|MIT Department: Chemistry
Faculty Mentor: Prof. Jeremiah Johnson
Undergraduate Institution: Spelman College
My name is Taylor Talley, and I am a rising senior at Spelman College in Atlanta, Georgia. I have been working as a medical assistant at a COVID-19 testing site where I take care of children and adults. I have a passion for patient interaction and am actively developing my research interests. I am interested in medical and clinical research and upon graduation, I plan to pursue the MD-Ph.D. degree to become a Physician-Scientist to intersect clinical care and research.
Polymer-MOC Porosity through RAFT Polymerization
Taylor A. Talley 1, Matthew A. Pearson2 and Jeremiah A. Johnson2
1Department of Chemistry and Biochemistry, Spelman College
2Department of Chemistry, Massachusetts Institute of Technology
Metal-organic cages (MOCs) are discrete coordination cages composed of metal ions which are connected by organic ligands. The modularity and inherent porosity of MOCs make them attractive materials for applications in gas storage and separation, though they often suffer from a lack of processability. We, therefore, sought to develop a hybrid polymer-MOC (polyMOC) material with accessible permanent porosity that could enable more favorable mechanical properties. We utilized a Radical Addition-Fragmentation Transfer (RAFT) polymerization due to its ability to control the molecular weight and dispersity of chains and allow the synthesis of block copolymers and polymers with more complex architectures. We developed a procedure using the RAFT polymer ligand, free isophthalic acid, and Cu(NO3)2·2.5H2O to form novel polymer-Cu24(m-bdc)24 cage hybrids. Using a series of ratios of free ligand to polymer-bound ligand we determined the crystallinity of the material could be tuned, based on PXRD. 1H NMR of digested materials and IR spectroscopy further confirmed the successful incorporation of the polymer ligand in the material and that polymer incorporation varied by the initial stoichiometric ratios. This research lays a foundation for the development of bulk copper and rhodium polyMOC materials, including the addition of multiple polymer blocks for processable polyMOC materials.