35 results about "1,5-Cyclooctadiene" patented technology

A method is provided for forming iridium oxide (IrOx) nanotubes. The method comprises: providing a substrate; introducing a (methylcyclopentadienyl)(1,5-cyclooctadiene)iridium(I) precursor; introducing oxygen as a precursor reaction gas; establishing a final pressure in the range of 1 to 50 Torr; establishing a substrate, or chamber temperature in the range of 200 to 500 degrees C.; and using a metalorganic chemical vapor deposition (MOCVD) process, growing IrOx hollow nanotubes from the substrate surface. Typically, the (methylcyclopentadienyl)(1,5-cyclooctadiene)iridium(I) precursor is initially heated in an ampule to a first temperature in the range of 60 to 90 degrees C., and the first temperature is maintained in the transport line introducing the precursor. The precursor may be mixed with an inert carrier gas such as Ar, or the oxygen precursor reaction gas may be used as the carrier.

Iridium oxide (IrOx) nanowires and a method forming the nanowires are provided. The method comprises: providing a growth promotion film with non-continuous surfaces, having a thickness in the range of 0.5 to 5 nanometers (nm), and made from a material such as Ti, Co, Ni, Au, Ta, polycrystalline silicon (poly-Si), SiGe, Pt, Ir, TiN, or TaN; establishing a substrate temperature in the range of 200 to 600 degrees C.; introducing oxygen as a precursor reaction gas; introducing a (methylcyclopentadienyl)(1,5-cyclooctadiene)iridium(I) precursor; using a metalorganic chemical vapor deposition (MOCVD) process, growing IrOx nanowires from the growth promotion film surfaces. The IrOx nanowires have a diameter in the range of 100 to 1000 Å, a length in the range of 1000 Å to 2 microns, an aspect ratio (length to width) of greater than 50:1. Further, the nanowires include single-crystal nanowire cores covered with an amorphous layer having a thickness of less than 10 Å.

Solution-phase (e.g., homogeneous) or surface-immobilized (e.g., heterogeneous) electrode-driven oxidation catalysts based on iridium coordination compounds which self-assemble upon chemical or electrochemical oxidation of suitable precursors and methods of making and using thereof are. Iridium species such as {[Ir(LX)x(H2O)y(μ-O)]zm+}n wherein x, y, m are integers from 0-4, z and n from 1-4 and LX is an oxidation-resistant chelate ligand or ligands, such as such as 2(2-pyridyl)-2-propanolate, form upon oxidation of various molecular iridium complexes, for instance [Cp*Ir(LX)OH] or [(cod)Ir(LX)] (Cp*=pentamethylcyclopentadienyl, cod=cis-cis,1,5-cyclooctadiene) when exposed to oxidative conditions, such as sodium periodate (NaIO4) in aqueous solution at ambient conditions.

Disclosed is a method for efficiently and highly selectively producing L-2-amino-4-(hydroxymethylphosphinyl)-butanoic acid, which is useful as a herbicide, through a catalytic asymmetric synthesis reaction. Specifically disclosed is a method for producing L-2-amino-4-(hydroxymethylphosphinyl)-butanoic acid which is characterized in that a dehydroamino acid is subjected to an asymmetric hydrogenation by using a rhodium catalyst represented by the formula (2) below and having an optically active cyclic phosphine ligand, and then the resulting product is subjected to hydrolysis:[Rh(R4)(L)]X  (2)[where R4 represents 1,5-cyclooctadien or norbornadien; L represents a substance represented by the following formula (6):(wherein R5 and R8 respectively represent a C1-4 alkyl group; R6 and R7 respectively represent hydrogen atom or hydroxyl group; and Y represents a group selected from groups represented by the following formula (7):(where Me represents methyl group)).].

Disclosed is a method capable of forming a ring-shaped compound (1) using a compound that contains at least one cyclohexane ring part and has on each end a benzene ring part that has a halogen atom in the presence of a nickel compound (bis(1,5-cyclooctadiene)nickel or the like) and wherein organic ring groups that contain a cyclohexane ring, benzene ring and the like are bonded continuously. If, thereafter, the cyclohexane ring part of the ring-shaped compound (1) is converted to a benzene ring part, a desired carbon nanoring may be obtained. By this means, a carbon nanoring formed from a ring-shaped compound in which a desired number of organic ring groups are bonded continuously may be produced efficiently with a small number of steps.

The invention provides a methanol gasoline power promoter. The methanol gasoline power promoter consists of isooctanol, diethoxyethylamine, 1,5-cyclooctadiene, 2-acetylbenzofuran, propargyl alcohol, n-propyl alcohol, zinc naphthenate, dinonylnaphthalene sulfonic acid, di(polyoxyethylene) fatty amine and pentamethyldiethylenetriamine. A preparing method of the methanol gasoline power promoter comprises the following steps: a, adding the isooctanol, the diethoxyethylamine, the 1, 5-cyclooctadiene and the 2-acetylbenzofuran into a reactor, and carrying out airtight ultrasonic agitation reaction at a temperature of 60-62 DEG C for 40-50 minutes; b, mixing the n-propyl alcohol, the zinc naphthenate and the dinonylnaphthalene sulfonic acid, and agitating for 15-25 minutes; c, sequentially adding the propargyl alcohol, a mixture in the step b, the di(polyoxyethylene) fatty amine and the pentamethyldiethylenetriamine into a mixture in the step a, agitating at a temperature of 33-35 DEG C for 20-25 minutes and cooling to obtain the methanol gasoline power promoter.

The invention relates to the field of noble metal catalyst synthesis, and discloses a method for preparing chloro(1,5-cyclooctadiene)iridium(I) dimer. The method includes the step that under the oxygen-free condition, an iridium-containing and chlorine-containing compound, aldehyde, 1,5-cyclooctadiene and solvent are subjected to a contact reaction. Traditionally used reactants (alcohol) are abandoned, and new reactants (aldehyde) are used, so the yield of chloro(1,5-cyclooctadiene)iridium(I) dimer can be as high as 75% in short reaction time. Consumption of water and 1,5-cyclooctadiene is low, waste liquid treatment loss is greatly reduced, and production cost is reduced.

In the present invention, in the presence of a nickel compound (bis(1,5-cyclooctadiene)nickel, etc.), a compound containing at least one cyclohexane ring portion with benzene rings to which halogen atoms are attached at both ends is used , a cyclic compound (1) in which organic ring groups including a cyclohexane ring and a benzene ring are continuously bonded can be formed. Then, the desired carbon nanoring can be obtained by converting the cyclohexane ring part of the cyclic compound (1) into a benzene ring part. According to this, a carbon nanoring composed of a cyclic structure compound in which a desired number of organic ring groups are continuously bonded can be efficiently produced in a short process.