Syntheses, characterization and the liquid-phase formation enthalpy changes of two new one-dimensional ribbon-like lanthanide supermolecular polymers

Two novel one-dimensional ribbon-like mixed-ligand supermolecular polymers, [Ln(5-nip)(phen)(NO3) (DMF)]n (Ln = Pr (1) and Ho (2)), assembled into two-dimensional networks by strong π–π stacking interactions, have been synthesized by reactions of lanthanide (III) salts with 5-nitroisophatha acid (5-H2nip) and 1,10-phenanthroline (phen) in DMF solvent. They possessed high thermal stabilities and their liquid-phase formation enthalpy changes were determined in DMF solvent at 25.15 °C using an RD496-III type microcalorimeter, which were image, and image, respectively.