A Double-Walled Tetrahedron with AgI4 Vertices Binds Different Guests in Distinct Sites

A  double-walled tetrahedral metal-organic cage assembled in solution from silver(I), 2-fromyl-1,8-naphthyridine, halide, and a threefold-symmetric triamine. 

We report the assembly of a tetrahedral metal-organic cage, which has a unique double-walled structure supported by silver halide clusters at the vertices. A binding study demonstrates two different binding modes – direct binding into the interior of the cage, as observed for small anionic guests, or binding into exterior clefts, as observed for small aromatic guests. The cage formed using chloride, bromide, or iodide. We observed substitution of lighter halides for heavier ones. We thus believe that our study brings significant new insights into the assembly of cage architectures with polynuclear vertices, and establishes how their useful binding behavior differs from cages incorporating mononuclear vertices.

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Angewandte Chemie International Edition (2023) 
Ultima modifica il Lunedì, 20 Marzo 2023 19:26