Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 21, Issue 1, Pages 46-56Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cp04730h
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We report a QM (TD-DFT) and QM/QM0 (ONIOM) study of the modulation of emission in a series of thiazolo[5,4, b] thieno[3,2-e] pyridine (TTP) derivatives [Huang et al., J. Mater. Chem. C, 2017, 14, 3456]. By computing the excitation energy transfer couplings and the Huang-Rhys (HR) factors, we rationalize the aggregation-caused quenching (ACQ) observed for the parent molecule and the crystallization-induced emission (CIE) observed for the derivatives presenting intra-molecular H-bonding. We also show that the CIE strategy relying on the rigidification of the arch-bridge-like stator should be considered with caution since it can promote the energy dissipation through vibrational motions.
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