Construction of a Ag₁₂ High-Nuclearity Metallamacrocyclic 3D Framework

An unprecedented high-nuclearity metallamacrocycle-based 3D silver framework with formula {[Ag₂(C₂₅H₂₇N₆O)₂](CH₃OH)(H₂O)_0.17}_n (1), built on the basis of dodecanuclear silver building blocks, has been synthesized and characterized, and it shows strong phosphorescence emission at 10 K, which is a consequence of the presence of intersystem crossing from singlet to triplet caused by the heavy-atom effect of silver ions.