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Excited-state solvation dynamics of meso-tetrakis(4-sulfonatophenyl) porphyrin in solid imidazolium-sulfonate-based ionic liquids
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作者 Yunfang Zhao guangyu gao +1 位作者 Shufeng Wang Weijun Jin 《Chinese Science Bulletin》 SCIE EI CAS 2014年第5期492-496,共5页
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-... 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. 展开更多
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