Toyohashi University of Technology , often abbreviated to Toyohashi Tech, or TUT, is a national engineering university located in Toyohashi, Aichi, Japan. Distinguished for the upper-division student body where over 80% of them are transfer students from 5-year Technical Colleges called Kōsens, the Toyohashi Tech is one of the only two Universities of Technology, a form of universities in Japan, the other being Nagaoka University of Technology. Toyohashi Tech is also noted for the fact that majority of the students proceed to graduate schools. The university is locally nicknamed Gikadai . Wikipedia.
Shibatomi K.,Toyohashi University of Technology
Synthesis | Year: 2010
This review focuses on the enantioselective synthesis of halogenated molecules having a chiral halocarbon center. In particular, this review discusses enantioselective transformations with haloalkenes and enantioselective -substitutions of -halo carbonyl compounds. Enantioselective halogen-transfer reactions are excluded from this review. 1 Introduction 2 Enantioselective Transformations with Halogenated Alkenes 2.1 Diels-Alder Reactions 2.2 Cyclopropanations 2.3 Hydrogenations and Epoxidations 2.4 Conjugate Additions to Halogenated Alkenes and Miscellaneous Reactions 3 Enantioselective -Functionalizations of -Halo Carbonyl Compounds or Their Enolates 3.1 Aldol-type Reactions 3.2 Alkylations with Phase-Transfer Catalysts and Allylations with Palladium Catalysts 3.3 Conjugate Additions of -Halo Carbonyl Compounds 3.4 Heterofunctionalizations and Protonations 4 Conclusions. © Georg Thieme Verlag Stuttgart.
Tran T.V.,Toyohashi University of Technology
Nature Materials | Year: 2016
Molybdenum sulfides are very attractive noble-metal-free electrocatalysts for the hydrogen evolution reaction (HER) from water. The atomic structure and identity of the catalytically active sites have been well established for crystalline molybdenum disulfide (c-MoS2) but not for amorphous molybdenum sulfide (a-MoSx), which exhibits significantly higher HER activity compared to its crystalline counterpart. Here we show that HER-active a-MoSx, prepared either as nanoparticles or as films, is a molecular-based coordination polymer consisting of discrete [Mo3S13]2- building blocks. Of the three terminal disulfide (S2 2-) ligands within these clusters, two are shared to form the polymer chain. The third one remains free and generates molybdenum hydride moieties as the active site under H2 evolution conditions. Such a molecular structure therefore provides a basis for revisiting the mechanism of a-MoSx catalytic activity, as well as explaining some of its special properties such as reductive activation and corrosion. Our findings open up new avenues for the rational optimization of this HER electrocatalyst as an alternative to platinum. © 2016 Nature Publishing Group
Yoshida E.,Toyohashi University of Technology
Colloid and Polymer Science | Year: 2010
The photoradical polymerization of vinyl acetate was performed using 4-methoxy-2,2,6,6-tetramethylpiperidine-1-oxyl (MTEMPO) as the mediator in the presence of bis(alkylphenyl)iodonium hexafluorophosphate (BAI). The MTEMPO/BAI system using 2,2'-azobis(isobutyronitrile) or 2,2'-azobis(4-methoxy-2,4- dimethylvaleronitrile) as the initiator did not succeed in controlling the molecular weight and produced polymers that showed a bimodal gel permeation chromatography with the broad molecular weight distribution. On the other hand, the polymerization using 1-(cyano-1-methylethoxy)-4-methoxy-2,2,6,6- tetramethylpiperidine and BAI proceeded by the living mechanism based on linear increases in the first order time-conversion and conversion-molecular weight plots. The molecular weight distribution also increased with the increasing conversion due to cloudiness of the solution as the polymerization proceeded. It was found that the polymerization had a photolatency because the propagation stopped by interruption of the irradiation and was restarted by further irradiation. © 2009 Springer-Verlag.
Rahman M.M.,Toyohashi University of Technology
Journal of Biomedical Nanotechnology | Year: 2011
L-glutamate sensor based on glutamate oxidase (GLOx) has been fabricated on N-(3- dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC) activated thioglycolic acid (TGA) self-assembled monolayer (SAM) on smart bio-device using mediator-free simple phosphate buffer system (PBS), where TGA-SAM is used as an enzyme immobilization background. The glutamate sensor displayed a low detection limit (DL, 0.089±0.002 μM), a wide linear dynamic range (LDR, 0.1 μM to10.0 mM), good linearity (R = 0.9931), and higher sensitivity (20.75±1.0 μmM -1cm -2), small sample volume (70.0 μl), as well as good stability and reproducibility. The smart-biodevice system exemplified a simple and efficient approach to the assimilation of GLOx and sensing surface, which can provide analytical access to a large group of enzymes for wide range of bioelectrochemical applications in health care fields. Copyright © 2011 American Scientific Publishers All rights reserved.
Mori K.-I.,Toyohashi University of Technology
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2012
Smart hot stamping processes of ultra-high strength steel parts have been developed to overcome difficulties in the present hot stamping process. Using rapid resistance heating, the stamping equipment became considerably simpler than that using furnace heating. The formability was improved by high speed hot stamping using a mechanical servo press in comparison with the conventional process using a hydraulic press. Parts having a different distribution of strength were produced by tailored die quenching using local bypass resistance heating. Die-quenched steel parts and ultra-high strength steel sheets were sheared by reducing the flow stress in the shearing zone using local resistance heating. An ultra-high strength steel gear drum was produced by hot spline forming using resistance heating of side wall of a cup. V-shaped hot forming using sealed air was developed to produce ultra-high strength hollow axle beams used for suspensions of automobiles. A one shot hot stamping process consisting of resistance heating, forming, shearing and die quenching was applicable to comparatively small high strength steel parts. © 2012 The Nonferrous Metals Society of China.