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Design, Synthesis, Crystal Structure and Photoluminescence Properties of Four New Europium (III) Complexes with Fluorinated β-Diketone Ligand

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Crystal Structure Theory and Applications 2021年第1期10卷 1-13页

作者： tetsuji moriguchi Hiromasa Kawata Venkataprasad Jalli Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology Kitakyushu Japan Sankar Foundation Research and Development Division Visakhapatnam India

The strong photoluminescence properties of europium complexes with organic ligands attracted the attention of many researchers and found a wide range of uses in medical, industrial and biological fields. In this article, four new Tetrakis europium complexes 3a, 3b, 3c and 3d have been prepared using 1-phenyl-4,4,4-trifluoro-1,3-butenedionato ligand and pyridinium, bipyridinium, piperazinium and piperidinium counter cations. These complexes have been characterized by negative FAB-mass. The crystal structures of 3a, 3b, 3c and 3d were determined by single crystal X-ray diffraction analysis. The complex 3a crystallized in monoclinic form, space group P21/n with four molecules in the unit cell. The complex 3b crystallized in monoclinic form, space group P2/n with two complex molecules in the unit cell. The complex 3c crystallized in monoclinic form, space group C2/c with sixteen molecules in the unit cell. The complex 3d crystallized in monoclinic form, space group P21/n with four complex molecules in the unit cell. The complex 3a has 1,2-alternative structure, 3b has 1,3-alternative structure, 3c has cone like structure and 3d has partial cone like structure. The photoluminescence properties of these complexes have been evaluated. Strong red emissions were observed in all four complexes due to 5D0 → 7F2 transition of Europium (III) ions under UV excitation. Four β-diketone ligands acted as strong antenna ligands and transferred the absorbed energy to europium (III) ion effectively;consequently strong red luminescence was observed.

关键词： Tetrakis Europium Complexes Luminescence Fluorinate β-Diketone Ligand Pyridine Bipyridine Piperazine Bipiperidine

Three New -CF3, -CN Containing <i>π</i>-Conjugated Heteroaromatic Compounds: Synthesis, Crystal Structure and Photoelectronic Properties

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Crystal Structure Theory and Applications 2018年第3期7卷 33-45页

作者： tetsuji moriguchi Daisuke Yakeya Venkataprasad Jalli Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology Kitakyushu Japan Research and Development Division Sankar Foundation Visakhapatnam India

Three new π-conjugated hetero aromatic materials consisting of pyridine 3a, furan 3b, and thiophene 3c have been synthesized by Knoevenagel condensation reaction. These molecules have been characterized by 1H NMR, EI-MS and single crystal X-ray diffraction analysis. Molecule 3a crystallized under monoclinic system with space group C2/c, molecule 3b crystallized under triclinic system with space group P-1 and the molecule 3c crystalized under triclinic system with space group P-1. The optoelectronic properties of these compounds have been *** 3a, 3b and 3c showed strong absorption maxima wavelengths at 300, 419 and 418 nm, respectively. The molar extinction coefficients (ε) of the compounds 3a, 3b and 3c suggested that molecule 3b has better ability to absorb UV light;molecule 3a has better fluorescence intensity than molecule 3b and 3c. Low energy gaps of HOMO and LUMO energy levels of these compounds suggests that these compounds may be a promising new class of lead compounds for developing high performance semiconductor materials. Compounds 3a, 3b and 3c has emissions near to blue light, a slight modification of the structures by extending conjugation may find important applications in optoelectronic devices as blue light emitters in organic light-emitting devices for the development of new generation organic semiconducting materials.

关键词： Organic Semiconducting Material Knoevenagel Condensation X-Ray Analysis π-Conjugated Materials

Synthesis and Molecular Structures of Two Novel π-Conjugation Extended Dithia[3.3]metacyclophanes

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Crystal Structure Theory and Applications 2017年第1期6卷 1-10页

作者： tetsuji moriguchi Daisuke Yakeya Venkataprasad Jalli Akihiko Tsuge Kenji Yoza Department of Applied Chemistry Faculty of Engineering Kyushu Institute of Technology Kitakyushu Japan Bruker AXS Yokohama Japan

Two novel dithia[3.3]metacyclophanes substituted with ethynyl groups were synthesized as small-sized metacyclophanes from the corresponding brominated dithia-metacyclophanes via C-C bond formation reaction. These compounds were characterized by using 1H NMR, mass spectrometry and elemental analyses. The exact structures were determined by using X-ray diffraction analyses. X-ray diffraction analysis results revealed that these compounds have anti conformations because of existence of intermolecular π-π interaction and some short contacts in the crystal. The long wavelength fluorescence was observed for one of the compound having a pyrene moiety in solid state because of the existence of the intermolecular π-π interaction between two pyrene units.

关键词： Cyclophane X-Ray Analysis Suzuki Coupling π-Conjugation

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

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

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

A Review of Non-operative Treatments for Hepatocellular Carcinoma with Advanced Portal Vein Tumor Thrombus

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Journal of Clinical and Translational Hepatology 2017年第2期5卷 177-183页

作者： Michihisa moriguchi Mitsuhiro Furuta Yoshito Itoh Department of Molecular Gastroenterology and Hepatology Kyoto Prefectural University of Medicine Graduate School of Medical Science Kyoto Japan

Portal vein tumor thrombus (PVTT) frequently occurs with the progression of hepatocellular carcinoma (HCC) and is an important factor in determining the prognosis of *** many cases of HCC with advanced PVTT,treatment is difficult because the tumor has considerable extension into the liver,and portal hypertension is a frequent *** standard therapy for unresectable HCC with advanced PVTT is sorafenib therapy in patients with good hepatic ***,the outcomes of sorafenib therapy are not completely satisfactory,making the development of another therapy an urgent ***,this review aims to summarize non-operative treatments for HCC with advanced PVTT and discuss future perspectives based on those therapies,including therapies still being developed.

关键词： Keywords Hepatocellular carcinoma Medical therapy management Portal vein Thrombus

The optimized interface engineering of VS_2 as cathodes for high performance all-solid-state lithium-ion battery

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Science China(Technological Sciences) 2022年第8期65卷 1859-1866页

作者： WANG JianBiao OKABE Jugo KOMINE Yuki NOTOHARA Hiroo URITA Koki moriguchi Isamu WEI MingDeng Fujian Key Laboratory of Electrochemical Energy Storage Materials Fuzhou UniversityFuzhou 350108China Graduate School of Engineering Nagasaki UniversityNagasaki 852-8521Japan Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou UniversityChangzhou 213164China Institute of Materials Research and Engineering Agency for ScienceTechnology and Research(A*STAR)Innovis 138634Singapore

Vanadium sulfide was first employed as a cathode for all-solid-state lithium-ion batteries and demonstrated superior compatibility with the solid electrolyte, in which the interface between the electrode and solid electrolyte has been optimized. Consequently, it can exhibit excellent electrochemical performance in the voltage range of 1.5–3.5 V. Moreover, the ex-situ X-ray photoelectron spectroscopy measurements reveal the incomplete conversion mechanism to account for the superior electrochemical performance. Specifically, the electrode of VS_(2) exhibits a large capacity of 268.1 mA h g^(-1) at 50 mA g^(-1)(rate performance). At a current density of 100 mA g^(-1), a large reversible capacity of 215 mA h g^(-1) can be maintained after 100 cycles,indicating extraordinary cycling stability, making it a promising electrode for high energy density all-solid-state lithium-ion batteries.

关键词： VS_2 cathode interface all-solid-state battery electrochemical properties

Bud endodormancy in deciduous fruit trees:advances and prospects

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Horticulture Research 2021年第1期8卷 1657-1667页

作者： Qinsong Yang Yuhao Gao Xinyue Wu Takaya moriguchi Songling Bai Yuanwen Teng College of Agriculture and Biotechnology Zhejiang UniversityHangzhouZhejiang 310058China Key Laboratory for Silviculture and Conservation Ministry of EducationBeijing Forestry UniversityHaidian DistrictBeijing 100083China Shizuoka Professional University of Agriculture IwataShizuoka 438-0803Japan Hainan Institute of Zhejiang University SanyaHainan 572000China

Bud endodormancy is a complex physiological process that is indispensable for the survival,growth,and development of deciduous perennial *** timely release of endodormancy is essential for flowering and fruit production of deciduous fruit trees.A better understanding of the mechanism of endodormancy will be of great help in the artificial regulation of endodormancy to cope with climate change and in creating new cultivars with different chilling *** in poplar have clarified the mechanism of vegetative bud endodormancy,but the endodormancy of floral buds in fruit trees needs further *** this review,we focus on the molecular regulation of endodormancy induction,maintenance and release in floral buds of deciduous fruit *** also describe recent advances in quantitative trait loci analysis of chilling requirements in fruit *** discuss phytohormones,epigenetic regulation,and the detailed molecular network controlling endodormancy,centered on SHORT VEGETATIVE PHASE(SVP)and Dormancy-associated MADS-box(DAM)genes during endodormancy maintenance and *** previous studies and our observations,we propose a regulatory model for bud endodormancy and offer some perspectives for the future.

关键词： release advances clarified