Document Detail


Diffusion-controlled reactions: hydrodynamic interaction between charged, uniformly reactive spherical reactants.
MedLine Citation:
PMID:  17181345     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
In this work, different models of hydrodynamic interaction (HI) are examined in the diffusion-controlled reaction between uniformly reactive charged spherical particles. In addition to Oseen "stick" and "slip" models of HI, one is considered that accounts for the disturbance of fluid flow by the ions around one reactive partner as they interact with a neighboring reactive species. This interaction is closely related to the "electrophoretic effect" in electrokinetics and can be described by a fairly simple electrophoretic, or E-tensor. These models are applied to the electron-transfer quenching reaction of Ru(bpy)3(2+) and methyl viologen (MV2+) over a wide range of NaCl concentrations (Chiorboli, C. et al., J. Phys. Chem. 1988, 92, 156). The back reaction is also considered. From a comparison of the salt dependence of the model and experimental rates, it is concluded that the "E-tensor" model works best and ignoring HI altogether works worst. The Oseen "stick" and "slip" models fall between these.
Authors:
Stuart Allison
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The journal of physical chemistry. A     Volume:  110     ISSN:  1089-5639     ISO Abbreviation:  J Phys Chem A     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-12-21     Completed Date:  2007-03-13     Revised Date:  2007-03-27    
Medline Journal Info:
Nlm Unique ID:  9890903     Medline TA:  J Phys Chem A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  13864-7     Citation Subset:  -    
Affiliation:
Department of Chemistry, Georgia State University, P.O. Box 4098, Atlanta, GA 30302-4098, USA.
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