Strickler-Berg equation

From spectroscopic measurements, we can estimate the fluorescence lifetime, t [. = (PpTi. where the natural lifetime, rN, can be calculated from the Strickler-Berg equation in CGS units [60] ... 

Radiative Processes. As was stated previously, the fluorescence rate constants of formaldehyde and acetaldehyde are larger than those of the higher aldehydes. When the radiative lifetime, TQ(expt), deduced from observed values of tr and by eq. 8 is compared to the values of tr(SB) calculated from the Strickler-Berg equation,... 

X 10 s compared with 2.2 x lO s" and 2.8 x 10 s . Application of the disputed refractive index, n, correction further increases the divergence between these data while the theoretical value for kp (2.5 x 10 s ) derived using the Strickler-Berg equation, neglecting n is in close agreement with the gas phase data. The phase effect may be the result of uncertainties in measurement of various parameters, or, more probably interactions in the condensed phase which are not explained by the n relationship. Reported data on CgDg are less extensive than for... 

As first pointed out by Hochstrasser and coworkers [23], there are significant discrepancies between the electronic transition probabilities obtained experimentally and calculated from observed absorption and fluorescence spectra in terms of the Strickler-Berg equation [7,14,15,23,28,33]. The experimental fluorescence radiative rate constants kp of Cgo and C70 can be obtained from observed fluorescence quantum yields lifetimes -Cp,... 

The Strickler-Berg Equation and Other Relationships Between Absorption and... 233... 

The Strickler-Berg equation usually is written in terms of the wavenumber (v = 1/2 = v/c) instead of the frequency ... 

The energy stored in an excited state is dissipated by the unimolecular radiative and radiationless relaxations. For strongly allowed electronic transitions, Strickler and Berg have obtained an expression for the rate constant of the excited-state radiative decay (Equation 6.67).31... 

Although the direct measurement of fluorescence decay is to be preferred as a method for obtaining radiative lifetimes, they can be calculated from the Einstein B coefficient [99] (see also ref. 98) via an equation first derived by Strickler and Berg [100]. This equation gives good results for a wide variety of molecules when applied within the limits of its validity, i.e. the transition should be optically allowed and the electronic transition moment independent of nuclear configuration. 

Equation 2.10, which permit the determination of fluorescence rate constants kf from the broad absorption spectra of molecules, have been derived. The best known is that of Strickler and Berg.31 A simpler version that is easier to use (Equation 2.11)32 is sufficient for most practical purposes ... 

This relation is only strictly applicable to two-level systems, such as atomic systems, where the transitions have sharp lines and in a medium of refractive index =1. The electric dipole radiation dominates the mechanism of radiative decay in molecular systems. For molecular systems in solution, Strickler and Berg proposed a modified equation that gives good results for the radiative rate [7]... 

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