69results about How to "Suitable for large-scale synthesis" patented technology

The invention discloses an asymmetric synthesis method of optically pure (R) / (S)-chloroquine. 4-amino-7-chloroquinoline and 5-diethylin-2-pentanone are taken as starting raw materials and are subjected to an asymmetric reductive ammoniation reaction under the catalysis of chiral acid, optically pure chloroquine is obtained, and the spatial configuration of a product is controlled through spatial configuration of the chiral acid. The method adopts simple steps, the raw materials are easy to obtain, the yield is higher, the stereoselectivity is good, the chiral construction cost is relatively lower, the operation is simple, and the method is environment-friendly and suitable for large-scale production.

The invention relates to a high-temperature-resistant sintered supported noble metal catalyst for catalytic oxidation of carbon monoxide and a preparation method thereof. The catalyst is composed of a carrier, an active component and a coating shell layer, and the carrier is TiO 2 or CeO 2 Nanoparticles; the active component is a noble metal Au, Pt or Pd nanoparticle; the active component is loaded on the surface of the carrier; the surface of the carrier nanoparticle and the active component noble metal nanoparticle are coated with a cladding shell, The cladding shell is SiO 2 Shell. The method of the invention is simple, the conditions are mild, the cycle is short, the method is suitable for large-scale synthesis, and has little impact on the environment.

The invention discloses a core-shell quantum dot emitting red light and a synthesis method thereof. The chemical structural formula of the quantum dot is (Cu, In): CdSe / CdSe, wherein the dopant of the core quantum dot of the core-shell quantum dot is The molar weight ratio nCu / nIn is 0.80-1.20 and (nCu+nIn) / nCd is 0.02-0.08. The method for synthesizing core-shell quantum dots provided by the invention uses cadmium salts, indium salts, copper salts and selenides as raw materials, and completes the two-step reaction by one-pot heating in a hydrocarbon medium in the presence of organic ligands. By controlling the molar amount and ratio of each source, the concentration of the ligand, the reaction temperature and time, the first exciton absorption peak wavelength of the core-shell quantum dots is located at 450-475nm, and the emission peak wavelength is located at 610-660nm; the prepared core-shell quantum dots Quantum dots are suitable as red phosphor materials for blue chip-conversion solid-state lighting devices.

The invention discloses a polymer based on fluorinated dithienylethylene derivatives and its application in organic field effect transistors. The structural formula of the polymer based on fluorinated dithienylethylene derivatives is shown in formula I. The synthesis route of the present invention is simple and easy, has few synthesis steps, high yield and is suitable for large-scale synthesis. The mobility and switching ratio of the field effect transistor prepared by using the polymer based on the novel fluorodithiopheneethylene derivative of the present invention as the organic semiconductor layer are relatively high, and the mobility is up to 0.37cm 2 V ‑1 the s ‑1 , the on-off ratios are greater than 10 5 . The polymer of the invention has a good application prospect in organic field effect devices.