Syntheses, characterization and the liquid-phase formation enthalpy changes of two new one-dimensional ribbon-like lanthanide supermolecular polymers
摘要:
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 pi-pi stacking interactions, have been synthesized by reactions of lanthanide (III) salts with 5-nitroisophatha acid (5-H(2)nip) 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 degrees C using an RD496-III type microcalorimeter, which were Delta H-r(m)o(1) = -9.21 kJ mol(-1), and Delta H-r(m)o (2) 11.02 kJ mol(-1), respectively. (C) 2006 Elsevier B.V. All rights reserved.
Syntheses, characterization and the liquid-phase formation enthalpy changes of two new one-dimensional ribbon-like lanthanide supermolecular polymers
摘要:
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 pi-pi stacking interactions, have been synthesized by reactions of lanthanide (III) salts with 5-nitroisophatha acid (5-H(2)nip) 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 degrees C using an RD496-III type microcalorimeter, which were Delta H-r(m)o(1) = -9.21 kJ mol(-1), and Delta H-r(m)o (2) 11.02 kJ mol(-1), respectively. (C) 2006 Elsevier B.V. All rights reserved.