Citation: MA Ren-Jun, GUO Qian-Jin, LI Bo-Xuan, XIA An-Dong. Triplet Excited State Dynamics of Porphyrin in Ionic Liquid [Bmim][BF₄][J]. Acta Physico-Chimica Sinica, ;2017, 33(11): 2191-2198. doi: 10.3866/PKU.WHXB201705242 shu

Triplet Excited State Dynamics of Porphyrin in Ionic Liquid [Bmim][BF₄]

MA Ren-Jun ^1,2, ,
GUO Qian-Jin ^1,2 ,
LI Bo-Xuan ^1,2 ,
XIA An-Dong ^1,2

1.
Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
2.
University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 4 May 2017
Revised Date: 17 May 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21333012, 21673252, 21373232).

Room temperature ionic liquids (RTILs) have been extensively studied with various applications owing to their non-volatility, excellent stability, good electrochemical properties and they can be easily manipulated by designing an appropriate structure and property. They differ from conventional solvents in that they have structural heterogeneity, which is one of the most essential natures of RTILs. In this work, the triplet excited state dynamics of meso-tetraphenylporphyrin (TPP) in the ionic liquid [Bmim][BF₄] were studied, and it was observed that the triplet state lifetime of TPP increases remarkably from 2.95 to 184 μs upon laser irradiation. These results of the dynamics of TPP triplet excited state are probably caused by the laser-induced microstructure changes of the ionic liquid, and the redistribution of oxygen molecules polarized by the external laser field and/or the ions in the heterogeneous microenvironment of the ionic liquid upon laser irradiation.
- Ionic liquid,
- Structural heterogeneity,
- Molecular probe,
- Triplet state dynamics,
- Porphyrin
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Triplet Excited State Dynamics of Porphyrin in Ionic Liquid [Bmim][BF4]

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Triplet Excited State Dynamics of Porphyrin in Ionic Liquid [Bmim][BF₄]