2 results about "Butyl lithium" patented technology

The invention discloses a new method for synthesizing dithieno[2,3-b:4',3'-d] silole derivative with the characteristic of an unsymmetrical structure. The method comprises the following steps of: performing bromine and lithium exchange reaction of 4,4'-bromine-2,2,5,5'-tetra(trimethylsilyl)-3,3'-bithiophene serving as a raw material and tertiary butyl lithium in absolute ether, and quenching by using water at the temperature of -50 DEG C to obtain 7,7-dimethyl-2,4,6-tri(trimethylsilyl)-dithieno[2,3-b:4',3'-d]silole in high yield; and quenching by using the water at the temperature of 45 DEG C to obtain 7,7-dimethyl-4,6-bis(trimethylsilyl)-dithieno[2,3-b:4',3'-d]silole in high yield. The synthetic process has operability and is suitable for laboratory-scale preparation, and reaction is performed in the absence of water and oxygen at low temperature.

The invention relates to a porphyrin covalently linked molybdenum disulfide nonlinear nano hybrid material as well as preparation and application of the porphyrin covalently linked molybdenum disulfide nonlinear nano hybrid material, zinc porphyrin is axially coordinated to the surface of layered molybdenum disulfide, and the nonlinear performance of an organic-inorganic hybrid material is enhanced through energy transmission between porphyrin and molybdenum disulfide. The preparation method comprises the following steps: stripping molybdenum disulfide into few layers through butyl lithium, covalently connecting p-aminopyridine to the surface of layered molybdenum disulfide through diazonium salt reaction, and connecting porphyrin with metal zinc coordinated at the center to the surface of p-aminopyridine modified molybdenum disulfide through axial coordination to obtain the porphyrin-molybdenum disulfide hybrid material. The covalent linkage enhances energy transmission between molybdenum disulfide and porphyrin, so that the hybrid material shows enhanced nonlinear optical performance under nanosecond 532 nm.