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Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
Table of Contents
Australian Journal of Chemistry

Australian Journal of Chemistry

Volume 72 Numbers 1 & 2 2019

Professor Ken Seddon In Memoriam

CH18541Ionic Liquids – Further Progress on the Fundamental Issues

Mega Kar, Natalia V. Plechkova, Kenneth R. Seddon, Jennifer M. Pringle and Douglas R. MacFarlane
pp. 3-10
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Progress and challenges in addressing the fundamental issues in ionic liquid chemistry are discussed, including the broadening scope of mixture systems that form part of this field, thermal stability, biodegradation, nomenclature, ion pairing, and electrochemical properties.

CH18116Thermal Conductivity Enhancement Phenomena in Ionic Liquid-Based Nanofluids (Ionanofluids)

Kamil Oster, Christopher Hardacre, Johan Jacquemin, Ana P. C. Ribeiro and Abdulaziz Elsinawi
pp. 21-33
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(Io)nanofluids are very interesting materials for heat transfer processes. They combine the specific properties of ionic liquids (i.e. low vapour pressure), and enhanced thermophysical properties (in particular thermal conductivity) caused by the dispersed nanoparticles. The mechanism and modelling of thermal conductivity are a particular consideration in this work.

CH18104Surface-Active Ionic Liquids in Catalytic Water Splitting

Alice Cognigni, Ádám Márk Palvögyi, Christian Schröder, Herwig Peterlik, Alexander R. M. Müllner, Ronald Zirbs, Matthias Weil and Katharina Bica
pp. 34-41
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We present the application of imidazolium-based surface-active ionic liquids as ligands and optional reaction media in iridium-catalyzed water oxidations and report a strong influence of ionic liquid concentration in water on the catalytic performance.

CH18187Photo-Luminescence Dynamics of Ionic Liquids Composed of the Dicyanoaurate(I) Anion

Yoshifumi Kimura, Takamitsu Narita, Saki Tanaka, Mitsuhiro Taniguchi, Kaori Fujii, Takatsugu Endo, Yoshiro Yasaka and Masakatsu Ueno
pp. 42-48
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Photo-excitation dynamics of ionic liquids composed of dicyanoaurate(i) have been studied by ultrafast time-resolved luminescence spectroscopy. The low energy band of the dual luminescence bands showed a dynamic shift with time depending on the cation species and excitation wavelength. The shift is discussed in relation to the oligomer formation of anions in the ionic liquids.

CH18170Effect of Alkyl Chain Length in Anions on the Physicochemical Properties of Cellulose-Dissolving Protic Ionic Liquids

Hideki Hanabusa, Yuko Takeoka, Masahiro Rikukawa and Masahiro Yoshizawa-Fujita
pp. 55-60
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A protic ionic liquid (PIL) composed of 1,8-diazabicyclo[5.4.0]-undec-7-ene (DBU) and acetic acid can dissolve cellulose under mild conditions and catalyse its transesterification. In this study, PILs composed of DBU and carboxylic acids with varying alkyl chain lengths were prepared, and the relationship between physicochemical properties and chemical structures was investigated.

CH18270Liquid Structures and Transport Properties of Lithium Bis(fluorosulfonyl)amide/Glyme Solvate Ionic Liquids for Lithium Batteries

Shoshi Terada, Kohei Ikeda, Kazuhide Ueno, Kaoru Dokko 0000-0002-9622-4345 and Masayoshi Watanabe
pp. 70-80
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In solvate ionic liquids composed of lithium bis(fluorosulfonyl)amide (Li[FSA]) and glyme, charge transport through the ligand exchange of Li+ emerges when the molar ratio of Li[FSA]/glyme is higher than 1.

CH18361Dissolution of Amyloid Aggregates in Aqueous Ionic Liquid Solutions: A Case Study of Insulin Amyloid

Takahiro Takekiyo, Yuka Ishikawa, Erika Yamaguchi, Natsuki Yamada and Yukihiro Yoshimura
pp. 81-86
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Imidazolium-based ILs showed a higher dissolution ability for bovine insulin amyloid aggregates than ammonium-based ILs for all concentrations of x (x = 0–30 mol-% IL). The mechanisms of dissolution by ILs across a broad IL concentration range for insulin amyloid aggregates is described.

CH18368Crystal Polymorphs and Multiple Crystallization Pathways of Highly Pressurized 1-Ethyl-3-Methylimidazolium Nitrate

Hiroshi Abe, Takahiro Takekiyo, Yukihiro Yoshimura, Nozomu Hamaya and Shinichiro Ozawa
pp. 87-92
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Multiple crystallization pathways of 1-ethyl-3-methylimidazolium nitrate, [C2mim][NO3], were switched at the bifurcation pressure (PB). PB was determined by the high pressure-inherent conformer (P′) of C2mim+ anion.

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The structural fluctuation and mixing state of aqueous solutions of tetrabutylphosphonium trifluoroacetate, ([P4,4,4,4]CF3COO), which exhibits a lower-critical-solution-temperature-type phase transition, were investigated. The relationship between the mesoscopic fluctuations and the macroscopic phase transition was clarified by drawing a contour map of the fluctuations on the phase diagram.

CH18378Binary Ionic Liquid System for Direct Cellulose Etherification

Takeshi Kakibe, Satoshi Nakamura, Kiyokazu Amakuni and Hajime Kishi
pp. 101-105
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Several mixtures of ionic liquids, playing roles in both cellulose dissolution and catalysis, were synthesised. Cellulose etherification was performed in these IL mixtures. The proportion of propoxy cellulose exceeded 2.5 after 24 h.

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The electroreduction of TNT and DNT in the presence of oxygen, moisture (humidity), and other nitroaromatic compounds is studied. Although currents for TNT were unaffected by oxygen, DNT currents were significantly affected. Humid environments were found to have a large effect on the voltammetry for both compounds. Importantly, DNT and TNT could be separately identified and quantified in a mixture.

CH18384Protic Ionic Liquids Based on Oligomeric Anions [(HSO4)(H2SO4)x] (x = 0, 1, or 2) for a Clean ϵ-Caprolactam Synthesis

Karolina Matuszek, Alina Brzeczek-Szafran, Dominika Kobus, Douglas R. MacFarlane, Małgorzata Swadźba-Kwaśny and Anna Chrobok
pp. 130-138
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Inexpensive Brønsted-acidic ionic liquids based on nitrogen bases and sulfuric acid, suitable for industrial-scale catalysis, as reaction media and catalysts for the Beckmann rearrangement of cyclohexanone oxime to ϵ-caprolactam are reported. The advantages of the proposed method are a high conversion of oxime with very good selectivity after 15 min of reaction and omission of the neutralisation step.

CH18481Using Thermodynamics to Assess the Molecular Interactions of Tetrabutylphosphonium Carboxylate–Water Mixtures

Darius J. Yeadon 0000-0002-5164-9411, Johan Jacquemin, Natalia V. Plechkova, Margarida Costa Gomes and Kenneth R. Seddon
pp. 144-154
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In this study, the interactions between tetrabutylphosphonium carboxylates and water were assessed by thermodynamic measurements. Densities, ρ, viscosities, η, and enthalpies of mixing, ΔmixH, of binary [P4 4 4 4][CnCOO]–water mixtures (with n = 1, 2 or 7) were determined at atmospheric pressure as a function of temperature.

CH18349Cluster–Micelle Transition of a Thermo- and Photoresponsive ABC Triblock Copolymer in an Ionic Liquid

Aya Saruwatari, Kei Hashimoto, Ryota Tamate, Ryoji Usui, Hisashi Kokubo and Masayoshi Watanabe
pp. 155-159
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We report the photocontrollable micelle–cluster transition of an ABC triblock copolymer in an ionic liquid. With decreasing temperature, the triblock copolymer changes its self-assembled structure from micelles into clusters due to the aggregation of photo- and thermoresponsive blocks. Under UV irradiation, the micelles form clusters at lower temperatures than that in the dark.

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