Evaluating the contributions to conductivity in room temperature ionic liquids

被引：3
作者：
Simonis, Emily D. [1 ]
Blanchard, G. J. [1 ]
机构：
[1] Michigan State Univ, Dept Chem, 578 S Shaw Lane, E Lansing, MI 48824 USA
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2024年 / 26卷 / 24期
关键词：
ALKYL CHAIN-LENGTH; FLUORESCENCE DEPOLARIZATION; ELECTRICAL-CONDUCTIVITY; DIFFUSION-COEFFICIENTS; 2D IR; DYNAMICS; NMR; 1-BUTYL-3-METHYLIMIDAZOLIUM; RELAXATION; MOTION;
D O I：
10.1039/d4cp01218f
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 conductivity of room temperature ionic liquids is not described adequately by the Nernst-Einstein equation, which accounts only for Brownian motion of the ions. We report on the conductivity of the ionic liquid 1-butyl-3-methylimidazolum bis(trifluoromethylsulfonyl) imide (BMIM TFSI), comparing the known conductivity of this RTIL to the diffusion constants of the cationic and anionic species over a range of length scales, using time-resolved fluorescence depolarization and fluorescence recovery after photobleaching (FRAP) measurements of chromophores in the RTIL. Our data demonstrate that the diffusional contribution to molar conductivity is ca. 50%. Another mechanism for the transmission of charged species in RTILs is responsible for the "excess" molar conductivity, and we consider possible contributions. The conductivity of room temperature ionic liquids is not described adequately by the Nernst-Einstein equation, which accounts only for Brownian motion of the ions.
引用
收藏
页码：17048 / 17056
页数：9
相关论文
共 50 条
[41]   Mesoscopic structural organization in fluorinated pyrrolidinium-based room temperature ionic liquids [J].
Lo Celso, F. ;
Appetecchi, G. B. ;
Simonetti, E. ;
Keiderling, U. ;
Gontrani, L. ;
Triolo, A. ;
Russina, O. .
JOURNAL OF MOLECULAR LIQUIDS, 2019, 289
[42]   Current Rectification for Transport of Room-Temperature Ionic Liquids through Conical Nanopores [J].
Jiang, Xikai ;
Liu, Ying ;
Qiao, Rui .
JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (08) :4629-4637
[43]   What Determines the Glass Temperature and dc-Conductivity in Imidazolium-Polymerized Ionic Liquids with a Polythiophene Backbone? [J].
Pipertzis, Achilleas ;
Papamokos, George ;
Muehlinghaus, Markus ;
Mezger, Markus ;
Scherf, Ullrich ;
Floudas, George .
MACROMOLECULES, 2020, 53 (09) :3535-3550
[44]   Measuring the solubility of benzoic acid in room temperature ionic liquids using chronoamperometric techniques [J].
He, Weisi ;
Silvester, Debbie S. ;
Streeter, Ian ;
Aldous, Leigh ;
Hardacre, Christopher ;
Compton, Richard G. .
JOURNAL OF PHYSICAL ORGANIC CHEMISTRY, 2009, 22 (01) :69-76
[45]   Microscopic dynamics in room-temperature ionic liquids confined in materials for supercapacitor applications [J].
Osti, Naresh C. ;
Mamontov, Eugene .
SUSTAINABLE ENERGY & FUELS, 2020, 4 (04) :1554-1576
[46]   Voltammetry in Room Temperature Ionic Liquids: Comparisons and Contrasts with Conventional Electrochemical Solvents. [J].
Barrosse-Antle, L. E. ;
Bond, A. M. ;
Compton, R. G. ;
O'Mahony, A. M. ;
Rogers, E. I. ;
Silvester, D. S. .
CHEMISTRY-AN ASIAN JOURNAL, 2010, 5 (02) :202-230
[47]   Solvation of a Small Metal-Binding Peptide in Room-Temperature Ionic Liquids [J].
Shim, Youngseon ;
Kim, Hyung J. ;
Jung, YounJoon .
BULLETIN OF THE KOREAN CHEMICAL SOCIETY, 2012, 33 (11) :3601-3606
[48]   Spectroscopic and Electrochemical Investigation of Uranium and Neptunium in Chloride Room-Temperature Ionic Liquids [J].
Unger, Aaron J. ;
Jensen, Mark P. .
INORGANIC CHEMISTRY, 2023, 62 (13) :5186-5199
[49]   Evidence of a Fundamental Mechanism Governing Conductivity Relaxation in Room-Temperature Ionic Liquid [J].
Musial, M. ;
Wojnarowska, Z. ;
Cheng, S. ;
Ngai, K. L. ;
Paluch, M. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2019, 123 (36) :22089-22094
[50]   Structure and dynamics of room temperature ionic liquids with bromide anion: results from 81Br NMR spectroscopy [J].
Endo, Takatsugu ;
Imanari, Mamoru ;
Hidaka, Yuki ;
Seki, Hiroko ;
Nishikawa, Keiko ;
Sen, Sabyasachi .
MAGNETIC RESONANCE IN CHEMISTRY, 2015, 53 (05) :369-378
12345