A new heterometallic hybrid based on polymeric iodoplumbate and lanthanide metal-carboxylic coordination polycation

A 3-D supramolecular hybrid {[La(EPC)3(H2O)3]2(Pb6I18)}n (EPC+ = N-ethyl-pyridium-4-carboxylate) (1) has been structurally determined, which assume significance for its incorporating lanthanide metal-carboxylic coordination polycation into polymeric iodoplumbate to get heterometallics. 1 consists of 1-D (Pb6I18)n6n- zigzag-like anion chains with lanthanide metalcarboxylic [La(EPC)3(H2O)3]n3n+ polycations, which arrange in a criss-cross configuration. C–H⋯I and C–H⋯O hydrogen bonds among inorganic anions and polycations contribute to the formation of a 3-D supramolecular framework. Moreover, the framework displays an absorption edge at 2.46 eV which is comparable to PbI2’s absorption edge.

► Incorporating lanthanide metal-carboxylic coordination polycation into polymeric iodoplumbate to get heterometallic. ► (Pb6I18)n6n- anion chains and lanthanide metal-carboxylic [La(EPC)3(H2O)3]n3n+ polycations are in criss-cross configuration. ► semiconductor nature with optical gap of 2.46 eV.