By David H. Volman, George S. Hammond, Klaus Gollnick
Long ago 25 years, the emergence of lasers and laptop know-how has strongly encouraged examine at the dynamic habit of excited states and different transients. This quantity is a part of a continuous sequence meant to discover the frontiers of photochemistry via papers written via famous specialists. even supposing many comprise experiences of the literature, their basic objective is to provide serious reviews of present facts and to offer the usually powerful own viewpoints in their authors.
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Additional resources for Advances in Photochemistry. Volume 15
A corresponding plot for BA in a nonpolar solvent is given in Figure 23. These zero order (uncoupled) curves for the various configurations correspond to the following equations. F,, = FL'$ + -21 BorzZ Here pCTand pCT,are the dipole moments of the CT and CT' forms of the intramolecular charge transfer. They have the same magnitude but opposite EXCITED STATE CHARGE TRANSFER 1 I 1 -1 0 1 45 Reaction coordinate(z1 Figure 23. Theoretical estimates for the zero order free energies for the So, LE, CT, and C T states as a function of the solvent coordinate z.
2. Excited State Charge Transfer. Our goal here is to discuss aspects of ET theory that are most relevant to the charge transfer processes of excited molecules. One important point is that often the solvent relaxation is not well modeled with a single t1but rather a distribution of times apply. This subject has been treated by Hynes , Nadler and Marcus , Rips and Jortner , Mukamel , Newton and Friedman , Zusman , Warshel , and Fonseca . We also would like to study ET in the strongly adiabatic regime since experimental results on BA indicate this is the correct limit.
The lower section in the figure portrays the difference between the experimental C(t) and the biexponential fit on a scale that is expanded by a factor of 3 in the Y direction. From Ref. 33 with permission, from J . Phys. Chem. 93,7040 (1988). Copyright 1988, American Chemical Society. where C is an instrument constant, k&(X)is a fluorescence radiative rate constant (in the general case solvent polarity dependent), g ( X , A) is a spectral shape function that describes the (X) (polarization) dependent shape of the fluorescence spectrum and S&) is the population of the excited state e.
Advances in Photochemistry. Volume 15 by David H. Volman, George S. Hammond, Klaus Gollnick