Photoredox and Electrochemical Methods for C-N Bond Forming Reactions
In the "bottom-up" approach, materials and devices are constructed from molecules capable of assembling themselves by principles/methods of molecular recognition. Although well-defined assemblies can be engineered by exploiting various noncovalent interactions, there are limited methods in the literature regarding the design and analysis of self-guiding molecules for materials application in which there is a strategic integration of the self-assembling motif. The principal research conducted in the Watkins Group encompasses fundamental studies towards understanding the molecular assembly of complex systems as it relates to overall performance. Reported are design guidelines towards novel building blocks for functional materials—specifically those for applications in optoelectronic devices and biomaterials. The multi-step synthesis of these building blocks is discussed. Spectroscopic analysis, as well as characterization via transmission electron microscopy (TEM) and X-ray crystallography of the molecular components and their resulting supramolecular assemblies, reveal materials possessing properties that are comparable to—even surpass—those commonly reported in the literature. Results of this study will be employed towards further research in novel molecular components capable of yielding high performing materials.
A recent paper by the Hilinski Group in The Journal of Chemical Science has been highlighted by Synfacts and chosen as "Synfact of the Month." The paper, Organocatalytic C(sp3)–H Amination through Nitrenoid Transfer. The publication can be seen here.
Professor Ken Hsu is featured in the Future of Biochemistry, the special issue of the ACS publication Biochemistry. This special issue features the work of 44 Junior Faculty that were selected from across the globe who are combining an ever-diversifying set of skills and backgrounds to tackle problems of biochemical relevance. See the Introductory Editorial and Dedication that lists Professor Ken Hsu here.
White phosphorus (P4) has been the traditional entry point into phosphorus chemistry. The thirteenth element to have been isolated, it can be oxidized with elemental oxygen or chlorine, or reduced in a variety of ways. We investigated its reduction using early transition metal systems and breakdown to produce complexes with terminal metal-phosphorus triple bonds. Such terminal phosphide complexes possess nucleophilic phosphorus atoms, paving the way to new phosphorus-element bonded systems.
Cells are poised to respond to their physical environment and to chemical stimuli in terms of collective molecular interactions that are regulated in time and space by the plasma membrane and its connections with the cytoskeleton and intracellular structures. Small molecules may engage specific receptors to initiate a transmembrane signal, and the surrounding system efficiently rearranges to amplify this nanoscale interaction to microscale assemblies, yielding a cellular response that often reaches to longer length scales within the organism.