Two-step anti-cooperative self-assembly process into defined π-stacked dye oligomers: insights into aggregation-induced enhanced emission
Yvonne Vonhausen, Andreas Lohr, Matthias Stolte, Frank Würthner
Abstract
from ∼0.001 for the dimer up to ∼0.011 for the higher aggregate. Analysis of the radiative and non-radiative decay rates corroborates the interpretation that the AIEE effect originates from a pronounced decrease of the non-radiative rate due to π-π-stacking induced rigidification that outmatches the effect of the reduced radiative rate that originates from the H-type exciton coupling in the co-facially stacked dyes.
Topics & Concepts
MerocyanineAggregation-induced emissionLuminescenceSelf-assemblyPhotochemistryMaterials scienceRadiative transferDipoleChemical physicsChemistryNanotechnologyOptoelectronicsFluorescenceOpticsOrganic chemistryPhysicsPhotochromismLuminescence and Fluorescent MaterialsSupramolecular Self-Assembly in MaterialsPolydiacetylene-based materials and applications