http://www.runyvmat.com/As the industry leader in phosphine ligands and catalysts for homogeneous catalysis, Solvay offers a range of phosphorus compounds used in a breadth of applications and markets. Our scalable phosphorus chemistry meets the unique requirements of reactions that are crucial to several manufacturing processes across markets and applications, including petrochemicals, life sciences, flavors and fragrances, agrochemicals, fine chemicals, and plastics and other polymers. And do you what is Phosphine Ligands? Phosphines are a three-valent phosphorus compound and act as a "soft" σ-donating ligand with an unshared electron pair. This gives solubilization and stabilization to organometallic complexes by forming complexes with various transition metal species including latter-period transition metals and others, and is also used for controlling the reactivity and selectivity of the transition metal promoted reactions. Electron density and bulkiness of phosphine ligands are greatly related to the reactivity of their forming metal complexes. Generally, the phosphine ligands with high electron density increase the reactivity of oxidative addition from a metal center, and their bulkiness improves the reductive elimination. For example, trialkylphosphines especially tert-butyl or cyclohexyl group substituted phosphines show the highest electron density while the electron density of triarylphosphines and phosphite are sequentially decreasing. On the other hand, as an index of the bulkiness of phosphine ligands, that of monodentate phosphine ligands shows the cone angle (θ) while bidentate phosphine ligands show the bite angle (ω). As the angle of the phosphine ligands is wider, their steric effect is greater and they are regarded as more bulky phosphine ligands. A monodentate phosphine ligand of tri(o-tolyl)phosphine, and bidentate phosphine ligands of 1,1'-bis(diphenylphosphino)ferrocene and Xantphos are known as representative bulky phosphine ligands. There are many different kinds of Phosphine Ligands, such as Chiral Phosphine Ligands, Chelated Phosphine Ligands, Biaryl Phosphine Ligand, Trisubstituted Phosphine Ligands and Other Phosphine Ligands. Homogeneous catalysis is an efficient alternative to its heterogeneous counterpart, and enables access to certain molecules that are not accessible through heterogeneous catalysis. Our high-performance phosphine ligands provide endless customization opportunities for catalytic processes. Phosphorus chemistry offers substantial diversity of structure, tunability and thermal stability, which leads to its use in many essential industries and an abundance of applications. A majority of Solvay's phosphorus technologies are available in liquid or solution form, which facilitates ease of handling and safe product stewardship. Solids are available if preferred. Produced via industry-recognized manufacturing processes, our phosphine ligands and catalysts can be manufactured at any scale. Solvay offers expertise and manufacturing wherewithal at any phase of the value chain, but specializes in developing ligand solutions from the initial R&D stage all the way to industrial-scale production and distribution. Except for Phosphine Ligands, there are also many other material Intermediate and Function Materials like Catalyst including Homogeneous Catalyst and Olefin Copolymerization Catalyst. posted an update 1년, 7개월전
http://www.focusfur.com/Steel Cabinets using advanced technology can be multi-functional depending on the needs of the installation area such as personal property storage, forwarding function such as transportation of goods and parcels in residential areas or storing and transferring documents/papers internally in the office area.
In a rapidly growing society, where all of us are influenced and driven by technology, everything around us is gradually becoming intelligent to meet the needs of life as well as remain friendly with new people and the environment. And usually a Locker can be deivided into Steel Storage Locker and Electronic Locker.
With smart cars and smart phones, Home Steel Cabinets are in as an emerging trend. A versatile cabinet can provide optimal convenience for us. So what does a Smart Locker cabinet do?
There are three of the many solutions for Filing Cabinets receiving a lot of attention about:
Storage of personal belongings
Except for a locker cabinet, a home shelf is also widely used as a storage similar tothe locker. No matter how much technology might advance or home renovations get smarter and more modern, there are a few things that can never be replaced, let alone eliminated altogether. For instance – shelves.
Shelves are one of that vital household equipment that have been used since the beginning of time. Shelves are a must in every house because they help you keep the place neat and tidy by storing various things like books, clothes, and countless other items that would be otherwise scattered on the floor. Besides providing storage space and keeping the house organized, a proper shelving system also allows you to decorate and beautify your house by proudly displaying stunning adornments and ornaments that are normally stashed away in the attic.
While the first use of shelf dates as far back as the 8th Century and comprised of a simple slab pivoted to a vertical surface, today there are literally countless types of shelves available to the common man. As for Household Shelf, we often use Compact Shelving while for Heavy Duty Shelf, lots of Steel Shelving and large shelves are preferred.