Cycloparaphenylene-based ionic donor-acceptor supramolecule: Isolation and characterization of Li⁺@C₆₀⊂[10]CPP

The first cycloparaphenylene (CPP)-based ionic donor-acceptor supramolecule Li⁺@C₆₀⊂[10]CPP X^- has been synthesized. X-ray crystallography not only confirmed the molecular structure of Li⁺@C₆₀⊂[10]CPP X^- but also uncovered the formation of a unique ionic crystal. The strong charge-transfer interaction between [10]CPP and Li⁺@C₆₀, which was confirmed by electrochemical measurement and spectroscopic analyses, caused significant delocalization of the positive charge across the entire complex. Widen your sphere of influence: A strong charge-transfer interaction between [10]CPP and Li⁺@C₆₀ in the first cycloparaphenylene (CPP)-based ionic donor-acceptor supramolecule Li⁺@C₆₀⊂[10]CPP X^- is confirmed by electrochemical measurement and spectroscopic analyses. The complex is also characterized by X-ray crystallography. The charge transfer causes significant delocalization of the Li⁺ positive charge over the entire complex.