Fig. 3

a Three-dimensional network structure of SC 1 showing pronounced π–π stacking interactions between adjacent 2,2′-bipyridine ligands; b extended network stabilized by additional intermolecular hydrogen bonds along the c-axis
a Three-dimensional network structure of SC 1 showing pronounced π–π stacking interactions between adjacent 2,2′-bipyridine ligands; b extended network stabilized by additional intermolecular hydrogen bonds along the c-axis