Results 61 to 70 of about 902,813 (269)

Highly Flowable Nano TiO₂/Porous Organic Polymer (POP) Supports for Efficient Metallocene Catalysts

Nanomaterials, 2020
Porous organic polymers (POPs) have proven to be an efficient support in the olefin polymerization catalyst field. In this paper, nano TiO2 beads were used to modulate the pore structure, bulk density, and surface morphology and flowability of the ...
Xiong Wang, Wenqian Kang, Lin Gao, Guangquan Li, Xuerong Chen, Yi Guo   +5 more
doaj   +1 more source

TEMPO in Solution, Melted, Solid, and Adsorbed on a Silica Surface: A Paramagnetic NMR Study

Chemistry – A European Journal, Volume 32, Issue 1, 2 January 2026.
Paramagnetic species can often be measured with EPR and NMR spectroscopy. This is demonstrated using the important radical TEMPO. All 1H and 13C NMR signals of TEMPO could be recorded and assigned. The impact of TEMPO on the chemical shifts of solvent signals and a phosphine is described.
Ehsan Shakeri, Gabrielle E. Harmon‐Welch, Sara A. C. MacWade, Vladimir I. Bakhmutov, Janet Blümel   +4 more
wiley   +1 more source

Comparative Analysis of Ethylene/Diene Copolymerization and Ethylene/Propylene/Diene Terpolymerization Using Ansa-Zirconocene Catalyst with Alkylaluminum/Borate Activator: The Effect of Conjugated and Nonconjugated Dienes on Catalytic Behavior and Polymer Microstructure

Molecules, 2021
The copolymerization of ethylene‒diene conjugates (butadiene (BD), isoprene (IP) and nonconjugates (5-ethylidene-2-norbornene (ENB), vinyl norbornene VNB, 4-vinylcyclohexene (VCH) and 1, 4-hexadiene (HD)), and terpolymerization of ethylene-propylene ...
Amjad Ali, Muhammad Khurram Tufail, Muhammad Imran Jamil, Waleed Yaseen, Nafees Iqbal, Munir Hussain, Asad Ali, Tariq Aziz, Zhiqiang Fan, Li Guo   +9 more
doaj   +1 more source

Zirconium and titanium complexes supported by tridentate LX2 ligands having two phenolates linked to furan, thiophene, and pyridine donors: precatalysts for propylene polymerization and oligomerization [PDF]

, 2008
Zirconium and titanium complexes with tridentate bis(phenolate)-donor (donor = pyridine, furan and thiophene) ligands have been prepared and investigated for applications in propylene polymerization.
Agapie, Theodor, Bercaw, John E., DiPasquale, Antonio G., Henling, Lawrence M., Rheingold, Arnold L.   +4 more
core   +2 more sources

Preparation and Reactivity of Anionic Iron Sandwich Complex Bearing π‐Phenol Ligand Acting as Proton‐Coupled Electron Transfer Reagent

Chemistry – An Asian Journal, Volume 21, Issue 1, January 2026.
Anionic Fe(I) sandwich complex bearing a π‐phenol ligand with a trifluoroborate substituent with an effective O−H bond dissociation free energy at 40.7 kcal/mol in tetrahydrofuran is prepared, which acts as a proton‐coupled electron transfer reagent for the reduction of organic substrates as well as a Mo(IV) nitride complex, leading to the formation of
Yoshiaki Tanabe, Soma Yamamoto, Shogo Kuriyama, Yoshiaki Nishibayashi   +3 more
wiley   +1 more source

Novel functionalized polyolefins as compatibilizers in polyolefin/polyamide 6 blends and polyethylene/metal hydroxide composites [PDF]

, 2005
Ricinoloxazoline maleinate (OXA) was grafted by melt free radical grafting onto polyolefins and elastomers to produce new compatibilizers for polymer blends.
Hippi, Ulla
core  

Efficient Synthesis of Narrowly Dispersed Brush Copolymers and Study of Their Assemblies: The Importance of Side Chain Arrangement [PDF]

, 2009
Efficient, one-pot preparation of synthetically challenging, high molecular weight (MW), narrowly dispersed brush block copolymers and random copolymers in high conversions was achieved by ring-opening metathesis (co)polymerization (ROMP) of various ...
Grubbs, Robert H., Kornfield, Julia A., Olsen, Bradley D., Xia, Yan   +3 more
core   +1 more source

The Chemistry of Subphthalocyanines: Synthetic Strategies for their Axial, Peripheral, and Remote Postfunctionalization

ChemistryEurope, Volume 4, Issue 1, January 2026.
From axial and peripheral reactivity to remote derivatization, the chemical versatility of subphthalocyanines (SubPcs) renders them ideal scaffolds for the design of advanced functional materials. This review assembles the synthetic toolbox, key reaction conditions, and future challenges in SubPc functionalization, guiding the development of next ...
Marta Gómez‐Gómez, Juan Laforga‐Martín, Jorge Labrador‐Santiago, Jorge Labella, Tomás Torres   +4 more
wiley   +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

Designing organometallic compounds for catalysis and therapy [PDF]

, 2012
Bioorganometallic chemistry is a rapidly developing area of research. In recent years organometallic compounds have provided a rich platform for the design of effective catalysts, e.g. for olefin metathesis and transfer hydrogenation.
Abraha Habtemariam, Aird, Alama, Alama, Alberto, Allardyce, Allen, Allen, Ana M. Pizarro, Anand, Ang, Ang, Anna Louisa Noffke, Arancibia, Barragan, Barry, Barry, Barry, Barry, Bergamo, Bergamo, Betanzos-Lara, Betanzos-Lara, Betanzos-Lara, Brewster, Bugarcic, Bugarcic, Canivet, Carrión, Caruso, Casini, Casini, Casini, Chaplin, Chen, Chen, del Pozo, Desmard, Dorcier, Dorcier, Dougan, Dougan, Dyson, Erxleben, Feng, Fernandez, Filak, Fu, Fu, Fujii, Giannini, Gormen, Gossens, Grau, Grguric-Sipka, Grubbs, Gröger, Guichard, Guo, Guo, Habtemariam, Hambley, Hamels, Hanif, Hanif, Harris, Hartinger, Hashiguchi, Hayes, Hayward, Herman, Hindi, Hogan, Hollmann, Hu, Hull, Ito, Jafarpour, Jennerwein, Jira, Jungwirth, Kandioller, Kisova, Kljun, Kopf, Kopf-Maier, Kopf-Maier, Kopf-Maier, Kopf-Maier, Kröger, Kuninobu, Lee, Leiva, Li, Liu, Liu, Liu, Liu, Liu, Lo, Lo, Lummen, Lutz, Maenaka, Meggers, Meggers, Meggers, Melchart, Melchart, Melchart, Melendez, Mendes, Motterlini, Mross, Novakova, Novakova, Novakova, Noyori, Noyori, Oehninger, Ogo, Ogo, Olliaro, Page, Patiño, Peacock, Peacock, Peacock, Peacock, Pelletier, Peter J. Sadler, Petzold, Petzold, Pitto-Barry, Pitto-Barry, Pizarro, Plazuk, Rocamora-Reverte, Ruiz, Ruppert, Sandoval, Sanford, Sarsam, Schatzschneider, Schmid, Schäfer, Scolaro, Selander, Skinner, Sriskandakumar, Steckhan, Strohfeldt, Suss-Fink, Sweeney, Takebayashi, Tan, Therrien, Therrien, Toney, Top, Top, Top, Trnka, Turel, van der Donk, van Rijt, van Rijt, van Rijt, Vessières, Vougioukalakis, Vougioukalakis, Wang, Wang, Wang, Ward, Williams, Williams, Wong, Wu, Wu, Yabluchanskiy, Yamakawa, Yan, Yano, Yuasa, Zava, Zekri, Zhao, Zoeller   +188 more
core   +1 more source