Two Novel Fe7Mg8 and Fe8Co7 Cluster-Based 3D Heterometallic Coordination Polymers with H(4)PMIDA and H3BTC as the Co-ligands: Synthesis, Structures, and Fluorescent Properties

摘要

Two novel Fe7Mg8 and Fe8Co7 cluster-based 3D heterometallic coordination polymers, [Fe7Mg8(PMIDA)(6)(BTC)(2)(H2O)(12)]center dot 6H(2)O(1) and [Fe8Co7(PMI-DA)(6)(BTC)(2)(H2O)(12)]center dot 6H(2)O((2)), constructed by multifunctional H(4)PMIDA (N-(Phosphonomethyl) imino-diacetic acid) and H3BTC(1,3,5-benzenetricarboxylate acid) as the co-ligands, have been synthesized under hydrothermal conditions, and characterized by elemental analysis, IR spectrum, powder X-ray diffraction, thermal analysis and single-crystal X-ray diffraction. The complexes 1 and 2 are basically isostructural and feature a cubic 3D open framework constructed by [M-15(PMI-DA)(6)(H2O)(12)]] (M-15 = Fe7Mg8 for 1 and Fe8Co7 for 2) heteronuclear clusters and BTC3- ligands. Moreover, the solid-state fluorescence properties of the complexes have also been investigated at room temperature.