Synthesis of a [(π-Cyano-nacnac)Cp]zirconium Complex and Its Remote Activation for Ethylene Polymerization

2010 ◽  
Vol 29 (22) ◽  
pp. 6104-6110 ◽  
Author(s):  
Alan R. Cabrera ◽  
Yanika Schneider ◽  
Mauricio Valderrama ◽  
Roland Fröhlich ◽  
Gerald Kehr ◽  
...  
Keyword(s):  
Ethylene Polymerization ◽  
Zirconium Complex

Ethylene Polymerization by a New Zirconium Complex

2011 ◽  
Vol 214 ◽  
pp. 699-703
Author(s):  
Zheng Zai Cheng ◽  
Yu Jing Nie ◽  
Xiao Chao Yan ◽  
Rui Lei ◽  
Su Su Lin
Keyword(s):  
Molecular Weight ◽  
Reaction Temperature ◽  
Ethylene Polymerization ◽  
Average Molecular Weight ◽  
Zirconium Complex ◽  
Melting Points ◽  
Ligand Complex ◽  
Dichloromethane Solution ◽  
Gel Permeation ◽  
Very High

Novel zirconium complex C2 has been prepared by treatment of the ligand complex C1 with ZrCl4•2THF in dichloromethane solution. The complex C1 and C2 were characterized by 1H-NMR and IR. Activated by MAO, Complex C2 displays very high activity for ethylene polymerization under the reaction temperature of 30～80°C and the viscosity-average molecular weight of polyethylene is more than 3.50×104 when reaction temperature is no more than 60°C.The molecular-weight distribution measured by gel permeation reached 2.3.High melting points measured by DSC indicates that the polyethylene produced by complex C2 is high linearity and high crystallinity.

Immobilization of a zirconium complex bearing bis(phenoxyketimine) ligand on MCM-41 for ethylene polymerization

Polymer ◽  
2005 ◽  
Vol 46 (24) ◽  
pp. 11093-11098 ◽  
Author(s):  
Shangtao Chen ◽  
Cunyue Guo ◽  
Lei Liu ◽  
Hong Xu ◽  
Jinxiang Dong ◽  
...  
Keyword(s):  
Ethylene Polymerization ◽  
Zirconium Complex ◽  
Mcm 41

Post-Metallocenes: A New Bis(salicylaldiminato) Zirconium Complex for Ethylene Polymerization

1999 ◽  
Vol 28 (12) ◽  
pp. 1263-1264 ◽  
Author(s):  
Shigekazu Matsui ◽  
Makoto Mitani ◽  
Junji Saito ◽  
Yasushi Tohi ◽  
Haruyuki Makio ◽  
...  
Keyword(s):  
Ethylene Polymerization ◽  
Zirconium Complex

Prepare of Novel Zirconium Complex and Catalytic Performance for Ethylene Polymerization

2011 ◽  
Vol 179-180 ◽  
pp. 1091-1095 ◽  
Author(s):  
Zheng Zai Cheng ◽  
Yu Jing Nie ◽  
Xiao Chao Yan ◽  
Rui Lei ◽  
Su Su Lin
Keyword(s):  
Molecular Weight ◽  
Reaction Temperature ◽  
Ethylene Polymerization ◽  
Average Molecular Weight ◽  
Catalytic Performance ◽  
Zirconium Complex ◽  
Melting Points ◽  
Ligand Complex ◽  
Dichloromethane Solution ◽  
Very High

Novel zirconium complex 2 has been prepared by treatment of the ligand complex 1 with ZrCl4•2THF in dichloromethane solution. The complex 1 and 2 were characterized by 1H-NMR and IR. Activated by MAO, Complex 2 displays very high activity for ethylene polymerization under the reaction temperature of 40～80 °C and the viscosity-average molecular weight of polyethylene is more than 3.0×104 when reaction temperature is no more than 60°C.The molecular-weight distribution measured by gel permeation reached 2.50.High melting points measured by DSC indicates that the polyethylene produced by complex 2 is high linearity and high crystallinity.

Preparation of spherical MgCl2-supported bis(phenoxy-imine) zirconium complex for ethylene polymerization

2007 ◽  
Vol 263 (1-2) ◽  
pp. 86-92 ◽  
Author(s):  
Renwei Xu ◽  
Dongbing Liu ◽  
Shibo Wang ◽  
Na Wang ◽  
Bingquan Mao
Keyword(s):  
Ethylene Polymerization ◽  
Zirconium Complex

Colorimetric Determination of Fluoride in Drinking Groundwater using a Polymeric Zirconium Complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline

2013 ◽  
Vol 12 (7) ◽  
pp. 460-465
Author(s):  
Sameer Amereih ◽  
Zaher Barghouthi ◽  
Lamees Majjiad
Keyword(s):  
Drinking Water ◽  
Detection Limit ◽  
Complex Formation ◽  
Molar Absorptivity ◽  
Colorimetric Determination ◽  
Zirconium Complex ◽  
Reliable Determination ◽  
Percentage Recovery ◽  
Quantitation Limit

A sensitive colorimetric determination of fluoride in drinking water has been developed using a polymeric zirconium complex of 5-(2-Carboxyphenylazo)-8-Hydroxyquinoline as fluoride reagents. The method allowed a reliable determination of fluoride in range of (0.0-1.5) mg L-1. The molar absorptivity of the complex formation is 7695 ± 27 L mol-1 cm-1 at 460 nm. The sensitivity, detection limit, quantitation limit, and percentage recovery for 1.0 mg L-1 fluoride for the proposed method were found to be 0.353 ± 0.013 μg mL-1, 0.1 mg L-1, 0.3 mg L-1, and 101.7 ± 4.1, respectively.

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