Abstract: Provided is a novel nanoparticle, a contrast agent for magnetic resonance imaging containing the same, and a ligand compound used for production of the nanoparticle. The present invention relates to a nanoparticle including: a metal particle containing iron oxide; and a ligand which is bound to a metal atom on a surface of the metal particle and is represented by formula (3): where m is an integer of 1 to 4, and a broken line represents a coordinate bond with a metal atom on the surface of the metal particle.

Abstract: Provided is a novel nanoparticle, a contrast agent for magnetic resonance imaging containing the same, and a zwitterionic ligand compound used in production of the nanoparticle. The contrast agent for MRI of the present invention can be suitably used as a contrast agent for MRI in a medical field. The nanoparticle and the zwitterionic ligand compound of the present invention are applicable to various pharmaceutical compositions and the like, including a contrast agent for MRI, and can be used widely in the fields of pharmaceuticals, biotechnology, and the like, including various diagnosis methods and examination reagents.

Abstract: Provided is a novel nanoparticle, a contrast agent for magnetic resonance imaging containing the same, and a ligand compound used for production of the nanoparticle. The present invention relates to a nanoparticle including: a metal particle containing iron oxide; and a ligand which is bound to a metal atom on a surface of the metal particle and is represented by formula (3): where m is an integer of 1 to 4, and a broken line represents a coordinate bond with a metal atom on the surface of the metal particle.

Abstract: Provided is an orientation agent for NMR spectroscopy containing a nanosheet which is easy to prepare, excellent in handleability, economic efficiency and versatility, and is capable of being stably aligned to the magnetic field. The nanosheet is coated with a compound having a molecular weight of 1,500 or more and containing 35 or more functional groups per molecule, said functional groups being composed of at least one selected from a hydroxy group, an amino group, an amide group, a carbonyl group, a carboxyl group, a sulfo group, a phosphate group, an imidazole group and a guanidine group.

Abstract: An organic/inorganic composite hydrogel can be prepared only through mixing at a room temperature and that has high modulus of elasticity and a self-supporting property that allows a shape to be maintained in water, and a method produces the hydrogel. A hydrogel forming composition that is capable of forming a hydrogel having a self-supporting property, includes: a water-soluble organic polymer having an organic acid structure, an organic acid salt structure, or an organic acid anion structure; a silicate salt; a dispersant for the silicate salt; and a compound having or generating divalent or higher valent positive charge; a hydrogel formed of the composition, and a method for producing the hydrogel.

Abstract: In order to provide g-C3N4 capable of being simply and easily handled, a g-C3N4 film is produced by heating, as a starting material, a compound represented by X+mYm?, wherein X+ is a guanidium ion or the like ion, and Ym? is an anion, to vaporize the compound or its reactant, and depositing the compound or the reactant over a surface of a base material heated, the surface carrying negative electric charges or having ? electrons, so that the compound or the reactant is polymerized on the base material to generate g-C3N4.

Abstract: An ionic liquid can disperse graphene at a high concentration. The ionic liquid can be represented by general formula (1): in which R1 and R5 may be the same or different and each independently represents a substituted or unsubstituted C1-7 linear or branched alkyl group; R2 is represented by formula (2): in which R6 and R7 may be the same or different and each independently represents a C1-4 linear or branched alkylene group, and m represents an integer of 1-5; R3 and R4 may be the same or different and each independently represent a hydrogen atom, substituted or unsubstituted C1-4 linear or branched alkyl group; X? represents a counter ion; and n represents 0-30.

Abstract: A radiation dosimetry gel is excellent in heat resistance, and a radiation dosimeter includes the radiation dosimetry gel as a material for measuring a radiation dose. A radiation dosimetry gel includes a water-soluble organic polymer (A) having an organic acid salt structure or an organic acid anion structure, a silicate (B), and a dispersant (C) for the silicate, and a radiation dosimeter includes the radiation dosimetry gel as a material for measuring a radiation dose.

Abstract: A radiation dosimetry gel is excellent in heat resistance, and a radiation dosimeter includes the radiation dosimetry gel as a material for measuring a radiation dose. A radiation dosimetry gel includes a water-soluble organic polymer (A) having an organic acid salt structure or an organic acid anion structure, a silicate (B), and a dispersant (C) for the silicate, and a radiation dosimeter includes the radiation dosimetry gel as a material for measuring a radiation dose.

Abstract: An adhesive resin composition includes an expandable sticky polymer having a structure derived from a Meldrum's acid derivative, or a Meldrum's acid derivative represented by the following general formula (1) and an adhesive resin.

Abstract: There is provided a method for bonding together hydrogels by interposing a polyalkylene glycol between the gel surfaces to be bonded together of hydrogels. A method for bonding together hydrogels of the same type or different types, the method including: interposing a polyalkylene glycol between gel surfaces to be bonded together of the hydrogels and joining together the gel surfaces.

Abstract: An organic/inorganic composite hydrogel can be prepared only through mixing at a room temperature and that has high modulus of elasticity and a self-supporting property that allows a shape to be maintained in water, and a method produces the hydrogel. A hydrogel forming composition that is capable of forming a hydrogel having a self-supporting property, includes: a water-soluble organic polymer having an organic acid structure, an organic acid salt structure, or an organic acid anion structure; a silicate salt; a dispersant for the silicate salt; and a compound having or generating divalent or higher valent positive charge; a hydrogel formed of the composition, and a method for producing the hydrogel.

Abstract: Provided is a hydrogel which includes water as the main component at a high water content and has mechanical strength suitable for practical use and which exhibits high transparency and self-healing and shape-retaining properties. Also provided are both a material for the hydrogel and a novel polyionic dendrimer. A polyionic dendrimer which includes a hydrophilic linear polymer as the core and polyester dendrons attached to both terminals of the linear polymer and in which cationic groups are bonded to the surfaces of the dendrons, the cationic groups being selected from the group consisting of guanidine group, thiourea group, and isothiourea group; a material for a hydrogel, which includes the polyionic dendrimer and clay; and a hydrogel prepared using the material.

Abstract: There is provided a hydrogel having a self-supporting property that can be produced only through mixing at room temperature, and there is provided a method by which the hydrogel can be manufactured by using industrially easily available raw materials. A hydrogel-forming composition that is capable of forming a hydrogel having a self-supporting property, the hydrogel-forming composition characterized by including: a water-soluble organic polymer having an organic acid salt structure or an organic acid anion structure; a silicate salt; and a dispersant for the silicate salt, having a weight average molecular weight of 200 to 20,000 and having hydrolysis resistance.

Abstract: There is provided a self-supporting hydrogel that can be produced only through mixing at room temperature and that has a high mechanical strength. A hydrogel forming composition that is capable of forming a hydrogel having a self-supporting property, the hydrogel forming composition characterized by including: a water-soluble organic polymer having an organic acid salt structure or an organic acid anion structure; a silicate salt; a dispersant for the silicate salt; and a polyhydric alcohol, and having an extremely high mechanical strength.

Abstract: In order to provide g-C3N4 capable of being simply and easily handled, a g-C3N4 film is produced by heating, as a starting material, a compound represented by X+mYm?, wherein X+ is a guanidium ion or the like ion, and Ym? is an anion, to vaporize the compound or its reactant, and depositing the compound or the reactant over a surface of a base material heated, the surface carrying negative electric charges or having ? electrons, so that the compound or the reactant is polymerized on the base material to generate g-C3N4.

Abstract: There is provided a self-supporting hydrogel that can be produced only through mixing at room temperature and that has a high mechanical strength. A hydrogel forming composition that is capable of forming a hydrogel having a self-supporting property, the hydrogel forming composition characterized by including: a water-soluble organic polymer having an organic acid salt structure or an organic acid anion structure; a silicate salt; a dispersant for the silicate salt; and a polyhydric alcohol, and having an extremely high mechanical strength.

Abstract: There is provided a hydrogel having a self-supporting property that can be produced only through mixing at room temperature, and there is provided a method by which the hydrogel can be manufactured by using industrially easily available raw materials. A hydrogel-forming composition that is capable of forming a hydrogel having a self-supporting property, the hydrogel-forming composition characterized by including: a water-soluble organic polymer having an organic acid salt structure or an organic acid anion structure; a silicate salt; and a dispersant for the silicate salt, having a weight average molecular weight of 200 to 20,000 and having hydrolysis resistance.

Abstract: There is provided a method for bonding together hydrogels by interposing a polyalkylene glycol between the gel surfaces to be bonded together of hydrogels. A method for bonding together hydrogels of the same type or different types, the method including: interposing a polyalkylene glycol between gel surfaces to be bonded together of the hydrogels and joining together the gel surfaces.

Abstract: An ionic liquid can disperse graphene at a high concentration. The ionic liquid can be represented by general formula (1): in which R1 and R5 may be the same or different and each independently represents a substituted or unsubstituted C1-7 linear or branched alkyl group; R2 is represented by formula (2): in which R6 and R7 may be the same or different and each independently represents a C1-4 linear or branched alkylene group, and m represents an integer of 1-5; R3 and R4 may be the same or different and each independently represent a hydrogen atom, substituted or unsubstituted C1-4 linear or branched alkyl group; X? represents a counter ion; and n represents 0-30.