The subtle balance of the metrics of the highly supple 5,5'-pyridyl-3,3'-bis-1H-pyrazolate and the variable coordination numbers of Cu(I) favor the stabilization of a [4 X 4] grid complex with all Cu(I). It has numerous cuprophilic bonds (Cu center dot center dot center dot Cu = 2.56-3.02 angstrom), and consequently, exhibits strong orange luminescence that fades upon insertion of solvents without loss of crystallinity.