Halogen-Substituted 2,6-Bis(imino)pyridyl Iron and Cobalt Complexes:  Highly Active Catalysts for Polymerization and Oligomerization of Ethylene

2003 ◽  
Vol 22 (21) ◽  
pp. 4312-4321 ◽  
Author(s):  
Yaofeng Chen ◽  
Ruifang Chen ◽  
Changtao Qian ◽  
Xicheng Dong ◽  
Jie Sun
Keyword(s):  
Cobalt Complexes ◽  
Highly Active

Highly active dinuclear cobalt complexes for solvent-free cycloaddition of CO2 to epoxides at ambient pressure

2019 ◽  
Vol 55 (57) ◽  
pp. 8274-8277 ◽  
Author(s):  
Zafar A. K. Khattak ◽  
Hussein A. Younus ◽  
Nazir Ahmad ◽  
Habib Ullah ◽  
Suleman Suleman ◽  
...  
Keyword(s):  
Ambient Pressure ◽  
Coupling Reaction ◽  
Cobalt Complexes ◽  
Solvent Free ◽  
Highly Active

Dinuclear Co-based catalysts are used for the coupling reaction of epoxides and CO2 in the presence of a cocatalyst.

scholarly journals Thermally stable and highly active cobalt precatalysts for vinyl-polyethylenes with narrow polydispersities: integrating fused-ring and imino-carbon protection into ligand design

2016 ◽  
Vol 40 (9) ◽  
pp. 8012-8023 ◽  
Author(s):  
Fang Huang ◽  
Wenjuan Zhang ◽  
Yang Sun ◽  
Xinquan Hu ◽  
Gregory A. Solan ◽  
...  
Keyword(s):  
Ligand Design ◽  
Cobalt Complexes ◽  
Thermally Stable ◽  
Highly Active ◽  
Fused Ring

Finely tuned cobalt complexes, upon activation with either MAO or MMAO, exhibited high activities up to 80 °C and produced highly linear vinyl-polyethylenes.

Bis(imino)pyridine Iron and Cobalt Complexes Immobilized into Interlayer Space of Fluorotetrasilicic Mica: Highly Active Heterogeneous Catalysts for Polymerization of Ethylene

2007 ◽  
Vol 36 (8) ◽  
pp. 1004-1005 ◽  
Author(s):  
Hideki Kurokawa ◽  
Michiko Matsuda ◽  
Kenji Fujii ◽  
Yoshiyuki Ishihama ◽  
Tsutomu Sakuragi ◽  
...  
Keyword(s):  
Heterogeneous Catalysts ◽  
Interlayer Space ◽  
Cobalt Complexes ◽  
Highly Active

scholarly journals Highly active cationic cobalt(II) hydroformylation catalysts

Science ◽  
2020 ◽  
Vol 367 (6477) ◽  
pp. 542-548 ◽  
Author(s):  
Drew M. Hood ◽  
Ryan A. Johnson ◽  
Alex E. Carpenter ◽  
Jarod M. Younker ◽  
David J. Vinyard ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Cobalt Complexes ◽  
Steric Effects ◽  
Rhodium Catalysts ◽  
Degradation Reactions ◽  
Highly Active ◽  
Alkene Isomerization

The cobalt complexes HCo(CO)4 and HCo(CO)3(PR3) were the original industrial catalysts used for the hydroformylation of alkenes through reaction with hydrogen and carbon monoxide to produce aldehydes. More recent and expensive rhodium-phosphine catalysts are hundreds of times more active and operate under considerably lower pressures. Cationic cobalt(II) bisphosphine hydrido-carbonyl catalysts that are far more active than traditional neutral cobalt(I) catalysts and approach rhodium catalysts in activity are reported here. These catalysts have low linear-to-branched (L:B) regioselectivity for simple linear alkenes. However, owing to their high alkene isomerization activity and increased steric effects due to the bisphosphine ligand, they have high L:B selectivities for internal alkenes with alkyl branches. These catalysts exhibit long lifetimes and substantial resistance to degradation reactions.

scholarly journals Bis(imino)-6,7-dihydro-5H-quinoline-cobalt complexes as highly active catalysts for the formation of vinyl-terminated PE waxes; steps towards inhibiting deactivation pathways through targeted ligand design

RSC Advances ◽  
2021 ◽  
Vol 11 (63) ◽  
pp. 39869-39878
Author(s):  
Mingyang Han ◽  
Zheng Zuo ◽  
Yanping Ma ◽  
Gregory A. Solan ◽  
Xinquan Hu ◽  
...  
Keyword(s):  
Ligand Design ◽  
Cobalt Complexes ◽  
Polymerization Catalysts ◽  
Highly Active

Narrowly dispersed PE waxes with high levels of vinyl functionality are produced using the depicted cobalt polymerization catalysts.

Effect of pomegranate fruit supplementation on performance and various markers in athletes and active subjects: a systematic review

2019 ◽  
pp. 1-15
Author(s):  
Alicja Urbaniak ◽  
Anna Skarpańska-Stejnborn
Keyword(s):  
Vessel Diameter ◽  
Whole Body ◽  
Double Blind Study ◽  
Double Blind ◽  
Physically Active ◽  
Highly Active ◽  
Body Strength ◽  
Rate Of Increase ◽  
Study Designs ◽  
Pomegranate Fruit

Abstract. The aim of the study was to review recent findings on the use of POM supplements in athletes of various disciplines and physically active participants. Eleven articles published between 2010 and 2018 were included, where the total number of investigated subjects was 176. Male participants constituted the majority of the group (n = 155), as compared to females (n = 21). 45% of research described was conducted on athletes, whereas the remaining studies were based on highly active participants. Randomised, crossover, double-blind study designs constituted the majority of the experimental designs used. POM supplementation varied in terms of form (pills/juice), dosage (50 ml–500 ml) and time of intervention (7 days–2 months) between studies. Among the reviewed articles, POM supplementation had an effect on the improvement of the following: whole body strength; feeling of vitality; acute and delayed muscle fatigue and soreness; increase in vessel diameter; blood flow and serum level of TAC; reduction in the rate of increase for HR, SBP, CK and LDH; support in the recovery of post-training CK, LDH, CRP and ASAT to their baseline levels; reduction of MMP2, MMP9, hsCRP and MDA; and increased activity of antioxidant enzymes (glutathione peroxidase and superoxide dismutase). In the majority of reviewed articles POM supplementation had a positive effect on a variety of parameters studied and the authors recommended it as a supplement for athletes and physically active bodies.

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