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Papers by Munenori Numata
Chemistry Letters, Dec 5, 2012
A dynamic oilwater interface generated in a double-Yshaped microfluidic device allowed amphiphili... more A dynamic oilwater interface generated in a double-Yshaped microfluidic device allowed amphiphilic molecules to self-assemble spontaneously for a set period of time, leading to the creation of discrete supramolecular coordination polymers. After elution from the device, these 1-D structures gradually dissociated into their monomer units, regenerating the initial state. The self-assembled structures were maintained only under the flow conditions in the device.
RSC Advances
Anionic water-soluble porphyrins undergo supramolecular polymerization through two independent pa... more Anionic water-soluble porphyrins undergo supramolecular polymerization through two independent pathways—slipped stacking mediated by ionic interactions and face-to-face stacking with the assistance of hydrogen bonding of amide NH units.
Crystals, 2018
In this study, we investigated a unique aspect of the supramolecular polymerization of tetrakis (... more In this study, we investigated a unique aspect of the supramolecular polymerization of tetrakis (4-sulfonatophenyl) porphyrin (TPPS), a self-assembling porphyrin, under non-equilibrium conditions by subtracting the effects of back-pressure on its polymerization. We focused on the enhanced self-assembly abilities of TPPS under a process of rapid proton diffusion in a microflow channel. Rapid protonation caused synchronization of many sets of protonation/deprotonation equilibria on the molecular scale, leading to the production of many sets of growing suparmolecular spices. Pressure effects in the microflow channel, which could potentially promote self-assembly of TPPS, were negligible, becoming predominant only when the system was in the synchronized state.
ChemPlusChem, 2019
One major concern in supramolecular chemistry is how to place different intermolecular interactio... more One major concern in supramolecular chemistry is how to place different intermolecular interactions in a desired position, especially at the terminal ends, of 1D structures. A solution to the problem is co‐assembly in microflow. We demonstrate that kinetic co‐assembly of two kinds of amphiphilic oligo(p‐phenylenevinylene) molecules with different amide groups result in metastable nanofibers where stronger hydrogen‐bonding interactions are regularly inserted as stabilizing wedges. It is found that decomposition of the nanofibers from the ends is suppressed at the wedges, leading to the creation of discrete 1D structures with capped ends (length dispersity Lw/Ln≤1.2), which act as a micrometer‐sized building blocks that can be used for further hierarchical assembly.
Chemistry - A European Journal, 2017
RSC Adv., 2016
A novel strategy has been developed for tuning a polymer's conformation in a microfluidic sys... more A novel strategy has been developed for tuning a polymer's conformation in a microfluidic system. The helical pitch of a semi-artificial polymer was controlled precisely in a top-down manner under the non-equilibrium regulated in the microflow.
Chemistry Letters, 2010
We have developed a novel approach to the preparation of a circularly polarized luminescence mate... more We have developed a novel approach to the preparation of a circularly polarized luminescence material from a natural polysaccharide host and an achrial polythiophene guest.
Chemistry Letters, 2000
ABSTRACT
Chemistry Letters, 2006
β-1, 3-Glucans having various functional appendages (lactoside, ferrocene, pyrene, etc.) can be p... more β-1, 3-Glucans having various functional appendages (lactoside, ferrocene, pyrene, etc.) can be prepared in an convenient, quantitative, and regioselective manner through chemo-selective [3+ 2]-cycloadditions between 6-azido-6-deoxy-curdlan and various functional ...
Chemistry Letters, 2013
ABSTRACT Two kinds of polymeric nanoarchitectures, i.e., one-dimensional polymer composites and t... more ABSTRACT Two kinds of polymeric nanoarchitectures, i.e., one-dimensional polymer composites and two-dimensional sheet-like structures, can be created using a semiartificial helical polysaccharide with one-dimensional cavities and peripheral molecular-recognition sites.
Chemistry Letters, 2010
ABSTRACT We have revealed unique template effects of a semiartificial polysaccharide on the self-... more ABSTRACT We have revealed unique template effects of a semiartificial polysaccharide on the self-assembly of anionic cyanine dyes. The inner space of the polysaccharide acts not only as a nanotemplate for the dye assembly but also as a protective space from unfavorable photobleaching.
Chemistry Letters, 2007
ABSTRACT We here demonstrate that schizophyllan (SPG: one kind of beta-1, 3-glucans) /m-carborane... more ABSTRACT We here demonstrate that schizophyllan (SPG: one kind of beta-1, 3-glucans) /m-carborane nanocomposites can be easily created in a supramolecular manner by utilizing the unique wrapping capability of SPG. TEM observations revealed that incorporated in-carborane molecules adopt continuous one-dimensional (I-D) arrangement in the SPG hydrophobic cavity. We believe that the present system can provide a novel concept not only for the separation of carborane isomers and the construction of one-dimensional architectures but also for the new formulation of boron neutron capture therapy (BNCT) agents.
Chemical Society Reviews, 2007
Organic chemistry Z 0200 Post-Polymerization of Preorganized Assemblies for Creating Shape-Contro... more Organic chemistry Z 0200 Post-Polymerization of Preorganized Assemblies for Creating Shape-Controlled Functional Materials -[about 100 refs.]. -(SADA, K.; TAKEUCHI, M.; FUJITA, N.; NUMATA, M.; SHINKAI*, S.; Chem. Soc. Rev. 36 (2007) 2, 415-435; Dep. Chem. Biochem., Grad. Sch. Eng., Kyushu Univ., Fukuoka 812-81, Japan; Eng.) -Lindner 21-236
Chemical Communications, 2005
b-1,3-Glucan polysaccharides have triple-stranded helical structures whose sense and pitch are co... more b-1,3-Glucan polysaccharides have triple-stranded helical structures whose sense and pitch are comparable to those of polynucleotides. We recently revealed that the b-1,3-glucans could interact with certain polynucleotides to form triple-stranded and helical macromolecular complexes consisting of two polysaccharide-strands and one polynucleotide-strand. This unique property of the b-1,3-glucans has made it possible to utilize these polysaccharides as potential carriers for various functional polynucleotides. In paticular, cell-uptake efficiency of the resultant polysaccharide/polynucleotide complexes was remarkably enhanced when functional groups recognized in a biological system were introduced as pendent groups. The b-1,3-glucans can also interact with various one-dimensional architectures, such as single-walled carbon nanotubes, to produce unique nanocomposites, in which the single-walled carbon nanotubes are entrapped within the helical superstructure of b-1,3-glucans. Various conductive polymers and gold nanoparticles are also entrapped within the helical superstructure in a similar manner. In addition, diacetylene monomers entrapped within the helical superstructure can be photopolymerized to afford the corresponding poly(diacetylene)-nanofibers with a uniform diameter. These findings indicate that the b-1,3-glucans are very attractive and useful materials not only in biotechnology but also in nanotechnology. These unique properties of the b-1,3-glucans undoubtedly originate from their inherent, very strong helix-forming character which has never been observed for other polysaccharides.
Chemical Communications, 2004
We have found that aggregation mode and gelation property of thymidine-based organogelator are af... more We have found that aggregation mode and gelation property of thymidine-based organogelator are affected by the addition of its complementary polynucleotide in organic media.
Chemistry Letters, Dec 5, 2012
A dynamic oilwater interface generated in a double-Yshaped microfluidic device allowed amphiphili... more A dynamic oilwater interface generated in a double-Yshaped microfluidic device allowed amphiphilic molecules to self-assemble spontaneously for a set period of time, leading to the creation of discrete supramolecular coordination polymers. After elution from the device, these 1-D structures gradually dissociated into their monomer units, regenerating the initial state. The self-assembled structures were maintained only under the flow conditions in the device.
RSC Advances
Anionic water-soluble porphyrins undergo supramolecular polymerization through two independent pa... more Anionic water-soluble porphyrins undergo supramolecular polymerization through two independent pathways—slipped stacking mediated by ionic interactions and face-to-face stacking with the assistance of hydrogen bonding of amide NH units.
Crystals, 2018
In this study, we investigated a unique aspect of the supramolecular polymerization of tetrakis (... more In this study, we investigated a unique aspect of the supramolecular polymerization of tetrakis (4-sulfonatophenyl) porphyrin (TPPS), a self-assembling porphyrin, under non-equilibrium conditions by subtracting the effects of back-pressure on its polymerization. We focused on the enhanced self-assembly abilities of TPPS under a process of rapid proton diffusion in a microflow channel. Rapid protonation caused synchronization of many sets of protonation/deprotonation equilibria on the molecular scale, leading to the production of many sets of growing suparmolecular spices. Pressure effects in the microflow channel, which could potentially promote self-assembly of TPPS, were negligible, becoming predominant only when the system was in the synchronized state.
ChemPlusChem, 2019
One major concern in supramolecular chemistry is how to place different intermolecular interactio... more One major concern in supramolecular chemistry is how to place different intermolecular interactions in a desired position, especially at the terminal ends, of 1D structures. A solution to the problem is co‐assembly in microflow. We demonstrate that kinetic co‐assembly of two kinds of amphiphilic oligo(p‐phenylenevinylene) molecules with different amide groups result in metastable nanofibers where stronger hydrogen‐bonding interactions are regularly inserted as stabilizing wedges. It is found that decomposition of the nanofibers from the ends is suppressed at the wedges, leading to the creation of discrete 1D structures with capped ends (length dispersity Lw/Ln≤1.2), which act as a micrometer‐sized building blocks that can be used for further hierarchical assembly.
Chemistry - A European Journal, 2017
RSC Adv., 2016
A novel strategy has been developed for tuning a polymer's conformation in a microfluidic sys... more A novel strategy has been developed for tuning a polymer's conformation in a microfluidic system. The helical pitch of a semi-artificial polymer was controlled precisely in a top-down manner under the non-equilibrium regulated in the microflow.
Chemistry Letters, 2010
We have developed a novel approach to the preparation of a circularly polarized luminescence mate... more We have developed a novel approach to the preparation of a circularly polarized luminescence material from a natural polysaccharide host and an achrial polythiophene guest.
Chemistry Letters, 2000
ABSTRACT
Chemistry Letters, 2006
β-1, 3-Glucans having various functional appendages (lactoside, ferrocene, pyrene, etc.) can be p... more β-1, 3-Glucans having various functional appendages (lactoside, ferrocene, pyrene, etc.) can be prepared in an convenient, quantitative, and regioselective manner through chemo-selective [3+ 2]-cycloadditions between 6-azido-6-deoxy-curdlan and various functional ...
Chemistry Letters, 2013
ABSTRACT Two kinds of polymeric nanoarchitectures, i.e., one-dimensional polymer composites and t... more ABSTRACT Two kinds of polymeric nanoarchitectures, i.e., one-dimensional polymer composites and two-dimensional sheet-like structures, can be created using a semiartificial helical polysaccharide with one-dimensional cavities and peripheral molecular-recognition sites.
Chemistry Letters, 2010
ABSTRACT We have revealed unique template effects of a semiartificial polysaccharide on the self-... more ABSTRACT We have revealed unique template effects of a semiartificial polysaccharide on the self-assembly of anionic cyanine dyes. The inner space of the polysaccharide acts not only as a nanotemplate for the dye assembly but also as a protective space from unfavorable photobleaching.
Chemistry Letters, 2007
ABSTRACT We here demonstrate that schizophyllan (SPG: one kind of beta-1, 3-glucans) /m-carborane... more ABSTRACT We here demonstrate that schizophyllan (SPG: one kind of beta-1, 3-glucans) /m-carborane nanocomposites can be easily created in a supramolecular manner by utilizing the unique wrapping capability of SPG. TEM observations revealed that incorporated in-carborane molecules adopt continuous one-dimensional (I-D) arrangement in the SPG hydrophobic cavity. We believe that the present system can provide a novel concept not only for the separation of carborane isomers and the construction of one-dimensional architectures but also for the new formulation of boron neutron capture therapy (BNCT) agents.
Chemical Society Reviews, 2007
Organic chemistry Z 0200 Post-Polymerization of Preorganized Assemblies for Creating Shape-Contro... more Organic chemistry Z 0200 Post-Polymerization of Preorganized Assemblies for Creating Shape-Controlled Functional Materials -[about 100 refs.]. -(SADA, K.; TAKEUCHI, M.; FUJITA, N.; NUMATA, M.; SHINKAI*, S.; Chem. Soc. Rev. 36 (2007) 2, 415-435; Dep. Chem. Biochem., Grad. Sch. Eng., Kyushu Univ., Fukuoka 812-81, Japan; Eng.) -Lindner 21-236
Chemical Communications, 2005
b-1,3-Glucan polysaccharides have triple-stranded helical structures whose sense and pitch are co... more b-1,3-Glucan polysaccharides have triple-stranded helical structures whose sense and pitch are comparable to those of polynucleotides. We recently revealed that the b-1,3-glucans could interact with certain polynucleotides to form triple-stranded and helical macromolecular complexes consisting of two polysaccharide-strands and one polynucleotide-strand. This unique property of the b-1,3-glucans has made it possible to utilize these polysaccharides as potential carriers for various functional polynucleotides. In paticular, cell-uptake efficiency of the resultant polysaccharide/polynucleotide complexes was remarkably enhanced when functional groups recognized in a biological system were introduced as pendent groups. The b-1,3-glucans can also interact with various one-dimensional architectures, such as single-walled carbon nanotubes, to produce unique nanocomposites, in which the single-walled carbon nanotubes are entrapped within the helical superstructure of b-1,3-glucans. Various conductive polymers and gold nanoparticles are also entrapped within the helical superstructure in a similar manner. In addition, diacetylene monomers entrapped within the helical superstructure can be photopolymerized to afford the corresponding poly(diacetylene)-nanofibers with a uniform diameter. These findings indicate that the b-1,3-glucans are very attractive and useful materials not only in biotechnology but also in nanotechnology. These unique properties of the b-1,3-glucans undoubtedly originate from their inherent, very strong helix-forming character which has never been observed for other polysaccharides.
Chemical Communications, 2004
We have found that aggregation mode and gelation property of thymidine-based organogelator are af... more We have found that aggregation mode and gelation property of thymidine-based organogelator are affected by the addition of its complementary polynucleotide in organic media.