Abstract
Charge-shift species arising from intramolecular electron transfer have been identified for 9-aryl derivatives of the 10-methyl-acridinium ion through observation of red-shifted fluorescence emission bands and the appearance of radical (ion) transients (CH3CN and CH2Cl2 solvents) using laser flash photolysis. Rates of forward and return charge-shift processes have been determined, the former occurring in the 1 ps time domain with small effects associated with changes in solvent and the electron donor substituent. Rates for return electron transfer were a strong function of the donor oxidation potential and showed acceleration with decreased driving force (inverted behavior). The lifetimes for charge-shift intermediates could be 'tuned' over three orders of magnitude as the result of changes in acridinium structure and solvent.
Original language | English (US) |
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Pages (from-to) | 40-46 |
Number of pages | 7 |
Journal | Chemical Physics Letters |
Volume | 229 |
Issue number | 1-2 |
DOIs | |
State | Published - Oct 21 1994 |
Funding
Support of this research by the Department of Energy, Office of Basic Energy Sciences,D ivision of Chemical Sciences,i s gratefully acknowledged.S RG would like to acknowledget he support of the Distin-guishedP ostdoctoralR esearchP rogram sponsoredb y the US DOE Office of Science Education and Technical Information. We also wish to thank Ding-Xue Yan for technical support.
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry