| Autor: |
Kabita Boruah, Shahnaz Rohman, Ankur K. Guha, Sukanya Das, Ruli Borah |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Journal of Ionic Liquids, Vol 3, Iss 2, Pp 100062- (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2772-4220 |
| DOI: |
10.1016/j.jil.2023.100062 |
| Popis: |
Two types of six Brӧnsted acidic ionic liquids of N-SO3H tethered cyclic ammonium cations (five, six and seven membered) with four anions namely [AcO]−, [HSO4]−, [BF4]−, [PF6]− were synthesized to evaluate their physical and electrochemical behavior in polar solvents (water, MeOH & CH3CN) using conductivity and Cyclic Voltammetry techniques. Their comparative Brönsted acidic orders were determined using UV–visible Hammett plots. Except the ionic liquid of [PF6]− anion with N,N-disulfopiperidinium cation, the thermal stabilities of other ionic liquids found within 230–250 °C. Solvent dependent aggregative nature was observed in polar solvents for the ionic liquids at a particular temperature and concentration. Their aggregative properties were also evidenced by comparison of experimental and computed chemical shift values of additional acidic protons of 1H NMR spectra. Kamlet-Taft solvatochromic parameters of molecular solvents (ETN, α, β) were correlated with their observed conductivities. Piperidinium ionic liquids showed wider electrochemical windows (2.99 V to 2.55 V) in acetonitrile as compared to other cyclic ammonium ionic liquids in polar solvents. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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