Excited State Lifetime Measurements

Demas J N 1983 Excited State Lifetime Measurements (New York Aoademio)... 

Demas, J.N. Excited State Lifetime Measurements Academic New York, 1983 ... 

Demas J. N. (1983) Excited State Lifetime Measurement, Academic Press, New York. 

Demas JN (1983) Excited state lifetime measurements. Academic, New York, p 64... 

Moreover, using high laser fluences one can saturate the i —> f transition in a manner that depends on the excited-state lifetime. Measuring the energy saturation threshold will relate directly to the decay time of this accessed reactive excited state a long decay will correspond to a low saturation threshold, and the converse. 

Excited State Lifetime Measurements The sensitivity of the fluorescence lifetime (rf) of a fluorescent label or probe to its environment can often yield important information concerning the conformation of a polyelectrolyte in aqueous solution [ 12,19-22,26,46,60,61,87-89]. 

Excited State Lifetime Measurements Corroborative evidence for an expanded water-swollen PAA structure across the entire pH range has been derived from excited state lifetime measurements [20,65,87,119]. For example, pyrene 10 5M was dispersed as a probe in a dilute PAA aqueous solution (10 2wt% w/v)... 

Demas, J.N., 1983. Excited State Lifetime Measurements. Academic Press, New York, du Rietz, C., Progress in Mineral Dressing, Stockholm, 1957, pp. 417-139. du Rietz, C., 1975. 11th IMPC, pp. 375-403. 

Much of the remaining interest has switched from the synthetic aspects of carbonyl photochemistry to more physical studies involving energy transfer and excited-state lifetime measurements. Typical of this area of study is the account by Zimmerman and his co-workers of the details of their studies of energy transfer in rod-like molecules (e.g., 1,2). A detailed study of the photochemical reaction of... 

The most sophisticated mode of fluorescence readout in reasonably common use. Intensity = measurement of fluorescence intensity at fixed wavelengths Exc. ratio = measurement of fluorescence at two separate excitation wavelengths and a common emission band and ratioing of the two excitation amplitudes Emission ratio = measurement of fluorescence at a common excitation wavelength and two separate emission bands and ratioing of the two emission amplitudes. Some intensity measurements may be replaced in the future by excited-state lifetime measurements. 

J.N. Demas, Excited State Lifetime Measurements, Academic Press 1983. 

---