نتایج جستجو برای: metallocene catalyst
تعداد نتایج: 44388 فیلتر نتایج به سال:
Heterogeneous Ziegler-Natta and homogeneous metallocene catalysts exhibit greatly different active sitenature in olefin polymerization. In our previous study, it was reported that MgCl2-supported titanocenecatalysts can generate both Ziegler-Natta-type and metallocene-type active sites according to the type of activators.The dual active site nature of the supported titanocene catalysts was furt...
Over the last decade, a significant body of research has been developed around the inclusion of a metallocene moiety into known antimalarial compounds. Ferroquine is the most successful of these compounds. Herein, we describe our contribution to metallocene antimalarials. Our approach has sought to introduce diversity sites in the side chain of ferroquine in order to develop a series of ferroqu...
Group 4 metallocene complexes are effective catalysts in the ring-opening copolymerisation of epoxides and anhydrides to afford bio-derived polymers.
The synthesis, structure and reactivity of a new bipy thorium metallocene have been studied. The reduction of the thorium chloride metallocene [η(5)-1,3-(Me(3)C)(2)C(5)H(3)](2)ThCl(2) (1) with potassium graphite in the presence of 2,2'-bipyridine gives the purple bipy metallocene [η(5)-1,3-(Me(3)C)(2)C(5)H(3)](2)Th(bipy) (2) in good yield. Complex 2 has been fully characterized by various spect...
a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...
The exploration of high-efficiency bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen (OER) has long been challenging. rational design a catalyst by constructing heterostructures doping element are possibly expected to achieve it. Herein, the utilization flower-like Fe/C-doped-MoS2/Ni3S2-450 spherical structural materials electrocatalytic HER OER is introduced in thi...
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