Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (3): 419-424.doi: 10.3866/PKU.WHXB201501222

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles     Next Articles

Photochemical Reaction Kinetics of Duroquinone in a Mixture of Ionic Liquid [BPy][BF4] and Acetonitrile

ZHU Guang-Lai1, WANG Yu1, ZHANG Liang-Wei1, LIU Yan-Cheng2, WU Guo-Zhong2   

  1. 1. Institute of Atomic and Molecular Physics, Anhui Normal University, Wuhu 241000, Anhui Province, P. R. China;
    2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, P. R. China
  • Received:2014-11-19 Revised:2015-01-22 Published:2015-03-06
  • Contact: ZHU Guang-Lai, WU Guo-Zhong E-mail:zhglai@mail.ahnu.edu.cn;wuguozhong@sinap.ac.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21173002) and Natural Science Foundation of Anhui Province, China (1308085MB20).

Abstract:

Photochemical reactions of duroquinone (DQ) in solutions consisting of mixtures of the ionic liquid N-butylpyridinium tetrafluoroborate ([BPy][BF4]) and acetonitrile (MeCN) were studied using the 355 nm laser flash photolysis technique. Increasing the ratio of [BPy][BF4] had no obvious impact on the absorption peak of the triplet excited state of DQ (3DQ*), which followed monoexponential kinetics in the N2-saturated solution. However, increasing the ratio of [BPy] [BF4] did affect the photoinduced electron transfer process from triethylamine to 3DQ* in the mixture by decreasing the reaction rate and the quantum yield of the transient radical. The results highlight the ability to tune the efficiency and the rate of the photoinduced electron transfer by changing the proportion of [BPy][BF4] in the mixture.

Key words: N-butylpyridinium tetrafluoroborate, Ionic liquid, Duroquinone, Transient absorption spectroscopy, Photoinduced electron transfer

MSC2000: 

  • O644