Trinuclear alkyl hydrido rare-earth complexes supported by amidopyridinato ligands: synthesis, structures, C–Si bond activation and catalytic activity in ethylene polymerization

2014 ◽  
Vol 43 (38) ◽  
pp. 14450-14460 ◽  
Author(s):  
Dmitry M. Lyubov ◽  
Anton V. Cherkasov ◽  
Georgy K. Fukin ◽  
Sergey Yu. Ketkov ◽  
Andrey S. Shavyrin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Ethylene Polymerization ◽  
Bond Activation ◽  
Rare Earth Complexes

[(Ap9MeLu)3(μ2-H)3(μ3-H)2(CH2SiMe3)(thf)2] was synthesized. For Y and Yb C–Si bond activation occurs affording [(Ap9MeLu)3(μ2-H)3(μ3-H)2(CH2SiMe3)(thf)2] and [(Ap9MeLn)3(μ2-H)3(μ3-H)2(CH2SiH2Ph)(thf)2].

Amido rare-earth complexes supported by an ansa bis(amidinate) ligand with a rigid 1,8-naphthalene linker: synthesis, structures and catalytic activity in rac-lactide polymerization and hydrophosphonylation of carbonyl compounds

2015 ◽  
Vol 39 (2) ◽  
pp. 1083-1093 ◽  
Author(s):  
Marina V. Yakovenko ◽  
Natalia Yu. Udilova ◽  
Tatyana A. Glukhova ◽  
Anton V. Cherkasov ◽  
Georgy K. Fukin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Carbonyl Compounds ◽  
Rare Earth Complexes ◽  
Lactide Polymerization

We report the synthesis of rare-earth amides and their catalytic activity in ROP of lactide.

Dialkyl Rare Earth Complexes Supported by Potentially Tridentate Amidinate Ligands: Synthesis, Structures, and Catalytic Activity in Isoprene Polymerization

2012 ◽  
Vol 2012 (13) ◽  
pp. 2289-2297 ◽  
Author(s):  
Vassily Yu. Rad'kov ◽  
Grigorii G. Skvortsov ◽  
Dmitry M. Lyubov ◽  
Anton V. Cherkasov ◽  
Georgy K. Fukin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Rare Earth Complexes ◽  
Isoprene Polymerization

Bis(alkyl) rare-earth complexes supported by a new tridentate amidinate ligand with a pendant diphenylphosphine oxide group. Synthesis, structures and catalytic activity in isoprene polymerization

2015 ◽  
Vol 44 (37) ◽  
pp. 16465-16474 ◽  
Author(s):  
Aleksei O. Tolpygin ◽  
Tatyana A. Glukhova ◽  
Anton V. Cherkasov ◽  
Georgy K. Fukin ◽  
Diana V. Aleksanyan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
High Activity ◽  
Rare Earth Complexes ◽  
Diphenylphosphine Oxide ◽  
Oxide Group ◽  
Very High ◽  
Isoprene Polymerization

The introduction of a pendant Ph2P(O) group into an amidinate ligand resulted in high 1,4-cis selectivity (96.6%) while maintaining very high activity.

Bis(amido) rare-earth complexes coordinated by tridentate amidinate ligand: synthesis, structure and catalytic activity in the polymerization of isoprene and rac-lactide

RSC Advances ◽  
2016 ◽  
Vol 6 (22) ◽  
pp. 17913-17920 ◽  
Author(s):  
Aleksei O. Tolpygin ◽  
Olesya A. Linnikova ◽  
Tatyana A. Glukhova ◽  
Anton V. Cherkasov ◽  
Georgy K. Fukin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Rare Earth Complexes ◽  
Ligand Synthesis

Rare-earth bis(amides) {2-[Ph2Р(O)]C6H4NC(tBu)N(2,6-Me2C6H3)}Ln(N(SiMe3)2)2 (Ln = Y, Nd, La) coordinated by tridentate amidinate ligand were synthesized, structurally characterized and evaluated as catalysts for isoprene and rac-lactide polymerizations.

Bis(alkyl) rare-earth complexes coordinated by bulky tridentate amidinate ligands bearing pendant Ph2PO and Ph2PNR groups. Synthesis, structures and catalytic activity in stereospecific isoprene polymerization

2016 ◽  
Vol 45 (46) ◽  
pp. 18572-18584 ◽  
Author(s):  
Natalia Yu. Rad'kova ◽  
Aleksei O. Tolpygin ◽  
Vasily Yu. Rad'kov ◽  
Nadia M. Khamaletdinova ◽  
Anton V. Cherkasov ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Rare Earth Complexes ◽  
Isoprene Polymerization

Replacement of Ph2PO group by Ph2PNPh leads to a switch of stereoselectivity from cis-1,4 to trans-1,4.

Rare-earth complexes supported by an ansa-bis(amidinate) ligand with a rigid o-phenylene linker: synthesis, structure, and catalytic activity for polymerization of cyclic esters

2019 ◽  
Vol 48 (32) ◽  
pp. 12193-12198 ◽  
Author(s):  
Fenhua Wang ◽  
Xu Zhao ◽  
Xianfu Meng ◽  
Shaowu Wang
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Coordination Chemistry ◽  
Rare Earth Complexes ◽  
Cyclic Esters

Two types of rare-earth complexes supported by a linked-bis(amidinate) ligand were constructed; their coordination chemistry and catalytic activity were studied.

Synthesis and characterization of dinuclear rare-earth complexes supported by amine-bridged bis(phenolate) ligands and their catalytic activity for the ring-opening polymerization of l-lactide

2016 ◽  
Vol 45 (26) ◽  
pp. 10807-10820 ◽  
Author(s):  
Yu-Lai Duan ◽  
Jia-Xuan He ◽  
Wei Wang ◽  
Jing-Jing Zhou ◽  
Yong Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Rare Earth ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Rare Earth Complexes ◽  
Synthesis And Characterization ◽  
Phenolate Ligands

Neutral rare-earth complexes [M2(L)2(THF)4] have been synthesized. Their activities toward the ring-opening polymerization of l-lactides will be presented.

scholarly journals CO Oxidation Efficiency and Hysteresis Behavior over Mesoporous Pd/SiO2 Catalyst

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 131 ◽  
Author(s):  
Rola Mohammad Al Soubaihi ◽  
Khaled Mohammad Saoud ◽  
Myo Tay Zar Myint ◽  
Mats A. Göthelid ◽  
Joydeep Dutta
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Co Oxidation ◽  
Active Sites ◽  
Bond Activation ◽  
Dissociative Adsorption ◽  
High Catalytic Activity ◽  
Good Catalytic Activity ◽  
Pretreatment Conditions ◽  
Oxidation Efficiency

Carbon monoxide (CO) oxidation is considered an important reaction in heterogeneous industrial catalysis and has been extensively studied. Pd supported on SiO2 aerogel catalysts exhibit good catalytic activity toward this reaction owing to their CO bond activation capability and thermal stability. Pd/SiO2 catalysts were investigated using carbon monoxide (CO) oxidation as a model reaction. The catalyst becomes active, and the conversion increases after the temperature reaches the ignition temperature (Tig). A normal hysteresis in carbon monoxide (CO) oxidation has been observed, where the catalysts continue to exhibit high catalytic activity (CO conversion remains at 100%) during the extinction even at temperatures lower than Tig. The catalyst was characterized using BET, TEM, XPS, TGA-DSC, and FTIR. In this work, the influence of pretreatment conditions and stability of the active sites on the catalytic activity and hysteresis is presented. The CO oxidation on the Pd/SiO2 catalyst has been attributed to the dissociative adsorption of molecular oxygen and the activation of the C-O bond, followed by diffusion of adsorbates at Tig to form CO2. Whereas, the hysteresis has been explained by the enhanced stability of the active site caused by thermal effects, pretreatment conditions, Pd-SiO2 support interaction, and PdO formation and decomposition.

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