Browsing by Author "Vizuet, Juan P."
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Item Synthesis and Characterization of a Holmium 2,2′-bipyridine-5,5′-dicarboxylate MOF: Towards the Construction of a Suitable Holmium Carrier(Pergamon-Elsevier Science Ltd, 2019-02) Vizuet, Juan P.; Lewis, Abigail L.; McCandless, Gregory T.; Balkus, Kenneth J.; 0000-0003-1142-3837 (Balkus, KJ); Vizuet, Juan P.; Lewis, Abigail L.; McCandless, Gregory T.; Balkus, Kenneth J.Based on the 2,2′-bipyridine-5,5′-dicarboxylic acid ligand (H₂bpdc), a new metal-organic framework using holmium as the coordinating metal site was synthesized through a solvothermal reaction. The 3D compound {[Ho₂(bPdc)₃(DMF)₂] · 2(DMF)}ₙ (1) was characterized by single crystal X-ray diffraction, FTIR, TGA and PXRD. The coordination between H₂bpdc, the solvent, and holmium (CN = 7) allows for the construction of a MOF containing potentially free metal sites and uncoordinated N-donor sites. These features make this MOF an attractive holmium carrier for radiotherapeutic applications.Item Transition from a 1D Coordination Polymer to a Mixed-Linker Layered MOF(American Chemical Society) Vizuet, Juan P.; Howlett, Thomas S.; Lewis, Abigail L.; Chroust, Zachary D.; McCandless, Gregory T.; Balkus, Kenneth J.; 0000-0003-1142-3837 (Balkus, KJ); Vizuet, Juan P.; Howlett, Thomas S.; Lewis, Abigail L.; Chroust, Zachary D.; McCandless, Gregory T.; Balkus, Kenneth J.A novel copper(II) metal-organic framework (MOF) has been synthesized by modifying the reaction conditions of a 1D coordination polymer. The 1D polymer is built by the coordination between copper and 2,2′-(1H-imidazole-4,5-diyl)di-1,4,5,6-tetrahydropyrimidine (H-L1). The geometry of H-L1 precludes its ability to form extended 3D framework structures. By adding 1,4-benzenedicarboxylic acid (H 2 BDC), a well-studied linker in MOF synthesis, we achieved the transition from a 1D polymer chain into porous 2D layered structures. Hydrogen bonding between L1 and BDC directs the parallel stacking of these layers, resulting in a 3D structure with one-dimensional channels accessible by two different pore windows. The preferred growth orientation of the crystal produces prolonged channels and a disparity in pore size distribution. This in turn results in slow diffusion processes in the material. Furthermore, an isoreticular MOF was prepared by substituting the BDC linker by 2,6-naphthalenedicarboxylic acid (H₂NDC). © 2019 American Chemical Society.