Abstract

A new three-dimensional lanthanide–manganese metal–organic framework [Gd2Mn3(PZTC)4(H2O)12]·5H2O (PZTC=2,3,5-Pyrazinetricarboxylate) has been synthesized under hydrothermal conditions and characterized by IR, elemental analyses, and X-ray diffraction. Single-crystal X-ray diffraction shows that Gd3+ and Mn2+ ions are linked together to form a porous 3D Gd–Mn MOF by the alternative arrangement of two kinds of PZTC3− ligands. Taking the Gd, Mn and PZTC as node, the Schläfli symbol of the topology can be expressed as {4;82}2{42;6}2{42;84}2{43;6;84;102}2{8}. Magnetic study indicates the magnetic coupling between two Mn2+ ions through double monatomic carboxylate–oxo bridges is weak antiferromagnetic, while that between Gd3+ and Mn2+ ions through the carboxylate group in syn–anti-bridging mode is negligible.

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