A5051700476- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Advanced NMR Techniques and Applications
- Solid-state spectroscopy and crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Supramolecular Chemistry and Complexes
- Crystallography and molecular interactions
- Magnetism in coordination complexes
- Conducting polymers and applications
- Fuel Cells and Related Materials
- Gamma-ray bursts and supernovae
- Luminescence and Fluorescent Materials
- Astronomical Observations and Instrumentation
- NMR spectroscopy and applications
- Organic and Molecular Conductors Research
- SAS software applications and methods
- Molecular spectroscopy and chirality
- Enzyme Production and Characterization
- Covalent Organic Framework Applications
- Photochemistry and Electron Transfer Studies
- Electron and X-Ray Spectroscopy Techniques
- Polyoxometalates: Synthesis and Applications
- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Methane Hydrates and Related Phenomena
Kanazawa University
2016-2025
Japan Science and Technology Agency
2008-2018
Material Sciences (United States)
2017
Meijo University
2016
Nara Women's University
2016
Osaka University
2015
Japan Atomic Energy Agency
2015
Japan Proton Accelerator Research Complex
2015
University of Hyogo
2008-2015
Hitachi (Japan)
2013
Abstract Polymer‐based room‐temperature‐phosphorescent (RTP) materials are attractive alternatives to low‐molecular‐weight organic RTP compounds because they can form self‐standing transparent films with high thermal stability. However, their lifetimes in air usually short (<≈0.4 s). Here, the simple amorphous polymer, poly(styrene sulfonic acid) (PSS), exhibits an ultralong lifetime when desiccated. The maximum is 1.22 s, which three times that of previously reported polymers. be...
Controlling guests: Porous coordination polymers containing mobile organic groups, such as naphthalene rings (see picture), are synthesized, and their rotational motion is characterized by solid-state 2H NMR spectroscopy. The rotation of the groups can be switched off (blue) guest (blue spheres) adsorption on (yellow) again desorption. Supporting information for this article available WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z603196_s.pdf or from author. Please note: publisher...
A quasielastic neutron scattering and solid-state (2)H NMR spectroscopy study of the polymeric spin-crossover compound {Fe(pyrazine)[Pt(CN)(4)]} shows that switching rotation a molecular fragment--the pyrazine ligand--occurs in association with change spin state. The was examined on wide time scale (10(-13)-10(-3) s) by both techniques, which clearly demonstrated combination between transition under external stimuli (temperature chemical). rings are seen to perform 4-fold jump motion about...
The first radical polymerisation of styrene in porous coordination polymers has been carried out, providing stable propagating radicals (living radicals), and a specific space effect the host frameworks on monomer reactivity is demonstrated.
Molecules confined in nanospaces will have distinctly different properties to those the bulk state because of formation specific molecular assemblies and conformations. We studied chain conformation dynamics single polystyrene (PSt) chains highly regular one-dimensional nanochannels a porous coordination polymer [Zn 2(bdc) 2ted] n ( 1; bdc = 1,4-benzenedicarboxylate, ted triethylenediamine). Characterization by two-dimensional (2D) heteronuclear (1)H- (13)C NMR gave direct demonstration...
A porous coordination polymer (PCP) with immobilization of sodium cations on the pore surface has been synthesized, by employing a bifunctional carboxylate/sulfonate ligand, and structurally characterized. The framework 1D channels dimension 4.9 x A2 shows high thermal stability ( approximately 330 degrees C), affording Type I adsorption isotherms for CO2, acetone, benzene. chemical shift 13C NMR characteristic energy (betaE0) acetone adsorbed in this compound represent Lewis acidity framework.
We systematically analyzed the high-quality Suzaku data of 88 Seyfert galaxies. obtained a clear relation between absorption column density and equivalent width 6.4 keV line above 10$^{23}$ cm$^{-2}$, suggesting wide-ranging $10^{23-24.5}$ cm$^{-2}$ with similar solid Fe abundance 0.7--1.3 solar for 2 The EW 1 galaxies are typically 40--120 eV, existence Compton-thick matter like torus $>10^{23}$ angle $(0.15-0.4)*4pi$, no difference neutral is visible An absorber lower $10^{21-23}$...
Topochemical reactions provide selective products based on the molecular position; however, they generally require molecules to be placed in strictly limited orientations and distances, making them less versatile. In this study, we found that by confining trans-4-styrylpyridine (4-spy) as a reactive substrate flexible metal–organic framework (MOF) nanospace, [2+2] cycloadducts can selectively obtained, even when distance between two C═C bonds of 4-spy crystal is 5.9 Å, which much larger than...
Abstract Strong interchain interactions render unsubstituted polythiophene un‐fusible, non‐melting, and insoluble. Therefore, control of the packing structure, which has a profound effect on optical electronic properties polymer, never been achieved. Unsubstituted was prepared in one‐dimensional channels [La(1,3,5‐benzenetrisbenzoate)] n , where polymer chains form unprecedented assembly structures mediated by host framework. It is noteworthy that emission carrier transport were drastically...
We have demonstrated downsizing effects of the soft porous crystal, [Zn(isophthalate)(4,4'-bipyridyl)](n) (CID-1), on adsorption behavior between CID-1 and nanocrystal (NCID-1). The difference results from packing crystal structures dynamics frameworks.
A series of chiral fluorescent polymers containing optically active triptycene units in the main chain were synthesized via Sonogashira-Hagihara coupling copolymerizations (R,R)- or (S,S)-2,6-diethynyltriptycene with a range diiodoaryls. Their optical and chiroptical properties investigated under various solution conditions. We observe that these emitted circularly polarized light owing to framework handed twisted rigid structure, fluorescence colors could be tuned whole visible from blue...
We present the results of deep 140 ks Suzaku X-ray observations north-east (NE) radio relic merging galaxy cluster Abell 2255. The temperature structure 2255 is measured out to 0.9 times virial radius (1.9 Mpc) in NE direction for first time. map central region suggests a complex distribution, which agrees with previous work. Additionally, on larger-scale, we confirm that drops from 6 keV around center 3 at outskirts, two discontinuities r ~ 5′ (450 kpc) and ~12′ (1100 center. Their...
Confinement of polymers in nano-spaces can induce unique molecular dynamics and properties. Here we show weight fractionation by the confinement single polymer chains poly(ethylene oxide) (PEO) one-dimensional (1D) channels crystalline pillar[5]arene. Pillar[5]arene crystals are activated heating under reduced pressure. The immersed melted PEO, causing to selectively take up PEO with high mass fraction. is caused greater number attractive CH/π interactions between C-H groups π-electron-rich...
Designed molecular-sized cavities is key to efficient transport, storage, and separation of small molecules. Herein, we report that the adsorption properties void-containing polymers were altered by changing linker units for condensation with hexa-aminated trinaphtho[3.3.3]propellane as partner. Aldehyde linkers resulted in formation N=C–NH perimidine-like segments polymer structures showed higher selectivity alkanes over carbon dioxide than network NH–B– NH moieties derived from boronic...
Abstract Background The increasing use of extracorporeal membrane oxygenation (ECMO) has highlighted challenges in managing bleeding complications. Optimal transfusion strategies remain uncertain for this diverse patient group, necessitating accurate predictive tools. This study developed and validated a machine learning (ML) algorithm to predict complications patients with ECMO, using red blood cell (RBC) as surrogate marker. Methods Data from the Tokushukai Medical Database (2018–2022),...
Cointercalation systems consisting of graphite, sodium, and some linear glycol ethers (glymes) are anticipated for use as negative electrodes in sodium ion batteries because their superior properties such outstanding cycle performance. We synthesized a ternary intercalation compound deuterated diglyme (diglyme-d14), graphite by solution reaction. Then we investigated the dynamics coordination structure diglyme-d14 molecules 2H solid-state NMR. Two coordinate to each rigidly, except rotation...
Novel chiral triptycenes showing circularly polarized luminescence based on the supramolecular chirality induced in hydrogen-bonded aggregate have been developed.
Anhydrous organic crystalline materials incorporating imidazolium hydrogen succinate (Im-Suc), which exhibit high proton conduction even at temperatures above 100 °C, are attractive for elucidating mechanisms toward the development of solid electrolytes fuel cells. Herein, quantum chemical calculations were used to investigate mechanism in terms hydrogen-bonding (H-bonding) changes and restricted molecular rotation Im-Suc. The local H-bond structures characterized by vibrational frequency...
Gäste als Steuerung: Poröse Koordinationspolymere, die bewegliche organische Gruppen enthalten, z. B. Naphthalinringe (siehe Bild), wurden synthetisiert, und ihre Drehbewegung wurde mithilfe der Festkörper-2H-NMR-Spektroskopie charakterisiert. Die Rotation kann durch Adsorption eines Gastes (blaue Kugeln) gestoppt (blau) seine Desorption wieder gestartet werden (gelb).