A5103785569- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- Covalent Organic Framework Applications
- Luminescence and Fluorescent Materials
- Carbon dioxide utilization in catalysis
- Synthetic Organic Chemistry Methods
- Supramolecular Chemistry and Complexes
- Advanced Semiconductor Detectors and Materials
- Photonic and Optical Devices
- Advanced Optical Sensing Technologies
- Marine Sponges and Natural Products
- Chemical Synthesis and Reactions
- Spectroscopy and Quantum Chemical Studies
- Neonatal Health and Biochemistry
- Hemoglobin structure and function
- Microstructure and mechanical properties
- Bioactive Natural Diterpenoids Research
- CO2 Reduction Techniques and Catalysts
- Ocular and Laser Science Research
- Luminescence Properties of Advanced Materials
- Aluminum Alloy Microstructure Properties
- Neural Networks and Reservoir Computing
- Advanced Chemical Sensor Technologies
- Dendrimers and Hyperbranched Polymers
Osaka University
2018-2025
Yamagata University Hospital
2024-2025
Hokkaido University
2021-2025
Yamagata University
2021-2024
Shizuoka University
2011-2024
Kansai University
2018-2023
Keio University
2022-2023
Tokyo University of Science
2016-2023
The University of Tokyo
2019-2022
Kobe University
2020-2022
A porous hydrogen-bonded organic framework (HOF) responsive to acid was constructed from a hexaazatrinaphthylene derivative with carboxyphenyl groups (CPHATN). Precise structures of both 1,2,4-trichlorobenzene solvate [CPHATN-1(TCB)] and activated HOF permanent porosity (CPHATN-1a) were successfully determined by single-crystalline X-ray diffraction analysis. Permanent CPHATN-1a evaluated gas sorption experiments at low temperature. also shows significant thermal stability up 633 K. Its...
Well prepared It is well known that species radiate into new niches by adapting to novel environments. But why do some in this way, while other, related, not. Ishikawa et al. looked across sticklebacks determine some, originally marine, lineages were able colonize postglacial freshwater environments (see the Perspective Weber and Tong). They found a gene involved fatty acid desaturation was duplicated lineages. Transgenic manipulation of allowed marine synthesize acids thus survive on...
Enhancing thermal and chemical durability increasing surface area are two main directions for the construction improvement of performance porous hydrogen-bonded organic frameworks (HOFs). Herein, a hexaazatriphenylene (HAT) derivative that possesses six carboxyaryl groups serves as suitable building block systematic thermally chemically durable HOFs with high through shape-fitted docking between HAT cores interpenetrated three-dimensional network. A carboxybiphenyl forms stable...
The library of isostructural porous frameworks enables a systematic survey to optimize the structure and functionality materials.
Abstract Crystalline porous molecular frameworks formed through intermolecular hydrogen bonding are often called hydrogen-bonded organic (HOFs) by analogy to metal (MOFs) and covalent (COFs). Although the origin may go back 1960s, HOFs have recently been investigated as a new family of functional materials. In this review, composed tritopic, tetratopic, hexatopic carboxylic acid derivatives reviewed considering structural aspects such isostructurality. These typically form H-bonded hcb , dia...
When a chiral liquid crystal is given transport current, unidirectional molecular motion known to take place, which called the Lehmann effect. In this paper, we study mysterious heat-current-driven effect using two types of hemispherical cholesteric droplets polarizing, reflecting, confocal and fluorescent microscopies. Both droplets, coexisting with isotropic phase contacting on glass substrate, are characterized by concavo-convex modulated surface inside orientational helix. Further, only...
Transparent inorganic luminescent materials have attracted considerable scientific and industrial attention recently because of their high chemical durability formability. However, photoluminescence dynamics ns2-type ions in oxide glasses has not been well examined, even though they can exhibit quantum efficiency. We report on the emission property Sn2+-doped strontium borate glasses. Photoluminescence studies show that peak energy spectrum changes with time site distribution centre glass....
There are two types of membrane-embedded ion transport machineries in nature. The pumps generate electrochemical potential by energy-coupled active transportation, while the channels produce action stimulus-dependent passive transportation. About 80% amino acid residues light-driven proton pump archaerhodopsin-3 (AR3) and light-gated cation channel channelrhodopsin (ChR) differ although they share close similarity architecture. Therefore, question arises: How can these proteins function...
Electrochemical reduction of N-Boc-α-aminosulfones in DMF using an undivided cell equipped with a Pt plate cathode and Mg rod anode under atmospheric pressure bubbling carbon dioxide through the solution constant current conditions resulted reductive C–S bond cleavage elimination benzenesulfinate ion generating corresponding anion species followed by fixation to give N-Boc-α-amino acids moderate good yields.
Abstract A divergent method for the synthesis of α,α′‐diarylacenaphtho[1,2‐ c ]phosphole P ‐oxides has been established; α,α′‐dibromoacenaphtho[ ‐oxide, which was prepared through a Ti II ‐mediated cyclization 1,8‐bis(trimethylsilylethynyl)naphthalene, underwent Stille coupling with three different kinds aryltributylstannanes to afford α,α′‐diarylacenaphtho[ in moderate good yields. X‐ray crystallographic analyses and UV/Vis absorption/fluorescence measurements have revealed that degree...
Abstract Heterogeneous dinuclear rhodium(II) coordination polymer, [Rh2(p-BDC)2]n (p-BDC = 1,4-benzenedicarboxylate), which formed self-assembly infinite two-dimentional slit sheets structure was performed as hydrogen production catalyst for photochemical reduction of water under visible light irradiation in the presence a multicomponent system containing Ru(bpy)32+, MV2+, and EDTA–2Na.
New advances in understanding the photobehaviour of HOFs based on HAT.<bold>CBPHAT-1a</bold>HOF (crystals) exhibits a strong response to HCl vapors. This ability is observed by eye as change its color or emission.
Here, we describe a strategy to obtain nanoporous liquid-crystalline (LC) membranes by incorporating photocleavable ortho-nitrobenzyl group in polymerizable columnar liquid crystals. Two derivatives were synthesized with propylene and nonylene spacers, respectively, between the ionic moieties introduce various size nanopores after photocleavage. The prepared photopolymerization LC states, followed photocleavage washing methanol. resulting show virus rejection of 99.99%. Although value...
A dibenzo[<italic>g</italic>,<italic>p</italic>]chrysene (DBC)-based hydrogen-bonded organic framework (HOF) possessing surface area of 1548 m<sup>2</sup>g<sup>−1</sup>and photoconductivity was constructed.
Abstract Interpenetration of low‐dimensional networked structural motifs crucially affects porosity, stability, and properties the whole reticular framework. However, varying controlling manner interpenetration is still challenging. Herein, a porous hydrogen‐bonded organic framework (HOF) with wvm ‐like weave constructed by triaxially woven chicken wires X‐shaped tetra‐armed tetrakis(carboxybiphenyl)ethene CBPE , formally...
An investigation using the aroma extract dilution analysis (AEDA) technique applied to concentrates prepared from tea infusions of two different types Chinese chrysanthemum flowers (flower buds, blooming flowers) revealed that 29 peaks were detected in concentrates, and 17 compounds newly identified or tentatively flower tea. AEDA also having high flavor factors mainly consisted a floral/sweet note addition metallic phenol-like/spicy notes. Among them, four as verbenone, ethyl...
Abstract Enhancing thermal and chemical durability increasing surface area are two main directions for the construction improvement of performance porous hydrogen‐bonded organic frameworks (HOFs). Herein, a hexaazatriphenylene (HAT) derivative that possesses six carboxyaryl groups serves as suitable building block systematic thermally chemically durable HOFs with high through shape‐fitted docking between HAT cores interpenetrated three‐dimensional network. A carboxybiphenyl forms stable...
Chloroformates are key reagents for synthesizing carbonates and carbamates. The present study reports a novel photo-on-demand in situ synthesis of chloroformates with CHCl3 solution containing primary alkyl alcohol. It further allowed the one-pot carbamates through subsequent addition alcohols or amines, respectively.
The construction of strained carbon skeletons by ring-closing olefin metathesis (RCM) was investigated. With well-designed diene 4, RCM found to be applicable the formation a highly inside-outside bicyclo[4.4.1]undecane skeleton ingenol, bioactive diterpenoid, and formal total synthesis optically active ingenol (1) achieved. key features this are an A-ring spirocyclization ketone with allylic chloride unit, 26, ring closure B-ring metathesis. Starting from Funk's keto ester 6, intermediate...