Abstract:
The present invention relates to a novel potassium organo-1H-1,2,3-triazole-4-yltrifluoroborate derivative and a manufacturing method thereof. The novel potassium organo-1H-1,2,3- triazole-4-yltrifluoroborate derivative according to the present invention can be usefully used in the manufacture of various kinds of organo 1,2,3-triazole through a general carbon-carbon coupling reaction utilizing a metallic catalyst such as Suzuki-Miyaura coupling, and can be applied to an organic combination reaction, an optical organic material manufacture, medicine production, a medical diagnosis material, a biocompatible material and a bioactive natural material. The manufacturing method for the potassium organo-1H-1,2,3-triazole-4-yltrifluoroborate derivative according to the present invention can manufacture the stable potassium organo-1H-1,2,3-triazole-4-yltrifluoroborate derivative with a single reaction. Accordingly, a manufacturing process is fast, convenient, efficient and economic.
Abstract:
A method for preparation of a silica aerogel having high transparency at a low cost by a simplified preparation process is provided, and a silica aerogel having high transparency prepared by the method is provided. A method for preparation of a silica aerogel having high transparency comprises: a first step of injecting a silica sol into a sealed polypropylene container and gelling the silica sol to form a wet gel; a second step of adding 2-propanol into the polypropylene container to age the wet gel; a third step of solvent-exchanging alcohol presenting in the aged wet gel into xylene; a fourth step of modifying a surface of the solvent-exchanged wet gel with HMDSZ(hexamethyldisilazane); a fifth step of cleaning the surface-modified wet gel with xylene, and drying the cleaned wet gel; and a sixth step of heat-treating the dried wet gel.