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Carbohydrate alkyl bonding imidazole type heterocyclic carbene palladium coordination compound as well as preparation method and application thereof

The invention provides a carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound as well as a preparation method and application thereof. A structure of the carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound is shown in a formula I: the formula (1) is shown in the description, wherein R is alkyl, benzyl or aryl,and n is equal to 2 to 10. According to the carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound disclosed by the invention, by using natural chiral compound D-glucose with low cost, easy availability, good water solubility and rich stereochemistry as a chiral source of the carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium coordination compound, under a condition of no additional addition of an alkaline additive, a carbohydrate alkyl bonding imidazole type N-heterocyclic carbene palladium complex I is synthesized by adoptinga quick one-step method and is used as a palladium catalyst for catalyzing C-C coupled reaction, and no-water no-oxygen reaction conditions are overcome, so that a series of fluorene-derived conjugated small molecular functional materials having novel structures are prepared in a high yield manner.
Owner:GANNAN NORMAL UNIV

Fireproof sheet honeycomb ceramic automobile exhaust purification material and preparation method thereof

The invention discloses a fireproof sheet honeycomb ceramic automobile exhaust purification material and a preparation method thereof. The fireproof sheet honeycomb ceramic automobile exhaust purification material is characterized by being prepared from, by weight, 10-15 parts of floating beads, 40-50 parts of cordierite, 1-3 parts of TiO2, 1-3 parts of clay, 4-8 parts of sodium carbonate, 10-15 parts of stearic acid, a proper amount of a 1 mol / L HNO3 solution, 50-60 parts of nanometer aluminum oxide sol, 1-3 parts of 1 mol / L La(NO3)3, 1-2 parts of a 1 mol / L Sr(NO3)2, 0.5-1 part of a 1 mol / L Co(NO3)2, 2-6 parts of a 1 mol / L critic acid and 100-200 parts of deionized water. By means of ZrO2 powder and CrO2 powder, the comprehensive performance of a honeycomb ceramic carrier is enhanced, and the honeycomb ceramic carrier has the advantages of being high in compressive strength, resistant to high temperature, good in chemical stability, high in corrosion resistance and the like; due to the load La-Sr-Co-O catalyst, the automobile exhaust purification efficiency is improved; meanwhile, the honeycomb ceramic carrier is made into the sheet shape, installation and replacement are convenient, meanwhile, the cost is saved, sufficient utilization of resources are promoted, and the current environment-friendly trend is met.
Owner:安庆市花蕾纺织材料有限公司
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