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Journal Article
Research Support, Non-U.S. Gov't
Synthesis, Structure, and Properties of Corona[6]arenes and Their Assembly with Anions in the Crystalline State.
Journal of Organic Chemistry 2018 Februrary 3
The synthesis, conformational structure, electronic property, and anion complexation of novel coronarenes were systematically studied. A number of corona[4]arene[2]tetrazines that contain different combinations of nitrogen atoms with O, S, SO2 , and CH2 as bridging units were synthesized conveniently by means of a fragment coupling strategy based on efficient nucleophilic aromatic substitution reaction of easily available aromatic dinucleophiles and 3,6-dichlorotetrazine. The resulting macrocycles adopt crownlike conformational structures with the nitrogen bridge(s) forming conjugation with carbonyl and the other heteroatom linkages with tetrazine. CV and DPV measurements showed that the tetrazine-bearing coronarenes were electron deficient with reduction potentials ranging from -896 to -960 mV. Owing mainly to noncovalent anion-π attractive interactions, N2 ,O4 -corona[4]arene[2]tetrazine formed complexes with anions of varied geometries and shapes yielding diverse assembled structures in the solid state.
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