Unraveling the effect of solvents on the excited state dynamics of C540A by experimental and theoretical study

Abstract

The excited-state dynamics including intramolecular charge transfer and the redshift of C540A in a series of solvents have been investigated using femtosecond transient absorption spectra and systematic theoretical calculation.

The investigation of the ultrafast excited state deactivation mechanisms for coumarin 307 in different solvents

“…[6][7][8][9][10] Intermolecular hydrogen bonds and the polarity of solvents as external factors play a vital role in the formation of the TICT state for dye molecules. [11][12][13][14] The 7-aminocoumarin (7-NHEt) dyes, as a distinct subset within the coumarin dye family, serve as a valuable model system for investigating the dynamics of electronic excited states, 9,[15][16][17] which exhibit signicant alterations in dipole moment between the ground state and electronic excited states, as well as substantial solvatochromic shis in steady-state absorption and photoluminescence spectra, as reported in previous studies. [18][19][20][21] And the solvatochromic shis can be associated with the ICT process from the electron donor amino group to the electron acceptor carbonyl group.…”

“…6–10 Intermolecular hydrogen bonds and the polarity of solvents as external factors play a vital role in the formation of the TICT state for dye molecules. 11–14…”

Solvent effects on the intramolecular charge transfer excited state of 3CzClIPN: a broadband transient absorption study

“…25 However, research has often been limited to rather simple donor-acceptor molecules. [25][26][27][28] Moreover, the spectroscopic study of ICT-capable organic molecules in aromatic solvents is challenging due to the interplay of various possible types of solute-solvent interactions such as p-p, XH-p (X = C, N, S, O), cation-p, and anion-p interactions. [29][30][31][32] The intricate nature of these interactions is governed by a combination of electrostatic, dispersive, inductive, and exchange-repulsive forces, depending on the particular interacting groups, molecular configuration, and charge distribution.…”