Naphthylacetonitrile isomerism and donor conformational flexibility controlled molecular self-assembly and solid-state fluorescence properties

Halogen atom substitution effect on the carbazole fluorescence properties and supramolecular interactions in the solid-state

“…1–3 The molecular structure and supramolecular interaction controlled molecular assembly exerted strong influence on the fluorescence properties in the solid-state. 4–6 For instance, polyaromatic π-conjugated molecules showed strong fluorescence in the solution-state but became non-emissive or weakly emissive in the solid-state due to the aggregation caused quenching (ACQ) effect. 7 However, chemical modification such as functional/bulky group substitution prevented the co-facial π⋯π stacking and produced strong fluorescence in solution as well as the solid-state.…”