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The anion-binding properties of ureidoquinoline, a derivative of 8-hydroxyquinoline, were investigated. In the presence of anions, ureidoquinoline exhibits turn-on fluorescence rather than its fluorescence being quenched or shifted. These properties are rare for phenol-based sensors. In particular, ureidoquinoline binds to H 2 PO 4− and BzO − , while F − binds...
A novel chemical cyclization method using BBr 3 has been successfully developed to prepare ladder-type conjugated systems. The cyclized ladder compounds revealed an extended conjugation due to planarization of the structures. The extended ladder polymer can also be easily prepared by our chemical cyclization method using a soluble precursor.
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