Seminar Date: Tuesday, March 11, 2025
Time: 11:00 AM PT
Location: 67-3111 & Zoom
Talk Title: Polyoxometalate-Based Networks: From SCSC Transformations to Ultra-Selective Ion Separation
Zoom link
Abstract:
Polyoxometalates (POMs) are versatile molecular clusters with the ability to form multi-dimensional coordination networks, offering opportunities for both fundamental studies and practical applications. In this work, we first investigate Single-crystal-to-single-crystal (SCSC) transformations within a metal oxide framework constructed from modified Preyssler clusters bridged by lanthanide, yttrium, or thorium ions. By tracking labeled central ions during crystallization, we uncover key mechanisms governing SCSC transformations, enabling precise control of atomic arrangements in complex networks. Building on this, we further demonstrate the application of POM-based materials in critical resource recovery. Using a polyoxoniobium (PONb) network, we develop the “Mg-PONb sponge,” achieving ultra-selective separation of Li⁺ and Mg²⁺ ions from brines with efficiencies exceeding 99% and selectivity values surpassing 5000 under extreme conditions. This study bridges fundamental insights into POM-based structures with innovative solutions for sustainable ion separation technologies.
