ORGANICALLY MODIFIED FINE PARTICLES
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Accused Products
Abstract
A technique for bonding an organic group with the surface of fine particles such as nanoparticles through strong linkage is provided, whereas such fine particles are attracting attention as materials essential for development of high-tech products because of various unique excellent characteristics and functions thereof. Organically modified metal oxide fine particles can be obtained by adapting high-temperature, high-pressure water as a reaction field to bond an organic matter with the surface of metal oxide fine particles through strong linkage. The use of the same condition enables not only the formation of metal oxide fine particles but also the organic modification of the formed fine particles. The resulting organically modified metal oxide fine particles exhibit excellent properties, characteristics and functions.
18 Citations
75 Claims
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1-31. -31. (canceled)
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32. A process for producing organically modified metal oxide nanoparticles, which comprises:
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reacting an organic modifying agent with the surface of a metal oxide nanoparticle in a reaction field of high-temperature, high-pressure water to form organically modified metal oxide nanoparticles wherein an optionally substituted or unsubstituted hydrocarbon group is bonded to the surface of said nanoparticle through a linkage selected from the group consisting of a covalent bond, an ether bond, an ester bond, a bond through an N atom, a bond through an S atom, a metal-C—
bond, a metal-C═
bond, and a metal-(C═
O)—
bond. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A process for producing organically modified metal oxide nanoparticles, which comprises:
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producing metal oxide nanoparticles in the coexistence of an organic modifying agent in a supercritical hydrothermal synthesis reaction field, thereby forming organically modified metal oxide nanoparticles wherein an optionally substituted or unsubstituted hydrocarbon group is bonded to the surface of said nanoparticle through a linkage selected from the group consisting of a covalent bond, an ether bond, an ester bond, a bond through an N atom, a bond through an S atom, a metal-C—
bond, a metal-C═
bond, and a metal-(C═
O)—
bond. - View Dependent Claims (46, 47)
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48. A process for producing organically modified metal oxide nanoparticles, which comprises:
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subjecting a metallic compound to a hydrothermal reaction in a reaction field of high-temperature, high-pressure water to form metal oxide nanoparticles; and reacting an organic modifying agent with the surface of the resulting metal oxide nanoparticle to form organically modified metal oxide nanoparticles wherein an optionally substituted or unsubstituted hydrocarbon group is bonded to the surface of said nanoparticle through a linkage selected from the group consisting of a covalent bond, an ether bond, an ester bond, a bond through an N atom, a bond through an S atom, a metal-C—
bond, a metal-C═
bond, and a metal-(C═
O)—
bond. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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61. A process for recovering or collecting metal oxide nanoparticles, which comprises:
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reacting an organic modifying agent (organic modifier) with the surface of a metal oxide nanoparticle in the reaction field of high-temperature, high-pressure water to bond an optionally substituted or unsubstituted hydrocarbon group to the surface of said nanoparticle through a linkage selected from the group consisting of a covalent bond, an ether bond, an ester bond, a bond through an N atom, a bond through an S atom, a metal-C—
bond, a metal-C═
bond, and a metal-(C═
O)—
bond, whereby the surface of said nanoparticle is organically modified; and(1) precipitating the resultant metal oxide nanoparticles dispersed in an aqueous solution and then recovering metal oxide nanoparticle sediments; (2) transferring the resultant metal oxide nanoparticles, dispersed in an aqueous solution, into an organic solvent phase and recovering a metal oxide nanoparticle-containing organic layer;
or(3) collecting the resultant metal oxide nanoparticles from the interface between organic and aqueous phases. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75)
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Specification