A5090428762- Supramolecular Self-Assembly in Materials
- Lipid Membrane Structure and Behavior
- Surfactants and Colloidal Systems
- Polydiacetylene-based materials and applications
- Glycosylation and Glycoproteins Research
- Carbohydrate Chemistry and Synthesis
- Supramolecular Chemistry and Complexes
- Liquid Crystal Research Advancements
- Advanced Sensor and Energy Harvesting Materials
- RNA Interference and Gene Delivery
- Food Chemistry and Fat Analysis
- Nanopore and Nanochannel Transport Studies
- Chemical Synthesis and Analysis
- Conducting polymers and applications
- Spectroscopy and Quantum Chemical Studies
- Microbial bioremediation and biosurfactants
- Advanced Materials and Mechanics
- Asymmetric Hydrogenation and Catalysis
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Polymer Synthesis and Characterization
- Asymmetric Synthesis and Catalysis
- Carbon Nanotubes in Composites
- Molecular spectroscopy and chirality
- Synthetic Organic Chemistry Methods
- biodegradable polymer synthesis and properties
Japan Science and Technology Agency
2004-2024
National Institute of Advanced Industrial Science and Technology
2011-2024
Catalytic Materials (United States)
2021
Material (Belgium)
2018
University of Malaya
2012
Tokyo University of Science
2007-2008
Nara Institute of Science and Technology
2007
The University of Tokyo
1987-2006
Fukuoka University
2003
Shandong University
2003
Organic nanotubes (ONTs) are tubular nanostructures prepared from small organic molecules or macromolecules. These structures have attracted growing attention because their inner and outer spaces exhibit unique properties that may be exploited for potential applications. In the first part of this review, we describe methodologies to construct well-defined ONTs: how control dimensions, discriminate surfaces, functionalize nanostructures. The ONTs contain cylindrical nanospaces can capture,...
Abstract Two highly enantioselective methods for hydrocyanation of aldehydes were developed by using chiral alkoxytitanium reagents. Treatment benzaldehyde with cyanotrimethylsilane in the presence a affords mandelonitrile good chemical and optical yields. By use cyanotitanium reagent generated situ from cyanotrimethylsilane, aliphatic are converted into corresponding cyanohydrins manner.
The aqueous-phase behavior of mannosylerythritol lipid A (MEL-A), which is a glycolipid biosurfactant produced from vegetable oils by yeast strains the genus Pseudozyma, was investigated using polarized optical microscopy, small-angle X-ray scattering (SAXS), and differential scanning calorimetry (DSC). MEL-A found to self-assemble into variety distinctive lyotropic liquid crystals including sponge (L3), bicontinuous cubic (V2), lamella (Lα) phases. On basis SAXS measurements, we determined...
The amino groups on the inner surface of nanotube that was self-assembled from unsymmetrical bolaamphiphile, N-(2-aminoethyl)-N'-(β-d-glucopyranosyl)-icosanediamide 1, were modified covalently with a fluorescence donor dye. This functionalization surfaces has allowed us to achieve construction an optical recognition system for encapsulation guest molecules. Fluorescence resonance energy transfer (FRET) located ferritin labeled acceptor enabled visualize and nanofluidic features in...
Our review highlights lipid liquid crystal nanocarriers, essentially their design considerations and sugar-based materials for specific targeted delivery.
Abstract Nematic liquid crystal elastomers (N-LCE) exhibit intriguing mechanical properties, such as reversible actuation and soft elasticity, which manifests a wide plateau of low nearly-constant stress upon stretching. N-LCE also have characteristically slow relaxation, sometimes prevents their shape recovery. To understand how the inherent nematic order retards arrests equilibration, here we examine hysteretic stress-strain characteristics in series specifically designed main-chain N-LCE,...
Mixed molecular species of cardanyl glucoside derived from renewable resources provide nanotubes upon self-assembly in water, while the saturated homologue generated a twisted fibrous morphology. The mixture was fractionated into four individual components order to study their contribution nanotube formation. rational control self-assembled helical morphologies achieved by binary self-assembling and monoene derivatives. This method can generate diversity high-axial-ratio nanostructures...
The thermal phase transition and self-assembly behaviors in water of the crystalline lamellar films prepared from unsymmetrical bolaamphiphiles, N-(2-aminoethyl)-N'-(β-d-glucopyranosyl)-alkanediamide [1(n), n = 12, 14, 16, 17, 18, 20], have been studied using differential scanning calorimetry, polarized light microscopy, variable-temperature (VT) X-ray diffraction (XRD), VT-IR spectroscopy. behavior allowed us to classify bolaamphiphiles into two categories: short chain 1(n) (n 17) long 18...
Thermoreversible gelation and microphase formation of aqueous solutions a methylated polyrotaxane (MePR) were investigated by means differential scanning microcalorimetry, rheometry, X-ray diffractometry (XRD). The MePR show lower critical solution temperature (LCST) form an elastic gel with increasing temperature. sol−gel transition the was induced deformation aggregates α-cyclodextrins (α-CDs) due to hydrophobic dehydration hydration, respectively. XRD investigation revealed localization...
A series of glucopyranosylamide lipids, N-(X-octadecenoyl)-β-d-glucopyranosylamine [X = 13-cis (1), 11-cis (2), 9-cis (3), 6-cis (4), and 9-cis,12-cis (5)] their saturated homologue N-octadecanoyl-β-d-glucopyranosylamine (6), which differ in the position a cis double bond C18 hydrocarbon chains, have been synthesized. The effect on chiral self-assembly each glycolipid has examined by scanning electron microscopy, transmission X-ray diffraction, UV, circular dichroism (CD). derivative 2 was...
Self-assembly of an unsymmetrical bolaamphiphile produces either lipid nanotubes with cationic inner surfaces or nanotapes, depending on the initial molecular packing, which in turn depends solvent conditions. The have different and outer surfaces, covered amino sugar functionalities, respectively, effectively encapsulate anionic nanomaterials hollow cylinder without capillary action (see Figure).
The release behavior of fluorescent dyes, oligo DNAs and spherical proteins from self-assembled organic nanotubes having 7-9 nm inner diameters has been studied in terms novel nanocontainers with high-axial ratios. Both much smaller asymmetric outer surfaces are characteristic the nanotubes. acid-dissociation constant (pKa) amino groups located at surface thermal phase transition temperature (Tg-l) nanotube were evaluated based on pH titration variable-temperature circular dichroism (CD)...
The asymmetric hydrocyanation of aldehydes with cyanotrimethylsilane proceeds by the use a chiral alkoxy titanium(IV) to give corresponding cyanohydrins good enantioselectivity.
Abstract Transportation, release behavior, and stability of a green fluorescent protein (GFP, 3×4 nm) in self‐assembled organic nanotubes with three different inner diameters (10, 20, 80 have been studied terms novel nanocontainers. Selective immobilization acceptor dye on the surface enabled us to not only visualize transportation GFP nanochannels but also detect encapsulated bulk solution real time, based fluorescence resonance energy transfer (FRET). Obtained diffusion constants rates...
When excited by visible light, relaxation of a strained molecule in the β-phase tetra- ortho -bromo azobenzene facilitates light induced transition to α-phase. This produces striking photosalient effect.
Light, transformation, release! Self-assembly of a simple amphiphile with an azobenzene unit produced organic nanotube 20 nm inner diameter. The trans-to-cis photoisomerization the within solid bilayer membranes induced transformation to cylindrical nanofibers (see graphic). This way, was able precisely release encapsulated guest molecules as response photostimulus.
Abstract Helically coiled and linear polydopamine (PDA) nanofibers were selectively fabricated with two different types of lipid nanotubes (LNTs) that acted as templates. The obtained PDA‐LNT hybrid showed morphological advantages such higher light absorbance photothermal conversion effect compared to a counterpart. Laser irradiation the induced change subsequent release encapsulated guest molecule. In cellular experiments, efficiently eliminated HeLa cells because its strong affinity tumor...