Hopping reactions of charged particles

Abstract

Articles you may be interested inEffect of an external electric field on the diffusion-influenced geminate reversible reaction of a neutral particle and a charged particle in three dimensions. IV. Excited-state ABCD reaction J. Chem. Phys. 140, 064502 (2014); 10.1063/1.4864202Effect of an external electric field on the diffusion-influenced geminate reversible reaction of a neutral particle and a charged particle in three dimensions. III. Ground-state ABCD reaction Direct ab initio dynamics calculations for rates and the kinetic isotope effects of multiproton transfer in ClONO 2 + HCl → HNO 3 + Cl 2 reactions with water clusters: Breakdown of the rule of the geometric mean Diffusion-influenced reactions of particles with several active sites J. Chem. Phys. 128, 155105 (2008); 10.1063/1.2898091 Long-time behavior of the diffusion-controlled A+B→0 reaction with hopping energy relaxationThe hopping theory of transfer reactions is essentially generalized to account for the electrostatic interaction between reactants. An application is made for a solvated electron that may be trapped by ions in the course of a random walk in liquid solutions. The hopping reaction constant differs essentially from the diffusional constant but exhibits a similar dependence on the Onsager radius: reactions with anions are strongly suppressed while reactions with cations are significantly accelerated.

Geminate Recombination in the Presence of Scavengers: The New Vision of the Old Problem

“…Being an obvious alternative to diffusion mechanism, the hopping mechanism was first proposed in papers [36,37] to describe luminescence impurity quenching experiments in solid solutions. For liquid phase reaction it is developed in papers [38][39][40][41][42] and was first found experimentally in excess electron capture reactions in nonpolar liquids [43].…”

“…This model allows us to obtain exact kinetic equations for the general type of A and C reactants mobility and the Coulomb interaction in a geminate pair [35]. The most essential assumption of the model is that B particle of a geminate pair (excess electron) reacting with scavengers C moves by infinitely large jumps (the hopping mechanism [36][37][38][39][40][41][42]). The hopping mechanism has been used more than once to describe the scavenging of an excess electron moving by random walks in solutions [40][41][42][43][44].…”

“…The most essential assumption of the model is that B particle of a geminate pair (excess electron) reacting with scavengers C moves by infinitely large jumps (the hopping mechanism [36][37][38][39][40][41][42]). The hopping mechanism has been used more than once to describe the scavenging of an excess electron moving by random walks in solutions [40][41][42][43][44]. This assumption of the large jumps is justified by the well-known fact that mean free path of excess electrons is fairly large in some solvent of low polarity [23,43,45] (≈60-200Å).…”

Electric field suppression of hopping charge recombination

“…1. Turning on the electric field suppresses the charge recombination pulling out the electrons from the Coulomb well around the counter-ion.…”

“…In this case the recombination is hopping and its rate which is proportional to a frequency of jumps, 1/ 0 , differs essentially from the diffusional one determined by the diffusion constant of the solvated electron, Dϭ 0 2 / 0 . 1 The impact of the electric field on the electron-ion recombination rate that has been obtained experimentally [2][3][4] was the subject of a recent theoretical study on the frame of diffusional theory and contact approximation. 5 Since with 0 diffusional theory gives way to the hopping alternative it is reasonable now to study the electric field effect within hopping theory of recombination.…”