Picosecond Dynamics Of Electron Transfer

K. G. Spears; T. H. Gray; D. Huang

doi:10.1117/12.933208

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23 April 1982 Picosecond Dynamics Of Electron Transfer

K. G. Spears, T. H. Gray, D. Huang

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Proceedings Volume 0322, Picosecond Lasers and Applications; (1982) https://doi.org/10.1117/12.933208
Event: 1982 Los Angeles Technical Symposium, 1982, Los Angeles, United States

Abstract

We report the solution kinetics for the photo-excited, intramolecular electron transfer of malachite green leucocyanide (MGCN) to form the malachite green dye cation (MG⁺) and a cyanide anion (CN^-). By analyzing picosecond resolved fluorescence emission and transient absorbance we have identified the ionizing state as the MGCN excited singlet. The solvent dielectric constant dramatically affected the kinetics of ion formation and the ultimate yield of ionization. The MG⁺ rise kinetics are not simple first order in the first 300 ps. The kinetics show a very fast rise that is almost independent of solvent dielectric constant (E) which is then followed by a slower rise that is very dependent on dielectric constant. More experiments to refine the solvent dependence are in progress. The apparatus included a synch pumped dye laser for fluorescence lifetime analysis and an amplified, synch pumped dye laser for transient absorption analysis.

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K. G. Spears, T. H. Gray, and D. Huang "Picosecond Dynamics Of Electron Transfer", Proc. SPIE 0322, Picosecond Lasers and Applications, (23 April 1982); https://doi.org/10.1117/12.933208

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