Dy<sup>3+</sup> White Light Emission Can Be Finely Controlled by Tuning the First Coordination Sphere of Ga<sup>3+</sup>/Dy<sup>3+</sup> Metallacrown Complexes
Svetlana V. Eliseeva, Elvin V. Salerno, Beatriz A. Lopez Bermudez, Stéphane Pètoud, Vincent L. Pecoraro
Abstract
Single lanthanide(III) ion white light emission is in high demand since it provides the advantage of requiring only one chromophore for the control of the color. Herein, a series of Ga3+/Dy3+ metallacrowns (MCs) is presented, demonstrating outstanding white light colorimetric properties with CIE chromaticity coordinates of (0.309, 0.334) and correlated color temperature (CCT) equal to 6670 K for the MC emitting the closest to the standard white color. Experimental data reveal that the CIE coordinates within the studied series of MCs are controlled mainly by the Dy3+-centered emission rather than by the ligand-centered bands, implying that Dy3+ can be tuned as a single ionic white light emitter by a simple modification of the coordination environment.