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Observation of excited state charge transfer with fs/ps-CARS

“…[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] At the very basic level these processes involve the subpicosecond evolution of an electronically excited molecule as an electron is transferred from a donor to an acceptor. Electronic excitation induces structural changes within the molecule that depend highly on environmental parameters, especially the solvent environment.…”

“…This species, shown in Figure 1.2 has been studied by numerous groups and several explanations of its observed dynamics have been laid forth. [10][11][12][13][14][15][16][17] Fluorescent properties of this molecule are highly dependent upon solvent environment. In nonpolar solvents such as hexane DMABN exhibits fluorescence appearing as a mirror image of the absorption spectrum.…”

“…[10][11][12][13][14][15][16][17] This characteristic is supported by the fluorescence shifting to higher wavelengths in polar solvents, indicating that the dipolar character of the solvent stabilizes a charge separation within the excited species, causing a stabilization of the transient state and a reduction in its energy. Such behavior has been explained in many different ways including a planarization of the amino group, rehybridization of the cyano group, and a 'wagging' of the amino group.…”

“…This molecule consists of a benzopyrone moiety with amino (7) and methyl (4) substituents and has been studied experimentally and theoretically by several groups. [4][5][6][7][8][9][10][11][12] The solvatochromism displayed by this dye makes it an intriguing molecule to study.…”

Spectral Narrowing of UV-Visible Absorption and Emission Spectra of Anthracene-Derivatives in β-Cyclodextrin Nanocavity: Effects of Host/Guest Stoichiometry

“…CDs are well-known in their ability to form inclusion complexes with hydrophobic molecules in aqueous solution and a number of studies have been performed about photochemical properties of the CD complexes including fluorescent probes such as pyrene, anthracene, coumarin and their derivatives [3][4][5][6][7][8][9][10][11][12][13][14][15].…”