Effect of water on the transport properties of protic and aprotic imidazolium ionic liquids – an analysis of self-diffusivity, conductivity, and proton exchange mechanism
Literature Information
N. Yaghini, L. Nordstierna, A. Martinelli
In this paper we report on the transport properties of protic and aprotic ionic liquids of the imidazolium cation (C2C1Im+ or C2HIm+) and the TFSI− or TfO− anion as a function of added water. We observe that the self-diffusion coefficient of the ionic species increases upon addition of water, and that the cation diffuses faster than the anion in the entire water concentration range investigated. We also observe that the overall increase of anionic and cationic diffusion coefficients is significant for C2HImTfO while it is rather weak for C2C1ImTFSI, the former being more hydrophilic. Moreover, the difference between cationic and anionic self-diffusivity specifically depends on the structure of the ionic liquid's ions. The degree of ion–ion association has been investigated by comparing the molar conductivity obtained by impedance measurements with the molar conductivity calculated from NMR data using the Nernst–Einstein equation. Our data indicate that the ions are partly dissociated (Λimp/ΛNMR in the range 0.45–0.75) but also that the degree of association decreases in the order C2HImTfO > C2HImTFSI ≈ C2C1ImTfO > C2C1ImTFSI. From these results, it seems that water finds different sites of interaction in the protic and aprotic ionic liquids, with a strong preference for hydrogen bonding to the –NH group (when available) and a stronger affinity to the TfO anion as compared to the TFSI. For the protic ionic liquids, the analysis of 1H NMR chemical shifts (upon addition of H2O and D2O, respectively) indicates a water–cation interaction of hydrogen bonding nature. In addition, we could probe proton exchange between the –NH group and deuterated water for the protic cation, which occurs at a significantly faster rate if associated with the TfO anion as compared to the TFSI.
Recommended Journals

Bioorganic & Medicinal Chemistry Letters

Critical Reviews in Solid State and Materials Sciences

NDT & E International

Journal of the Indian Institute of Science

Herald of the Russian Academy of Sciences

Medicinal Chemistry Research

Acta Metallurgica Sinica-English Letters

Journal of Chemical Sciences

Colloid Journal

Polycyclic Aromatic Compounds
Related Literature
On the influence of porphyrin π–π stacking on supramolecular chirality created in the porphyrin-based twisted tape structure
Masayuki Takeuchi, Satoshi Tanaka, Seiji Shinkai
DOI: 10.1039/B512128K
Insulated conducting polymers: manipulating charge transport using supramolecular complexes
Phoebe H. Kwan, Timothy M. Swager
DOI: 10.1039/B508399K
Non-catalytic and template-free growth of aligned CdS nanowires exhibiting high field emission current densities
Yi-Feng Lin, Yung-Jung Hsu, Shih-Yuan Lu, Sheng-Chin Kung
DOI: 10.1039/B604309G
The direct α-zincation of amides, phosphonates and phosphine oxides by H–Zn exchange
Mark L. Hlavinka, Jeffrey F. Greco, John R. Hagadorn
DOI: 10.1039/B509190J
A missing allene of heavy Group 14 elements: 2-germadisilaallene
Takeaki Iwamoto, Takashi Abe, Chizuko Kabuto, Mitsuo Kira
DOI: 10.1039/B509878E
Direction of unusual mixed-ligand metal–organic frameworks: a new type of 3-D polythreading involving 1-D and 2-D structural motifs and a 2-fold interpenetrating porous network
Miao Du, Xiu-Juan Jiang, Xiao-Jun Zhao
DOI: 10.1039/B509875K
Scanning electrochemical microscopy under illumination: an elegant tool to directly determine the mobility of charge carriers within dye-sensitized nanostructured semiconductors
Biljana Bozic, Egbert Figgemeier
DOI: 10.1039/B601587E
Characterization of the H2 sensing mechanism of Pd-promoted SnO2 by XAS in operando conditions
Thomas Neisius, Bernard Chenevier, Aleksandre M. Gaskov, Michel Labeau
DOI: 10.1039/B509826B
Easy access to the family of thiazole N-oxides using HOF·CH3CN
Elizabeta Amir, Shlomo Rozen
DOI: 10.1039/B602594C
Non-stoichiometry induced by differential oxygen/lone pair occupation in chiral bicyclic 1,1′-binaphthoxy cyclodiphosphazanes
Manab Chakravarty, Praveen Kommana, K. C. Kumara Swamy
DOI: 10.1039/B509327A
You might also like
What are the main uses of 1H-Indazole-6-carbonitrile (CAS: 141290-59-7)?
1H-Indazole-6-carbonitrile finds applications in pharmaceuticals, where it serve...
How should waste containing Dioctyl (2E)-2-butenedioate (CAS: 2997-85-5) be handled?
Waste containing Dioctyl (2E)-2-butenedioate (CAS: 2997-85-5) should be collecte...
What industries use Sodium [(1,2-benzoxazol-3-ylmethyl)sulfonyl]azanide (CAS: 68291-98-5)?
Sodium [(1,2-benzoxazol-3-ylmethyl)sulfonyl]azanide is primarily used in pharmac...
Are there alternatives to Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,6-pyridinedicarboxylate (CAS: 741709-66-0) in synthesis?
Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,6-pyridinedicarboxyla...
How should waste containing 2-Fluoro-6-hydrazinopyridine (CAS: 80714-39-2) be handled?
Waste containing 2-Fluoro-6-hydrazinopyridine (CAS: 80714-39-2) should be manage...
What is 6-Formyl-2-pyridinecarboxylic acid (CAS: 499214-11-8)?
6-Formyl-2-pyridinecarboxylic acid is an organic compound with the molecular for...
What is the market or research trend for 3-(3,4-dimethoxyphenyl)-2,5-dimethyl-N-(2-morpholin-4-ylethyl)pyrazolo[1,5-a]pyrimidin-7-amine (CAS: 900874-91-1)?
Research trends for this compound indicate a focus on its potential applications...
How is 9H-Tribenzo[b,d,f]azepine (CAS: 29875-73-8) typically synthesized?
9H-Tribenzo[b,d,f]azepine is typically synthesized via a multi-step process invo...
How is 1-Cyclopropyl-7-ethoxy-6-fluoro-8-methoxy-4-oxo-1,4-dihydro-3-quinolinecarboxylic acid (CAS: 1797982-51-4) typically synthesized?
1-Cyclopropyl-7-ethoxy-6-fluoro-8-methoxy-4-oxo-1,4-dihydro-3-quinolinecarboxyli...
How should waste containing Methyl 3-oxo-1,2,3,4-tetrahydro-6-quinoxalinecarboxylate (CAS: 671820-52-3) be handled?
Waste containing Methyl 3-oxo-1,2,3,4-tetrahydro-6-quinoxalinecarboxylate (CAS: ...
Source Journal
Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.
![Sodium 3-[(E)-(4-anilinophenyl)diazenyl]benzenesulfonate structure Sodium 3-[(E)-(4-anilinophenyl)diazenyl]benzenesulfonate structure](https://static.chemtradehub.com/structs/587/587-98-4-035f.webp)



