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 ( Pb 6 I 18 ) n 6n- zigzag-like anion chains with lanthanide metalcarboxylic [ La ( EPC ) 3 ( H 2 O ) 3 ] n 3n + 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.