Classifications

• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
  • C01G1/00—Methods of preparing compounds of metals not covered by subclasses C01B, C01C, C01D, or C01F, in general
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B82—NANOTECHNOLOGY
  • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
  • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
  • C01B13/14—Methods for preparing oxides or hydroxides in general
  • C01B13/32—Methods for preparing oxides or hydroxides in general by oxidation or hydrolysis of elements or compounds in the liquid or solid state or in non-aqueous solution, e.g. sol-gel process
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
  • C01G1/00—Methods of preparing compounds of metals not covered by subclasses C01B, C01C, C01D, or C01F, in general
  • C01G1/02—Oxides
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
  • C01P2004/00—Particle morphology
  • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
  • C01P2004/13—Nanotubes
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
  • C01P2004/00—Particle morphology
  • C01P2004/60—Particles characterised by their size

Definitions

• the present invention relates to a nanotube which also has an acidic / metal power of a transition metal.
• Non-patent document 2 (Non-patent document 2).
• Patent Document 1 JP 2004-26509 A
• Patent Document 2 JP 2004-250797
• Patent Document 3 Patent No. 3560333
• Non-patent literature l Nano Letters, 2 (1), 17-20, 2002
• Non-Patent Document 2 Chem. Commun., 262-263, 2002
• Non-Patent Document 3 J. Colloid Interface Sci., 273, 394-399, 2004
• Nanotubes made of transition metals have useful properties, and therefore, various researchers have studied the production of nanotubes.
• the conventional method for synthesizing metal oxide nanotubes based on the sol-gel method is limited to specific metals such as silicon, titanium, zirconium, etc. (Non-patent Document 1), and a two-step complex reaction. It is a thing that is inferior and versatile. Therefore, it was impossible to produce nanotubes made of transition metal oxides.
• Non-patent Document 2 the method of synthesizing metal oxide nanotubes by the solution method has been very versatile for many transition metals other than limited metals such as zinc.
• an object of the present invention is to provide a nanotube comprising a transition metal oxide and a simple method for producing the nanotube.
• this peptide fat and a fine hollow fiber having a transition metal force As a result of intensive studies to solve the above-mentioned problems, the present inventors have used this peptide fat and a fine hollow fiber having a transition metal force as a self-molded shape and sintered it at a high temperature to thereby obtain a fine hollow shape.
• a transition metal oxide tube is formed in a single step reaction, and the present invention has been made.
• the present invention is an epoch-making discovery that it has been found that nanotubes having a strong transition metal acidity that has been desired in the past can be produced by a very simple method.
• transition metal oxide nanotubes of the present invention can be used in industrial fields such as electronics, information and electronics as nanoelectronic components and nanomagnetic materials.
• the cage shape of the fine hollow fiber of the present invention is formed by coexisting a peptide lipid and a transition metal ion in water.
• This peptide lipid is represented by the general formula RCO (NHCH CO) OH.
• R is a hydrocarbon group having 6 to 18 carbon atoms, preferably a side chain having 2 or less carbon atoms.
• V may be a straight chain hydrocarbon.
• This hydrocarbon group may be saturated or unsaturated. In the case of unsaturation, it is preferred to contain no more than 3 double bonds.
• n an integer of 1 to 3.
• the glycine residue bonded to the hydrocarbon group with a peptide bond plays a distinctive role in the present invention.
• This glycine forms a hydrogen bond called a polyglycine (II) type structure. (Crick, FHC; Rich, A. Nature 1955, 176, 780-781), it is considered to have a hollow fiber-like structure. Even if this glycine residue is replaced with another amino acid, only a fibrous structure is formed under normal conditions, and a hollow fibrous structure is not formed as in the case of using the glycine residue in the present invention.
• the transition element is a metal of 21 Sc to 3 Zn, 39 Y to 48 Cd, and 57 La to 8 G Hg, preferably manganese, iron, cobalt, nickel, copper, zinc, silver , Palladium, gold, or platinum. These may be used alone or as a mixture of two or more, but it is preferable to use a single product.
• the saddle shape of the fine hollow fiber is instantly formed when the peptide lipid and the transition metal ion coexist in water.
• the peptide lipid is first dissolved in water.
• a base By adding a base to the peptide lipid, a carboxylate-one is formed at the end of the lipid.
• the bases include alkali metal hydroxides (sodium hydroxide, lithium hydroxide, potassium hydroxide, etc.), tetraalkyl ammonium hydroxides (tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide). Relatively strong bases such as hydroxides are suitable.
• the peptide lipid concentration at this time is preferably 1 to 50 milmol Z liter.
• the solvent is not limited to water, water is the most preferable in the test results at this time.
• any structure can be used as long as it is a precursor capable of transition metal ions in water.
• the simplest are salts of transition metals, and transition metal salts such as hydrochloric acid, sulfuric acid, nitric acid, and acetic acid can be used.
• the fibrous material is collected and air-dried or vacuum-dried to obtain fine hollow fibers that are stable in the air.
• the hollow hollow fiber cage has the following formula in which a peptide lipid carboxylate-ion and a transition metal ion are bound.
• This vertical hollow fiber type has a layer with a thickness of about 4.4 nm so that the transition metal can be coordinated on the outside and the peptide lipid can be coordinated on the inside.
• the hollow fiber is formed by surrounding the hollow part. As a result, the thickness of the tube is about 20-50 nm.
• the average hollow fiber has an average diameter of about 10 to 1000 nm and an average length of about 1 to: LOO / z m.
• the obtained hollow hollow fiber mold is sintered at 300 to 600 ° C. for about 5 hours while flowing a small amount of air at a flow rate of about lOOmlZ.
• a nanotube having an acid-solid power of the transition metal is obtained, and the size of the nanotube has an average diameter of about 10 to: LOOOnm and an average length of about 1 to: LOOm, as in the cage type. It can be easily observed using a normal optical microscope. This structure can be confirmed in more detail by using a laser microscope, an atomic force microscope, and an electron microscope.
• reaction solution was washed thoroughly with 50 ml of 10% by weight aqueous citrate solution, 50 ml of 4% by weight aqueous sodium hydrogen carbonate solution and 50 ml of water, and then concentrated under reduced pressure to give N- (glycylglycine benzyl ester) as a white solid.
• 0.50 g (60% yield) of decane carboxamide was obtained.
• 0.42 g (l mmol) of this compound was dissolved in 100 ml of dimethylformamide, and 0.5 g of 10 wt% noradium Z carbon was added as a catalyst to perform catalytic hydrogen reduction.
• FIG. 1 is a diagram showing an infrared absorption spectrum of a copper oxide nanotube.
• FIG. 2 is a transmission electron micrograph of copper oxide nanotubes.
• FIG. 3 is a diagram showing an infrared absorption spectrum of acid-manganese nanotubes.
• FIG. 4 is a transmission electron micrograph of acid-manganese nanotubes.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Nanotechnology (AREA)
• Condensed Matter Physics & Semiconductors (AREA)
• Composite Materials (AREA)
• General Physics & Mathematics (AREA)
• Materials Engineering (AREA)
• Crystallography & Structural Chemistry (AREA)
• Physics & Mathematics (AREA)
• Inorganic Compounds Of Heavy Metals (AREA)
• Oxygen, Ozone, And Oxides In General (AREA)
• Peptides Or Proteins (AREA)

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Publications (1)

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Citations (4)

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• 2005
  • 2005-02-24 JP JP2005048975A patent/JP4719848B2/ja not_active Expired - Fee Related
  • 2005-09-12 US US11/667,880 patent/US20070292338A1/en not_active Abandoned
  • 2005-09-12 EP EP05782384.1A patent/EP1894890B1/en not_active Expired - Lifetime
  • 2005-09-12 WO PCT/JP2005/016732 patent/WO2006090499A1/ja not_active Ceased

Patent Citations (4)

Non-Patent Citations (8)

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