Results 71 to 80 of about 17,166 (245)

Polimerização de estireno utilizando compostos organolantanídeos ativados por MAO

Química Nova, 2006
In an attempt to improve the performance of organolanthanide catalysts we investigated the use of the industrially important cocatalyst methylaluminoxane (MAO) to activate organolanthanide compounds in olefin polymerization. The catalytic systems LnBrCp2(
Alessandra de Souza Maia, Josué Garcia Quini, Renata Diana Miotti, Wanda de Oliveira   +3 more
doaj   +1 more source

Thermally Stable, Latent Olefin Metathesis Catalysts [PDF]

, 2011
Highly thermally stable N-aryl, N-alkyl N-heterocyclic carbene (NHC) ruthenium catalysts were designed and synthesized for latent olefin metathesis. These catalysts showed excellent latent behavior toward metathesis reactions, whereby the complexes were ...
Fedorov, Alexey, Grubbs, Robert H., Keitz, Benjamin K., Thomas, Renee M.   +3 more
core   +3 more sources

Metronidazole‐Loaded Cyclodextrin Nanogels for Antibacterial Therapy and Microbiota Regulation in Periodontitis

Advanced Healthcare Materials, EarlyView.
A methacrylamide β‐cyclodextrin‐based nanogel (MACD nGel) is developed to load the antimicrobial drug Metronidazole (MNZ) for topical delivery for the treatment of periodontitis. It is demonstrated that cyclodextrin nanogel (nGel) loaded with metronidazole provides an efficient drug delivery route but also has potential clinical applications and offers
Yanjing Ji, Ruichen Zhang, Dongyi Xu, Patrick C. A. van der Wel, Alessia Lasorsa, Guotai Li, Fangze Guo, Qihui Zhou, Patrick van Rijn   +8 more
wiley   +1 more source

Preparation of Pincer Hafnium Complexes for Olefin Polymerization

Molecules, 2019
Pincer-type [Cnaphthyl, Npyridine, Namido]HfMe2 complex is a flagship among the post-metallocene catalysts. In this work, various pincer-type Hf-complexes were prepared for olefin polymerization.
Su Jin Kwon, Jun Won Baek, Hyun Ju Lee, Tae Jin Kim, Ji Yeon Ryu, Junseong Lee, Eun Ji Shin, Ki Soo Lee, Bun Yeoul Lee   +8 more
doaj   +1 more source

Dinickel Bisphenoxyiminato Complexes for the Polymerization of Ethylene and α-Olefins [PDF]

, 2012
Dinuclear nickel phenoxyiminato olefin polymerization catalysts based on rigid p-terphenyl frameworks are reported. Permethylation of the central arene of the terphenyl unit and oxygen substitution of the peripheral rings ortho to the aryl–aryl linkages ...
Agapie, Theodor, Day, Michael W., Radlauer, Madalyn R.   +2 more
core   +1 more source

Intramolecular C−H Activation of a Bisphenolate(benzene)-Ligated Titanium Dibenzyl Complex. Competing Pathways Involving α-Hydrogen Abstraction and σ-Bond Metathesis [PDF]

, 2010
A titanium dibenzyl complex featuring a ligand with two phenolates linked by a benzene-1,3-diyl group was found to undergo thermal decomposition to give toluene and a cyclometalated dimeric complex. The thermal decomposition followed first-order kinetics
Bercaw, John E., Golisz, Suzanne R., Labinger, Jay A.   +2 more
core   +2 more sources

Triazine‐Trione Thermosets with High Processability for Scaffold Applications in Bone Tissue Engineering

Advanced Healthcare Materials, EarlyView.
Novel photo‐clickable triazine‐trione thermosets can be shaped and cured under mild conditions, including room and physiological temperatures. These materials are biocompatible and support osteogenic differentiation of bone marrow–derived mesenchymal stem cells on their surface.
Åshild Johansen, Shuntaro Yamada, Daniel J. Hutchinson, Mohammed A. Yassin, Samih Mohamed‐Ahmed, Cecilie Gjerde, Michael Malkoch, Kamal Mustafa   +7 more
wiley   +1 more source

Atomistic simulation of olefin polymerization reaction by organometallic catalyst: significant role of microscopic structural dynamics of (pyridylamido) Hf(IV) complex in catalytic reactivity

Frontiers in Chemistry
Understanding the microscopic catalytic mechanism of the olefin polymerization reaction is crucial for the rational design of next-generation catalysts.
Kentaro Matsumoto, Nana Misawa, Shuhei Kanesato, Masataka Nagaoka, Masataka Nagaoka, Masataka Nagaoka, Masataka Nagaoka   +6 more
doaj   +1 more source

A Tri‐Culture Heart‐on‐a‐Chip Platform With iPSC‐Derived Cardiac Cells for Predictive Cardiotoxicity Testing

Advanced Healthcare Materials, EarlyView.
This study presents the first entirely isogenic heart‐on‐chip, unifying cardiomyocytes, fibroblasts, and endothelial cells from a single iPSC source. The platform reveals a critical biological insight: the endothelium actively shields cardiac tissue from drug‐induced toxicity, challenging the predictive accuracy of conventional, avascular models for ...
Karine Tadevosyan, Jose Yeste, Mar Alvarez, Denise Marrero, Laura Casado‐Medina, Yvonne Richaud‐Patin, Olalla Iglesias García, Jagoda Litowczenko‐Cybulska, Alba Morillas Garcia, Anton Guimerà, Xavi Illa, Rosa Villa, Angel Raya   +12 more
wiley   +1 more source

Studies on chain shuttling polymerization reaction of nonbridged half-titanocene and bis(phenoxy-imine) Zr binary catalyst system [PDF]

Royal Society Open Science, 2019
In this contribution, olefin block copolymers were produced via chain shuttling polymerization (CSP), using a new combination of catalysts and a chain shuttling agent (CSA) diethylzinc (ZnEt2).
Qinwen Xu, Rong Gao, Dongbing Liu
doaj   +1 more source