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Syntheses, Characterization and DFT Analysis of Two Novel Thiaheterohelicene Derivatives

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Crystal Structure Theory and Applications 2016年第4期5卷 63-73页

作者： Tetsuji Moriguchi Keiichi Mitsumoto Yuki Nishizawa Daisuke Yakeya Venkataprasad Jalli akihiko tsuge Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology Kitakyushu Japan

Two novel thiaheterohelicene derivatives were synthesized from the corresponding 2,2'-(2,6-naphthalenediyl-di-2,1-ethenediyl) bis-thiophene and its dimethyl substituted analogue 2,2'-(2,6-naphthalenediyldi-2,1-ethenediyl) bis-2’’-methylthiophene using oxidative photo cyclization reaction. The compounds were characterized by 1H NMR, electron impact-mass spectrometry, elemental analyses, and the absolute molecular structures were determined by single crystal X-ray diffraction analysis. They crystallized under monoclinic system with space group P21/n for the unsubstituted compound and P21/c for the methyl substituted compound, respectively. The dihedral angle between the terminal thiophene ring and the molecular center was observed to be 20.82? for the unsubstituted compound and 14.27? for the methyl substituted compound, respectively. Furthermore, molecules oriented as herringbone structures by intermolecular π-π stacking in the crystals. The relative study of the actual arrangement of these molecules has been carried out using X-ray diffraction analysis. The two molecules have different crystal packing. The molecule 3b has herring bone like arrangement due to the substituent bulkiness and weak CH-π interaction. On the other hand, the molecular packing of molecule 3a is not herringbone probably due to the multiple weak intermolecular CH-S short contacts between columns consisting of stacked molecules.

关键词： Crystal Structure Thiaheterohelicene Derivative Strained Structure Single Crystal X-Ray Study

Synthesis and Crystal Structure Determination of 4’,9’,4”,9”-Tetra-t-Butyl- 1’,6’,1”,6”-Tetramethoxy-2,5-Dithia[3.3] Metabiphenylophane

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Crystal Structure Theory and Applications 2016年第3期5卷 56-62页

作者： Tetsuji Moriguchi Tatsuya Egami Daisuke Yakeya Venkataprasad Jalli Kenji Yoza akihiko tsuge Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology Kitakyushu Japan Japan Bruker AXS K.K.3-9 Yokohama Japan

The title compound 4’,9’,4”,9”-tetra-tert-butyl-1’,6’,1”,6”-tetramethoxy-2,5-dithia[3.3] metabiphenylophane was synthesized as a calixarene like large-sized metacyclophane from the corresponding 3,3’-bis(chloromethyl)-5,5’-bis(1,1-dimethylethyl)-2,2’-dimethoxy-1,1’-biphenyl and 3,3’-bis (mercaptomethyl)-5,5’-bis(1,1-dimethylethyl)-2,2’-dimethoxy-1,1’-biphenyl via an intermolecular condensation reaction. The compound was characterized using 1H NMR spectroscopy and mass spectrometry. Its exact conformational structure was determined via single crystal X-ray diffraction analysis. The compound has quite strained 1,2-alternate like structure because of its two high dihedral angled and rigid biphenyl parts in the crystal. The crystal includes the two isomers as two different 1,2-alternate like conformers, and the ratio of the two isomers is 78:22.

关键词： Crystal Structure Metabiphenylcyclophane 1 2-Alternate Conformers

Syntheses, Crystal Structure and Photoluminescence Properties of Piperidinium Tetrakis (1,3-Diphenyl-1,3-Propanedionato) Europate(III) Complex and Its Two Different Crystals

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Crystal Structure Theory and Applications 2017年第4期6卷 57-66页

作者： Tetsuji Moriguchi Naoya Kitou Daisuke Yakeya akihiko tsuge Kenji Yoza Venkataprasad Jalli Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology Kitakyushu Japan Japan Bruker AXS K.K. Yokohama Japan Sankar Foundation Research and Development Division Visakhapatnam India

Treatment of 1,3-diphenyl-1,3-propanedione 1a with europium (III) chloride in the presence of piperidine results in the halide ligands exchange giving newly piperidinium tetrakis (1,3-diphenyl-1,3-propanedionato)europate(III) complex 2a. The complex was characterized by 1H-NMR, positive FAB-mass, and Elemental Analysis. The exact molecular structure of 2a was determined by single crystal X-ray diffraction with the monoclinic space group Cc (centrosymmetric, No.13). The large cavity sizes of the complex 2a facilitated the inclusion of water and benzene solvate molecules. The other two different crystals 2b, 2c having two water molecules and one benzene moleculewere obtained by the crystallization in different solvents and the exact molecular structures were determined by single crystal X-ray diffraction analysis with space groups P21/n (centrosymmetric, No.14), and P21/n (centrosymmetric, No.14), respectively. The eight coordinate structures of the complexes in the three crystals were slightly different due to the crystal packing and the existence of the solvent molecule(s). The photoluminescence studies indicated that four β-diketone ligands acted as strong antenna ligands and transferred the absorbed energy to europium (III) ion, consequently red luminescence was observed. These strong emissions wereattributed to the 5D0 → 7F2 transition of Europium (III) ions under UV excitation. The photoluminescence spectrum of the three crystals was almost same in solid as well as in solution.

关键词： Tetrakis Europium Complexes Luminescence β-Diketone Ligands

Visible light responsive photocatalysts developed by substitution with metal cations aiming at artificial photosynthesis

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Frontiers in Energy 2021年第3期15卷 568-576页

作者： Yuichi YAMAGUCHI akihiko KUDO Department of Applied Chemistry Faculty of ScienceTokyo University of ScienceTokyo 162-8601Japan

To solve resource,energy,and environmental issues,development of sustainable clean energy system is strongly *** recent years,hydrogen has been paid much attention to as a clean *** hydrogen production by water splitting using a photocatalyst as artificial photosynthesis is a promising method to solve these *** utilization of visible light comprised of solar light is essential for practical *** strategies,i.e.,doping,control of valence band,and formation of solid solution are often utilized as the useful methods to develop visible light responsive *** minireview introduces the recent work on visible-light-driven photocatalysts developed by substitution with metal cations of those strategies.

关键词： visible light responsive photocatalyst water splitting artificial photosynthesis:metal ion substitution

Remarks on Herz-Type Hardy Spaces Dedicated to Professor Kozo Yabuta on the occasion of his 60th birthday

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Acta Mathematica Sinica,English Series 2001年第2期17卷 339-360页

作者： akihiko MIYACHI Department of Mathematics Tokyo Woman's Christian University. 2-6-1 Zempukuji. Suginami-ku. Tokyo 167-8585. JAPAN

Basic properties of the Herz-type Hardy spaces HKqa,p, such as the boundedness of singular integral operators and the fractional integration operators, atomic decomposition, dense subspaces, etc., are established in t... 详细信息

关键词： Herz-type Hardy space Singular integral Flactional integration Multilinear operator.

More Peripheral Visualization of Hepatic Arteries by Using Respiratory-Triggered 3D True Steady-State Free-Precession Projection Magnetic Resonance Angiographic Sequences with Time-Spatial Labeling Inversion Pulse

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Open Journal of Radiology 2014年第4期4卷 314-321页

作者： Daisuke tsuge Ryohei Kuwatsuru Tatsuro Inoue Yuki Yamashiro Kazuhiro Suzuki akihiko Shiraishi Department of Radiology Faculty of Medicine Juntendo University Tokyo Japan

Purpose: To evaluate respiratory-triggered three-dimensional (3D) true steady-state free-precession (SSFP) projection magnetic resonance angiographic sequences with time-spatial labeling inversion pulse (Time-SLIP) for visualizing the hepatic arteries and to optimize the image acquisition protocol. Materials and Methods: A 1.5-T clinical magnetic resonance imager was used to perform abdominal magnetic resonance angiography (MRA) in 25 consecutive patients before transcatheter arterial chemoembolization or surgery. We compared two selective space-labeling inversion pulse (tag pulse) patterns (Patterns I and II, oblique and parallel tag pulses, respectively). Two experienced radiologists evaluated the number of hepatic arterial branches visible on the acquired MRA images, and the results were referenced with those on images from intra-arterial digital subtraction angiography. Results: Images were acquired from all patients. The two radiologists clearly visualized branches of the left and right hepatic arteries. More peripheral hepatic arterial branches were identified in MRA images captured by using tag pulse Pattern I than in those acquired by using Pattern II (P P > 0.05). Conclusion: Non-contrast-enhanced Time-SLIP hepatic MRA with true SSFP allowed selective visualization of peripheral hepatic vessels.

关键词： Hepatic Artery Non-Contrast Magnetic Resonance Angiography Time-Spatial Labeling Inversion Pulse True SSFP Angiography

Simeprevir with peginterferon and ribavirin induced interstitial pneumonitis:First case report

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World Journal of Gastroenterology 2015年第3期21卷 1009-1013页

作者： Katsuyoshi Tamaki akihiko Okubo Department of Hepatology Tourai-kai Okubo HospitalTokushima 770-0923Japan Department of Respirology Tourai-kai Okubo HospitalTokushima 770-0923Japan

The effectiveness of hepatitis C treatment has improved with the development of interferon(IFN),and it has drastically improved with the development of peg-interferon-α(PEG-IFN) in combination with ribavirin(RBV) and,more recently,with the addition of a protease ***,which is a secondgeneration protease inhibitor,has shown clinically favorable safety and tolerability *** received its first global approval in Japan in September 2013 for the treatment of genotype 1 chronic hepatitis C in combination with PEG-IFN and *** serious adverse event associated with IFN therapy is interstitialpneumonitis,which can be *** experienced a patient with interstitial pneumonitis that was induced by simeprevir with PEG-IFN and RBV therapy for chronic hepatitis C in the early stages of therapy(8 wk after initiating therapy).This is the first case report of interstitial pneumonitis with simeprevir with PEG-IFN and RBV in the *** addition,it is very interesting that the onset of interstitial pneumonitis was earlier than that in conventional PEG-IFN and RBV *** finding suggests that simeprevir augments the adverse *** present this case report in light of relevant literature on interstitial pneumonitis with conventional PEG-IFN and RBV therapy.

关键词： Simeprevir Chronic hepatitis C Interstitial pneumo

Households' Risk Perception and Behavioral Responses to Natech Accidents

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International Journal of Disaster Risk Science 2017年第1期8卷 1-15页

作者： Junlei Yu Ana Maria Cruz akihiko Hokugo School of Humanities and Social Science Nanyang Technological University Disaster Prevention Research Institute Kyoto University Research Center for Urban Safety and Security Kobe University

This study analyzes data on households' risk perception and protective behavior following a natural disaster triggered technological accident(Natech accident)that occurred at an industrial park in Sendai during the Great East Japan Earthquake and Tsunami, on 11 March2011. The results indicate that some households carried out multiple evacuations and that households' risk perceptions changed throughout the Natech accident evacuation process. Risk perception differed according to household location and demographic characteristics. We also found differences in the protective measures adopted for households in different locations. Specifically, those living closer to the Natech accident tended to evacuate immediately,whereas those living further away tended to shelter in place. Wind direction is discussed as a factor that influences households' risk perception and evacuation response to a Natech accident. The findings of this study advance knowledge of household behavior in response to a Natech accident and can assist emergency managers in developing strategies for better management of evacuation processes.

关键词： Evacuation behavior Great East Japan Earthquake and Tsunami Natech accidents Protective actions Risk perception

Carcinogenesis and chemoprevention of biliary tract cancer in pancreaticobiliary maljunction

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World Journal of Gastrointestinal Oncology 2010年第3期2卷 130-135页

作者： akihiko Tsuchida Takao Itoi the third Department of Surgery Tokyo Medical University the fourth Department of Internal Medicine Tokyo Medical University

Pancreaticobiliary maljunction (PBM) is a high risk factor for biliary tract cancer. In PBM, since the pancreatic duct and bile duct converge outside the duodenal wall beyond the influence of the sphincter of Oddi, pancreatic juice and bile are constantly mixed, producing a variety of harmful substances. Because of this, the biliary mucosa is repeatedly damaged and repaired, which causes an acceleration of cell proliferative activity and multiple gene mutations. Histological changes such as hyperplasia, metaplasia, and dysplasia ultimately result in a high incidence of carcinogenesis. In a nationwide survey by the Japanese Study Group on PBM, coexisting biliary tract cancer was detected in 278 of the 1627 registered cases of PBM (17.1%). Of these cases, in those with dilatation of the extrahepatic bile duct, cancer was often detected not only in the gallbladder but also in the bile ducts. More than 90% of cancer cases without dilatation of the extrahepatic bile duct develop in the gallbladder. Standard treatment for PBM is a cholecystectomy and resection of the extrahepatic bile duct. However, cholecystectomy alone is performed at nearly half of institutions in Japan. Conversely, reports of carcinogenesis in the remnant bile duct or pancreas after diversion surgery are steadily increasing. One of the causes for this is believed to be an accumulation of gene mutations which were present before surgery. Anticancer drugs are ineffective in preventing such carcinogenesis following surgery, thus the postoperative administration of chemopreventive agents may be necessary.

关键词： Chemoprevention Gallbladder cancer Bile duct cancer Carcinogenesis Pancreaticobiliary maljunction