Excited-state proton transfer kinetics of carbazole

Characterization of the excimers of poly(N-vinylcarbazole) using TRANES

“…However, neither the steady state nor the time-resolved measurements display any distinct impression in favor of it. The fluorescence lifetime of carbazole in toluene and water media is determined to be 7 70.2 and 10.07 0.2 ns, respectively [38]. A similar lifetime component is not observed with the present polymer in either of the solvents (see above).…”

Excited State Proton Transfer of Carbazole. A Convenient Way to Study Microheterogeneous Environments

“…From their kinetic measurements Samanta et al put forward a value of pK* as10.98, one unit lower than the apparent pK* value as reported by Schulman et al [32,34]. Later on it was realized that the reverse reprotonation reaction rate was too much small compared with the ongoing competing other fast processes, to be determined with any accuracy at all, and the estimated pK* gives only an upper limit.…”

“…Table 2 summarizes the lifetimes of the prototropic species at different solution pH. A detailed kinetic analysis as shown by Samanta et al [34] considering Scheme 1 for the prototropic process yielded the rate constants for the individual processes as presented in Table 3.…”

“…Widely separated emissions allow us to determine the excited state lifetimes of the individual species [34] and hence to know the kinetic detail of the ESPT process. Table 2 summarizes the lifetimes of the prototropic species at different solution pH.…”

Effect of cyclodextrin encapsulation on the photocyclization of diphenylamine: Cavity imposed restriction on the reaction rate

“…Diphenylamine and carbazole (both from Aldrich) were purified following the procedures as mentioned elsewhere [26,27]. Good quality of cyclodextrins (ct-, 13-and y-) were procured from Fluka and were used as received without further purification.…”