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.