Multiple Efficient Fluorescence Emission from Cucurbit[10]uril-[Cd₄Cl₁₆]^8–-Based Pillared Diamond Porous Supramolecular Frameworks

Cucurbit[10]uril (Q[10] or CB[10]), with the largest rigid cavity (ca. 1.0 nm) yet characterized in the cucurbiturils family, and indeed among all artificial macrocyclic receptors to date, has been successfully exploited to construct a novel Q[10]–[Cd 4 Cl 16 ] 8– -based pillared diamond porous supramolecular framework. Single-crystal X-ray diffraction analysis revealed that the three-dimensional open-nanotube-type porous framework is constructed from free Q[10] molecules and [Cd 4 Cl 16 ] 8– cluster anions through the outer surface interactions of Q[10]. Notably, the Q[10]-based porous framework host can accommodate guest dyes, such as rhodamine B (G 1 ), pyrenemethanamine hydrochloride (G 2 ), and bathocuproine hydrochloride (G 3 ), to form solid materials with efficient red-green-blue (RGB) fluorescence. This work not only exemplifies a facile approach for the construction of macrocycle-based porous frameworks but also offers a simple, lower cost, yet still highly efficient means of preparing multi-emitting, including white-light-emitting, solid luminescent materials.