Publications by authors named "J Zaleski"

Article Synopsis
  • Researchers developed new cisplatin-like platinum metalloenediynes using thermally resistant phosphine enediyne ligands, demonstrating how different ligand substituents affect cyclization kinetics.
  • The first crystallographic studies of these complexes revealed they have short inter alkyne distances, indicating a potential for spontaneous cyclization at room temperature, influenced by their electronic properties.
  • Kinetic studies showed that complexes with electron-donating groups cyclized much faster than those with electron-withdrawing groups due to their unique electronic effects on bond formation and cyclization barriers.
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Introduction: The institutions (i.e., hubs) making up the National Institutes of Health (NIH)-funded network of Clinical and Translational Science Awards (CTSAs) share a mission to turn observations into interventions to improve public health.

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Background: Enediynes are anti-cancer agents that are highly cytotoxic due to their propensity for low thermal activation of radical generation. The diradical intermediate produced from Bergman cyclization of the enediyne moiety may induce DNA damage and cell lethality. The cytotoxicity of enediynes and difficulties in controlling their thermal cyclization has limited their clinical use.

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Multi-metallic hybrid nancatalysts consisting of a porous metal oxide host and metal satellite guests serve as a scaffold for multi-step transformations of divergent and energy-challenging substrates. Here we have developed a 3D porous MgO framework (Lewis basic host) with Ag nanoparticles (noble metal guest) for ambient pressure activation and insertion of CO into unsaturated alkyne substrates. The hybrid MgO@Ag-x (x = 2, 5, 7, 8 at % Ag) catalysts are synthesized by impregnating Ag ions in porous MgO cubes followed by reduction using NaBH.

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Fibrin plays a critical role in wound healing and hemostasis, yet it is also the main case of cardiovascular diseases and thrombosis. Here, we show the unique design of Au-Cu@PANI alloy core-shell rods for fibrin clot degradation. Microscopic (transmission electron microscopy (TEM), scanning transmission electron microscopy-energy-dispersive X-ray (STEM-EDX)) and structural characterizations (powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS)) of the Au-Cu@PANI hybrid material reveal the formation of Au-Cu heterogeneous alloy core rods (aspect ratio = 3.

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