process of H4TPPS2-in these ILs occurs on two well-separated time scales.The short components with121.2–128.6 ps arise from the local motion of the ion-pairs in close proximity to the porphine core,and the long components with 1056.6–1261.8 ps are due to the collective translation motions of the ion-pairs.The dynamic Stokes shifts and the relaxation times increase with the increasing cation size of the ILs.
The steady-state absorption and fluorescence emission positions of diprotonated meso-tetrakis (4-sulfonatophenyl) porphyrin (H4TPPS2-) are dependent on the polarity of the selected two solid ionic liquids (ILs) and are red-shifted with the increase of cation size The solvation dynamics process of H4TPPS2-in these ILs occurs on two well-separated time scales. The short components with 121.2-128.6 ps arise from the local motion of the ion-pairs in close proximity to the porphine core, and the long components with 1056.6-1261.8 ps are due to the collective translation motions of the ion-pairs. the dynamic Stokes shifts and the relaxation times increase with the increasing cation size of the ILs.