Laser photolysis of ionic liquid [bmim][PF6]

RADIOCHEMISTRY, RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE

Laser photolysis of ionic liquid [bmim][PF₆]

ZHU Guanglai，

WU Guozhong，

LONG Dewu，

SHA Maolin，

YAO Side

Nuclear Science and Techniques

Vol.18, No.1

pp.16-19

Published in print 20 Jan 2007

DOI：10.1016/S1001-8042(07)60011-6

CLC：O644.1,O433.4

37400

Photoinduced chemical reactions of 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF₆]) were studied by laser photolysis at a wavelength of 266 nm. Excited triplet state ³[bmim]^+* was observed, radical cation [bmim] ²⁺^· and neutral [bmim]^· radical via photoionization were also formed. Energy transfer from ³[bmim]^+* to β-carotene was confirmed. Oxidation via one electron transfer from TMPD to ³[bmim]^+* was also observed and the rate constant was determined to be 1.2 × 10⁵ L·mol^-1·s^-1. The reaction of [bmim][PF₆] with hydrated electron (e_aq^-) was confirmed by laser photolysis in aqueous solution.

[bmim][PF6]Laser flash photolysisTriplet statePhotoionization

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