Open AccessIntramolecular Relaxation Dynamics Mediated by Solvent–Solute Interactions of Substituted Fluorene Derivatives. Solute Structural Dependence
Author(s) -
Briana A. Capistran,
Stephen H. Yuwono,
Mehdi Moemeni,
Soham Maity,
Aria Vahdani,
Babak Borhan,
James E. Jackson,
Piotr Piecuch,
Marcos Dantus,
G. J. Blanchard
Publication year - 2021
Publication title -
the journal of physical chemistry. b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.864
H-Index - 392
eISSN - 1520-6106
pISSN - 1520-5207
DOI - 10.1021/acs.jpcb.1c06475
Subject(s) - intramolecular force , relaxation (psychology) , chromophore , intermolecular force , excited state , fluorene , chemistry , hydrogen bond , photochemistry , chemical physics , solvent , computational chemistry , molecular dynamics , proton , solvent effects , molecule , organic chemistry , polymer , atomic physics , physics , psychology , social psychology , quantum mechanics
Several fluorene derivatives exhibit excited-state reactivity and relaxation dynamics that remain to be understood fully. We report here the spectral relaxation dynamics of two fluorene derivatives to evaluate the role of structural modification in the intramolecular relaxation dynamics and intermolecular interactions that characterize this family of chromophores. We have examined the time-resolved spectral relaxation dynamics of two compounds, NCy- FR0 and MK- FR0 , in protic and aprotic solvents using steady-state and time-resolved emission spectroscopy and quantum chemical computations. Both compounds exhibit spectral relaxation characteristics similar to those seen in FR0 , indicating that hydrogen bonding interactions between the chromophore and solvent protons play a significant role in determining the relaxation pathways available to three excited electronic states.