Capturing radioactive strontium by a metal-organic cage: Developing functional recognition sites through acyl-type metal node engineering (IMAGE)

Science China Press

Capturing radioactive strontium by a metal-organic cage: Developing functional recognition sites through acyl-type metal node engineering

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Engineering metal-organic cages (MOCs) with metal acyl nodes utilizes the axial oxygen atoms of these nodes as complementary internal binding sites for the supramolecular recognition of metal ions. The resultant uranyl-based MOC (UOC) efficiently encapsulates Sr2+ within its cryptand-like cavity through metal-ligand coordination, thereby facilitating the selective removal of trace-level Sr2+. Furthermore, the hydrophobic cavities at both ends of the coordination cage in the UOC enable the recognition of organic guests and support the co-recognition of two types of guests within the same UOC.

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