Effects of functional group substitution on electron spectra and solvation dynamics in a family of ionic liquids

被引:78
作者
Wishart, JF [1 ]
Lall-Ramnarine, SI
Raju, R
Scumpia, A
Bellevue, S
Ragbir, R
Engel, R
机构
[1] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA
[2] CUNY Queens Coll, Grad Sch, Dept Chem & Biochem, Flushing, NY 11367 USA
关键词
electron solvation; ionic liquid; alcohol;
D O I
10.1016/j.radphyschem.2004.09.005
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
Ionic liquids containing ether-, alcohol- and alkyl-ftinctionalized quaternary ammonium dications were studied by pulse radiolysis. Spectra on nanosecond timescales revealed that solvation of the excess electron is particularly slow In the case of the alcohol-derivatized ionic liquids. The blue shift of the electron spectrum to the customary 650 nm peak takes 25-40ns at 21 degreesC. Comparison with the relaxation dynamics observed in viscous 1,2,6-trihydroxyhexane reveals the hindering effect of the ionic liquid lattice on hydroxypropyl side chain reorientation. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:99 / 104
页数:6
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