Results 51 to 60 of about 1,053 (173)

Testing DFT ability to predict the stereoselectivity of group 4 metallocenes in propylene polymerization [PDF]

Polyolefins Journal, 2014
In this study we have tested the ability of a standard DFT computational protocol to reproduce the experimentally obtained stereoselectivity of 26 different C2-symmetric zirconocene catalysts active in propylene polymerization.
Naeimeh bahri-Laleh, Laura Falivene, Luigi Cavallo   +2 more
doaj   +1 more source

State‐of‐the‐Art and Synthetic Challenges for Hydrosilane Production

Chemistry – A European Journal, EarlyView.
The synthesis of hydrosilanes is currently energy intensive and their recycling is not considered. However, these compounds are important in many industrial fields but also for the valorization of oxygenated waste, towards a circular economy. This review compares the available synthetic routes and highlights the remaining challenges for the production ...
Gabriel Durin, Albane Fontaine, Jean‐Claude Berthet, Thibault Cantat   +3 more
wiley   +1 more source

Metal Cluster Size-Dependent Activation Energies of Growth of Single-Chirality Single-Walled Carbon Nanotubes inside Metallocene-Filled Single-Walled Carbon Nanotubes

Nanomaterials, 2021
By combining in situ annealing and Raman spectroscopy measurements, the growth dynamics of nine individual-chirality inner tubes (8,8), (12,3), (13,1), (9,6), (10,4), (11,2), (11,1), (9,3) and (9,2) with diameters from ~0.8 to 1.1 nm are monitored using ...
Marianna V. Kharlamova, Christian Kramberger   +1 more
doaj   +1 more source

Dinuclear Group 4 Metallocene Catalysts of the Type [(Cp2M)2(μ‐Me)(μ‐C2R)]: Structure‐Activity Relationships in Ethylene Polymerization

Chemistry – A European Journal, EarlyView.
Homo‐ and heterodinuclear group 4 metallocene complexes of the type [(Cp2M)2(μ‐Me)(μ‐C2R)] (M = Ti, Zr) are active catalysts for the polymerization of ethylene in the presence of aluminium‐free activators. The catalytically active species are proposed to have dinuclear character and depending on the type of activator, unique reactivity was observed ...
Hanan Al Hamwi, Mirko Rippke, Anke Spannenberg, Michal Horáček, Jiří Pinkas, Vojtěch Varga, Martin Lamač, Fabian Reiß, Torsten Beweries   +8 more
wiley   +1 more source

Influência da estrutura do catalisador a base de Zirconoceno na estereorregularidade e propriedades do polipropileno formado Influence of Zirconocene structure on polypropylene stereorregularity and properties

Polímeros, 1997
RESUMO: Catalisadores de metalocenos com diferentes simetrias, cocatalisados por metilaluminoxanas (MAO), foram avaliados em diferentes temperaturas de polimerização do propileno.
Mário R. Meneghetti, Madalena C. Forte, Jairton Dupont   +2 more
doaj   +1 more source

Redox‐Active Bisphosphines Based on a W(II)‐Propargyl Complex Backbone

European Journal of Inorganic Chemistry, EarlyView.
Three bisphosphine ligands based on tungsten(II) propargyl‐type alkyne complexes were synthesized and characterized. The methanolate derivative was used as a metalla‐ligand for the preparation of a binuclear bisphosphine‐κ2‐PdCl2 complex. In both cases, IR spectroelectrochemistry (IR‐SEC) measurements revealed a successive process following oxidation ...
Friederike M. Hamann, Dirk Michalik, Martina Beese, Anke Spannenberg, Alexander Villinger, Klaus Neymeyr, Robert Francke, Wolfram W. Seidel   +7 more
wiley   +1 more source

Hydrosilane Chemistry: From Historic First Steps to Modern Applications

European Journal of Inorganic Chemistry, EarlyView.
This review covers the history of hydrosilanes, from their initial discovery to their modern applications. It highlights the pioneering work of chemists like Alfred Stock and Franz Fehér and discusses the modern ways of synthesis and use of hydrosilanes in printed electronics.
Uwe Böhme, Maik Gerwig
wiley   +1 more source

Organic Photodetectors and Sensors for Low‐Light and Infrared Applications

Electron, EarlyView.
This mini review highlights recent advances in organic photodetectors and sensors for low‐light and infrared applications, emphasizing molecular design, device architectures, and interface engineering that improve charge transport, detectivity, speed, and spectral selectivity.
Swarup Biswas, Hyeok Kim
wiley   +1 more source

«Host-guest» complexing of double-walled carbon nanotube with metallocenes

Хімія, фізика та технологія поверхні, 2016
Complex compounds of various types and nature have been widely applied in many fields of science and technology. Complex aggregates based on nanostructures such as nanotubes and other coordination compounds, for example, metallocenes, have unique ...
O. V. Mykhailenko
doaj   +1 more source

Morphology control of clay-mineral particles as supports for metallocene catalysts in propylene polymerization [PDF]

Polyolefins Journal, 2016
Spray dry granulation of clay minerals was studied to obtain clay mineral base support material for metallocene supported olefin polymerization catalysts.
Takao Tayano, Takehiro Sagae, Takashi Atsumi, Hideshi Uchino, Masahide Murata, Tsutomu Sato   +5 more
doaj   +1 more source