Ultrafast Dynamics of Tripyrrindiones in Solution Mediated by Hydrogen-Bonding Interactions

• DOI: 10.1021/acs.jpcb.9b01916
• Publication Date: 2019-06-09T15:12:38Z
• Authors: Alicia Swain; Byungmoon Cho; Ritika Gautam; Clayton J. Curtis; Elisa Tomat; Vanessa Huxter
• Keywords: Quantum yield; Photon Upconversion; Pauli exclusion principle

The optical properties and ultrafast dynamics of hexaethyl tripyrrin-1,14-dione (H3TD1) are tuned by hydrogen-bonding interactions between the solute solvent. In solvents with low affinity, H3TD1 preferentially forms hydrogen-bonded dimers, whereas in that can either donate or accept hydrogen bonds is present as a monomer. distinction dimer monomer determines system, faster internal conversion observed form. were characterized using time-correlated single photon counting, fluorescence upconversion, transient absorption measurements. time-resolved both solution modeled Pauli master equation treatment for three level system. solvent-dependent measured steady-state fluorescence. This data was then used to calculate quantum yield extinction coefficients.