36 results about "Solution phase synthesis" patented technology

The present process provides a method for synthesizing difficult to make oxide-free nanometals and such as Zn, Sn and Ti and alloys of the period 4 and 5 transition metal elements in a free and reduced state using a solution phase synthesis process. Also provided is a method for stabilizing their associated colloidal metal and alloy dispersions under kinetic control at modest temperatures (<80 degrees Celsius). A solution of an organic reducing agent containing at least two proximal nitrogen atoms is reacted with a separate solution containing one or more metal-organic salts dissolved in the same or different low molecular weight solvent as the reducing agent. The reaction products are stabilized with Lewis bases and Lewis acids and optionally can be concentrated by removing a portion of the volatile low molecular weight solvent by either the use of a partial vacuum or by chemical extraction into another phase.

One aspect of the present invention relates to solution-phase approaches to GPI synthesis. Another aspect of the present invention relates to key building blocks, and syntheses thereof, useful for GPI assembly. Yet another aspect of the invention relates to an automated method for the synthesis of GPIs and fragments thereof.

A multi-element metal chalcogenide and a method for preparing the same are provided. The multi-element metal chalcogenide includes multiple metal elements. A multi-element metal chalcogenide powder is prepared, and all of the multiple metal elements of the multi-element metal chalcogenide are derived from at least one of simple substance powders of the metal elements and one or more alloy powders mixed in accordance with a mole ratio. A solution phase synthesis of the powder of the multi-element metal chalcogenide is then conducted under normal pressure to prepare the multi-element metal chalcogenide. The multi-element metal chalcogenide can be coated to obtain a film or used to make a target and then bombard the target for sputtering a film. In such a way, a selenization process which is conventional in fabricating the semiconductor solar cell is eliminated, thus improving production yield and efficiency.

The invention discloses a preparation method of gold nanorods with large-scale preparation and controllable sizes and dispersibility, and belongs to the multidisciplinary field of polymeric activity polymerization methods, functional polymer molecular design, inorganic crystal growth, etc. The method comprises the steps: (1) taking ionic liquid AMIMCl as solvents, and anhydrous dimethylformamide and N-Methyl pyrrolidone (NMP) as diluents and acid absorbents separately, applying 2-bromoisobutyryl bromide to hydroxyls on a cellulose chain, and converting the hydroxyls into macroinitiators whichcan be used for atom transfer radical polymerization (ATRP); (2) preparing a series of brushy two-block polymers: cellulose-g-[PAA-b-PS] and cellulose-g-[PAA-b-PEG] with a continuous ATRP technology,a technology of combination of ATRP and Click Chemistry and other technologies by taking cellulose-Br as the macroinitiators; and (3) preparing the gold nanorods with oil dispersibility and water dispersibility based on a solution phase synthesis method by taking a certain amount of the brushy two-block polymers as monomolecular templates, chloroauric acid (HAuCl4.3H2O) as precursor compounds andtert-butylamine boron (TBAB) as reducing agents.

Charged and neutral small fluorescent molecules based upon the styryl scaffold are useful as imaging agents for misfolded proteins such as amyloid plaque. Charged molecules are prepared using pyrrolidine catalyzed reactions by solution-phase synthesis. Neutral styryl molecules are prepared using acetic anhydride catalyzed reactions, Horner-Emmons reactions or Wittig reactions.

The present process provides a method for synthesizing difficult to make oxide-free nanometals and such as Zn, Sn and Ti and alloys of the period 4 and 5 transition metal elements in a free and reduced state using a solution phase synthesis process. Also provided is a method for stabilizing their associated colloidal metal and alloy dispersions under kinetic control at modest temperatures (<90 degrees Celsius). A solution of an organic reducing agent containing at least two proximal nitrogen atoms is reacted with a separate solution containing one or more metal-organic salts dissolved in the same or different low molecular weight solvent as the reducing agent. The reaction products are stabilized with Lewis bases and Lewis acids and optionally can be concentrated by removing a portion of the volatile low molecular weight solvent by either the use of a partial vacuum or by chemical extraction into another phase.

The invention discloses a preparation method of a metallic oxide / N-doped carbon nano tube composite material. The preparation method comprises the following steps of: (1) ultrasonically dispersing an N-doped carbon nano tube in a mixed solution of water and alcohol to obtain a solution A; (2) under the condition of stirring, dripping a solution B into the solution A, and stirring to obtain a mixed solution, wherein the solution B is water and / or alcoholic solution containing metal ions; and (3) carrying out solid-liquid separation on the mixed solution, and washing, drying and roasting to obtain the metallic oxide / N-doped carbon nano tube composite material. The invention also provides the composite material obtained through the method and an application thereof. According to the preparation method disclosed by the invention, as a method of solution phase synthesis under the condition of room temperature is adopted, hydrothermal reaction and solvothermal reaction with high temperature and high pressure are avoided, and the composite material with tighter combination of the metallic oxnide and the / N-doped carbon nano tube can be obtained. By adopting the preparation method, the preparation cost is low, the operation is simple, the preparation condition is mild, and the reaction period is also short.