γ-radiation effect on ionic liquid [bmim][BF4]

被引：67
作者：
Qi, Mingying [1 ,2 ]
Wu, Guozhong [1 ]
Li, Qianmei [3 ]
Luo, Yingshe [3 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
[3] Cent S Univ Forestry & Technol, Changsha 410004, Hunan, Peoples R China
来源：
RADIATION PHYSICS AND CHEMISTRY | 2008年 / 77卷 / 07期
基金：
中国国家自然科学基金;
关键词：
ionic liquid; radiation; rheological properties;
D O I：
10.1016/j.radphyschem.2007.12.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of gamma radiation on 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) was investigated in detail. It was found that radiation induced an increase of UV absorption of the ionic liquid but no change in its glass transition point. Raman spectroscopy analysis indicates that the radiolysis of [bmim][BF4] induces detectable destruction of alkyl-chain and scission of H-atoms of ring of imidizolium cation, and the relatively small changes of BF4 anion. Viscosities of irradiated [bmim][BF4] samples were measured at different shear rates and temperatures, and compared with irradiated [bmim][PF6] samples. The plots of shear stress against shear rate indicates that [bmim][BF4] is a Newtonian fluid, no matter with irradiation. The viscosity of irradiated [bmim][BF4] decreased with increasing of temperature and followed an Arrhenius equation. However, radiation caused no change in the viscosity of [bmim][BF4], but a decrease in the viscosity of [bmim][PF6] by up to 10%. We conclude that the radiation stability of [bmim][BF4] is higher than [bmim][PF6]. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：877 / 883
页数：7
相关论文
共 26 条
[1]   An investigation of the radiochemical stability of ionic liquids [J].
Allen, D ;
Baston, G ;
Bradley, AE ;
Gorman, T ;
Haile, A ;
Hamblett, I ;
Hatter, JE ;
Healey, MJF ;
Hodgson, B ;
Lewin, R ;
Lovell, KV ;
Newton, B ;
Pitner, WR ;
Rooney, DW ;
Sanders, D ;
Seddon, KR ;
Sims, HE ;
Thied, RC .
GREEN CHEMISTRY, 2002, 4 (02) :152-158
[2]  
[Anonymous], DALTON T
[3]   The cybotactic region surrounding fluorescent probes dissolved in 1-butyl-3-methylimidazolium hexafluorophosphate: Effects of temperature and added carbon dioxide [J].
Baker, SN ;
Baker, GA ;
Kane, MA ;
Bright, FV .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (39) :9663-9668
[4]   Reaction kinetics in ionic liquids: Pulse radiolysis studies of 1-butyl-3-methylimidazolium salts [J].
Behar, D ;
Gonzalez, C ;
Neta, P .
JOURNAL OF PHYSICAL CHEMISTRY A, 2001, 105 (32) :7607-7614
[5]  
Berthon L, 2006, DALTON T, P2526, DOI 10.1039/b601111j
[6]   Structural characterization of a lanthanum bistriflimide complex, La(N(SO2CF3)2)3(H2O)3, and an investigation of La, Sm, and Eu electrochemistry in a room-temperature ionic liquid, [Me3NnBu][N(SO2CF3)2] [J].
Bhatt, AI ;
May, I ;
Volkovich, VA ;
Collison, D ;
Helliwell, M ;
Polovov, IB ;
Lewin, RG .
INORGANIC CHEMISTRY, 2005, 44 (14) :4934-4940
[7]   Precipitation of a dioxouranium(VI) species from a room temperature ionic liquid medium [J].
Bradley, AE ;
Hatter, JE ;
Nieuwenhuyzen, M ;
Pitner, WR ;
Seddon, KR ;
Thied, RC .
INORGANIC CHEMISTRY, 2002, 41 (07) :1692-1694
[8]  
Branco LC, 2002, CHEM-EUR J, V8, P3671, DOI 10.1002/1521-3765(20020816)8:16<3671::AID-CHEM3671>3.0.CO
[9]  
2-9
[10]   Extraction of fission palladium by Aliquat 336 and electrochemical studies on direct recovery from ionic liquid phase [J].
Giridhar, P ;
Venkatesan, KA ;
Srinivasan, TG ;
Rao, PRV .
HYDROMETALLURGY, 2006, 81 (01) :30-39
123