Results 61 to 70 of about 13,033 (225)

Selective ethylene trimerization by titanium complexes bearing phenoxy-imine ligands: NMR and EPR Spectroscopic studies of the reaction intermediates [PDF]

, 2014
The catalyst systems (FI)TiCl₃/MAO (FI = phenoxyimine ligand with an additional aryl–O–CH₃ donor) display exceptionally high activity in selective ethylene trimerization.
Bryliakov, Konstantin P., Ma, Jing, Redshaw, Carl, Semikolenova, Nina V., Soshnikov, Igor E., Talsi, Evgenii P., Zakharov, Vladimir A., Zhao, Ke Qing, Zhao, Ke-Qing   +8 more
core   +2 more sources

Defect engineering for highly efficient and stable perovskite top cells for Si tandems

Bulletin of the Korean Chemical Society, EarlyView.
Defect passivation in wide‐bandgap perovskites is essential for enabling high‐efficiency and stable perovskite/Si tandem solar cells. Bulk, surface, and buried‐interface passivation strategies focus on suppressing nonradiative recombination, ion migration, and halide segregation, thereby clarifying critical design principles for next‐generation tandem ...
Ju Yeong Hong, Young Seon Yoon, Jin Young Kim   +2 more
wiley   +1 more source

(μ-Di-tert-butylsilanediolato)bis[bis(η5-cyclopentadienyl)methylzirconium]

Acta Crystallographica Section E: Crystallographic Communications, 2019
The reaction of t-Bu2Si(OH)2 with two equivalents of Cp2Zr(CH3)2 produces the title t-Bu2SiO2-siloxide bridged dimer, [Zr2(CH3)2(C5H5)4(C8H18O2Si)] or [Cp2Zr(CH3)]2[μ-t-Bu2SiO2] (1), where one methyl group is retained per zirconium atom. The same product
David J. Berg, Leah Gajecki, Hunter Hill, Brendan Twamley   +3 more
doaj   +1 more source

Kinetic resolution of racemic {alpha}-olefins with ansa-zirconocene polymerization catalysts: Enantiomorphic site vs. chain end control [PDF]

, 2006
Copolymerization of racemic {alpha}-olefins with ethylene and propylene was carried out in the presence of enantiopure C1-symmetric ansa metallocene, {1,2-(SiMe2)2({eta}5-C5H-3,5-(CHMe2)2)({eta}5-C5H3)}ZrCl2 to probe the effect of the polymer chain end ...
Bercaw, John E., Byers, Jeffery A.
core   +1 more source

UHMWPE/SBA-15 nanocomposites synthesized by in situ polymerization [PDF]

, 2016
Different nanocomposites have been attained by in situ polymerization based on ultra-high molecular weight polyethylene (UHMWPE) and mesoporous SBA-15, this silica being used for immobilization of the FI catalyst bis [N-(3-tert-butylsalicylidene)-2,3,4,
Adewole, Amoli, Ana E. Ferreira, Baier, Bakshi, Beck, Beloshenko, Bento, Bryliakov, Campos, Campos, Campos, Carlini, Cerrada, Cerrada, Chen, Cui, Cybo, Dangsheng, Deng, Dong, Dorigato, Díez-Pascual, Ernesto Pérez, Guo, Henri Cramail, Ianuzzi, Ivanchev, Ivanchev, Iwashita, João P. Lourenço, Kaminsky, Katti, Klimova, Kresge, Kurek, Kurtz, M. Rosário Ribeiro, Makio, Makio, Maria L. Cerrada, Mitani, Oliver, Olmos, Panchenko, Park, Quinn, Ribeiro, Sandaroos, Severn, Sinfrônio, Spiegelberg, Sánchez, Talebi, Tjong, Vicente Lorenzo, Wypych, Xu, Zhang, Zhao, Zohuri   +60 more
core   +3 more sources

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

Unlocking the Functionalization and Reactivity of Ethylene Bridges in [2.2]Paracyclophanes: Strategies and Challenges

European Journal of Organic Chemistry, EarlyView.
Bridging the gap. Beyond deck functionalization, the ethylene bridges of [2.2]paracyclophanes offer a largely unexploited reactivity landscape. This review showcases strategies to functionalize these bridges and leverage them to build novel cyclophane architectures.
Rongyu Sun, Tamara Ye, Laurent Micouin, Erica Benedetti   +3 more
wiley   +1 more source

Metallocene Based Polyolefin Nanocomposites [PDF]

Materials, 2014
One of the most efficient and versatile ways to synthesize polyolefin nanocomposites is the in-situ polymerization of olefins in the presence of nano particles by metallocene catalysts. Metallocene/methylaluminoxane (MAO) catalysts are soluble in hydrocarbons and therefore they can be absorbed perfectly in solution onto the surface of particles or ...
openaire   +2 more sources

Overcoming Challenges in 3D Printing of Polyolefins and Their Composites: A Review on Strategies for Improved Printability and Performance

Polymer Engineering &Science, EarlyView.
This review integrates the molecular fundamentals, key challenges, and mitigation strategies in polyolefin 3D printing, focusing on shrinkage, warpage, and adhesion control. It highlights material design approaches using recycled polyolefins and functional fillers to improve printability, mechanical properties, and sustainability in additive ...
Malik Hassan, Philip McMorran, Marwan Eid, Julia Blair, Amar K. Mohanty, Manjusri Misra   +5 more
wiley   +1 more source

Silicoaluminates as “support activator” systems in olefin polymerization processes [PDF]

, 2010
In this work we report the polymerization behaviour of natural clays (montmorillonites, MMT) as activating supports. These materials have been modified by treatment with different aluminium compounds in order to obtain enriched aluminium clays and to ...
Alba Carranza, María Dolores, Carmejo, C., Cuenca, T., Tabernero, Vanessa, Terreros, P.   +4 more
core   +2 more sources