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Tauchi D, Kanno K, Hasegawa M, Mazaki Y, Tsubaki K, Sugiura KI, Shiga T, Mori S, Nishikawa H. Aggregation-induced enhanced fluorescence emission of chiral Zn(II) complexes coordinated by Schiff-base type binaphthyl ligands. Dalton Trans 2024. [PMID: 38687172 DOI: 10.1039/d4dt00903g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
A pair of novel chiral Zn(II) complexes coordinated by Schiff-base type ligands derived from BINOL (1,1'-bi-2-naphthol), R-/S-Zn, were synthesized. X-ray crystallography revealed the presence of two crystallographically independent complexes; one has a distorted trigonal-bipyramidal structure coordinated by two binaphthyl ligands and one disordered methanol molecule (molecule A), while the other has a distorted tetrahedral structure coordinated by two binaphthyl ligands (molecule B). Numerous CH⋯π and CH⋯O interactions were identified, contributing to the formation of a 3-dimensional rigid network structure. Both R-/S-Zn exhibited fluorescence in both CH2Cl2 solutions and powder samples, with the photoluminescence quantum yields (PLQYs) of powder samples being twice as large as those in solutions, indicating aggregation-induced enhanced emission (AIEE). The AIEE properties were attributed to the restraint of the molecular motion arising from the 3-dimensional intermolecular interactions. CD and CPL spectra were observed for R-/S-Zn in both solutions and powders. The dissymmetry factors, gabs and gCPL values, were within the order of 10-3 to 10-4 magnitudes, comparable to those reported for chiral Zn(II) complexes in previous studies.
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Affiliation(s)
- Daiki Tauchi
- Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan.
| | - Katsuya Kanno
- Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan.
| | - Masashi Hasegawa
- Graduate School of Science, Kitasato University, Kanagawa 252-0373, Japan
| | - Yasuhiro Mazaki
- Graduate School of Science, Kitasato University, Kanagawa 252-0373, Japan
| | - Kazunori Tsubaki
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto 606-8522, Japan
| | - Ken-Ichi Sugiura
- Graduate School of Science, Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Takuya Shiga
- Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba 305-8577, Japan
| | - Seiji Mori
- Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan.
| | - Hiroyuki Nishikawa
- Graduate School of Science and Engineering, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan.
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Watanabe K, Tsurumaki E, Hasegawa M, Toyota S. Structure and Chiroptical Properties of Anthra[1,2-a]anthracene-1-yl Dimers as New Biaryls. Chemistry 2024:e202400929. [PMID: 38554080 DOI: 10.1002/chem.202400929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 03/23/2024] [Accepted: 03/30/2024] [Indexed: 04/01/2024]
Abstract
Dimers of anthra[1,2-a]anthracene-1-yl units and its mesityl derivative were synthesized by Ni(0)-mediated coupling of the corresponding chloro derivatives as new biaryls. The X-ray analysis and DFT calculations revealed that two polycyclic aromatic units with nonplanar deformations took a twisted conformation about the single bond as a chiral axis. Enantiomers of the nonsubstituted compound were resolved by chiral HPLC, and the enantiopure samples showed intense Cotton effects at 321 nm in the circular dichroism (CD) spectra and emission bands at 449 nm in the circularly polarized luminescence (CPL) spectra with dissymmetry factor of |glum| 3.6×10-3. The absolute stereochemistry of this biaryl was determined by the theoretical calculation of CD spectrum by the time-dependent DFT method. The barrier to enantiomerization was determined to be 108 kJ mol-1 at 298 K. The dynamic process proceeded via a stepwise mechanism involving the helical inversion of each aromatic unit and the rotation about the biaryl axis as analyzed by the DFT calculations.
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Affiliation(s)
- Kota Watanabe
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Eiji Tsurumaki
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Masashi Hasegawa
- Department of Chemistry, School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Shinji Toyota
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8551, Japan
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Sakai K, Fuke H, Yoshimura K, Sasaki M, Abe K, Haino S, Hams T, Hasegawa M, Kim KC, Lee MH, Makida Y, Mitchell JW, Nishimura J, Nozaki M, Orito R, Ormes JF, Seo ES, Streitmatter RE, Thakur N, Yamamoto A, Yoshida T. Search for Antideuterons of Cosmic Origin Using the BESS-Polar II Magnetic-Rigidity Spectrometer. Phys Rev Lett 2024; 132:131001. [PMID: 38613296 DOI: 10.1103/physrevlett.132.131001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 10/21/2023] [Accepted: 01/10/2024] [Indexed: 04/14/2024]
Abstract
We searched for antideuterons (d[over ¯]'s) in the 4.7×10^{9} cosmic-ray events observed during the BESS-Polar II flight at solar minimum in 2007-2008 but found no candidates. The resulting 95% C.L. upper limit on the d[over ¯] flux is 6.7×10^{-5} (m^{2} s sr GeV/n)^{-1} in an energy range from 0.163 to 1.100 GeV/n. The result has improved by more than a factor of 14 from the upper limit of BESS97, which had a potential comparable to that of BESS-Polar II in the search for cosmic-origin d[over ¯]'s and was conducted during the former solar minimum. The upper limit of d[over ¯] flux from BESS-Polar II is the first result achieving the sensitivity to constrain the latest theoretical predictions.
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Affiliation(s)
- K Sakai
- NASA-Goddard Space Flight Center (NASA-GSFC), Greenbelt, Maryland 20771, USA
- Center for Research and Exploration in Space Science and Technology (CRESST)
| | - H Fuke
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - K Yoshimura
- Okayama University, Okayama, Okayama 700-8530, Japan
| | - M Sasaki
- NASA-Goddard Space Flight Center (NASA-GSFC), Greenbelt, Maryland 20771, USA
- Center for Research and Exploration in Space Science and Technology (CRESST)
| | - K Abe
- Kobe University, Kobe, Hyogo 657-8501, Japan
| | - S Haino
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - T Hams
- NASA-Goddard Space Flight Center (NASA-GSFC), Greenbelt, Maryland 20771, USA
- Center for Research and Exploration in Space Science and Technology (CRESST)
| | - M Hasegawa
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - K C Kim
- IPST, University of Maryland, College Park, Maryland 20742, USA
| | - M H Lee
- IPST, University of Maryland, College Park, Maryland 20742, USA
| | - Y Makida
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - J W Mitchell
- NASA-Goddard Space Flight Center (NASA-GSFC), Greenbelt, Maryland 20771, USA
| | - J Nishimura
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan
- The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
| | - M Nozaki
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - R Orito
- Kobe University, Kobe, Hyogo 657-8501, Japan
| | - J F Ormes
- University of Denver, Denver, Colorado 80208, USA
| | - E S Seo
- IPST, University of Maryland, College Park, Maryland 20742, USA
| | - R E Streitmatter
- NASA-Goddard Space Flight Center (NASA-GSFC), Greenbelt, Maryland 20771, USA
| | - N Thakur
- NASA-Goddard Space Flight Center (NASA-GSFC), Greenbelt, Maryland 20771, USA
| | - A Yamamoto
- High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - T Yoshida
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan
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Asano S, Niwa K, Lawler KV, Kawaguchi-Imada S, Sasaki T, Hasegawa M. High-Pressure Synthesis of a High-Pressure Phase of MnN Having NiAs-Type Structure. Inorg Chem 2023. [PMID: 37993285 DOI: 10.1021/acs.inorgchem.3c03241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
A novel high-pressure phase of manganese mononitride, NiAs-type MnN, was successfully synthesized through a pressure-induced phase transition from a tetragonal distorted NaCl-type MnN at pressures above approximately 55 GPa. High-pressure experiments, including starting material preparation, were conducted using a laser-heated diamond anvil cell. This result is the first example of a nitride with a structural phase transition from the distorted NaCl-type to the NiAs-type structure. Upon decompression after the phase transition to NiAs-type structure, the NiAs-type MnN underwent a structural change to the distorted NaCl-type phase, indicating the phase transition was reversible. NiAs-type MnN has a higher density and bulk modulus in comparison to the distorted NaCl-type one. The phase transition pressure of MnN is lower than that of oxides, such as FeO and MnO, which show a structural phase transition from a NaCl-type to a NiAs-type structure. It is suggested that this is due to the lattice distortion caused by antiferromagnetic ordering.
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Affiliation(s)
- Shuto Asano
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Ken Niwa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
- Research Center for Crystalline Materials Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Keith V Lawler
- Nevada Extreme Conditions Laboratory, University of Nevada Las Vegas, Las Vegas, Nevada 89154, United States
| | | | - Takuya Sasaki
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Masashi Hasegawa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
- Research Center for Crystalline Materials Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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5
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Hasegawa M, Tanifuji T, Okazaki S, Otsuka I, Shirai T, Shindo R, Horai T, Mouri K, Takahashi M, Kondo T, Ueno Y, Hishimoto A. Association of two variable number of tandem repeats in the monoamine oxidase A gene promoter with suicide completion: The present study and meta-analysis. Neuropsychopharmacol Rep 2023; 43:338-345. [PMID: 37202909 PMCID: PMC10496037 DOI: 10.1002/npr2.12344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/14/2023] [Accepted: 04/26/2023] [Indexed: 05/20/2023] Open
Abstract
BACKGROUND One potential cause of suicide is serotonergic dysfunction. Sex differences have been reported to modulate the effects of serotonergic polymorphisms. Monoamine oxidase A (MAOA) is an enzyme that degrades serotonin and is located on the X chromosome. A previous study indicated that the upstream (u) variable number of tandem repeat (VNTR) in the MAOA gene promoter may be associated with suicide. However, a meta-analysis showed that this polymorphism may not be related to suicide. According to a recent study, compared with the uVNTR, the distal (d)VNTR and the haplotypes of the two VNTRs modulate MAOA expression. METHODS We examined the two VNTRs in the MAOA gene promoter in 1007 subjects who committed suicide and 844 healthy controls. We analyzed the two VNTRs using fluorescence-based polymerase chain reaction assays. We conducted a meta-analysis for the two VNTRs to update it. RESULTS Our results demonstrated that neither the genotype-based associations nor allele/haplotype frequencies of the two VNTRs were significantly associated with suicide. In the meta-analysis, we did not indicate relationships between uVNTR and suicide nor did we identify articles analyzing dVNTR in suicide. CONCLUSION Overall, we did not find a relationship between the two VNTRs in the MAOA promoter and suicide completion; thus, warranting further studies are required.
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Affiliation(s)
- Masashi Hasegawa
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Takaki Tanifuji
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Satoshi Okazaki
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Ikuo Otsuka
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Toshiyuki Shirai
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Ryota Shindo
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Tadasu Horai
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Kentaro Mouri
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
| | - Motonori Takahashi
- Division of Legal Medicine, Department of Community Medicine and Social Health ScienceKobe University Graduate School of MedicineKobeJapan
| | - Takeshi Kondo
- Division of Legal Medicine, Department of Community Medicine and Social Health ScienceKobe University Graduate School of MedicineKobeJapan
| | - Yasuhiro Ueno
- Division of Legal Medicine, Department of Community Medicine and Social Health ScienceKobe University Graduate School of MedicineKobeJapan
| | - Akitoyo Hishimoto
- Department of PsychiatryKobe University Graduate School of MedicineKobeJapan
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6
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Fujino T, Takakura S, Chinone Y, Hasegawa M, Hazumi M, Katayama N, Lee AT, Matsumura T, Minami Y, Nishino H. Characterization of a half-wave plate for cosmic microwave background circular polarization measurement with POLARBEAR. Rev Sci Instrum 2023; 94:064502. [PMID: 37862532 DOI: 10.1063/5.0140088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 06/03/2023] [Indexed: 10/22/2023]
Abstract
A half-wave plate (HWP) is often used as a modulator to suppress systematic error in the measurements of cosmic microwave background (CMB) polarization. A HWP can also be used to measure circular polarization (CP) through its optical leakage from CP to linear polarization. The CP of the CMB is predicted from various sources, such as interactions in the Universe and extension of the standard model. Interaction with supernova remnants of population III stars is one of the brightest CP sources. Thus, the observation of the CP of CMB is a new tool for searching for population III stars. In this paper, we demonstrate the improved measurement of the leakage coefficient using the transmission measurement of an actual HWP in the laboratory. We measured the transmittance of linearly polarized light through the HWP used in Polarbear in the frequency range of 120-160 GHz. We evaluate the properties of the HWP by fitting the data with a physical model using the Markov Chain Monte Carlo method. We then estimate the band-averaged CP leakage coefficient using the physical model. We find that the leakage coefficient strongly depends on the spectra of CP sources. We thus calculate the maximum fractional leakage coefficient from CP to linear polarization as 0.133 ± 0.009 in the Rayleigh-Jeans spectrum. The nonzero value shows that Polarbear has a sensitivity to CP. Additionally, because we use the bandpass of detectors installed in the telescope to calculate the band-averaged values, we also consider systematic effects in the experiment.
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Affiliation(s)
- T Fujino
- Graduate School of Engineering Science, Yokohama National University, Yokohama 240-8501, Japan
| | - S Takakura
- Department of Astrophysical and Planetary Sciences, University of Colorado Boulder, Boulder, Colorado 80309, USA
| | - Y Chinone
- International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles (QUP), High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - M Hasegawa
- International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles (QUP), High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- The Graduate University for Advanced Studies (SOKENDAI), Miura District, Kanagawa, Hayama 240-0115, Japan
| | - M Hazumi
- International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles (QUP), High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
- Institute of Particle and Nuclear Studies (IPNS), High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- The Graduate University for Advanced Studies (SOKENDAI), Miura District, Kanagawa, Hayama 240-0115, Japan
- Japan Aerospace Exploration Agency (JAXA), Institute of Space and Astronautical Science (ISAS), Sagamihara, Kanagawa 252-5210, Japan
| | - N Katayama
- Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - A T Lee
- International Center for Quantum-field Measurement Systems for Studies of the Universe and Particles (QUP), High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
- Department of Physics, University of California, Berkeley, California 94720, USA
- Physics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - T Matsumura
- Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), UTIAS, The University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - Y Minami
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - H Nishino
- Research Center for the Early Universe, School of Science, The University of Tokyo, Tokyo 113-0033, Japan
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7
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Kobayashi T, Ishiwari F, Fukushima T, Nojima Y, Hasegawa M, Mazaki Y, Hanaya K, Sugai T, Higashibayashi S. Inversion of diaza[5]helicenes through an N-N bond breaking pathway. Chemistry 2023:e202301466. [PMID: 37194616 DOI: 10.1002/chem.202301466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 05/18/2023]
Abstract
1,1',10,10'-Biphenothiazine and its S,S,S',S'-tetroxide are diaza[5]helicenes with N-N linkages. Kinetic experiments on racemization together with DFT calculations revealed that they undergo inversion through the N-N bond breaking pathway rather than the general conformational pathway. In these diaza[5]helicenes with this inversion mechanism, the reduction of electronic repulsion in the N-N bond by modification of S to SO2 at the outer position of the helix led to a significantly higher inversion barrier, 35.3 kcal/mol, compared to [5]helicene. 1,1',10,10'-Biphenothiazine S,S,S',S'-tetroxide was highly resistant to acid-mediated N-N bond breaking and racemization under acidic conditions.
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Affiliation(s)
| | - Fumitaka Ishiwari
- Tokyo Institute of Technology, Institute of Innovative Research, JAPAN
| | | | - Yuki Nojima
- Kitasato University, Graduate School of Science, JAPAN
| | | | | | | | | | - Shuhei Higashibayashi
- Keio University, Faculty of Pharmacy, 1-5-30 Shibakoen, Minato-ku, 105-8512, Tokyo, JAPAN
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8
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Yaginuma Y, Matsuura K, Yamada S, Yoshida T, Hasegawa M. Left ventricular outflow tract obstruction caused by a congenital accessory mitral valve leaflet and treated by open-heart surgery in a young dog. J Small Anim Pract 2023; 64:168-172. [PMID: 36284366 DOI: 10.1111/jsap.13571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 09/14/2022] [Accepted: 09/23/2022] [Indexed: 11/30/2022]
Abstract
A 3-month-old Shetland sheepdog presented with a loud ejection murmur and exercise intolerance. Echocardiography revealed an accessory mitral valve leaflet, characterised by a valve-like structure separate from the mitral valve seen in the subaortic region of the ventricular septum. The left ventricular outflow tract was partially obstructed with a pressure gradient of 12 mmHg. Accessory mitral valve leaflet resection and mitral valvuloplasty were performed during open-heart surgery. Histology performed on the membrane-like structures were indicative of fibrous connective tissues. Postoperative echocardiography confirmed removal of the valve-like structure with resolution of the left ventricular outflow tract obstruction. The pressure gradient was decreased to 4.6 mmHg. The dog was in good condition and no further treatment was required 5 months after surgery. Both cardiac troponin I and NT-proBNP were markedly decreased. In this dog, surgical resection combined with mitral valve plasty resolved the left ventricular outflow tract obstruction and the clinical signs.
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Affiliation(s)
- Y Yaginuma
- VCA Japan Shiraishi Animal Hospital, Saitama, Japan
| | - K Matsuura
- VCA Japan Shiraishi Animal Hospital, Saitama, Japan
| | - S Yamada
- VCA Japan Shiraishi Animal Hospital, Saitama, Japan
| | - T Yoshida
- VCA Japan Shiraishi Animal Hospital, Saitama, Japan
| | - M Hasegawa
- VCA Japan Shiraishi Animal Hospital, Saitama, Japan
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9
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Harada K, Hasegawa C, Matsumoto T, Sugishita H, Kitamura C, Higashibayashi S, Hasegawa M, Suzuki S, Kato SI. A double-helical S,C-bridged tetraphenyl- para-phenylenediamine and its persistent radical cation. Chem Commun (Camb) 2023; 59:1301-1304. [PMID: 36633220 DOI: 10.1039/d2cc06144a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A structurally constrained, double-helical S,C-bridged tetraphenyl-para-phenylenediamine (TPPD) has been synthesized. The stable radical cation of the S,C-bridged TPPD was generated by chemical oxidation, and the electron spin was found to be delocalized over the entire π-conjugated framework. The excellent conformational stability of the neutral molecule facilitated the separation of its enantiomers.
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Affiliation(s)
- Kaho Harada
- Department of Materials Science, School of Engineering, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga 522-8533, Japan.
| | - Chika Hasegawa
- Department of Chemistry, School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Taisuke Matsumoto
- Institute for Materials Chemistry and Engineering (IMCE), Kyushu University, 6-1 Kasuga-koh-en, Kasuga 816-8580, Japan
| | - Hiroki Sugishita
- Department of Materials Science, School of Engineering, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga 522-8533, Japan.
| | - Chitoshi Kitamura
- Department of Materials Science, School of Engineering, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga 522-8533, Japan.
| | - Shuhei Higashibayashi
- Faculty of Pharmacy, Keio University, 1-5-30, Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Masashi Hasegawa
- Department of Chemistry, School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Shuichi Suzuki
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 560-8531, Japan
| | - Shin-Ichiro Kato
- Department of Materials Science, School of Engineering, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga 522-8533, Japan.
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10
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Sasaki T, Yamamoto T, Asano S, Niwa K, Hasegawa M. High-pressure synthesis and crystal structures of molybdenum nitride Mo 3N 5 with anisotropic compressibility by a nitrogen dimer. Dalton Trans 2023; 52:469-475. [PMID: 36533452 DOI: 10.1039/d2dt03433f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel high-pressure molybdenum nitride phase, Mo3N5, was synthesized at above 45 GPa via a nitridation reaction of molybdenum with nitrogen under high pressure using a laser-heated diamond anvil cell. Mo3N5, having an N-N dimer and 7-coordinated Mo sites, crystallizes in an orthorhombic structure with a space group of Cmcm (No. 63) without other prototype structures. The refined lattice parameters for Mo3N5 were a = 2.86201(2) Å, b = 7.07401(6) Å, and c = 14.59687(13) Å. The DFT enthalpy calculation suggested that Mo3N5 is a high-pressure stable phase, which is also consistent with an increasing coordination number compared to ambient- and low-pressure phases. The zero-pressure bulk modulus of Mo3N5 was determined to be K0 = 328(4) GPa with K'0 = 10.1(6) by the fitting for the compression curve, which is almost consistent with the theoretical E-V curve and elastic stiffness constants. The compressibility of Mo3N5 has axial anisotropy corresponding to the N-N dimer direction in the crystal structure.
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Affiliation(s)
- Takuya Sasaki
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan.
| | - Takuro Yamamoto
- Department of Crystalline Materials Science, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Shuto Asano
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan.
| | - Ken Niwa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan.
| | - Masashi Hasegawa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan.
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Suzuki K, Fukuda H, Toda H, Imai Y, Nojima Y, Hasegawa M, Tsurumaki E, Toyota S. Substituent effects on helical structures and chiroptical properties of fused anthracenes with bulky phenyl groups. Tetrahedron 2023. [DOI: 10.1016/j.tet.2022.133243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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12
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Usui K, Narita N, Eto R, Suzuki S, Yokoo A, Yamamoto K, Igawa K, Iizuka N, Mimura Y, Umeno T, Matsumoto S, Hasegawa M, Tomooka K, Imai Y, Karasawa S. Oxidation of an Internal‐Edge‐Substituted [5]Helicene‐Derived Phosphine Synchronously Enhances Circularly Polarized Luminescence. Chemistry 2022; 28:e202202922. [DOI: 10.1002/chem.202202922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Indexed: 11/23/2022]
Affiliation(s)
- Kazuteru Usui
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
- Graduate School of Pharmaceutical Sciences Kyushu University Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Nozomi Narita
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
| | - Ryosuke Eto
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
| | - Seika Suzuki
- Department of Applied Chemistry, Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Atsushi Yokoo
- Graduate School of Pharmaceutical Sciences Kyushu University Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Kosuke Yamamoto
- Graduate School of Pharmaceutical Sciences Kyushu University Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Kazunobu Igawa
- Department of Chemistry, Faculty of Advanced Science and Technology Kumamoto University Kurokami 2–39-1 Kumamoto 860-8555 Japan
| | - Naoko Iizuka
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
| | - Yuki Mimura
- Department of Applied Chemistry, Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Tomohiro Umeno
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
| | - Shota Matsumoto
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
| | - Masashi Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering Kyushu University Kasuga Fukuoka 816-8580 Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Satoru Karasawa
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen, Machida Tokyo 194-8543 Japan
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Usui K, Narita N, Eto R, Suzuki S, Yokoo A, Yamamoto K, Igawa K, Iizuka N, Mimura Y, Umeno T, Matsumoto S, Hasegawa M, Tomooka K, Imai Y, Karasawa S. Oxidation of an Internal‐Edge‐Substituted [5]Helicene‐Derived Phosphine Synchronously Enhances Circularly Polarized Luminescence. Chemistry 2022; 28:e202203413. [DOI: 10.1002/chem.202203413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Kazuteru Usui
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Tokyo 194-8543 Japan
- Graduate School of Pharmaceutical Sciences Kyushu University Fukuoka 812-8582 Japan
| | - Nozomi Narita
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Tokyo 194-8543 Japan
| | - Ryosuke Eto
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Tokyo 194-8543 Japan
| | - Seika Suzuki
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Osaka 577-8502 Japan
| | - Atsushi Yokoo
- Graduate School of Pharmaceutical Sciences Kyushu University Fukuoka 812-8582 Japan
| | - Kosuke Yamamoto
- Graduate School of Pharmaceutical Sciences Kyushu University Fukuoka 812-8582 Japan
| | - Kazunobu Igawa
- Department of Chemistry Faculty of Advanced Science and Technology Kumamoto University Kurokami 2-39-1 Kumamoto 860-8555 Japan
| | - Naoko Iizuka
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Tokyo 194-8543 Japan
| | - Yuki Mimura
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Osaka 577-8502 Japan
| | - Tomohiro Umeno
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Tokyo 194-8543 Japan
| | - Shota Matsumoto
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Tokyo 194-8543 Japan
| | - Masashi Hasegawa
- Graduate School of Science Kitasato University Kanagawa 252-0373 Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering Kyushu University Fukuoka 816-8580 Japan
| | - Yoshitane Imai
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Osaka 577-8502 Japan
| | - Satoru Karasawa
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Tokyo 194-8543 Japan
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Usui K, Narita N, Eto R, Suzuki S, Yokoo A, Yamamoto K, Igawa K, Iizuka N, Mimura Y, Umeno T, Matsumoto S, Hasegawa M, Tomooka K, Imai Y, Karasawa S. Oxidation of an Internal‐Edge‐Substituted [5]Helicene‐Derived Phosphine Synchronously Enhances Circularly Polarized Luminescence. Chemistry 2022. [DOI: 10.1002/chem.202203411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kazuteru Usui
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen Machida Tokyo 194-8543 Japan
- Graduate School of Pharmaceutical Sciences Kyushu University Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Nozomi Narita
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen Machida Tokyo 194-8543 Japan
| | - Ryosuke Eto
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen Machida Tokyo 194-8543 Japan
| | - Seika Suzuki
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Atsushi Yokoo
- Graduate School of Pharmaceutical Sciences Kyushu University Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Kosuke Yamamoto
- Graduate School of Pharmaceutical Sciences Kyushu University Maidashi Higashi-ku Fukuoka 812-8582 Japan
| | - Kazunobu Igawa
- Department of Chemistry Faculty of Advanced Science and Technology Kumamoto University Kurokami 2-39-1 Kumamoto 860-8555 Japan
| | - Naoko Iizuka
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen Machida Tokyo 194-8543 Japan
| | - Yuki Mimura
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Tomohiro Umeno
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen Machida Tokyo 194-8543 Japan
| | - Shota Matsumoto
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen Machida Tokyo 194-8543 Japan
| | - Masashi Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Katsuhiko Tomooka
- Institute for Materials Chemistry and Engineering Kyushu University Kasuga Fukuoka 816-8580 Japan
| | - Yoshitane Imai
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Satoru Karasawa
- Faculty of Pharmaceutical Sciences Showa Pharmaceutical University Higashi-Tamagawagakuen Machida Tokyo 194-8543 Japan
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Ido T, Hasegawa M, Ikezoe R, Onchi T, Hanada K, Idei H, Kuroda K, Nagashima Y. Conceptual design of a heavy ion beam probe for the QUEST spherical tokamak. Rev Sci Instrum 2022; 93:113516. [PMID: 36461548 DOI: 10.1063/5.0101770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 08/11/2022] [Indexed: 06/17/2023]
Abstract
A heavy ion beam probe (HIBP) has been designed for the QUEST spherical tokamak to measure plasma turbulence and the profiles of electric potential profiles. Using a cesium ion beam with an energy of several 10 keV, the observable region covers most of the upper half of the plasma. Although the probe beam is deflected by the poloidal magnetic field produced by plasma current and poloidal coil currents, it can be detected under plasma current up to 150 kA by modifying the trajectories with two electrostatic sweepers. According to the numerical estimation of the intensity of the detected beam, sufficient signal intensity for measuring plasma turbulence can be obtained over almost the measurable area when the electron density is up to 1 × 1019 m-3, which is larger than the cut-off density of electron cyclotron heating in QUEST. The performance of the designed HIBP is sufficient to explore the mechanisms of heat and particle transport in magnetically confined plasmas, including the influence of plasma wall interactions, which is a goal of the QUEST project.
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Affiliation(s)
- T Ido
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - M Hasegawa
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - R Ikezoe
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - T Onchi
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - K Hanada
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - H Idei
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - K Kuroda
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Y Nagashima
- RIAM, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
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Hasegawa M, Hasegawa C, Nagaya Y, Tsubaki K, Mazaki Y. Multiply Twisted Chiral Macrocycles Clamped by Tethered Binaphthyls Exhibiting High Circularly Polarized Luminescence Brightness. Chemistry 2022; 28:e202203091. [DOI: 10.1002/chem.202203091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Masashi Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Chika Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Yuki Nagaya
- Graduate School of Life and Environmental Sciences Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku Kyoto 606-8522 Japan
| | - Kazunori Tsubaki
- Graduate School of Life and Environmental Sciences Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku Kyoto 606-8522 Japan
| | - Yasuhiro Mazaki
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
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Hasegawa M, Hasegawa C, Nagaya Y, Tsubaki K, Mazaki Y. Front Cover: Multiply Twisted Chiral Macrocycles Clamped by Tethered Binaphthyls Exhibiting High Circularly Polarized Luminescence Brightness (Chem. Eur. J. 59/2022). Chemistry 2022. [DOI: 10.1002/chem.202203089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Masashi Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Chika Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Yuki Nagaya
- Graduate School of Life and Environmental Sciences Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku Kyoto 606-8522 Japan
| | - Kazunori Tsubaki
- Graduate School of Life and Environmental Sciences Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku Kyoto 606-8522 Japan
| | - Yasuhiro Mazaki
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
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Hasegawa M, Hasegawa C, Nagaya Y, Tsubaki K, Mazaki Y. Multiply Twisted Chiral Macrocycles Clamped by Tethered Binaphthyls Exhibiting High Circularly Polarized Luminescence Brightness. Chemistry 2022; 28:e202202218. [DOI: 10.1002/chem.202202218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Masashi Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Chika Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Yuki Nagaya
- Graduate School of Life and Environmental Sciences Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku Kyoto 606-8522 Japan
| | - Kazunori Tsubaki
- Graduate School of Life and Environmental Sciences Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku Kyoto 606-8522 Japan
| | - Yasuhiro Mazaki
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
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Nabeta M, Tanaka S, Note K, Hasegawa M, Sakai K, Arai W, Sakuraba Y, Iki A. O-256 Effect of an endometrial microbiota on pregnancy outcome of frozen embryo transfer (FET) cycles. Hum Reprod 2022. [DOI: 10.1093/humrep/deac106.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Study question
Is specific microbiota in the endometrial fluid (EF) associated with pregnancy outcome in a frozen embryo transfer (FET) cycles?
Summary answer
Lactobacillus had high abundance in the microbiota of endometrial fluid of patients with successful pregnancy after FET treatment.
What is known already
Recently, the relationship between endometrial microbiota and repeated implantation failure (RIF) has been reported. While Lactobacillus-dominated microbiota (LDM, defined as > = 90 % Lactobacillus species) in the EF of the receptive phase was reported to be associated with favorable reproductive outcome, non-LDM (< 90 % Lactobacillus species) was found to decrease implantation, clinical pregnancy, ongoing pregnancy, and live birth rates. However, it is still unclear the effect of the microbiota on pregnancy outcome of the patients with the assisted reproductive technology, especially a frozen embryo transfer (FET) treatment.
Study design, size, duration
We included 802 cycles with clinical results of pregnancy outcome after FET treatment at our clinic from December 2018 to January 2021. Endometrium fluid was collected before FET and microbiota was examined. We examined the relationship between endometrial microbiota and pregnancy outcome in 463 cycles in which the endometrial microbiome test results were available, pregnancy outcome was known, CD138 negative, and less than 38years (229 cycles were positive pregnancy and 234 cycles were negative pregnancy).
Participants/materials, setting, methods
Sampling was performed carefully avoiding contamination before FET treatment. Extracted genomic DNA was sequenced for the region of 16S ribosomal RNA using next-generation sequencer (Endometrial microbiome test, Varinos, Japan). The sequencing data was assigned to bacterial taxonomy and the background-contaminated bacteria were excluded from the microbiome profile. Lactobacillus abundance was calculated. After concordance of patient background, Lactobacillus abundance between successful and unsuccessful pregnancy group was compared.
Main results and the role of chance
We investigated the effect of microbiota in EF, especially Lactobacillus, for the infertile female with frozen embryo transfer (FET) as an assisted reproductive treatment with large amount of cycles (802 cycles). First, all of cycles were divided into a successful pregnancy group (305/802) and an unsuccessful pregnant group (497/802), and then the abundance of Lactobacillus was analyzed (the pregnancy ratio was 38.0%). The mean abundance of Lactobacillus in EF was significantly higher in the successful pregnant group than in the unsuccessful pregnant group (70.2% 40.5 versus 63.5% 43.1, p = 0.007). To further refine the conditions of each cycle, patient backgrounds of each cycle were compared. There was a significant difference in age and CD138 results between the successful pregnant group and unsuccessful pregnant group, so the analysis was performed with the limited cycles with CD138-negative and under 38 years (229/463 versus 234/463, respectively). However, even under this strict condition, the mean abundance of Lactobacillus was significantly higher in the pregnant group than in the unsuccessful pregnant group (72.1% 39.7 versus 61.1% 44.4, p = 0.003). These results suggest that the endometrial environment with high Lactobacillus abundance is more conducive to pregnancy in FET treatment.
Limitations, reasons for caution
The limitation of this study is that the design is not a randomized controlled one, although it is prospective.
Wider implications of the findings
The results of this study suggest that the endometrial microbiota at the time of embryo implantation, especially Lactobacillus genus, is highly relevant to pregnancy outcome, implying that disruption of the intrauterine microbiota may cause infertility. We need further studies to improve the endometrial microbiota of infertile women.
Trial registration number
not applicable
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Affiliation(s)
- M Nabeta
- TSUBAKI Women's Clinic, Obstetrics and Gynecology , Matsuyama City- Ehime, Japan
| | | | - K Note
- TSUBAKI Women's Clinic, Obstetrics and Gynecology , Matsuyama City- Ehime, Japan
| | - M Hasegawa
- TSUBAKI Women's Clinic, Obstetrics and Gynecology , Matsuyama City- Ehime, Japan
| | - K Sakai
- TSUBAKI Women's Clinic, Obstetrics and Gynecology , Matsuyama City- Ehime, Japan
| | - W Arai
- Varinos Inc ., Research, Tokyo, Japan
| | | | - A Iki
- TSUBAKI Women's Clinic, Obstetrics and Gynecology , Matsuyama City- Ehime, Japan
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Ishikawa Y, Tanaka N, Asano Y, Kodera M, Shirai Y, Akahoshi M, Hasegawa M, Matsushita T, Kazuyoshi S, Motegi S, Yoshifuji H, Yoshizaki A, Kohmoto T, Takagi K, Oka A, Kanda M, Tanaka Y, Ito Y, Nakano K, Kasamatsu H, Utsunomiya A, Sekiguchi A, Niro H, Jinnin M, Makino K, Makino T, Ihn H, Yamamoto M, Suzuki C, Takahashi H, Nishida E, Morita A, Yamamoto T, Fujimoto M, Kondo Y, Goto D, Sumida T, Ayuzawa N, Yanagida H, Horita T, Atsumi T, Endo H, Shima Y, Kumanogoh A, Hirata J, Otomo N, Suetsugu H, Koike Y, Tomizuka K, Yoshino S, Liu X, Ito S, Hikino K, Suzuki A, Momozawa Y, Ikegawa S, Tanaka Y, Ishikawa O, Takehara K, Torii T, Sato S, Okada Y, Mimori T, Matsuda F, Matsuda K, Imoto I, Matsuo K, Kuwana M, Kawaguchi Y, Ohmura K, Terao C. OP0112 THE EVER-LARGEST ASIAN GWAS FOR SYSTEMIC SCLEROSIS AND TRANS-POPULATION META-ANALYSIS IDENTIFIED SEVEN NOVEL LOCI AND A CANDIDATE CAUSAL SNP IN A CIS-REGULATORY ELEMENT OF THE FCGR REGION. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundGenome-wide association studies (GWASs) have identified 29 disease-associated single nucleotide polymorphisms (SNPs) for systemic sclerosis (SSc) in non-human leukocyte antigen (HLA) regions (1-7). While these GWASs have clarified genetic architectures of SSc, study subjects were mainly Caucasians limiting application of the findings to Asians.ObjectivesThe study was conducted to identify novel causal variants for SSc specific to Japanese subjects as well as those shared with European population. We also aimed to clarify mechanistic effects of the variants on pathogenesis of SSc.MethodsA total of 114,108 subjects comprising 1,499 cases and 112,609 controls were enrolled in the two-staged study leading to the ever-largest Asian GWAS for SSc. After applying a strict quality control both for genotype and samples, imputation was conducted using the reference panel of the phase 3v5 1,000 genome project data combined with a high-depth whole-genome sequence data of 3,256 Japanese subjects. We conducted logistic regression analyses and also combined the Japanese GWAS results with those of Europeans (6) by an inverse-variance fixed-effect model. Polygenicity and enrichment of functional annotations were evaluated by linkage disequilibrium score regression (LDSC), Haploreg and IMPACT programs. We also constructed polygenic risk score (PRS) to predict SSc development.ResultsWe identified three (FCRLA-FCGR, TNFAIP3, PLD4) and four (EOMES, ESR1, SLC12A5, TPI1P2) novel loci in Japanese GWAS and a trans-population meta-analysis, respectively. One of Japanese novel risk SNPs, rs6697139, located within FCGR gene clusters had a strong effect size (OR 2.05, P=4.9×10-11). We also found the complete LD variant, rs10917688, was positioned in cis-regulatory element and binding motif for an immunomodulatory transcription factor IRF8 in B cells, another genome-wide significant locus in our trans-ethnic meta-analysis and the previous European GWAS. Notably, the association of risk allele of rs10917688 was significant only in the presence of the risk allele of the IRF8. Intriguingly, rs10917688 was annotated as one enhancer-related histone marks, H3K4me1, in B cells, implying that FCGR gene(s) in B cells may play an important role in the pathogenesis of SSc. Furhtermore, significant heritability enrichment of active histone marks and a transcription factor C-Myc were found in B cells both in European and Japanese populations by LDSC and IMPACT, highlighting a possibility of a shared disease mechanism where abnormal B-cell activation may be one of the key drivers for the disease development. Finally, PRS using effects sizes of European GWAS moderately fit in the development of Japanese SSc (AUC 0.593), paving a path to personalized medicine for SSc.ConclusionOur study identified seven novel susceptibility loci in SSc. Downstream analyses highlighted a novel disease mechanism of SSc where an interactive role of FCGR gene(s) and IRF8 may accelerate the disease development and B cells may play a key role on the pathogenesis of SSc.References[1]F. C. Arnett et al. Ann Rheum Dis, 2010.[2]T. R. Radstake et al. Nat Genet, 2010.[3]Y. Allanore et al. PLoS Genet, 2011.[4]O. Gorlova et al. PLoS Genet, 2011.[5]C. Terao et al. Ann Rheum Dis, 2017.[6]E. López-Isac et al. Nat Commun, 2019.[7]W. Pu et al. J Invest Dermatol, 2021.Disclosure of InterestsNone declared
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Hasegawa M, Takahashi K, Mazaki Y. Chalcogenacalix[4]dithienoselenophene: Synthesis and Properties of Cyclic Thio- and Selenoether of Dithienoselenophene. BCSJ 2022. [DOI: 10.1246/bcsj.20220003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masashi Hasegawa
- Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373
| | - Kazuhiro Takahashi
- Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373
| | - Yasuhiro Mazaki
- Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373
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22
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Asano S, Niwa K, Sasaki T, Gaida NA, Hasegawa M. High pressure synthesis and the valence state of vanadium ions for the novel transition metal pernitride, CuAl 2-type VN 2. Dalton Trans 2022; 51:2656-2659. [PMID: 35106526 DOI: 10.1039/d1dt04310b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel transition metal pernitride, CuAl2-type VN2, has been synthesized at a pressure above 73.3 GPa. The bulk modulus has been determined to be K0 = 347(12) GPa. By hard X-ray absorption spectrum measurements of VN2, the valence state of transition metal ions in pernitrides has been for the first time experimentally reported.
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Affiliation(s)
- Shuto Asano
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan.
| | - Ken Niwa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan.
| | - Takuya Sasaki
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan.
| | - Nico Alexander Gaida
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan.
| | - Masashi Hasegawa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan.
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Sato T, Nakajima M, Takeishi Y, Nakajima K, Egawa K, Watanabe E, Hasegawa M. Effect of brown rice intake on obese people with exercise habits. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hasegawa M, Ishida Y, Sasaki H, Ishioka S, Usui K, Hara N, Kitahara M, Imai Y, Mazaki Y. Helical Oligophenylene Linked with [2.2]Paracyclophane: Stereogenic π-Conjugated Dye for Highly Emissive Chiroptical Properties. Chemistry 2021; 27:16225-16231. [PMID: 34549839 DOI: 10.1002/chem.202103158] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Indexed: 12/18/2022]
Abstract
A stereogenic π-system based on dimer (2) and trimer (3) of [2.2]paracyclophane (PC) and biphenyl was prepared and its structural, photophysical, and chiroptical properties were investigated. X-ray analysis revealed that the quaterphenyl moieties in 2 adopt a double helical structure anchoring [2.2]PC from both sides. Furthermore, 3 forms a isosceles triangle structure with a large chiral cavity. A homodesmotic reaction using DFT calculations revealed that 2 has a larger strain energy than 3 owing to its highly twisted phenylene linkers. Electronic and circular dichroic (CD) spectra were recorded in CH2 Cl2 solution. The spectra of both 2 and 3 are similar, and their longest absorption band accompanying a remarkable Cotton effect is attributed to the transition from HOMO to LUMO, which is delocalized to the quaterphenyl moiety. These compounds exhibit fairly high fluorescence quantum yields (ϕ=0.70-0.83) and moderate dissymmetry factor (|gCPL |=1.6×10-3 ) in circularly polarized luminescence (CPL).
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Affiliation(s)
- Masashi Hasegawa
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Yuki Ishida
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Hiroaki Sasaki
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Sumire Ishioka
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Kazuteru Usui
- Faculty of Pharmaceutical Sciences, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida, Tokyo, 194-8543, Japan
| | - Nobuyuki Hara
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Maho Kitahara
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Yasuhiro Mazaki
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
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Hasegawa M, Nojima Y, Mazaki Y. Cover Feature: Circularly Polarized Luminescence in Chiral π‐Conjugated Macrocycles (ChemPhotoChem 12/2021). CHEMPHOTOCHEM 2021. [DOI: 10.1002/cptc.202100262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Masashi Hasegawa
- Department of Chemistry Graduate School of Science Kitasato University Sagamihara, Kanagawa 252-0373 Japan
| | - Yuki Nojima
- Department of Chemistry Graduate School of Science Kitasato University Sagamihara, Kanagawa 252-0373 Japan
| | - Yasuhiro Mazaki
- Department of Chemistry Graduate School of Science Kitasato University Sagamihara, Kanagawa 252-0373 Japan
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26
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Kobayashi T, Hamamoto M, Okazaki T, Hasegawa M, Takahashi S. Does the Global Limb Anatomic Staging System Inframalleolar Modifier Influence Long Term Outcomes of Chronic Limb Threatening Ischaemia after Distal Bypass? J Vasc Surg 2021. [DOI: 10.1016/j.jvs.2021.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Ishikawa R, Tanaka R, Morishita S, Kohno Y, Sawada H, Sasaki T, Ichikawa M, Hasegawa M, Shibata N, Ikuhara Y. Reprint of: Automated geometric aberration correction for large-angle illumination STEM. Ultramicroscopy 2021; 231:113410. [PMID: 34756616 DOI: 10.1016/j.ultramic.2021.113410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/14/2021] [Accepted: 01/19/2021] [Indexed: 10/20/2022]
Abstract
Depth resolution in scanning transmission electron microscopy (STEM) is physically limited by the illumination angle. In recent notable progress on aberration correction technology, the illumination angle is significantly improved to be larger than 60 milliradians, which is 2 or 3 times larger than those in the previous generation. However, for three-dimensional depth sectioning with the large illumination angles, it is prerequisite to ultimately minimize lower orders of aberrations such as 2- and 3-fold astigmatisms and axial coma. Here, we demonstrate a live aberration correction using atomic-resolution STEM images rather than Ronchigram images. The present method could save the required time for aberration correction, and moreover, it is possible to build up a fully automated program. We demonstrate the method should be useful not only for axial depth sectioning but also phase imaging in STEM including differential phase-contrast imaging.
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Affiliation(s)
- Ryo Ishikawa
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan; PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan.
| | - Riku Tanaka
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan
| | | | - Yuji Kohno
- JEOL Ltd, 3-1-2, Akishima, Tokyo 196-8558, Japan
| | | | - Takuya Sasaki
- Department of Materials Physics, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Masanari Ichikawa
- Department of Materials Physics, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Masashi Hasegawa
- Department of Materials Physics, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Naoya Shibata
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan; Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya, Aichi 456-8587, Japan
| | - Yuichi Ikuhara
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan; Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya, Aichi 456-8587, Japan
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Sasaki T, Noda K, Gaida NA, Niwa K, Hasegawa M. Pressure-Tunable Crystal Structure and Magnetic Transition Temperature of the Nowotny Chimney-Ladder CrGe γ Phase. Inorg Chem 2021; 60:14525-14529. [PMID: 34528805 DOI: 10.1021/acs.inorgchem.1c01887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A Nowotny chimney-ladder (NCL) chromium germanide (CrGeγ) with varying compositions has been synthesized under high pressure. Crystal structure parameters of the NCL CrGeγ have been calculated by Le Bail refinement based on the superspace group. The refined γ of CrGeγ increases with the synthesis pressure, indicating an increasing Ge content. The NCL CrGeγ phases are ferromagnetic at T = 2 K regardless of their composition, and the magnetic transition temperature (TC) increases when the γ becomes higher. It is noteworthy that CrGe1.763 and CrGe1.774 synthesized at P = 10 and 14 GPa have magnetic transition temperatures of T = 295 and 333 K above room temperature, respectively. Surprisingly, the magnetic transition temperature has changed by ΔTC = 270 K, although the γ values of the raw material and the sample synthesized at P = 14 GPa differ by only Δγ = 0.05, corresponding to an atomic concentration of 0.62 atom %. The synthesis pressure acts as an essential parameter in tuning the composition of the NCL phase. Accordingly, the high-pressure synthesis may significantly control several physical characteristics of NCL phases by utilizing compositional and structural modulation.
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Affiliation(s)
- Takuya Sasaki
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Koki Noda
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Nico Alexander Gaida
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Ken Niwa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Masashi Hasegawa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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Affiliation(s)
- Masashi Hasegawa
- Department of Chemistry Graduate School of Science Kitasato University Sagamihara, Kanagawa 252-0373 Japan
| | - Yuki Nojima
- Department of Chemistry Graduate School of Science Kitasato University Sagamihara, Kanagawa 252-0373 Japan
| | - Yasuhiro Mazaki
- Department of Chemistry Graduate School of Science Kitasato University Sagamihara, Kanagawa 252-0373 Japan
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Chang CC, Sasaki T, Gaida NA, Niwa K, Hasegawa M. Crystal and Electronic Structure of U 7Te 12-Type Tungsten Nitride Synthesized under High Pressure. Inorg Chem 2021; 60:13278-13283. [PMID: 34436875 DOI: 10.1021/acs.inorgchem.1c01633] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tungsten nitride continues to drive fundamental interests because of its potential as a functional compound, which combines features such as high hardness together with thermal, chemical, and wear resistance. Here, we report a novel tungsten nitride phase synthesized from MoC-type WN0.6 and molecular nitrogen after laser irradiation at P = 70 GPa in a diamond anvil cell. This novel phase is quenchable at ambient pressure and determined to be U7Te12-type tungsten nitride and crystallizes in the hexagonal space group (P6) having lattice parameters of a = 8.2398(3) Å, c = 2.94948(14) Å, and V = 173.423(13) Å3. Tungsten atoms are coordinated to eight and nine nitrogen atoms, higher than previously reported tungsten nitrides. The bulk modulus is determined to be K0 = 312 (5) GPa (K0' = 4.0 fixed), and DFT calculations predict that U7Te12-type W7N12 has a metallic nature.
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Affiliation(s)
- Chung-Ching Chang
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Takuya Sasaki
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Nico Alexander Gaida
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Ken Niwa
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Masashi Hasegawa
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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Hanada K, Yoshida N, Hasegawa M, Oya M, Oya Y, Takagi I, Hatayama A, Shikama T, Idei H, Nagashima Y, Ikezoe R, Onchi T, Kuroda K, Kawasaki S, Higashijima A, Nagata T, Shimabukuro S, Nakamura K, Murakami S, Takase Y, Gao X, Liu H, Qian J. Overview of recent progress on steady state operation of all-metal plasma facing wall device QUEST. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2021.101013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Shigeta K, Hasegawa M, Kosaka T, Hishiki T, Ryuichi M, Miyajima A, Suematsu M, Kikuchi E, Oya M. Isocitrate dehydrogenase 2 regulates intracellular metabolic reprogramming in chemo-resistant urothelial carcinoma. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)00840-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Utsunomiya A, Chino T, Oyama N, Niwa S, Hasegawa M. 475 A curcumin-derivative LG283 that inhibits TGF-β/Smad/Snail-dependent mesenchymal transition ameliorates bleomycin-induced skin fibrosis and vascular injury. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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34
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Kasamatsu H, Chino T, Hasegawa T, Utsunomiya N, Utsunomiya A, Oyama N, Yamada M, Hasegawa M. 466 A calpain inhibitor ALLN alleviates bleomycin-induced skin fibrosis via antagonizing TGF-β/Smad signaling pathway. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Taylor JA, Hasegawa M, Benoit CM, Freire JA, Theodore M, Ganea DA, Innocenti SM, Lu T, Gründemann J. Single cell plasticity and population coding stability in auditory thalamus upon associative learning. Nat Commun 2021; 12:2438. [PMID: 33903596 PMCID: PMC8076296 DOI: 10.1038/s41467-021-22421-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 03/01/2021] [Indexed: 02/02/2023] Open
Abstract
Cortical and limbic brain areas are regarded as centres for learning. However, how thalamic sensory relays participate in plasticity upon associative learning, yet support stable long-term sensory coding remains unknown. Using a miniature microscope imaging approach, we monitor the activity of populations of auditory thalamus (medial geniculate body) neurons in freely moving mice upon fear conditioning. We find that single cells exhibit mixed selectivity and heterogeneous plasticity patterns to auditory and aversive stimuli upon learning, which is conserved in amygdala-projecting medial geniculate body neurons. Activity in auditory thalamus to amygdala-projecting neurons stabilizes single cell plasticity in the total medial geniculate body population and is necessary for fear memory consolidation. In contrast to individual cells, population level encoding of auditory stimuli remained stable across days. Our data identifies auditory thalamus as a site for complex neuronal plasticity in fear learning upstream of the amygdala that is in an ideal position to drive plasticity in cortical and limbic brain areas. These findings suggest that medial geniculate body's role goes beyond a sole relay function by balancing experience-dependent, diverse single cell plasticity with consistent ensemble level representations of the sensory environment to support stable auditory perception with minimal affective bias.
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Affiliation(s)
| | - Masashi Hasegawa
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | | | | | - Marine Theodore
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Dan Alin Ganea
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | | | - Tingjia Lu
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | - Jan Gründemann
- Department of Biomedicine, University of Basel, Basel, Switzerland.
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Bonn, Germany.
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Nojima Y, Hasegawa M, Hara N, Imai Y, Mazaki Y. Front Cover: Small Figure‐Eight Luminophores: Double‐Twisted Tethered Cyclic Binaphthyls Boost Circularly Polarized Luminescence (Chem. Eur. J. 19/2021). Chemistry 2021. [DOI: 10.1002/chem.202100231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuki Nojima
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Masashi Hasegawa
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
| | - Nobuyuki Hara
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Yoshitane Imai
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University Higashi-Osaka Osaka 577-8502 Japan
| | - Yasuhiro Mazaki
- Graduate School of Science Kitasato University Sagamihara Kanagawa 252-0373 Japan
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Nojima Y, Hasegawa M, Hara N, Imai Y, Mazaki Y. Small Figure-Eight Luminophores: Double-Twisted Tethered Cyclic Binaphthyls Boost Circularly Polarized Luminescence. Chemistry 2021; 27:5923-5929. [PMID: 33427332 DOI: 10.1002/chem.202005320] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/04/2021] [Indexed: 12/20/2022]
Abstract
Double-twisted cyclic binaphthyls, in which two naphthalenes are tethered by -O(CH2 )n O- linkage (n=1-3), have been synthesized. X-ray analyses and DFT calculations revealed a tightly constrained stereogenic figure-eight geometry. Tethering of two naphthalenes by short linkage forces a small dihedral angle, and the cyclic binaphthyls with short tether (n=1, 2) exhibit remarkable boosting of the glum value (1.0-1.6×10-2 ) in circularly polarized luminescence (CPL) and unusual glum /gabs ratios (0.93-1.3). These experimental high |glum | values are in accord with the results of excited state TD-DFT calculations, which show transannular interactions and that consequent extensive delocalization occurs throughout the figure-eight π-core. As a result, the present figure-eight luminophore promote the elongation of the magnetic transition dipole moment that results in significant increases in glum values.
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Affiliation(s)
- Yuki Nojima
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Masashi Hasegawa
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Nobuyuki Hara
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Yasuhiro Mazaki
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
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Hasegawa M, Taira M, Kanaya T, Araki K, Watanabe T, Tominaga Y, Kugo Y, Ishida H, Narita A, Ueno T, Ueno T, Sawa Y. Clinical Outcomes for Children with Left Ventricular Noncompaction and Cardiomyopathy. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Gaida NA, Niwa K, Sasaki T, Hasegawa M. Phase relations and thermoelasticity of magnesium silicide at high pressure and temperature. J Chem Phys 2021; 154:144701. [PMID: 33858168 DOI: 10.1063/5.0044648] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Within the exploration of sustainable and functional materials, narrow bandgap magnesium silicide semiconductors have gained growing interest. Intriguingly, squeezing silicides to extreme pressures and exposing them to non-ambient temperatures proves fruitful to study the structural behavior, tune the electronic structure, or discover novel phases. Herein, structural changes and thermoelastic characteristics of magnesium silicides were probed with synchrotron x-ray diffraction techniques using the laser-heated diamond anvil cell and large volume press at high pressure and temperature and temperature-dependent synchrotron powder diffraction. Probing the ambient phase of Mg2Si (anti-CaF2-type Mg2Si, space group: Fm3¯m) at static pressures of giga-Pascals possibly unveiled the transformation to metastable orthorhombic anti-PbCl2-type Mg2Si (Pnma). Interestingly, heating under pressures introduced the decomposition of Mg2Si to hexagonal Mg9Si5 (P63) and minor Mg. Using equations of state (EoS), which relate pressure to volume, the bulk moduli of anti-CaF2-type Mg2Si, anti-PbCl2-type Mg2Si, and Mg9Si5 were determined to be B0 = 47(2) GPa, B0 ≈ 72(5) GPa, and B0 = 58(3) GPa, respectively. Employing a high-temperature EoS to the P-V-T data of anti-CaF2-type Mg2Si provided its thermoelastic parameters: BT0 = 46(3) GPa, B'T0 = 6.1(8), and (∂BT0/∂T)P = -0.013(4) GPa K-1. At atmospheric pressure, anti-CaF2-type Mg2Si kept stable at T = 133-723 K, whereas Mg9Si5 transformed to anti-CaF2-type Mg2Si and Si above T ≥ 530 K. This temperature stability may indicate the potential of Mg9Si5 as a mid-temperature thermoelectric material, as suggested from previous first-principles calculations. Within this realm, thermal models were applied, yielding thermal expansion coefficients of both silicides together with estimations of their Grüneisen parameter and Debye temperature.
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Affiliation(s)
- Nico Alexander Gaida
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Ken Niwa
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Takuya Sasaki
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Masashi Hasegawa
- Department of Materials Physics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Yoneda N, Shikama T, Hanada K, Mori S, Onchi T, Kuroda K, Hasuo M, Ejiri A, Matsuzaki K, Osawa Y, Peng Y, Kawamata Y, Sakamoto S, Idei H, Ido T, Nakamura K, Nagashima Y, Ikezoe R, Hasegawa M, Higashijima A, Nagata T, Shimabukuro S. Toroidal flow measurements of impurity ions in QUEST ECH plasmas using multiple viewing chords emission spectroscopy. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2021.100905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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41
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Kuzmin A, Kobayashi M, Hanada K, Idei H, Onchi T, Mori S, Yoneda N, Shikama T, Hasuo M, Ido T, Nagashima Y, Ikezoe R, Hasegawa M, Kuroda K, Kono K, Matsuo S, Nagata T, Shimabukuro S, Higashijima A, Niiya I, Zushi H. Investigation of radial distribution of atomic hydrogen flux to the plasma facing components in steady state discharges in QUEST tokamak. Nuclear Materials and Energy 2021. [DOI: 10.1016/j.nme.2020.100872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ishihama K, Ono T, Okawara T, Harada T, Furusho K, Hasegawa M, Nojima Y, Koide T, Abe M, Hisaeda Y. Dinuclear Triple-Stranded Helicates Comprising Al(III), Ga(III), or In(III) and a Hydrazine-Linked Bisiminopyrrolyl Ligand: Synthesis, Structure, Optical Resolution, and Chiroptical Properties. BCSJ 2021. [DOI: 10.1246/bcsj.20200327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kohei Ishihama
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Toshikazu Ono
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Toru Okawara
- Department of Creative Engineering, National Institute of Technology, Kitakyushu College, 5-20-1 Shii, Kokuraminami-ku, Kitakyushu, Fukuoka 802-0985, Japan
| | - Takunori Harada
- Department of Integrated Science and Technology, Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Kiyonao Furusho
- Department of Integrated Science and Technology, Faculty of Science and Technology, Oita University, 700 Dannoharu, Oita 870-1192, Japan
| | - Masashi Hasegawa
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Yuki Nojima
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Taro Koide
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masaaki Abe
- Department of Material Science and Research Center for New Functional Materials, Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori-cho, Hyogo 678-1297, Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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Nojima Y, Hasegawa M, Hara N, Imai Y, Mazaki Y. Small Figure-Eight Luminophores: Double-Twisted Tethered Cyclic Binaphthyls Boost Circularly Polarized Luminescence. Chemistry 2021; 27:5834. [PMID: 33586141 DOI: 10.1002/chem.202100232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Invited for the cover of this issue are Masashi Hasegawa, Yoshitane Imai and co-workers at Kitasato University and Kindai University. The image depicts the reported figure-eight molecule as an M. C. Escher-inspired 'impossible object'. Read the full text of the article at 10.1002/chem.202005320.
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Affiliation(s)
- Yuki Nojima
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Masashi Hasegawa
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
| | - Nobuyuki Hara
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Yasuhiro Mazaki
- Graduate School of Science, Kitasato University, Sagamihara, Kanagawa, 252-0373, Japan
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Ishikawa R, Tanaka R, Morishita S, Kohno Y, Sawada H, Sasaki T, Ichikawa M, Hasegawa M, Shibata N, Ikuhara Y. Automated geometric aberration correction for large-angle illumination STEM. Ultramicroscopy 2021; 222:113215. [PMID: 33548863 DOI: 10.1016/j.ultramic.2021.113215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 01/14/2021] [Accepted: 01/19/2021] [Indexed: 10/22/2022]
Abstract
Depth resolution in scanning transmission electron microscopy (STEM) is physically limited by the illumination angle. In recent notable progress on aberration correction technology, the illumination angle is significantly improved to be larger than 60 milliradians, which is 2 or 3 times larger than those in the previous generation. However, for three-dimensional depth sectioning with the large illumination angles, it is prerequisite to ultimately minimize lower orders of aberrations such as 2- and 3-fold astigmatisms and axial coma. Here, we demonstrate a live aberration correction using atomic-resolution STEM images rather than Ronchigram images. The present method could save the required time for aberration correction, and moreover, it is possible to build up a fully automated program. We demonstrate the method should be useful not only for axial depth sectioning but also phase imaging in STEM including differential phase-contrast imaging.
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Affiliation(s)
- Ryo Ishikawa
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan; PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan.
| | - Riku Tanaka
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan
| | | | - Yuji Kohno
- JEOL Ltd, 3-1-2, Akishima, Tokyo 196-8558, Japan
| | | | - Takuya Sasaki
- Department of Materials Physics, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Masanari Ichikawa
- Department of Materials Physics, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Masashi Hasegawa
- Department of Materials Physics, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Naoya Shibata
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan; Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya, Aichi 456-8587, Japan
| | - Yuichi Ikuhara
- Institute of Engineering Innovation, University of Tokyo, Bunkyo, Tokyo, 113-8656, Japan; Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya, Aichi 456-8587, Japan
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Sasaki T, Kanie K, Yokoi T, Niwa K, Gaida NA, Matsunaga K, Hasegawa M. Crystal and Electronic Structures of MoSi 2-Type CrGe 2 Synthesized under High Pressure. Inorg Chem 2021; 60:1767-1772. [PMID: 33444497 DOI: 10.1021/acs.inorgchem.0c03240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chromium germanides, namely, Nowotny chimney-ladder-phase CrGe1.77 and MoSi2-type CrGe2, were synthesized above 15 GPa or more via laser heating using a diamond anvil cell (LHDAC). MoSi2-type CrGe2, which is the most Ge-rich compound in the Cr-Ge system, crystallizes in the tetragonal structure with a space group of I4/mmm (no. 139) and lattice parameters of a = 3.24919(6) Å and c = 8.0523(3) Å and is isostructural with MoSi2. MoSi2-type CrGe2 has a deep pseudogap caused by the splitting of 3d orbitals with Cr, as evidenced by ab initio calculation. In this article, we have succeeded in synthesizing a binary compound between transition-metal and metalloid elements for the first time at high pressures above 10 GPa using the LHDAC. This pathway opens the possibility to explore more compounds in this system and may provide new insights into the fundamental interaction between these two elements.
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Affiliation(s)
- Takuya Sasaki
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Kota Kanie
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Tatsuya Yokoi
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Ken Niwa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Nico Alexander Gaida
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Katsuyuki Matsunaga
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
| | - Masashi Hasegawa
- Department of Materials Physics, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8603, Japan
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Sato K, Hasegawa M, Nojima Y, Hara N, Nishiuchi T, Imai Y, Mazaki Y. Circularly Polarized Luminescence of a Stereogenic Curved Paraphenylene Anchoring a Chiral Binaphthyl in Solution and Solid State. Chemistry 2021; 27:1323-1329. [PMID: 33079420 DOI: 10.1002/chem.202004283] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/17/2020] [Indexed: 12/17/2022]
Abstract
A curved stereogenic [6]paraphenylene ([6]PP), anchoring a chiral binaphthyl scaffold at 7,7'-positions, was prepared and investigated for its properties as a solid-state circularly polarized luminescence (CPL) dye. X-ray analysis revealed a helically twisted structure of PP units induced by axial chirality of binaphthyl framework. The curved [6]PP exhibits fluorescence in powder and polymethyl methacrylate (PMMA) film as well as solution. A significant increase in quantum yield was observed for a non-fluid PMMA film owing the suppression of the molecular motion. The gCPL values of the dye in solution and as PMMA film were almost the same (4.3-4.4×10-3 ) and lager than that in powder. TD-DFT calculations in the excited state suggest that the exciton can be delocalized into a twisted PP unit to produce a larger magnetic transition dipole moment.
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Affiliation(s)
- Kenta Sato
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Masashi Hasegawa
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Yuki Nojima
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Nobuyuki Hara
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-1-4 Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Tomohiko Nishiuchi
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka, 560-0043, Japan
| | - Yoshitane Imai
- Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, 3-1-4 Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
| | - Yasuhiro Mazaki
- Department of Chemistry, Graduate School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
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Sato K, Hasegawa M, Nojima Y, Hara N, Nishiuchi T, Imai Y, Mazaki Y. Front Cover: Circularly Polarized Luminescence of a Stereogenic Curved Paraphenylene Anchoring a Chiral Binaphthyl in Solution and Solid State (Chem. Eur. J. 4/2021). Chemistry 2021. [DOI: 10.1002/chem.202004853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Kenta Sato
- Department of Chemistry Graduate School of Science Kitasato University 1-15-1 Kitasato, Minami-ku Sagamihara Kanagawa 252-0373 Japan
| | - Masashi Hasegawa
- Department of Chemistry Graduate School of Science Kitasato University 1-15-1 Kitasato, Minami-ku Sagamihara Kanagawa 252-0373 Japan
| | - Yuki Nojima
- Department of Chemistry Graduate School of Science Kitasato University 1-15-1 Kitasato, Minami-ku Sagamihara Kanagawa 252-0373 Japan
| | - Nobuyuki Hara
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University 3-1-4 Kowakae, Higashi-Osaka Osaka 577-8502 Japan
| | - Tomohiko Nishiuchi
- Department of Chemistry Graduate School of Science Osaka University 1-1 Machikaneyama, Toyonaka Osaka 560-0043 Japan
| | - Yoshitane Imai
- Department of Applied Chemistry Faculty of Science and Engineering Kindai University 3-1-4 Kowakae, Higashi-Osaka Osaka 577-8502 Japan
| | - Yasuhiro Mazaki
- Department of Chemistry Graduate School of Science Kitasato University 1-15-1 Kitasato, Minami-ku Sagamihara Kanagawa 252-0373 Japan
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Shirahata K, Takashika M, Hirabayashi K, Hasegawa M, Otani H, Yamamoto K, Ie Y, Shimizu T, Aoyagi S, Iyoda M. Reduction of Ethynylenes to Vinylenes in a Macrocyclic π-Extended Thiophene Skeleton Under McMurry Coupling Conditions. J Org Chem 2021; 86:302-309. [PMID: 33290650 DOI: 10.1021/acs.joc.0c02080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
McMurry coupling is one of the most useful and convenient tools for the preparation of π-conjugated molecules. However, for the synthesis of strained macrocycles containing ethynylene linkages, reduction of ethynylene to vinylene linkage sometimes took place. Especially, for the synthesis of macrocyclic π-extended thiophene hexamers using McMurry coupling of dialdehyde 1 composed of three thienylene, two ethynylene, and two formyl groups, reduction of ethynylenes to vinylenes often takes place to produce unique products in a one-pot procedure, depending on very small steric and electronic effects such as reaction temperature, amounts of titanium reagent, and substituents of thiophene hexamers. The attractive structures and functional properties of reduced thiophene hexamers have been determined using X-ray analysis and OFET measurements.
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Affiliation(s)
- Keigo Shirahata
- Graduate School of Environment and Information Sciences, Yokohama National University, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Masataka Takashika
- Graduate School of Environment and Information Sciences, Yokohama National University, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Kazunori Hirabayashi
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Masashi Hasegawa
- School of Science, Kitasato University, Sagamihara, Kanagawa 252-0373, Japan
| | - Hiroyuki Otani
- Graduate School of Environment and Information Sciences, Yokohama National University, Hodogaya-ku, Yokohama, Kanagawa 240-8501, Japan
| | - Keitaro Yamamoto
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Yutaka Ie
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Toshio Shimizu
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - Shinobu Aoyagi
- Department of Information and Basic Science, Nagoya City University, Nagoya 467-8501, Japan
| | - Masahiko Iyoda
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
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Ono T, Ishihama K, Taema A, Harada T, Furusho K, Hasegawa M, Nojima Y, Abe M, Hisaeda Y. Dinuclear Triple‐Stranded Helicates Composed of Tetradentate Ligands with Aluminum(III) Chromophores: Optical Resolution and Multi‐color Circularly Polarized Luminescence Properties. Angew Chem Int Ed Engl 2020; 60:2614-2618. [DOI: 10.1002/anie.202011450] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Toshikazu Ono
- Department of Chemistry and Biochemistry Graduate School of Engineering Center for Molecular Systems (CMS) Kyushu Univerisy 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Kohei Ishihama
- Department of Chemistry and Biochemistry Graduate School of Engineering Center for Molecular Systems (CMS) Kyushu Univerisy 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Ai Taema
- Department of Chemistry and Biochemistry Graduate School of Engineering Center for Molecular Systems (CMS) Kyushu Univerisy 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
| | - Takunori Harada
- Department of Integrated Science and Technology Faculty of Science and Technology Oita University Dannoharu 700 Oita City 870-1192 Japan
| | - Kiyonao Furusho
- Department of Integrated Science and Technology Faculty of Science and Technology Oita University Dannoharu 700 Oita City 870-1192 Japan
| | - Masashi Hasegawa
- Department of Chemistry Graduate School of Science Kitasato University 1-15-1 Kitasato, Minami-ku Sagamihara Kanagawa 252-0373 Japan
| | - Yuki Nojima
- Department of Chemistry Graduate School of Science Kitasato University 1-15-1 Kitasato, Minami-ku Sagamihara Kanagawa 252-0373 Japan
| | - Masaaki Abe
- Department of Material Science University of Hyogo 3-2-1 Kouto Kamigori-cho Hyogo 678-1297 Japan
| | - Yoshio Hisaeda
- Department of Chemistry and Biochemistry Graduate School of Engineering Center for Molecular Systems (CMS) Kyushu Univerisy 744 Motooka, Nishi-ku Fukuoka 819-0395 Japan
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50
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Sato T, Nakajima M, Takeishi Y, Nakajima K, Hasegawa M. Effect of brown rice on the blood exam in Japanese sumo wrestling. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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