Stopped-Flow Investigation of Trifluoromethanesulfonic Acid Initiated Cationic Oligomerization oftrans-1,3-Diphenyl-1-butene. 2. A Model Kinetic Study of Styrene Cationic Polymerization

1998 ◽  
Vol 31 (8) ◽  
pp. 2403-2408 ◽  
Author(s):  
Bernadette Charleux ◽  
Alain Rives ◽  
Jean-Pierre Vairon ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Kinetic Study ◽  
Cationic Polymerization ◽  
Trifluoromethanesulfonic Acid ◽  
Stopped Flow ◽  
Flow Investigation

scholarly journals Stopped-flow kinetic study of the H2O2 oxidation of substrates catalyzed by microperoxidase-8

2001 ◽  
Vol 6 (8) ◽  
pp. 770-777 ◽  
Author(s):  
Hui-Chun Yeh ◽  
Jinn-Shyan Wang ◽  
Oliver Y. Su ◽  
Wann-Yin Lin
Keyword(s):  
Kinetic Study ◽  
Stopped Flow ◽  
H2o2 Oxidation ◽  
Microperoxidase 8

scholarly journals Kinetic study of catalytic CO 2 hydration by metal-substituted biomimetic carbonic anhydrase model complexes

2019 ◽  
Vol 6 (8) ◽  
pp. 190407 ◽  
Author(s):  
DongKook Park ◽  
Man Sig Lee
Keyword(s):  
Transition Metals ◽  
Carbonic Anhydrase ◽  
Kinetic Study ◽  
Water Ligand ◽  
Stopped Flow ◽  
Rapid Rise ◽  
Ph Titration ◽  
Model Complexes ◽  
Hydration Rate ◽  
Biomimetic Complexes

The rapid rise of the CO 2 level in the atmosphere has spurred the development of CO 2 capture methods such as the use of biomimetic complexes that mimic carbonic anhydrase. In this study, model complexes with tris(2-pyridylmethyl)amine (TPA) were synthesized using various transition metals (Zn 2+ , Cu 2+ and Ni 2+ ) to control the intrinsic proton-donating ability. The pK a of the water coordinated to the metal, which indicates its proton-donating ability, was determined by potentiometric pH titration and found to increase in the order [(TPA)Cu(OH 2 )] 2+ < [(TPA)Ni(OH 2 )] 2+ < [(TPA)Zn(OH 2 )] 2+ . The effect of pK a on the CO 2 hydration rate was investigated by stopped-flow spectrophotometry. Because the water ligand in [(TPA)Zn(OH 2 )] 2+ had the highest pK a , it would be more difficult to deprotonate it than those coordinated to Cu 2+ and Ni 2+ . It was, therefore, expected that the complex would have the slowest rate for the reaction of the deprotonated water with CO 2 to form bicarbonate. However, it was confirmed that [(TPA)Zn(OH 2 )] 2+ had the fastest CO 2 hydration rate because the substitution of bicarbonate with water (bicarbonate release) occurred easily.

scholarly journals A fluorescence stopped-flow kinetic study of the conformational activation of α-chymotrypsin and several mutants

2004 ◽  
Vol 13 (9) ◽  
pp. 2533-2540 ◽  
Author(s):  
Gert Verheyden ◽  
Janka Matrai ◽  
Guido Volckaert ◽  
Yves Engelborghs
Keyword(s):  
Kinetic Study ◽  
Stopped Flow
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