Single-Molecule Magnet with Thermally Activated Delayed Fluorescence Based on a Metallofullerene Integrated by Dysprosium and Yttrium Ions.
basic_science · Level V
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- Also identified by DOI 10.1021/acsnano.1c05105.
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Abstract
It is vital to construct luminescent single-molecule magnets (SMMs) and explore their applications in quantum computing technique and magneto-luminescence devices. In this work, we report a luminescent single-molecule magnet with thermally activated delayed fluorescence (TADF) based on metallofullerene DyY<sub>2</sub>N@C<sub>80</sub>. DyY<sub>2</sub>N@C<sub>80</sub> was constructed by integrating dysprosium and yttrium ions into a fullerene cage. Magnetic results suggest that DyY<sub>2</sub>N@C<sub>80</sub> exhibits magnetic hysteresis loops below 8 K originating from the Dy<sup>3+</sup> ion. Moreover, DyY<sub>2</sub>N@C<sub>80</sub> exhibits TADF originating from the Y<sup>3+</sup>-coordinated carbon cage, whose luminescence peak positions and peak intensities can be obviously influenced by Dy<sup>3+</sup>. Furthermore, a supramolecular complex of DyY<sub>2</sub>N@C<sub>80</sub> and [12]Cycloparaphenylene ([12]CPP) was then prepared to construct a single-molecule magnet with multiwavelength luminescence. The effects of host-guest interaction on photoluminescence properties of DyY<sub>2</sub>N@C<sub>80</sub> were disclosed. Theoretical calculations were also employed to illustrate the structures of DyY<sub>2</sub>N@C<sub>80</sub> and DyY<sub>2</sub>N@C<sub>80</sub>⊂[12]CPP.