Femtosecond fluorescence studies of two-dimensional dynamics in photoexcited Michler's ketones

Femtosecond Studies of Solvation and Intramolecular Configurational Dynamics of Fluorophores in Liquid Solution

“…228,229 Fluorescence up-conversion transients were measured for MK and BMK in the protic solvents methanol, ethanol, and decanol, and in the aprotic solvents acetonitrile and DMF. The transients could be fitted with a multiexponential function convoluted with the system response function, and the best-fit functions were used to compute time-resolved fluorescence spectra by means of the spectral reconstruction procedure.…”

“…The transients could be fitted with a multiexponential function convoluted with the system response function, and the best-fit functions were used to compute time-resolved fluorescence spectra by means of the spectral reconstruction procedure. 69,228 Figure 22 presents data for MK in various protic solvents. The solid curves are best-fit curves for the simulated points to log-normal line shape functions.…”

Electronic Interactions of Michler's Ketone with DNA Bases in Synthetic Hairpins

“…These differences are attributed to the sensitivity of MK excited state single bond torsion to specific solvation. Further insight into the excited state behavior of MK in methanol is provided by the femtosecond fluorescence up-conversion studies of Vedhoven et al (24). The weighted fluorescence decay time for MK in methanol is 2 ps, similar to the decay of MK' 685 nm singlet-singlet absorption in methanol (Figs.…”

“…and S2). These authors conclude that phenyl group twisting as well as solvent dynamics determine the dynamics of MK radiative and nonradiative decay at short times in methanol .…”

Study of intramolecular charge transfer of Michler’s ketone using time dependent density functional theory

“…During the last few decades, an accruable measure of interest on twisted intermediate charge transfer (TICT) process has been achieved in both theoretical and experimental fields of research [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Although these studies propose many interesting models and hitherto features of TICT process, but till, none of these models fully enable provision of a unified interpretation of the ICT process from donor to an acceptor within a same molecule.…”