Inorganic zeolite molecular sieve materials are widely used in industry and people's daily life due to their unique functions of adsorption / separation and catalysis. The research team led by Zhang Jian, a researcher at the State Key Laboratory of Structural Chemistry at the Fujian Institute of Material Structure, Chinese Academy of Sciences, was approved by the Ministry of Science and Technology 973 Program, the National Fund Committee Innovation Group Project, the Chinese Academy of Sciences ’Emerging and Cross-cutting Projects, and the Fujian Provincial Outstanding Youth Fund Simulating its unique TO4 tetrahedral framework structure, the designed and synthesized series of metal organic zeolite molecular sieve materials not only have higher specific surface area and excellent pore structure control performance, but also show in the research fields of hydrogen energy storage, carbon dioxide capture and catalysis, etc. Superior performance and potential application prospects. The team used tetrahedral Cu4I4 clusters as the basic building blocks and connected a linear ligand triethylenediamine (dabco) to successfully synthesize a cluster organic framework compound with molecular sieve MTN topology. The structure of the compound contains two types of cage structures, the inner diameter of the cage reaches 2.6nm and 2.0nm respectively, and has a very large pore volume; at the same time, the Cu4I4 cluster is a typical fluorescent light-emitting unit, so the synthesis of the compound is not only a molecular sieve-like The material assembly provides a cluster unit construction mode, and its successful fusion of fluorescence and high pore performance provides new ideas for the development of fluorescent molecular sieve materials. The research work was published in J. Am. Chem. Soc. (2012, 134, 17881-17884). Since the structure of the zeolite molecular sieve is usually a series of TO4 (T = Si4 +, Al3 +, P5 + etc) tetrahedral centers, the tetrahedral coordinated metal center (Zn2 +, Co2 +, Cu +, etc.) is usually used in the design of synthetic zeolite molecular sieve structures. The range of choices is very limited. For example, a high-coordinate metal center can be used to construct a 4-connected zeolite molecular sieve topology, which will effectively broaden the choice of metal centers and further expand the functional applications of such materials. The team used coordination chemistry methods to block the two coordination points of the six-coordinate metal center by using the carboxyl chelation coordination mode, and the remaining four coordination points can form a twisted tetrahedral coordination mode. Along this line of thought, the researchers effectively combined such a six-coordinated but four-linked cobalt acetate center with a tetradentate boron imidazole ligand, and successfully achieved the design of two molecular sieve-like compounds with molecular sieve ACO and ABW topologies, respectively. synthesis. The research work was published in Chem. Eur. J. (2012, 18, 11876-11879). In addition, the research group has also made a series of progress in the gas adsorption and catalytic performance of molecular sieve-like materials. Using the structural design idea of ​​constructing 6-coordination but 4-connection, a chiral porous material with triple interpenetrating diamond topology network was synthesized using 5-carboxybenzimidazole and Ni. At 0 degrees Celsius and 1 atmospheric pressure, the The compound adsorbed CO2 at 94.74 cm3 / g. It is worth mentioning that this compound has a CO2 adsorption capacity of 57.7 cm3 / g at 0 degrees Celsius and 0.1 atmospheres, which is superior to the CO2 adsorption capacity of other chiral porous materials reported so far. The research work was published in ChemSusChem (2012, 5, 1597-1601). The researchers also used the doping method to adjust the performance of molecular sieve materials, replacing the tetrahedral Cu + center part with the Co2 + center in the ZIF-67 structure. The molecular aspect shows more excellent performance. The research work was published in J. Mater. Chem. (2012, DOI: 10.1039 / C2JM35602C). Metal organic zeolite molecular sieve material There are nice quality and price Paddle board .Accessories including everything you need to enjoy your day on the water including: your board, collapsible aluminum paddle, safety leash , hand pump , waterproof bag for essentials such as cell phone and keys, and an upgraded backpack to hold everything. WEIHAI HITEAM TECHNOLOGY CO.,LTD , https://www.paddleboardmanufacturer.com
Fujian Zedong Institute of Zeolite Molecular Sieve Materials Research Progress
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