Author
Hiroyuki Ohno
Other affiliations: University of Agriculture, Faisalabad, University of Tokyo, California Institute of Technology ...read more
Bio: Hiroyuki Ohno is an academic researcher from Tokyo University of Agriculture and Technology. The author has contributed to research in topics: Ionic liquid & Ionic conductivity. The author has an hindex of 77, co-authored 618 publications receiving 26841 citations. Previous affiliations of Hiroyuki Ohno include University of Agriculture, Faisalabad & University of Tokyo.
Papers published on a yearly basis
Papers
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TL;DR: The goal in this review is to survey the recent key developments and issues within ionic-liquid research in these areas, and to generate interest in the wider community and encourage others to make use of ionic liquids in tackling scientific challenges.
Abstract: Ionic liquids are room-temperature molten salts, composed mostly of organic ions that may undergo almost unlimited structural variations. This review covers the newest aspects of ionic liquids in applications where their ion conductivity is exploited; as electrochemical solvents for metal/semiconductor electrodeposition, and as batteries and fuel cells where conventional media, organic solvents (in batteries) or water (in polymer-electrolyte-membrane fuel cells), fail. Biology and biomimetic processes in ionic liquids are also discussed. In these decidedly different materials, some enzymes show activity that is not exhibited in more traditional systems, creating huge potential for bioinspired catalysis and biofuel cells. Our goal in this review is to survey the recent key developments and issues within ionic-liquid research in these areas. As well as informing materials scientists, we hope to generate interest in the wider community and encourage others to make use of ionic liquids in tackling scientific challenges.
4,098 citations
TL;DR: Amino acid ionic liquids dissolved native amino acids, despite water-free conditions, and are soluble in various organic solvents, such as chloroform.
Abstract: We first succeeded in synthesizing ionic liquids from 20 natural amino acids. Amino acid ionic liquids dissolved native amino acids, despite water-free conditions. Furthermore, these ionic liquids are soluble in various organic solvents, such as chloroform. Effects of acidity, hydrogen bonding ability, and steric factors on the properties of these ionic liquids were analyzed as the function of side groups.
1,101 citations
TL;DR: In this paper, a series of alkylimidazolium salts containing dimethyl phosphate, methyl methylphosphonate, or methyl phosphonate were obtained as room temperature ionic liquids, which have the potential to solubilize cellulose under mild conditions.
727 citations
TL;DR: Unique phase behavior of the resulting hydrophobic ionic liquids and water mixture is found; the mixture is clearly phase separated at room temperature, but the solubility of water in this IL increases upon cooling, to give a homogeneous solution.
Abstract: The preparation of ionic liquids derived from amino acids, and their properties, are outlined Since amino acids have both a carboxylic acid residue and an amino group in a single molecule, they can be used as either anions or cations These groups are also useful in their ability to introduce functional group(s) Twenty different natural amino acids were used as anions, to couple with the 1-ethyl-3-methylimidazolium cation The salts obtained were all liquid at room temperature The properties of the resulting ionic liquids (AAILs) depend on the side groups of the amino acids involved These AAILs, composed of an amino acid with some functional groups such as a hydrogen bonding group, a charged group, or an aromatic ring, had an increased glass transition (or melting) temperature and/or higher viscosity as a result of additional interactions among the ions Viscosity is reduced and the decomposition temperature of imidazolium-type salts is improved by using the tetrabutylphosphonium cation The chirality of AAILs was maintained even upon heating to 150 degrees C after acetylation of the free amino group The amino group was also modified to introduce a strong acid group so as to form hydrophobic and chiral ionic liquids Unique phase behavior of the resulting hydrophobic ionic liquids and water mixture is found; the mixture is clearly phase separated at room temperature, but the solubility of water in this IL increases upon cooling, to give a homogeneous solution This phase change is reversible, and separation occurs again by raising the temperature a few degrees It is extraordinary for an IL/water mixture to display such behavior with a lower critical solution temperature Some likely applications are proposed for these amino acid derived ionic liquids
540 citations
TL;DR: Low viscosity, polar, and halogen-free ionic liquids are prepared as potential solvents for a wide range of polysaccharides including amylose and (scarcely soluble) cellulose under mild condition.
478 citations
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28 Jul 2005
TL;DR: PfPMP1）与感染红细胞、树突状组胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作�ly.
Abstract: 抗原变异可使得多种致病微生物易于逃避宿主免疫应答。表达在感染红细胞表面的恶性疟原虫红细胞表面蛋白1（PfPMP1）与感染红细胞、内皮细胞、树突状细胞以及胎盘的单个或多个受体作用，在黏附及免疫逃避中起关键的作用。每个单倍体基因组var基因家族编码约60种成员，通过启动转录不同的var基因变异体为抗原变异提供了分子基础。
18,940 citations
TL;DR: Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density.
Abstract: In this critical review, metal oxides-based materials for electrochemical supercapacitor (ES) electrodes are reviewed in detail together with a brief review of carbon materials and conducting polymers. Their advantages, disadvantages, and performance in ES electrodes are discussed through extensive analysis of the literature, and new trends in material development are also reviewed. Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density of ES (476 references).
7,642 citations
TL;DR: The phytochemical properties of Lithium Hexafluoroarsenate and its Derivatives are as follows: 2.2.1.
Abstract: 2.1. Solvents 4307 2.1.1. Propylene Carbonate (PC) 4308 2.1.2. Ethers 4308 2.1.3. Ethylene Carbonate (EC) 4309 2.1.4. Linear Dialkyl Carbonates 4310 2.2. Lithium Salts 4310 2.2.1. Lithium Perchlorate (LiClO4) 4311 2.2.2. Lithium Hexafluoroarsenate (LiAsF6) 4312 2.2.3. Lithium Tetrafluoroborate (LiBF4) 4312 2.2.4. Lithium Trifluoromethanesulfonate (LiTf) 4312 2.2.5. Lithium Bis(trifluoromethanesulfonyl)imide (LiIm) and Its Derivatives 4313
5,710 citations
TL;DR: In this article, the authors present the present status of lithium battery technology, then focus on its near future development and finally examine important new directions aimed at achieving quantum jumps in energy and power content.
4,363 citations