Due to its rich structure and unique properties, polyoxometalates have received extensive attention in the fields of medicinal chemistry, materials chemistry and catalytic science. The Chemical Review of the American Chemical Society and the Review of the Chemical Society of the Royal Society of Chemistry in 1998 and 2012 (Chem. Rev., 1998, 98, 1-390; Chem. Soc. Rev., 2012, 41 , 7325–7648) reviews the synthesis, structure, properties, and applications of polyoxometallates, including their use in catalytic reactions (Chem. Rev., 1998, 98, 113–170; Chem. Rev., 1998 , 98, 171–198; Chem. Rev., 1998, 98, 199–217 and Chem. Soc. Rev., 2012, 41, 7572–7589). In 2014, the “Chemical Review†reviewed the oxidation of light alkane catalyzed by polyoxometalates (Chem. Rev., 2014, 114, 981–1019). In the review article mentioned above, except for Chem. Soc. Rev. (2012, 41, 7572–7589) reviewing one of the recent research hotspots—catalyzed oxygen production by poly-acids, the rest of the review articles only reviewed traditional catalytic reactions. Types, namely acid-type reactions and oxidative reactions, have little attention to other types of reactions. Actually polyoxometalates have multiple catalytically active sites and can catalyze not only the acid-type and oxidative-type reactions, but also alkali-type and reduced-type reactions. It is particularly important that the modification of polyoxometalates by means of metal substitution can catalyze many other types of reactions, such as coupling reactions, cyclopropylation reactions, and hydrogen/oxygen reactions that have received much attention in recent years. Wait. State Key Laboratory of Structural Chemistry, State Key Laboratory of Structural Chemistry, National Institute of Advanced Materials Science and Technology, Chinese Academy of Sciences, Yang Guoshao's Task Force in National Outstanding Young Scientists Fund, National Fund Research Fundamental Research Project Key Project, Ministry of Science and Technology's "973" Program, and Chinese Academy of Sciences' Introduction of Foreign Talents and 100 Talents Program Under the funding of the research, the catalytic reaction of polyoxometalates was carried out, and it was found that high-nuclear zirconium cluster-substituted polyoxometalates played an important role in the catalytic oxidation of thioethers (J. Am. Chem. Soc., 2014, 136, 7637). Recently, a research review article titled Recent Advances in Polyoxometalate-Catalyzed Reactions (Chem. Rev., 2015, DOI: 10.1021/cr500390v) was also invited to be published in the “Chemical Reviewâ€. This review takes the reaction type as the main line. Starting from the analysis of the potential catalytic sites of polyoxometalates, combined with the latest reported examples, not only the latest developments of the conventional reaction types are systematically described, but also a comprehensive review of the new catalysis of polyoxometalates. The type of reaction not only increases the understanding of polyoxometalate catalysts, but also provides new ideas for its application in catalytic reactions. This review also looks at the trends in the development of polyoxometalate catalysis. Yang Guoji's group focused on hydrothermal chemistry based on the absence of metal oxygenated cluster units as precursors. He not only pioneered the synthesis method of metal-oxygenated clusters that lack substitutions, but also proposed the idea of ​​missing site structure guidance. The core of this idea is that the missing position of the missing metal oxygenation cluster can act as a structure-directing agent to induce the aggregation of the second metal in the absence of the metal, thereby constructing novel metal oxygenated clusters, cluster aggregates, and cluster polymers. Wait. By introducing metal ions of different properties at the missing sites, the structure and properties of different substituted metal oxygen clusters can be controlled. Relevant representative results include: J. Am. Chem. Soc. (2014, 136, 7637; 2010, 132, 15102); Angew. Chem. Int. Ed. (2008, 47, 3909, cover article; 2009, 48, 7176, inside cover article); Chem. Commun. (2007, 1858; 2008, 570; 2012, 48, 9658) and Chem. Eur. J. (2007, 13, 10030; 2008, 14, 9223; 2011, 17, 13032; 2014, 20, 17324; 2015, 21, 2315) and so on. The research group also made important progress in the study of secondary substitution reactions of oxygenated clusters. For the first time, a three-dimensional oxygenated cluster backbone based on a tetra-cadmium-substituted Cd4Ge8V10O46 cluster unit and a GeO4 tetrahedron was obtained for the first time (J. Am. Chem. Soc., 2014 136, 5065). Due to a series of important advances made in the field of substituted oxygen cluster synthesis methodology, a review article was invited for Chem. Soc. Rev. (2012, 41, 7623). In addition, Yang Guolu also edited and published the monograph “The Chemistry of Oxygen Clusters†(Science Press, 2012; Funded by the National Science and Technology Academic Publications Foundation), and in the book Modern Inorganic Synthetic Chemistry (Elsevier, 2011) edited by Mr. Xu Ruren. Authored a Synthetic Chemistry of Cluster Compounds.
Blue color is one of the main color for PE Tarpaulin. It is HDPE woven cloth+ LDPE laminated on both sides, The lamination is blue color. The Blue PE Tarpaulin is one of the most popular color in Europe, USA, Asia, and Middle east market.
For the Blue PE tarp, It is usually used as Storage cover, Utility cover, Pool cover, Machinery cover, Canopy, Irrigation dams, Poultry curtain, Construction, Scaffolding covers, Roofing material, Outdoor and home covering, Leisure sheet, Green house, Trucks boats and tools covers, Agricultural use, Hay cover, Pond liner, Sports equipment cover, Temporary shelter house, Refugee tent, etc. It is tear-proof, water-proof, washable, anti-rot, UV-stabilized. Pls check below the blue PE tarpaulin pictures
Blue PE Tarpaulin Blue PE Tarpaulin,Blue PE Tarpaulin Sheet,Blue Poly Tarpaulin,Blue Waterproof PETarp HEBEI OHONG PLASTIC CO. LTD. , https://www.tarpaulin-factory.com
As to the Blue PE tarpaulin, we can make any sizes available, subject to customer`s order, and any shape can be made as per customer`s
design. The weight we can make are usually 48-300gsm. If you have
demand, welcome to contact us, we will also be there to support you in
high quality, reasonable price, good service and fast delivery, etc