Our oceans are the largest generators of highly saline and organic-rich atmospheric aerosol.  Research in the Allen lab investigates ocean and sea spray aerosol systems to understand interfacial speciation and organization to then inform on atmospheric aerosol, cloud, and marine surface reactivity, correlating to climate change and its contributing uncertainties. Surface selective experiments reveal surface propensity of hydrated ions and ion pairs and generation of electric fields inherent to the ordering of electrical double layers at aqueous surfaces.

Nanophotonics involves the development of fundamental science, materials, and applications that leverage the interaction of light and matter on the nanometer to micrometer length scales. This growing and highly interdisciplinary field involves chemistry, materials science, physics, engineering, and bio-science. In this presentation Dr. Kuebler will introduce the field of nanophotonics and describe some work done by his group in this area.

The highly dynamic nature of metabolites and their abundances makes metabolomics a powerful endpoint of the ‘omics’ cascade, yielding a molecular profile that is closest to the physiological phenotype. Metabolomic profiles are therefore sensitive to subtle perturbations observed in early disease stages or disease progression, which may be difficult to detect at the proteome or transcriptome levels.

Scientists have exploited enzymes as catalysts for various chemical transformations for over 30 years. The benefits of using enzymes over other synthetic catalysts are numerous and include their specificity, selectivity, and stability. These strengths can also be weaknesses; enzymes are often only active for a few substrates, while synthetic catalysts can often be readily-tuned to increase substrate scope. The directed evolution of enzymes has been used to increase the substrate scope and/or change the selectivity of natural enzymes.

Carbohydrates are the most abundant molecules among the four essential classes of biomolecules that also include nucleic acids, lipids, and proteins. Unlike proteins and nucleic acids, which follow template-driven synthetic pathways, there is no general route to the synthesis of carbohydrates. This literature seminar will focus on the commonly used methods to synthesize oligosaccharides and the gradual movement of the field towards automation.

Aggregation induced emission (AIE) molecules are a type of compounds that emit weak fluorescence in diluted solution but emit strong fluorescence in aggregated state. Traditional organic fluorescent molecules tend to emit strong fluorescence in diluted solutions, but their fluorescence will be quenched in aggregated state, which are also known as aggregation-caused quenching (ACQ) effect. The effect is due to the excimer formed due to the π-π stacking between two molecules. AIE effect is first introduced by Dr.

In a multi-outcome experiment (MOE), there is at least one modifiable unknown component for students to identify. In the three projects in this talk, unknown starting material will the unknown component to identify. Student will utilize a series of modern analytical techniques to characterize the final product, including NMR spectroscopy, IR spectroscopy and melting point determination. This kind of multi-outcome experiments help bridge the gap between NMR theories taught in the lecture and practice with laboratory samples.