Synthesis, Structure and Luminescence Properties of a Three-Dimensional Heterobimetallic Chiral Metal-Organic Framework Based on Sodium(I), Lead(II) and (S)-5,5′-Bis(4-carboxyphenyl)-2,2′-bis(diphenylphosphinoyl)-1,1′-binaphthyl as Linker

The heterobimetallic three‐dimensional metal–organic framework {[Na2Pb2(L)3(H2O)(dmf)4]·9dmf}n (1), which contains {Pb2Na(η2‐O2CR)6} moieties as secondary building units, was obtained by solvothermal reaction of Pb(NO3)2 and (S)‐5,5′‐bis(4‐carboxyphenyl)‐2,2′‐bis(diphenylphosphinoyl)‐1,1′‐binaphthyl (H2L) in the presence of NaOH in dimethylformamide (dmf). In the solid state, 1 forms a three‐dimensional network with bcu topology. Ligand‐based violet‐blue luminescence is observed for compound 1 and assigned to the S1→S0 transition of the aromatic units. A luminescent homochiral heterobimetallic (Na–Pb) three‐dimensional network based on an axially chiral (S)‐5,5′‐functionalized 2,2′‐bis(diphenylphosphanyl)‐1,1′‐binaphthyl oxide as linker was obtained by means of a solvothermal reaction. This compound is a promising candidate for future applications as a luminescent material.