Search results for: Miki Hasegawa

Items from 1 to 20 out of 44 results

article

Coordinated Halide and Pseudo Halide‐Dependent Structures and Photoluminescence of Defective Double Cubane Zinc(II) Clusters

Toshiaki Kuramitsu, Sotaro Kusumoto, Hitomi Ohmagari, Miki Hasegawa, more

European Journal of Inorganic Chemistry > 2021 > 12 > 1160 - 1164

Tetranuclear zinc(II) complexes [Zn₄(L)₄(μ₃‐OCH₃)₂(X)₂] (L=2‐((benzyloxy)carbonyl)‐6‐methoxyphenolate; X=Cl⁻ (1), Br⁻ (2), I⁻ (3), N₃⁻ (4), or NCS⁻ (5)), have “defective” double‐cubane cores [Zn₄O₆], which are bridged by two μ₃‐methoxo and four μ₂‐phenolato oxygen atoms in each discrete complex. In halide complexes 1, 2 and 3, two zinc(II) ions are in slightly distorted octahedral coordinations and...

article

Soft Crystals: Flexible Response Systems with High Structural Order

Masako Kato, Hajime Ito, Miki Hasegawa, Kazuyuki Ishii

Chemistry – A European Journal > 25 > 20 > 5105 - 5112

A new material concept of soft crystals is proposed. Soft crystals respond to gentle stimuli such as vapor exposure and rubbing but maintain their structural order and exhibit remarkable visual changes in their shape, color, and luminescence. Various interesting examples of soft crystals are introduced in the article. By exploring the interesting formation and phase‐transition phenomena of soft crystals...

article

Frontispiece: Soft Crystals: Flexible Response Systems with High Structural Order

Masako Kato, Hajime Ito, Miki Hasegawa, Kazuyuki Ishii

Chemistry – A European Journal > 25 > 20 > n/a - n/a

This article proposes the concept of soft crystals; flexible responsive systems with high structural order. Soft crystals are regular solids with stable and highly ordered structures. However, they undergo characteristic facile structural transformations and phase transitions in response to weak but specific stimuli. For more information, see the Concept article by M. Kato et al. on page 5105 ff....

article

Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion

David C. Izuogu, Takefumi Yoshida, Haitao Zhang, Goulven Cosquer, more

Chemistry – A European Journal > 24 > 37 > 9285 - 9294

Incorporating palladium in the first coordination sphere of acetato‐bridged lanthanoid complexes, [Pd₂Ln₂(H₂O)₂(AcO)₁₀]⋅2 AcOH (Ln=Gd (1), Y (2), Gd_0.4Y_1.6 (3), Eu (4)), led to significant bonding interactions between the palladium and the lanthanoid ions, which were demonstrated by experimental and theoretical methods. We found that electron density was donated from the d⁸ Pd²⁺ ion to Gd³⁺ ion in...

article

Front Cover: Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion (Chem. Eur. J. 37/2018)

David C. Izuogu, Takefumi Yoshida, Haitao Zhang, Goulven Cosquer, more

Chemistry – A European Journal > 24 > 37 > 9165 - 9165

An axial perturbation leading to enhanced magnetic and electronic properties of an acetate‐bridged, palladium–gadolinium complex (1) is reported. Pd²⁺ donated electron density to Gd³⁺ in an unusual fashion despite having an electron deficient d⁸ structure. Consequently, 1 showed the highest pre‐exponential factor for spin relaxation reported so far for any Gd‐based molecular magnet exhibiting slow...

article

Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion

David C. Izuogu, Takefumi Yoshida, Haitao Zhang, Goulven Cosquer, more

Chemistry – A European Journal > 24 > 37 > 9169 - 9169

Invited for the cover of this issue are David C. Izuogu and Takefumi Yoshida with the group of Masahiro Yamashita and co‐workers at Tohoku University, Karlsruhe Institute of Technology, Aoyama Gakuin University, Japan Synchrotron Radiation Research Institute, Tohoku University Institute for Materials Research, University of Cambridge, University of Nigeria, Nsukka and National Institute for Materials Science. Read the full text of the article at ...

article

Multiple Magnetic Relaxation Pathways and Dual‐Emission Modulated by a Heterometallic Tb‐Pt Bonding Environment

Takefumi Yoshida, David Chukwuma Izougu, Daichi Iwasawa, Shuhei Ogata, more

Chemistry – A European Journal > 23 > 44 > 10527 - 10531

A heterometallic Tb‐Pt complex, [Tb₂Pt₃(SAc)₁₂(H₂O)₂] (SAc=thioacetate), was synthesized. Dual emission was modulated by the presence of a heterometallic Tb–Pt bonding environment. The heterometallic Tb–Pt bond lowers the symmetry of the Tb ion and enhanced the emission efficiency. In addition, the Tb–Pt complex shows field‐induced multiple magnetic relaxation pathways. Furthermore, it served as an...

article

Copper(II), Nickel(II), and Cobalt(II)/(III) Self‐Assembled Polynuclear Complexes of Bis[(pyridin‐2‐yl)‐1,2,4‐triazol‐3‐yl]]methane

Alexey N. Gusev, Victor F. Shul'gin, Irina O. Ryush, Miki Hasegawa, more

European Journal of Inorganic Chemistry > 2017 > 3 > 704 - 712

The reactions of bis[(pyridin‐2‐yl)‐1,2,4‐triazol‐3‐yl]methane (H₂L) with copper(II), nickel(II), and cobalt(II) salts afford a series of unusual structures; among them are the homoleptic binuclear complexes [Ni₂(H₂L)₂(H₂O)₄](NO₃)₄·6H₂O (1) and [Ni₂(H₂L)₂Cl₂]Cl₂·4H₂O·2C₄H₈O₂ (2), the octanuclear complex [Ni₈(H₂L)₁₂](NO₃)₁₆·21H₂O (3), and the tetranuclear complexes [Cu₄(HL)₄](ClO₄)₄·C₂H₅OH·3H₂O (4),...

article

Large edge magnetism in oxidized few-layer black phosphorus nanomeshes

Yudai Nakanishi, Ayumi Ishi, Chika Ohata, David Soriano, more

Nano Research > 2017 > 10 > 2 > 718-728

The formation and control of a room-temperature magnetic order in two-dimensional (2D) materials is a challenging quest for the advent of innovative magnetic- and spintronic-based technologies. To date, edge magnetism in 2D materials has been experimentally observed in hydrogen (H)-terminated graphene nanoribbons (GNRs) and graphene nanomeshes (GNMs), but the measured magnetization remains far too...

article

High levels of sphingolipids in human breast cancer

Masayuki Nagahashi, Junko Tsuchida, Kazuki Moro, Miki Hasegawa, more

Journal of Surgical Research > 2016 > 204 > 2 > 435-444

Sphingolipids, including sphingosine-1-phosphate (S1P) and ceramide, have emerged as key regulatory molecules that control various aspects of cell growth and proliferation in cancer. Although important roles of sphingolipids in breast cancer progression have been reported in experimental models, their roles in human patients have yet to be determined. The aims of this study were to determine the levels...

article

Unrestricted modification search reveals lysine methylation as major modification induced by tissue formalin fixation and paraffin embedding

Ying Zhang, Markus Muller, Bo Xu, Yutaka Yoshida, more

PROTEOMICS > 15 > 15 > 2568 - 2579

Formalin‐fixed paraffin‐embedded (FFPE) tissue is considered as an appropriate alternative to frozen/fresh tissue for proteomic analysis. Here we study formalin‐induced alternations on a proteome‐wide level. We compared LC‐MS/MS data of FFPE and frozen human kidney tissues by two methods. First, clustering analysis revealed that the biological variation is higher than the variation introduced by the...

article

Association between non-sentinel lymph node metastasis and clinicopathological factors in sentinel lymph node metastasis positive breast cancer

Yu Koyama, Miki Hasegawa, Kumiko Tatsuda, Jun Sakata, more

Journal of the American College of Surgeons > 2014 > 219 > 4 Supplement > e172-e173

article

Control of the Single‐Molecule Magnet Behavior of Lanthanide‐Diarylethene Photochromic Assemblies by Irradiation with Light

Dawid Pinkowicz, Min Ren, Li‐Min Zheng, Saki Sato, more

Chemistry – A European Journal > 20 > 39 > 12502 - 12513

Lanthanide‐based extended coordination frameworks showing photocontrolled single‐molecule magnet (SMM) behavior were prepared by combining highly anisotropic Dy^III and Ho^III ions with the carboxylato‐functionalized photochromic molecule 1,2‐bis(5‐carboxyl‐2‐methyl‐3‐thienyl)perfluorocyclopentene (H₂dae), which acts as a bridging ligand. As a result, two new compounds of the general formula [{Ln^III...

article

Photophysical studies on ternary mixed ligand europium complexes containing pyridyltriazolylmethane and 1,3-diketonate ligands

Alexey N. Gusev, Miki Hasegawa, Victor F. Shul’gin, Galyna Nishchymenko, more

Inorganica Chimica Acta > 2014 > 414 > Complete > 71-77

1,1-Bis[5-(pyridine-2-yl)-1,2,4-triazol-3-yl]methane have been used to prepare ternary lanthanide complexes in which the remaining ligands are different diketonate-anions. The complexes were characterized by various measurements including single-crystal X-ray crystallography. The characteristic photophysical properties of these complexes, i.e. the absorption and luminescence spectra, the metal-centred...

article

Synthesis, structure and luminescence studies of Eu(III), Tb(III), Sm(III), Dy(III) cationic complexes with acetylacetone and bis(5-(pyridine-2-yl)-1,2,4-triazol-3-yl)propane

Alexey N. Gusev, Miki Hasegawa, Tomohito Shimizu, Tomonori Fukawa, more

Inorganica Chimica Acta > 2013 > 406 > Complete > 279-284

Studies concerning synthesis, structure and luminescence of eight-coordinate Eu, Tb, Sm and Dy complexes of the type [Ln(acac) ₂ (L)]Cl (Hacac=pentanedione-2,4 and L=bis(5-(pyridine-2-yl)-1,2,4-triazol-3-yl)propane) are reported in detail. The obtained complexes were investigated by various means including elemental- and thermogravimetric analysis, IR- and electron transition spectroscopy...

article

Anionic lanthanide complexes with 3-methyl-1-phenyl-4-formylpyrazole-5-one and hydroxonium as counter ion

Victor F. Shul’gin, Oleg V. Konnik, Susana V. Abkhairova, Alexey N. Gusev, more

Inorganica Chimica Acta > 2013 > 402 > Complete > 33-38

A series of [H₃O]⁺[LnL₄]⁻·nH₂O complexes (n=1–3, Ln=Nd, (1), Sm (2), Eu (3), Tb (4); HL=3-methyl-1-phenyl-4-formylpyrazole-5-one) were synthesized and characterized. The structures of the Sm^III and Eu^III complexes were investigated by X-ray diffraction. The isostructutal crystalls 2 and 3 consist the tetrakis [LnL₄]⁻ anions which are linked by H-bonding with the hydroxonium counter-ion and water molecules...

article

Photo- and electroluminescent properties europium complexes using bistriazole ligands

Alexey N. Gusev, Victor F. Shul’gin, Galina Nishimenko, Miki Hasegawa, more

Synthetic Metals > 2013 > 164 > C > 17-21

Luminescent properties of two heteroleptic dibenzoylmethanate europium(III) complexes with 1,3-bis(5-pyridin-2-yl-1,2,4-triazol-3-yl)propane (H₂L¹) and 1,4-bis(5-pyridin-2-yl-1,2,4-triazol-3-yl)butane (H₂L²) as ancillary ligands are described. The two double-layer-type electroluminescent cells with the structures: (1) ITO/NPB(40nm)/Eu(DBM)₂HL¹ (40nm)/LiF (1nm)/Al (100nm) and (2) ITO/NPB(40nm)/Eu(DBM)...

chapter

Photo-luminescence of rare earth complexes in the molecular films

Miki Hasegawa

Technical Digest of the Eighteenth Microoptics Conference > 1 - 2

2013 18th Microoptics Conference (MOC)

Two molecular films with wet-professes, modified stretched polymer film and modified Langmuir-Blodgett technique, were develop to obtain polarized ff emission. The polymer stretching ratios of former film have much effect on the polarized angles of polarized ff emission. The latter film can be control various combinations of compositions.

article

Structural and photophysical studies on ternary Sm(III), Nd(III), Yb(III), Er(III) complexes containing pyridyltriazole ligands

Alexey N. Gusev, Victor F. Shul’gin, Svetlana B. Meshkova, Miki Hasegawa, more

Polyhedron > 2012 > 47 > 1 > 37-45

Two bidentate pyridine-triazole ligands (3-(pyridine-2-yl)-5-phenyl-1,2,4-triazole (L1) and 5-phenyl-2-(2′-pyridyl)-7,8-benzo-6,5-dihydro-1,3,6-triazaindolizine (L2)), have been synthesized and used for Ln(Dbm) ₃ (Ln=Sm(III), Nd(III), Yb(III) and Er(III)) coordination. The structures of the ligands and resulting Sm(III) complex were determined in the solid state by X-ray diffraction. The title...

article

Structural and photophysical studies of europium complexes containing triazole ligands

Alexey N. Gusev, Victor F. Shul’gin, Svetlana B. Meshkova, Pavel G. Doga, more

Inorganica Chimica Acta > 2012 > 387 > Complete > 321-326

Mono- and bistriazoles ligands have been used to prepare ternary mixed ligand europium(III) complexes in which the remaining ligands are dibenzoylmethane anions (DBM). The complexes were characterized by various measurements including single-crystal X-ray crystallography. Photophysical studies on both ligands and the complexes were carried out. The complexes show strong sharp red emissions in the...

Publication date

Set your own date range

Data set

Elsevier (16)
Wiley (11)
Springer (10)
ACS (6)
ieee (1)

Journal

Chemistry – A European Journal (7)
Inorganica Chimica Acta (5)
Monatshefte für Chemie - Chemical Monthly (5)
Inorganic Chemistry (4)
Applied Biochemistry and Biotechnology (2)
Chemical Physics (2)
European Journal of Inorganic Chemistry (2)
Allergology International (1)
Biosensors and Bioelectronics (1)
Biotechnology and Bioprocess Engineering (1)
Breast Cancer (1)
Journal of Luminescence (1)
Journal of Photochemistry & Photobiology, A: Chemistry (1)
Journal of Surgical Research (1)
Journal of the American College of Surgeons (1)
Macromolecular Chemistry and Physics (1)
Nano Research (1)
Organic Letters (1)
PROTEOMICS (1)
Polyhedron (1)
Science and Technology of Advanced Materials (1)
Synthetic Metals (1)
The Journal of Physical Chemistry B (1)
more

INFONA - science communication portal

Search results for: Miki Hasegawa

Coordinated Halide and Pseudo Halide‐Dependent Structures and Photoluminescence of Defective Double Cubane Zinc(II) Clusters

Soft Crystals: Flexible Response Systems with High Structural Order

Frontispiece: Soft Crystals: Flexible Response Systems with High Structural Order

Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion

Front Cover: Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion (Chem. Eur. J. 37/2018)

Slow Magnetic Relaxation in a Palladium–Gadolinium Complex Induced by Electron Density Donation from the Palladium Ion

Multiple Magnetic Relaxation Pathways and Dual‐Emission Modulated by a Heterometallic Tb‐Pt Bonding Environment

Copper(II), Nickel(II), and Cobalt(II)/(III) Self‐Assembled Polynuclear Complexes of Bis[(pyridin‐2‐yl)‐1,2,4‐triazol‐3‐yl]]methane

Large edge magnetism in oxidized few-layer black phosphorus nanomeshes

High levels of sphingolipids in human breast cancer

Unrestricted modification search reveals lysine methylation as major modification induced by tissue formalin fixation and paraffin embedding

Association between non-sentinel lymph node metastasis and clinicopathological factors in sentinel lymph node metastasis positive breast cancer

Control of the Single‐Molecule Magnet Behavior of Lanthanide‐Diarylethene Photochromic Assemblies by Irradiation with Light

Photophysical studies on ternary mixed ligand europium complexes containing pyridyltriazolylmethane and 1,3-diketonate ligands

Synthesis, structure and luminescence studies of Eu(III), Tb(III), Sm(III), Dy(III) cationic complexes with acetylacetone and bis(5-(pyridine-2-yl)-1,2,4-triazol-3-yl)propane

Anionic lanthanide complexes with 3-methyl-1-phenyl-4-formylpyrazole-5-one and hydroxonium as counter ion

Photo- and electroluminescent properties europium complexes using bistriazole ligands

Photo-luminescence of rare earth complexes in the molecular films

Structural and photophysical studies on ternary Sm(III), Nd(III), Yb(III), Er(III) complexes containing pyridyltriazole ligands

Structural and photophysical studies of europium complexes containing triazole ligands

Filter options

Publication date

Content availability

Publication type

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Miki Hasegawa

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options