Ionic conductivity, infrared and Raman spectroscopic studies of 1-methyl-3-propylimidazolium iodide ionic liquid with added iodine

被引:102
作者
Jerman, I. [1 ]
Jovanovski, V. [1 ]
Vuk, A. Surca [1 ]
Hocevar, S. B. [1 ]
Gaberscek, M. [1 ]
Jesih, A. [2 ]
Orel, B. [1 ]
机构
[1] Natl Inst Chem, Ljubljana 1000, Slovenia
[2] Jozef Stefan Inst, Ljubljana 1000, Slovenia
关键词
ionic liquid; triiodide; pentaiodide; conductivity; IR spectroscopy; in situ Raman spectroclectrochemistry;
D O I
10.1016/j.electacta.2007.09.043
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Polyiodides (1(x)(-). x=3 and 5) and 2I(-)...I-2 adducts were established from the Raman spectra study of 1-methyl-3-propylimidazolium iodide (MPIm(+)I(x)(-) ; 1 <= x <= 5) ionic liquids containing various amounts of iodine (0mol <= I-2 <= 2 mol). The existence of I-3(-) and 2I(-)...I-2 was established for 1 <= x <= 2.5, symmetric I-3(-) ions for x=3, while linear and discrete I-5(-) was substantiated for 3 <= x <= 5. The presence of polyiodide species ill MPIm(+)I(x)(-) (1 <= x <= 5) was correlated with all enhanced ionic conductivity, attributed to the established relay-type Grotthus mechanism. Two-step conductivity increase was also reflected in decrease of the hydrogen bond interactions between the C-H ring groups and polyiodides. While in the concentration range 1 <= x <= 3 (triiodides and tetraiodides) IR bands changed only slightly in intensity, in the concentration range x > 3 the C-H stretching bands (3040-3170 cm(-1)) split and the new band at 1585 cm(-1) appeared in the IR spectra beside the already existing Im(+) ring stretching mode at 1566 cm(-1). (c) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2281 / 2288
页数:8
相关论文
共 46 条
[11]   Resonance Raman scattering of a dye-sensitized solar cell: Mechanism of thiocyanato ligand exchange [J].
Greijer, H ;
Lindgren, J ;
Hagfeldt, A .
JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (27) :6314-6320
[12]   Electrochemical and in-situ Raman spectroelectrochemical study of 1-methyl-3-propylimidazolium iodide ionic liquid with added iodine [J].
Jovanovski, V. ;
Orel, B. ;
Jerman, I. ;
Hocevar, S. B. ;
Ogorevc, B. .
ELECTROCHEMISTRY COMMUNICATIONS, 2007, 9 (08) :2062-2066
[13]   Novel polysilsesquioxane-I-/I3- ionic electrolyte for dye-sensitized photoelectrochemical cells [J].
Jovanovski, V ;
Orel, B ;
Jese, R ;
Vuk, AS ;
Mali, G ;
Hocevar, SB ;
Grdadolnik, J ;
Stathatos, E ;
Lianos, P .
JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (30) :14387-14395
[14]   Dye-sensitized solar cells with electrolyte based on a trimethoxysilane-derivatized ionic liquid [J].
Jovanovski, Vasko ;
Stathatos, Elias ;
Orel, Boris ;
Lianos, Panagiotis .
THIN SOLID FILMS, 2006, 511 :634-637
[15]   Molecular structure, vibrational spectra, and hydrogen bonding of the ionic liquid 1-ethyl-3methyl-1H-imidazolium tetrafluoroborate [J].
Katsyuba, SA ;
Dyson, PJ ;
Vandyukova, EE ;
Chernova, AV ;
Vidis, A .
HELVETICA CHIMICA ACTA, 2004, 87 (10) :2556-2565
[16]   High performance dye-sensitized solar cells using ionic liquids as their electrolytes [J].
Kawano, R ;
Matsui, H ;
Matsuyama, C ;
Sato, A ;
Susan, MABH ;
Tanabe, N ;
Watanabe, M .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2004, 164 (1-3) :87-92
[17]   Equilibrium potentials and charge transport of an I-/I3- redox couple in an ionic liquid [J].
Kawano, R ;
Watanabe, M .
CHEMICAL COMMUNICATIONS, 2003, (03) :330-331
[18]  
KLABOE P, 1967, J AM CHEM SOC, V89, P3667
[19]   Photocurrent-determining processes in quasi-solid-state dye-sensitized solar cells using ionic gel electrolytes [J].
Kubo, W ;
Kambe, S ;
Nakade, S ;
Kitamura, T ;
Hanabusa, K ;
Wada, Y ;
Yanagida, S .
JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (18) :4374-4381
[20]   Quasi-solid-state dye-sensitized solar cells using room temperature molten salts and a low molecular weight gelator [J].
Kubo, W ;
Kitamura, T ;
Hanabusa, K ;
Wada, Y ;
Yanagida, S .
CHEMICAL COMMUNICATIONS, 2002, (04) :374-375