Abstract：Laser flash photolysis study was carried out for the first time in the binary mixture of room-temperature ionic liquid (RTIL) and traditional organic solvent. Photochemical properties of the ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF6] and its binary mixed solutions with MeCN were investigated by laser photolysis technique at an excitation wavelength of 355 nm, using anthraquinone (AQ) as a probe molecule. It was indicated that [bmim][PF6] itself participates in the reaction with 3AQ*. Moreover, along with the change in the ratio of RTIL to organic solvent, the decay reaction rate constant of 3AQ*changes regularly and a critical point was observed at xRTIL=0.06. Before the critical point, the decay rate constant increases rapidly with increasing xRTIL; however, it decreases obviously with increasing xRTIL after the critical point. The kinetic data are given, and the possible reaction mechanisms in mixed solutions are also speculated.
徐静静,吴国忠,龙德武,姚思德. 离子液体[bmim][PF6]与乙腈混合体系中的激光光解研究[J]. 光谱学与光谱分析, 2007, 27(10): 1936-1938.
XU Jing-jing, WU Guo-zhong, LONG De-wu, YAO Si-de. Laser Photolysis Study on Photochemical Reactions in Mixed Solutions of [bmim][PF6] and Acetonitrile. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(10): 1936-1938.
[1] LI Ru-xiong(李汝雄主编). Green Solvent——The Synthesis and Application of Room Temperature Ionic Liquids(绿色溶剂——离子液体的合成与应用). Beijing：Chemical Industry Press(北京: 化学工业出版社)，2004. [2] Gutowski K E, Broker G A. J. Am. Chem. Soc., 2003, 125: 6632. [3] Dupont J, de Souza R F, Suarez P A Z. Chem. Rev., 2002, 102: 3667. [4] Wu G, Liu Y, Long D. Macromol. Rapid. Commun., 2005, 26: 57. [5] Wasserscheid P, Keim W. Angew. Chem. Int. Ed., 2000, 39: 3772. [6] Talaty E R, Raja S, Storhaug V J, et al. J. Phys. Chem., B, 2004, 108: 13177. [7] Paul A, Mandal P, Samanta A. Chem. Phys. Lett., 2005, 402: 375. [8] Alvaro M, Garc1a H. Chem. Phys. Lett., 2002, 362: 435. [9] Behar D, Gonzalez C, Neta P. J. Phys. Chem. A, 2001, 105: 7607. [10] Karmakar R, Samanta A. Chem. Phys. Lett., 2003, 376: 638. [11] LIU Shi-heng, WANG Shi-long, SUN Xiao-yu, et al(刘士，汪世龙，孙晓宇, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2005，25(5)：776. [12] WANG Shi-long，ZHU Da-zhang，SUN Xiao-yu，et al(汪世龙，朱大章，孙晓宇, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析)，2006，26(8)：1479. [13] Hulme B E, Land E J, et al. J. Chem. Soc., Faraday Trans., 1972, 68: 2003. [14] Marsh K N, Boxall J A, et al. Fluid Phase Eqilibria, 2004, 219: 93.
