Results 111 to 120 of about 17,166 (245)

Transition Metal Catalysis on Olefins: Some Considerations Relative to Migratory Insertion

CHIMIA, 2001
Olefin migratory insertion into a metal–hydrogen or a metal–carbon bond is an ubiquitous step in olefin coordination catalysis by transition metal complexes. When the catalytic system has element(s) of chirality, and when the two carbon atoms of
Giambattista Consiglio
doaj  

Nanozymes Integrated Biochips Toward Smart Detection System

Advanced Science, EarlyView.
This review systematically outlines the integration of nanozymes, biochips, and artificial intelligence (AI) for intelligent biosensing. It details how their convergence enhances signal amplification, enables portable detection, and improves data interpretation.
Dongyu Chen, Wang Zheng, Zhihui Zhang, Shenping Yu, Xinxin Hang, Han Wu, Xiao‐Wei Xiang, Wei Mu, Yanli Jiao, Zaizai Dong, Lingqian Chang   +10 more
wiley   +1 more source

Modeling and Simulation of Olefin Polymerization at Microstructure Level [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2008
A new model based on a combination of the polymeric multigrain and multilayer models has been developed to predict the polymerization rate, particle growth, morphology, effective parameters on broadening of the molecular weight distribution, number and ...
Ali Dashti, Ahmad Ramazani S.A.
doaj  

L'alkylidénolyse des oléfines catalysée par les complexes des métaux de transition Alkylidenolysis of Olefins Catalysed by Transition-Metal Complexes

Oil & Gas Science and Technology, 2006
Une grande variété de complexes de métaux de transition, homogènes ou hétérogènes, sont susceptibles de provoquer la scission des doubles et triples liaisons carbone-carbone.
Chauvin Y., Commereuc D.
doaj   +1 more source

Beyond Traditional RAFT Polymerization: Emerging Strategies and Future Perspectives; A Third Update

Advanced Science, EarlyView.
This review explores recent advances in the past five years for non‐traditional RAFT polymerization, focusing on new activation strategies, sustainable depolymerization, and integration with automated and AI‐driven synthesis. Together, these innovations advance polymer chemistry and reveal how the pieces of the non‐traditional RAFT puzzle are steadily ...
Vianna F. Jafari, James L. Grace, Jiajia Li, Joji Tanaka, Glen R. Jones, Athina Anastasaki, Wei You, Jian Zhu, Masami Kamigaito, Cyrille Boyer, Greg G. Qiao   +10 more
wiley   +1 more source

Dual Chemical Looping/Catalytic Process for Alkylation of Benzene With Ethane and Propane Yielding Ethylbenzene and Cumene Over Copper‐Containing Mordenite

Angewandte Chemie, EarlyView.
We report a dual chemical looping/catalytic process coupling alkane dehydrogenation with aromatic alkylation over Cu‐mordenite, yielding up to 25% alkylated aromatics with >95% selectivity per cycle. In situ NMR, FTIR spectroscopy, and DFT show alkylation proceeds via a π‐bound Cu(I)–olefin intermediate and Brønsted acid sites.
Florent J. Dubray, Yu‐Hsun Wang, Mikalai A. Artsiusheuski, Jiawei Guo, Rene Verel, Ambarish Kulkarni, Jeroen A. van Bokhoven, Vitaly L. Sushkevich   +7 more
wiley   +2 more sources

Cyclic Ruthenium-Alkylidene Catalysts for Ring-Expansion Metathesis Polymerization [PDF]

, 2008
A series of cyclic Ru-alkylidene catalysts have been prepared and evaluated for their efficiency in ring-expansion metathesis polymerization (REMP). The catalyst structures feature chelating tethers extending from one N-atom of an N-heterocyclic carbene (
Boydston, Andrew J., Gorodetskaya, Irina A., Grubbs, Robert H., Kornfield, Julia A., Xia, Yan   +4 more
core   +1 more source

Nickel‐Catalyzed Twofold Conjunctive Coupling via Philicity‐Alternating Radical Relay

Advanced Science, EarlyView.
Herein, we disclose a nickel‐catalyzed twofold conjunctive coupling that enables a four‐component assembly involving an activated alkene, a 1,3‐enyne, and both alkyl and aryl halides. Multiple C–C bonds are selectively constructed through a philicity‐alternating radical relay and the selective radical capture by the nickel catalyst.
Ji Hwan Jeon, Da Hye Kim, Gun Ha Kim, Gyuhwan Sim, Jan‐Uwe Rohde, Byunghyuck Jung, Sangwon Seo, Sung You Hong   +7 more
wiley   +1 more source

Hidden Diradical: Conformational Switch for Solvatochromic NIR Emission With Unity Quantum Yield in Thiele's Hydrocarbon

Angewandte Chemie, EarlyView.
Halogen substitution controls a conformational switch between a folded closed‐shell and a flat singlet‐diradical conformer in an air‐stable Thiele‐diradical. This conformational switch allows for near‐unity photoluminescence quantum yield with a large Stokes shift, solvatochromism, and a long‐lived excited state.
Matteo Bevilacqua, Mattia Reato, Federico Cilento, Claudia Graiff, Sabrina Antonello, Luca Schio, Alessandro Aliprandi, Cristina Tubaro, Lorenzo Franco, Martina Dell'Angela, Dominik Munz, Marco Baron   +11 more
wiley   +2 more sources

Polyolefin reweaved ultra-micropore membrane for CO2 capture

Nature Communications
High-performance gas separation membranes have potential in industrial separation applications, while overcoming the permeability-selectivity trade-off via regulable aperture distribution remains challenging.
Xiuling Chen, Guining Chen, Cong Xie, Lei Wu, Gongping Liu, Nanwen Li, Wanqin Jin   +6 more
doaj   +1 more source