Controlled potential coulometric method to determine the average titanium oxidation state of titanium chlorides in sodium chloride

1992 ◽  
Vol 64 (17) ◽  
pp. 2001-2002 ◽  
Author(s):  
Charles E. Baumgartner
Keyword(s):  
Sodium Chloride ◽  
Oxidation State ◽  
Coulometric Method ◽  
Titanium Oxidation ◽  
Controlled Potential

Reductive dechlorination of DDT electrocatalyzed by synthetic cobalt porphyrins in N,N′-dimethylformamide

2011 ◽  
Vol 15 (01) ◽  
pp. 66-74 ◽  
Author(s):  
Weihua Zhu ◽  
Yuanyuan Fang ◽  
Wei Shen ◽  
Guifen Lu ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Reaction Time ◽  
Oxidation State ◽  
Reductive Dechlorination ◽  
Reaction Products ◽  
Ms Analysis ◽  
Controlled Potential Electrolysis ◽  
Cobalt Porphyrins ◽  
Controlled Potential ◽  
Uv Visible

Two cobalt porphyrins, (OEP) CoII and (TPP) CoII , where OEP and TPP are the dianions of octaethylporphyrin and tetraphenylporphyrin, respectively, were examined as electrocatalysts for the reductive dechlorination of DDT (1,1-bis(4-chlorophenyl)-2,2,2-trichloroethane) in N,N′-dimethylformamide (DMF) containing 0.1 M tetra-n-butylammonium perchlorate (TBAP). No reaction is observed between DDT and the porphyrin in its Co(II) oxidation state but this is not the case for the reduced Co(I) forms of the porphyrins which electrocatalyze the dechlorination of DDT, giving initially DDD (1,1-bis(4-chlorophenyl)-2,2-dichloroethane), DDE (1,1-bis(4-chlorophenyl)-2, 2-dichloroethylene) and DDMU (1,1-bis(4-chlorophenyl)-2-chloroethylene) as determined by GC-MS analysis of the reaction products. A further dechlorination product, DDOH (2,2-bis(4-chlorophenyl)ethanol), is also formed on longer timescales when using (TPP)Co as the electroreduction catalyst. The effect of porphyrin structure and reaction time on the dechlorination products was examined by GC-MS, cyclic voltammetry, controlled potential electrolysis and UV-visible spectroelectrochemistry and a mechanism for the reductive dechlorination is proposed.

Titanium-magnesium catalysts for olefin polymerization - effect of titanium oxidation state on catalyst performance

Polimery ◽  
2008 ◽  
Vol 53 (05) ◽  
pp. 353-357 ◽  
Author(s):  
TATIANA B. MIKENAS ◽  
ANDREY A. TREGUBOV ◽  
VLADIMIR A. ZAKHAROV ◽  
LUDMILA G. ECHEVSKAYA ◽  
MIKHAIL A. MATSKO
Keyword(s):  
Oxidation State ◽  
Olefin Polymerization ◽  
Titanium Oxidation

Moving up and down the Titanium Oxidation State in Ziegler−Natta Catalysis

2011 ◽  
Vol 44 (4) ◽  
pp. 778-783 ◽  
Author(s):  
Naeimeh Bahri-Laleh ◽  
Andrea Correa ◽  
Shahram Mehdipour-Ataei ◽  
Hassan Arabi ◽  
Mehdi Nekoomanesh Haghighi ◽  
...  
Keyword(s):  
Oxidation State ◽  
Titanium Oxidation

Extraction, Controlled-Potential Coulometric Method Specific for Uranium(IV)

1959 ◽  
Vol 31 (1) ◽  
pp. 10-16 ◽  
Author(s):  
G. L. Booman ◽  
W. B. Holbrook
Keyword(s):  
Coulometric Method ◽  
Controlled Potential

Effect of fatty amine and perfluorocarbon as anti-fouling agent on the catalyst activity and titanium oxidation state in slurry polymerization of ethylene

2006 ◽  
Vol 102 (1) ◽  
pp. 257-260 ◽  
Author(s):  
Mojtaba Mousavi ◽  
Shokoofeh Hakim ◽  
Mehdi Nekoomanesh
Keyword(s):  
Oxidation State ◽  
Catalyst Activity ◽  
Fatty Amine ◽  
Titanium Oxidation

Study of oxidation state of plutonium in solution by flow-coulometric method

Talanta ◽  
1972 ◽  
Vol 19 (3) ◽  
pp. 329-340 ◽  
Author(s):  
S Kihara
Keyword(s):  
Oxidation State ◽  
Coulometric Method
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