4results about How to "Change the spatial structure" patented technology

The invention discloses a method for synthesizing thiol-protected copper metal nanocluster crystals by secondary reduction self-assembly, and belongs to the technical field of metal nanoclusters. The invention comprises the following steps: mixing an alcohol solution with a copper precursor, adding a coordination agent, adding a thiol ligand, and then adding a NaBH4 alcohol solution for reduction, heating the mixed product after a period of reaction, and then adding a certain amount of NaBH4 alcohol solution for secondary reduction, volatilizing the alcohol solution in the product by rotary evaporation, then adding an organic reagent to wash the mixture, extracting the product with toluene or dichloromethane, and finally cultivating crystals by a volatilization method or a diffusion method to obtain copper nanocluster crystals. The synthesis method of the invention can obtain high-stability copper metal clusters protected by thiol with a special spatial structure, and solves the problems of unstable products and difficult crystallization in the synthesis of thiol-protected copper metal nanoclusters.

The utility model provides a kind of financial bill management storage device, it is related to bill management equipment field, including outer frame, circulation structure, storage box and sealing structure, the sealing structure is arranged on outer frame, the circulation structure includes sprocket, chain, the bottom of the storage box is equipped with clamping groove, the clamping groove is detachably installed on the clamping plate below;The sealing structure includes sealing plate, and the sealing plate is fixed encapsulation by hot-pressing in the mouth portion of storage box, and the utility model significantly reduces manual participation step by chain conveying and automatic hot-pressing encapsulation, improves bill batch storage efficiency, especially suitable for handling a large number of financial vouchers;Storage box is extremely convenient to load and unload, and it is convenient to load bill, take out sealed bill box to file, or replace damaged box.

The invention relates to a cooling agent and a preparation method thereof, and relates to the field of food additives, and the cooling agent comprises the following components in parts by mass: 40-60 parts of a freshener, 1-3 parts of an emulsifier, 30-40 parts of long-chain alkyl modified starch, 20-30 parts of sulfonated chitosan, 0.4-0.8 part of a cross-linking agent, 5-10 parts of a compound cooling improver, 1-3 parts of an antioxidant and 0.5-1 part of an anti-light agent. The preparation method comprises the following steps: preparing a core material emulsion from a freshener, an emulsifier and a compound cool taste improver, preparing a long-chain alkyl modified starch solution, and preparing a mixed solution from sulfonated chitosan, an antioxidant and an anti-light agent; preparing a cross-linking agent solution; adding the core material emulsion into the long-chain alkyl modified starch solution while stirring to obtain an emulsion; adding the mixed solution into the emulsion while stirring, adding a cross-linking agent solution, and stirring for reaction after adding to obtain a suspension; and centrifuging, washing and drying the suspension to obtain the cooling agent. The cooling effect and stability of the cooling agent can be improved.

The application provides an organic electroluminescent doping material and an organic electroluminescent device, the organic electroluminescent doping material has a structure shown in formula I, and after the organic electroluminescent doping material is used in the organic electroluminescent device, the starting voltage of the device is reduced, and the luminous efficiency and the service life of the device are improved.