Abstract
A new anthracene-based macrocyclic host (H) was designed and synthesized. H has a molecular box-type structure with a flexible cavity. It exhibits highly strong binding affinities towards selected cationic model guests, butyl viologen (BV), dibutylammonium (DBA), and octyltrimethylammonium (OTMA). For example, the association constant of H and BV is up to (2.2 ± 0.3) × 107 M−1; it is interesting to observe host-guest charge-transfer band (and color change) and fluorescence quenching of H’s anthracene unit due to the formation of inclusion complex.
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