Fig. 4: Nanosecond transient absorption.
From: Lowering of the singlet-triplet energy gap via intramolecular exciton-exciton coupling
Normalized transient absorption spectra of the investigated compounds in (a) DCM and (b) ACN at a time delay of 1 µs obtained with an excitation wavelength corresponding to the absorption maximum of each of the compounds. c, d Show the ground state bleach kinetics of the monomer, dimer, trimer and tetramer probed at the respective ground state bleach maxima in DCM and ACN, respectively. Limited solubility of the trimer prevented quantification of ФT in ACN. Source data are provided as a Source Data file.
