研究者詳細 - 森口　哲次

論文 - 森口　哲次

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Ultrasound-assisted removal of contaminants on stainless steel surfaces using nitrogen ultrafine bubble water 査読有り国際誌

Nakahara M., Watanabe S., Kimura S., Sasaki M., Inagaki H., Moriguchi T.

Progress in Nuclear Energy 172 2024年07月

担当区分：最終著者記述言語：英語掲載種別：研究論文（学術雑誌）

In this study, a novel ultrasound-assisted removal/decontamination process using ultrafine bubbles (UFBs) of 1 μm or less diameter gas bubbles is proposed to reduce secondary radioactive waste for decommissioning of nuclear installations. The removal/decontamination technique does not require abrasive media for abrasive-blasting decontamination or chemical reagents for chemical decontamination. The removal experiments with simulated contaminants (Co oxides) on the surface of a stainless steel 316 (SUS316) plate were conducted, and the removal performance was confirmed using UFB water via ultrasonic irradiation at 1.6 MHz. The experimental results indicate that the UFBs adhere to the contaminants and move into the cracked Co oxides and the gap between the contaminants and the SUS316 plate. The vibration of UFBs and the impact due to the collapse of cavitation bubbles emitting ultrasound will exfoliate the contaminants. Decontamination experiments using fuel pin end plugs contaminated with radioactive materials, such as 60Co, were performed to evaluate the decontamination performance of various kinds of contaminants. The decontamination performance of 60Co in the fuel pin end plugs was different from that of non-radioactive Co oxides in the removal experiments, and the difference in the chemical states of Co affects the removal/decontamination behavior in the N2-UFB water. Therefore, understanding the properties of contaminants before the decontamination operation is necessary to maximize the decontamination performance with UFBs.

DOI： 10.1016/j.pnucene.2024.105195

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STRAD project for systematic treatments of radioactive liquid wastes generated in nuclear facilities 査読有り国際誌

Watanabe S., Ogi H., Arai Y., Aihara H., Takahatake Y., Shibata A., Nomura K., Kamiya Y., Asanuma N., Matsuura H., Kubota T., Seko N., Arai T., Moriguchi T.

Progress in Nuclear Energy 117 2019年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

A new collaborative research project for systematic treatments of radioactive liquid wastes containing various reagents generating in nuclear facilities was started from 2018 initiated by Japan Atomic Energy Agency. The project was named as STRAD (Systematic Treatments of RAdioactive liquid wastes for Decommissioning) project. Tentative targets to be studied under the project are aqueous and organic liquid wastes which have been generated by experiments and analyses in a reprocessing experimental laboratory of JAEA. Currently fundamental studies for treatments of the liquid wastes with complicated compositions are underway. In the STRAD project, process flow for treatment of ammonium ion involved in aqueous waste was designed though the inactive experiments, and decomposition of ammonium ion using catalysis will be carried out soon. Adsorbents for recovery of U and Pu from spent solvent were also developed. Demonstration experiments on genuine spent solvent is under planning.

DOI： 10.1016/j.pnucene.2019.103090

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Investigation into the molecular and electronic structures of a newly synthesized o-quinone derivative 査読有り国際誌

Hamamoto N., Arae S., Moriguchi T., Irie R., Fujimoto H.

Chemical Physics 524 77 - 84 2019年08月

記述言語：英語掲載種別：研究論文（学術雑誌）

We studied on the geometric and electronic structures of a newly synthesized compound, 3-(tert-butyl)dinaphtho[1,2-b;1′,2′-d]furan-12,13-dione (1), having a twisted molecular structure at an o-quinone region in a crystal. The density functional theory (DFT)has been applied to investigate the geometric and electronic structures using the model compound (1H), where a tertiary butyl group of the compound 1 is replaced by a hydrogen atom. The optimized geometry for the model dimer of 1H represented well the twisted molecular structure of 1. The time-dependent DFT method explained the observed optical properties of 1 in a solution and a powdery solid. The DFT calculations also gave a good estimation of the ionization potential and the electron affinity of 1H, explaining a similarity in reduction and a difference in oxidation between 1H and o-benzoquinone. This similarity in the electron affinity was confirmed by measuring a reduction potential of the compound 1 with cyclic voltammetry.

DOI： 10.1016/j.chemphys.2019.04.033

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Design, Synthesis, Crystal Structure and Photophysical Properties of New Oxadiazole Extended Viologen Fluorophore 査読有り国際誌

Tetsuji Moriguchi, Masataka Okuyama, Venkataprasad Jalli

Crystal Structure Theory and Applications ( Scientific Research Publishing Inc. ) 2021 ( 10 ) 27 - 37 2021年03月

Design, Synthesis, Crystal Structure and Photoluminescence Properties of Four New Europium (III) Complexes with Fluorinated β-Diketone Ligand 査読有り国際誌

Tetsuji Moriguchi, Hiromasa Kawata, Venkataprasad Jalli

Crystal Structure Theory and Applications ( Scientific Research Publishing Inc. ) 2021 ( 10 ) 1 - 13 2021年02月

Synthesis, characterization and photophysical properties of two novel n-type semiconductor materials with trifluoromethyl and cyano groups 査読有り国際誌

Tetsuji Moriguchi, Daisuke Yakeya, Venkataprasad Jalli

Journal of Molecular Structure ( Elsevier ) 2019 ( 1185 ) 403 - 409 2019年05月

Synthesis of three new thiophene condensed pyrene derivatives, crystal structure and evaluation of their photophysical properties 査読有り

Moriguchi T., Yakeya D., Tsuge A., Jalli V.

Journal of Molecular Structure 1157 348 - 354 2018年04月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2017 Elsevier B.V. Three new thiophene condensed fluorescent pyrene derivatives have been synthesized by a two-step process, via. Wittig reaction followed by iodine promoted photocyclization. These molecules have been characterized by1H NMR and EI-MS. Further, the molecular structures of 4a, 4b and 4c has been confirmed by single crystal X-ray diffraction analysis. The protons located in the fjord and cove-regions of molecules 4b and 4c showed downfield shifts of the protons. Molecule 4a crystallized under monoclinic system with space group P21/c, molecule 4b crystallized under monoclinic system with space group C2/c and the molecule 4c crystalized under triclinic system with space group P-1. Molecules 4a, 4b and 4c showed strong absorption maxima wavelengths at 305, 358 and 330 nm, respectively. The molar extinctinction coefficients (ε) of the compounds 4a, 4b and 4c indicated molecule 4c has better ability to absorb UV light, molecule 4b has better fluorescence intensity than molecule 4a and 4c.

DOI： 10.1016/j.molstruc.2017.12.081

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On-off switching of gel formation by red-ox reaction 査読有り

Yakeya D., Moriguchi T., Tsuge A.

Tetrahedron Letters 59 ( 8 ) 712 - 714 2018年02月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2018 Elsevier Ltd Organogelator candidates which consist of the ferrocene unit have been prepared. It has been suggested that two amino acid residues in the structure are necessary to form a stable organogel. Addition of an oxidizing agent such as NaClO induces the collapse of the gel, and reproduction of the gel was observed by addition of a reducing agent such as glutathione. It has been found out that the on-off switching of gel formation can be achieved by red-ox reaction.

DOI： 10.1016/j.tetlet.2018.01.013

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Synthesis, crystal structure and photo physical properties of isomeric fluorinated s-shaped polyaromatic dibenzo[c,l]chrysene derivatives 査読有り

Moriguchi T., Tabuchi D., Yakeya D., Tsuge A., Jalli V., Yoza K.

Journal of Molecular Structure 1152 37 - 43 2018年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2017 Elsevier B.V. Two s-shaped fluorinated isomeric polyaromatic dibenzo[c,l]chrysene derivatives have been synthesized by a two step process using the Wittig, Heck and iodine promoted cyclization reactions. These cyclized compounds were characterized by1H NMR and EI-MS. Further, absolute configurations of isomeric 4a and 4b were determined by X-ray diffraction analysis. Compound 4a crystallized under monoclinic system with space group P21/c and compound 4b crystallized under monoclinic system with space group Cc. They have good solubility in common organic solvents such as dichloromethane, chloroform and THF. Photophysical properties of 4a and 4b were evaluated by using UV–Visible and Fluorescence spectrophotometer. Compounds 4a and 4b showed strong absorption maximum wavelength at 317 nm. The emission spectra of 4a and 4b displayed sharp peaks in the visible region from 417 to 441 nm. The shape of the UV–Visible and Fluorescence spectra of 4a and 4b looks almost identical. But compound 4a exhibited better fluorescence intensity than compound 4b. This difference may be due to the difference in the configuration of compounds 4a and 4b.

DOI： 10.1016/j.molstruc.2017.09.057

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Synthesis of two novels-shaped dibenzo[c,l] chrysene derivatives, crystal structure, and the evaluation of their photophysical properties 査読有り

Moriguchi T., Tabuchi D., Yakeya D., Tsuge A., Jalli V.

Crystals 7 ( 8 ) 2017年08月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2017 by the authors. Licensee MDPI, Basel, Switzerland. Two s-shaped polyaromatic dibenzo[c,l]chrysene derivatives have been synthesized by a two-step process, via. The Wittig reaction, followed by iodine, promoted photocyclization. These molecules have been characterized by 1 H NMR, FAB-MS, and elemental analysis. Further, the molecular structures of 4a and 4b have been confirmed by single crystal X-ray diffraction analysis. The protons located in the cove-regions of molecules 4a and 4b showed downfield shifts of the protons. Molecule 4a crystallized under the monoclinic system with space group C2/c, and the molecule 4b crystallized under the monoclinic system with space group P2 1 /n. Molecules 4a and 4b showed strong absorption maxima wavelengths at 310 nm and 324 nm, respectively. The molar extinctinction coefficients (ε) of the compounds 4a and 4b indicated that molecule 4b has a better ability to absorb UV light than molecule 4a. The emission spectra of the molecules 4a and 4b displayed peaks in the region 429–456 nm. The shape of the UV-Visible and Fluorescence spectra of the molecules 4a and 4b look almost identical. However, molecule 4b exhibited better fluorescence intensity than molecule 4a. This may be due to the difference in the substituents of molecules 4a and 4b.

DOI： 10.3390/cryst7080251

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Design and properties of glutamic acid-based coumarin derivatives as organogelators 査読有り

Yakeya D., Kitou N., Kinugawa S., Moriguchi T., Tsuge A.

Tetrahedron 73 ( 27-28 ) 3973 - 3978 2017年07月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2017 Two kinds of glutamaic acid-based coumarin derivatives show a quite different trend against gelation in organic solvents in terms of inter- or intramolecular hydrogen bonds involved. It has been found out that addition of the valinate structure into the coumarine derivative could improve its gelation ability.

DOI： 10.1016/j.tet.2017.05.074

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The syntheses, crystal structure and luminescence properties of cone-like octadentate europium (III) complexes with four short alkoxy substituents 査読有り

Moriguchi T., Hirosaki S., Jalli V., Tsuge A., Yoza K.

Crystals 7 ( 3 ) 2017年03月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2017 by the authors. Licensee MDPI, Basel, Switzerland. Treatment of 1-(4′-methoxy or ethoxy phenyl)-4,4,4-trifluoro-1,3-butanedione with europium (III) chloride in the presence of piperidine resulted in the halide ligands exchange yielded new piperidinium tetrakis{1-(4′-methoxy or ethoxy phenyl)-4,4,4-trifluoro-1,3-butanedionato} europate (III) complexes 2a and 2b. Complexes 2a and 2b have been characterized by elemental analysis, 1 H NMR spectroscopy, and FAB-MS, and their absolute structures were determined by single crystal X-ray diffraction analysis. The complexes 2a and 2b have the monoclinic space groups C2/c (No. 15, 4′-substituent = OCH 3 ) and with P − 1 (No. 2, 4′-substituent = OC 2 H 5 ), respectively. X-ray analysis results showed that eight coordinate structures of the complexes 2a and 2b have conelike structures, like calix[4]arenes, but their structures were slightly different due to the crystal packing and the existence of the solvent molecule. The complexes 2a and 2b exhibited identical, strong photoluminescence emissions in the solution phase.

DOI： 10.3390/cryst7030085

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Synthesis, characterization and air stable semiconductor properties of thiophene-condensed pyrene derivatives 査読有り

Moriguchi T., Higashi M., Yakeya D., Jalli V., Tsuge A., Okauchi T., Nagamatsu S., Takashima W.

Journal of Molecular Structure 1127 413 - 418 2017年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2016 Elsevier B.V. New and simple polyaromatic compounds containing two thiophene rings were prepared via photo-cyclization and their structural and photophysical properties were evaluated via 1 H NMR spectroscopy and X-ray crystallographic analysis. On the basis of X-ray analysis, it was determined that the molecular structure of the compound was highly strained and that they contain two hetero [4] helicene moieties. The compounds were investigated as active layer in p-type organic field-effect transistors (p-OFET) in top contact type devices. Notably, the compound containing two thiophene components exhibited very stable p-type semiconducting behavior in moist air.

DOI： 10.1016/j.molstruc.2016.07.104

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2,5-Bis(3,4-dimethoxyphenyl)-1,3,4-oxadiazole 査読有り

Tetsuji Moriguchi, Ryota Kamoto, Venkataprasad Jalli, Akihiko Tsuge

IUCr DATA 1 x160167 - x160167 2016年02月

One-pot four component synthesis of novel 3-furyl coumarin derivatives 査読有り

VENKATA PRASAD JALLI, SUVRATHA KRISHNAMURTHY, TETSUJI MORIGUCHI,AKIHIKO TSUGE

Journal of Chemical Sciences 128 ( 2 ) 217 - 226 2016年02月

Efficient synthesis of novel pyrrolo[2,3-c]pyridone derivatives using the Ugi four-component reaction followed by condensation reaction 査読有り

VenkataPrasad J., Krishnamurthy S., Moriguchi T., Tsuge A.

New Journal of Chemistry 41 ( 1 ) 97 - 107 2016年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

© The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. An efficient, mild and multicomponent synthesis of novel heterocyclic compounds possessing the pyrrolo[2,3-c]pyridone backbone was achieved using the Ugi four-component reaction and post-condensation of the Ugi adduct. This method offers many advantages, such as an easy handling procedure, atom economy, short reaction time, and a huge molecular library that can be synthesized by changing the substituents on the four independent starting materials. This methodology was also successfully employed for the electron deficient anilines and phenyl glyoxylic acids having CF 3 group. All the products were characterized using NMR ( 1 H and 13 C) spectroscopy and FAB mass spectrometry. Product 6g was further characterized by X-ray diffraction analysis.

DOI： 10.1039/C6NJ02569B

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syn-6,15-Dihydroxy-2,11-dithia[3.3]metacyclophane ethyl acetate monosolvate 査読有り

Tetsuji Moriguchi, Daisuke Miyamoto, Ventakaprasad Jalli, Kenji Yoza, Akihiko Tsuge

IUCr DATA 1 x160082 - x160082 2016年01月

3,5,7-Triacetoxy-2-(3,4-diacetoxyphenyl)-4H-1-benzopyran-4-one 査読有り

Tetsuji Moriguchi, Kozue Sakao, De-Xing Hou, Kenji Yoza

IUCr DATA 1 x160028 - x160028 2016年01月

Organogelators based on metacyclophane skeleton having urea units in the bridge 査読有り

Tsuge A., Fujiwara T., Yakeya D., Kawasaki H., Moriguchi T., Araki K.

Tetrahedron 71 ( 50 ) 9429 - 9432 2015年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

© 2015 Elsevier Ltd.All rights reserved. Metacyclophanes having the urea units in their bridge have been prepared. It has been found out that some of them afford stable organogels in some solvents. It was also observed that addition of fluoride anion broke DMSO gel, and then this gel was formed again by addition of MeOH.

DOI： 10.1016/j.tet.2015.10.056

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Crystal structure of ethyl 2-(2-{1-[N-(4-bromophenyl)-2-oxo-2-phenylacetamido]-2-tert -butylamino-2-oxoethyl}-1H-pyrrol-1-yl)acetate 査読有り

Tetsuji Moriguchi, Venkataprasad Jalli, Suvratha Krishnamurthy, AkihikoTsuge, Kenji Yoza

Acta Crystallographica Section E E71 o1049 - o1050 2015年12月

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