Computer Simulations of Viscosity Dependent Molecular Relaxation Processes | Zendy

M. Kaschke | Zendy; J. Kleinschmidt | Zendy; B. Wilhelmi | Zendy

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Computer Simulations of Viscosity Dependent Molecular Relaxation Processes

Author(s) -

M. Kaschke,

J. Kleinschmidt,

B. Wilhelmi

Publication year - 1984

Publication title -

laser chemistry

Language(s) - English

Resource type - Journals

eISSN - 1026-8014

pISSN - 0278-6273

DOI - 10.1155/lc.5.119

Subject(s) - excited state , relaxation (psychology) , chemistry , quantum yield , population , viscosity , isomerization , yield (engineering) , chemical physics , quantum , statistical physics , atomic physics , fluorescence , thermodynamics , quantum mechanics , physics , psychology , social psychology , biochemistry , demography , sociology , catalysis

The dependence of excited-state lifetime, fluorescence quantum yield and isomerizationrate of organic dye molecules on solvent viscosity has been a subject of numerousexperimental and theoretical investigations. To explain the viscosity dependence ofexcited-state lifetime in this paper the temporal behavior of the excited state populationis calculated for several models of the molecular relaxation process by a computersimulation incorporating both the stochastical motion of large molecular parts in theexcited state and relaxation transitions. The described method is applicable to calculatingthe probability of changing the electronic state as a function of time and internalrotation coordinate.

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