Kinetics of fluorescence quenching for electron transfer and for energy transfer: Molecular dynamics tests for spherical molecules

Journal Article · Sun May 22 04:00:00 EDT 2005 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1901657· OSTI ID:20722250

Litniewski, Marek; Gorecki, Jerzy ^[1]

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1. Institute of Physical Chemistry of the Polish Academy of Science, Kasprzaka 44/52, 01-224 Warsaw (Poland)

The Smoluchowski approach to description of fluorescence quenching is tested by comparing the theory with computer simulations for the case of spherical molecules. The distance dependent sink terms describing the electron transfer mechanism and the Forster model for the energy transfer are considered. It is shown that the agreement between the rate coefficient from the model and from simulations depends on the strength of the solute-solvent interactions as well as on the speed of reaction itself. Comparing results of simulations for different quencher concentrations we estimate the strength of quencher concentration dependence effect and the range of times the effect may be significant. In the long time limit the increase in quencher concentration decreased the rate coefficient.

• OSTI ID: 20722250
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 20 Vol. 122; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CHARGE-EXCHANGE REACTIONS
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
ELECTRON TRANSFER
ENERGY TRANSFER
FLUORESCENCE
INTERACTIONS
MOLECULAR DYNAMICS METHOD
QUENCHING
REACTION KINETICS
SOLUTES
SOLVENTS