Strickler-Berg

Cohen B, Crespo-Hemandez CE, Kohler B (2004) Strickler-berg analysis of excited singlet state dynamis in DNA and RNA nucleosides. Faraday Discuss 127 137... 

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] ... 

If the only way of de-excitation from Sj to S0 was fluorescence emission, the lifetime would be l/krs this is called the radiative lifetime (in preference to natural lifetime) and denoted by rf. The radiative lifetime can be theoretically calculated from the absorption and fluorescence spectra using the Strickler-Berg relation6 . 

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... 

The second parameter Moi also scales <5 of dipolar compounds and can be evaluated from the absorption spectrum using the Strickler-Berg treatment [338]. Reorganization of this relation results in Eq. (26) [338-340], showing the inverse proportionality between (M01)2 and excitation energy Em, but a direct relation exists between (Mqi)2 and the integral over the absorption band. 

Ca culated fiom kf = except where indicated. < alculated from the Strickler-Berg formula. 

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,... 

Radiative decay is the inverse of absorption and requires coupling of the two states via either an incident photon, which results in stimulated emission, or the constantly fluctuating radiation field, which results in spontaneous emission. The radiative lifetime is also the inverse of the Einstein A coefficient. This can be calculated from the integrated molar absorption coefficient in the absorption spectrum using the Strickler-Berg relationship [55]. 

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

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