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

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Nanotechnology

Background:

• Cucurbiturils are macrocyclic hosts with unique cavity structures.
• Developing porous supramolecular frameworks is crucial for advanced materials.
• Cucurbit[10]uril (Q[10]) possesses the largest known cavity among cucurbiturils.

Purpose of the Study:

• To construct a novel porous supramolecular framework using Q[10] and a cadmium chloride cluster.
• To investigate the host-guest properties of the Q[10]-based framework for dye encapsulation.
• To explore the luminescent properties of the resulting solid-state materials.

Main Methods:

• Single-crystal X-ray diffraction analysis to determine the framework structure.
• Synthesis of a Q[10]-[Cd4Cl16]8- based pillared diamond porous supramolecular framework.
• Encapsulation of guest dyes (rhodamine B, pyrenemethanamine hydrochloride, bathocuproine hydrochloride) within the framework.

Main Results:

• A 3D open-nanotube-type porous framework was successfully constructed via outer surface interactions of Q[10].
• The Q[10]-based framework effectively hosted various guest dyes.
• Solid materials exhibiting efficient red-green-blue (RGB) fluorescence were formed.

Conclusions:

• A facile method for constructing macrocycle-based porous frameworks was demonstrated.
• The Q[10]-based framework provides a simple and cost-effective route to multi-emitting solid luminescent materials.
• This approach facilitates the preparation of white-light-emitting materials.