Journal of Radiation Research and Radiation Proces ›› 2015, Vol. 33 ›› Issue (1): 10302-010302.doi: 10.11889/j.1000-3436.2015.rrj.33.010302

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Laser flash photolysis studies on difloxacin in acetonitrile solution

LI Haixia1,2  LIU Yancheng1,2  TANG Ruizhi1,2  ZHANG Peng1,2  XU Yulie1,2  WANG Wenfeng1   

  1. 1(Shanghai Institute of Applied Physics, Chinese Academy of Sciences Jiading Campus, Shanghai 201800, China) 
    2(Graduate University of Chinese Academy of Science, Beijing 100049, China)
  • Received:2014-09-17 Revised:2014-12-05 Online:2015-02-20 Published:2015-01-20

Abstract:

The photochemistry of difloxacin in acetonitrile was investigated using laser flash photolysis. Energy transfer method was also used to estimate the properties of the triplet state of difloxacin. The results showed that excitation of the solution containing difloxacin and naproxen upon 355 nm laser flash produced the triplet of difloxacin at 580 nm firstly. Subsequently, the excitation energy of triplet difloxacin was transferred to naproxen generating triplet naproxen. Characteristic absorption of the triplet state of naproxen at 440 nm was recorded. By means of transfer of excitation energy, the molar absorption coefficients of triplet difloxacin were determined to be 8,900 dm3/mol?cm at 580 nm. Through changing the concentration of difloxacin, the self-decay rate constant and triplet lifetime for difloxacin in acetonitrile solution were observed to be 5.39 × 106 s−1 and 2.8 μs.

Key words: Laser flash photolysis, Triplet state, Difloxacin, Naproxen

CLC Number: 

  • TL13